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Minerals and GeologyUnited States Department of AgricultureForest Service Southern Research Station General Technical Report SRS-33 Ozark-Ouachita Highlands Assessment:
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| Highlight | Arkansas | Missouri | Oklahoma |
| Worlds largest known concentration of lead oreb and past leading producer | x | ||
| Three historic world-class lead-zinc producing districts | x | ||
| Past world leading producer of baritec | x | x | |
| The principal provider of transparent quartz crystal in North America | x | ||
| Historically yielded more bauxited than all other U.S. production combined | x | ||
| World-wide recognized novaculitee deposits | x | ||
| Second largest bottled water producer in the world | x | ||
| Largest production of silica stone abrasives in the United States | x | ||
| Among the largest natural gas fields in the United States | x | x | |
| Worlds largest grahamitef and one of worlds largest impsonitef deposits | x | ||
| Past leading zinc producer in the world | x | ||
| World-class crinoid fossil slabs | x | ||
| World-renowned mineral collecting localities | x | x | |
| The original source sites for 9 scientifically described mineral speciesg | x | ||
| First U.S. diamond mine and 2nd leading producer of diamonds in U.S.h | x |
aTable 7.2 shows the top mineral resources by national standards within the Assessment area.
bThe lead bearing mineral being mined is galena.
cBarite is a heavy dense mineral that is essential to oil and gas drilling operations, also to some medical applications.
dBauxite is the ore of aluminum.
eWhetstone grade novaculite used as sharpening stones for knives and other tools including surgical instruments.
fThese are asphaltites, black solid bitumens that resemble coal but are more closely related to oil.
gArkansas mineral species: Rectorite, kimzeyite, benstonite, kidwellite, eggletonite, strazcekite, delindeite, lourenswalsite, mahlmoodite.
hThe Crater of Diamonds State Park, located in Pike County adjacent to the Highlands.
Sources: Howard (1997); Seeger (1997); Suneson (1997)
On a national level, the Arkoma Basin of Oklahoma and Arkansas is highly regarded as an important United States exploration and production area for gas resources. The Crater of Diamonds State Park, adjacent to the Highlands in Pike County, AR, is a major attraction to gem enthusiasts and the general public from across the country. Table 7.1 highlights these and other mineral resources in the Assessment area.
The 1996 Mineral Industry Surveys (MIS) for Arkansas, Missouri, and Oklahoma reported that among all 50 States, Missouri ranked 10th, Arkansas 29th, and Oklahoma 34th in the value of total nonfuel mineral production (USDI GS 1997a, b, c). The total mineral production value for the three States was over $2 billion. Approximately $1.2 billion was from within the Assessment area where 60 percent of these States' mineral activities occur. Combined, these three States account for more than 5 percent of the total United States production value for nonfuel minerals. In 1996, these States also ranked among the top 10 States in the amount of production for a number of mineral commodities (table 7.2). For instance, Arkansas was first in quartz lascas, silica, stone, and quartz crystal. Missouri was first in the nation in the production of lead, fire clay (much of which is mined from within the Assessment area), and lime.
Information on the production and value of the various minerals in the Assessment area has been compiled from the three State geological agency reports written specifically for this Assessment (available at the Assessment Web site, <www.fs.fed.us/oonf/ooha.welcome.htm>). It should be noted that authors of the State reports took differing approaches to discussing and displaying commodity information about minerals.
| United States production rankinga | Arkansas | Missouri | Oklahoma |
| Only in U.S.b | Quartz lascasd | ||
| First | Quartz lascasd, silica stone, quartz crystald e | Leadd, fire claysf, limef | |
| Second | Iron oxide pigments | Tripoli | |
| Third | Tripolid | Iron ore, barite | Fire clayf |
| Fourth | Gemstonesd(mostly quartz crystald), kaolin, fire clayf | Zincd, crushed stonef | Feldsparf |
| Fifth to ninth | Common clayf | Portland cementf, silverd, fullers earthf, copperd | Sand and gravelf |
| Significant c | Crushed stoned f, sand and gravelf, gypsumf, dimension stoned f | Sand and gravelf, masonry cementf, common claysf | Crushed stonef, portland masonry cementsf, claysf |
aBased on USGS estimates of quantities produced in the 50 States during 1996.
bArkansas is the only State to produce quartz lascas used in high-tech electronic and fiber-optic industries.
cAdditional significant production ranking below the top ten.
dMineral commodity is produced either wholly or in part from national forest lands.
eImplied from the Gemstone and the Arkansas U.S. Geological Survey Mineral Industry Surveys reports for 1996.
fMineral commodities produced both in and out of the Assessment area.
Source: U.S.D.I., U.S. Geological Survey (1997a, b, c)
Consequently, the information displayed in the tables in this chapter is slightly different for each State. Additional information comes from Forest Service records. For example, the tables also display production and value information for mineral commodities that come from the national forests within the Assessment area.
The 1997 Missouri Geological Survey report (Seeger 1997) presents a detailed discussion of the contributions of the Missouri portion of the Assessment area to national minerals production. Table 7.3 displays some of these contributions. Production in the Assessment area ranges from 402 tons of silver and 7,000 tons of dimension (building) stone to nearly 2.9 and 5.8 million tons of lead and iron ore, respectively. Between 75 and 80 percent of U.S. lead production comes from Missouri's Mark Twain National Forest, a principal source of the world's lead supply (Seeger 1997).
Table 7.4 displays the nonmetallic minerals produced in the Missouri portion of the Assessment area from 1987 through 1995 (with the exception of masonry cement for which figures were available from 1987 through 1989 only). (None of this production was from the Mark Twain National Forest.) The Assessment area of Missouri contributes 27 to 58 percent of the Highlands production of hardrock and other nonmetallic minerals such as crushed stone, cement, lime, sand, gravel, and clay.
The 1997 Oklahoma Geological Survey report (Suneson 1997) describes the contributions the Oklahoma portion of the Assessment area makes to the national marketplace, primarily in the form of energy minerals (gas and coal) and dimension stone materials. The report identifies the mineral resources produced recently and historically from within Assessment area counties (table 7.5). (These minerals are produced outside the Assessment area in Oklahoma as well.) With the exception of a small amount of building stone sales primarily for noncommercial use, none of the Oklahoma Assessment area minerals are being produced from national forest lands at this time. Because the Oklahoma building stone industry ships its products across the United States and is presently operating at a number of locations near the Ouachita National Forest, the industry may look to the national forest for additional commercial sites.
| Mineral commodity | Production (tons) | Value ($) | Production from national forest | % of Highlands Production |
| Crushed stone | 513,424,000 | 1,990,000,000 | None | 53 |
| Portland cement | 42,269,000 | 1,788,280,000 | None | 53 |
| Masonry cementa | 455,000 | 21,937,000 | None | 53 |
| Lime | Data not available | Data not available | None | 53 |
| Sand and gravel | 84,857,000 | 255,695,000 | None | 58 |
| Sand | 4,821,000 | 90,179,000 | None | 58 |
| Clay | Data not available | Data not available | None | 27 |
aMasonry cement figures available only for 19871989 and displayed as partial data.
Source: Seeger (1997)
The 1997 Arkansas Geological Commission report (Howard 1997) deals with the broadest range of mineral commodities produced from within the Assessment area. The Assessment area in Arkansas embraces three generally recognized geologic regions: the Arkansas Ozarks, Arkansas Valley, and Arkansas Ouachitas. Howard noted mineral production and value by these regions. Table 7.6 displays the minerals produced wholly from within the Assessment area and from the Ozark and Ouachita National Forests. Vital hardrock and industrial mineral resources and unique gemstones are contributed to the national and international marketplace from the Arkansas portion of the Highlands.
| Mineral commodity | Assessment area productuion (years; counties) |
| Oil | 1,431,027 BBLS (19901993; Muskogee County) |
| Natural gas | 2,267,351 MCF (19901993; Muskogee County) |
| Natural gas, Arkoma Basin | 5 Trillion cubic feet (18941990; LeFlore, Haskell, Latimer, and Pittsburg Counties) |
| Natural gas, Arkoma Basin | 1,615,580 MMCF (19901993; Sequoyah, Haskell, LeFlore, Latimer, Pittsburg, and Atoka Counties) |
| Coal | 274,000,000 tons (18801994; Mayes, Muskogee, Sequoyah, Haskell, Pittsburg, Latimer, LeFlore, and Atoka Counties) |
| Coal | 1,376,628 tons (1996; primarily LeFlore County)a |
| Stone, aggregate and dimension | 19,290,963 tons (19931997; all Oklahoma Assessment counties)b |
| Sand and gravel | 1,854,045 tons (1995 and 1997; all Oklahoma Assessment counties) |
| Tripoli | 6,133 tons (1997; Ottawa County) |
| Clay and shale | 791,833 tons (1993, 1995, 1997; Adair, Cherokee, LeFlore, Muskogee, and Sequoyah Counties)c |
| Lime | 1,941,369 tons (1993 and 1995; McCurtain and Sequoyah Counties) |
BBLS=Barrels; MCF=Thousand cubic feet; MMCF=Million cubic feet
a81% of total Oklahoma coal production
b23% of total Oklahoma production; 52 tons produced from National Forest in 1996
c23% of total Oklahoma production
Source: Suneson (1997)
| Mineral commodity | Production | Value ($) | Production from national forest (NF) |
| Ozark Region | |||
| Lime | 2,411,797 tons (1894-1966) 1,673,000 tons (1972-1981) | $24,067,522 (1894-1966) $37,334,000 (1972-1981) | |
| Limestonea | 19,978,377 tons (1967-1979) | $6-$8 per ton (1997) | |
| Natural gas | 5,648,643 MCF (1953-1988) | $1.50-$3.50 per MCF (1997 wellhead price)f | 634,596 MCF (1996) Ozark NF |
| Sand and gravel | 97,634,000 tons (1984-1994) | $345,384,000 (1984-1994) | |
| Sandstone (statewide) | 50,000,000 tons (1958-1966) (15,000,000 tons/yr.) | 23,144 tons (1996) Ozark NF | |
| Spring water, bottled | 85,000,000 gallons (1991) | $90,000,000 (1991) | |
| Arkansas Valley Region | |||
| Coal, surface | 15,577,840 tons (1840-1996) | (past production) | |
| Coal, underground | 90,612,153 tons (1840-1996) | ||
| Coal | 769,793 tons (1986-1996) | $30/ton (1997) | |
| Natural Gas | 1,678,061,704 MCF (1986-96) | Reported in Ozark Region | See Ozark Region |
| Sandstone | Reported with Ozark Region | ||
| Ouachita Region | |||
| Barite | 9,000,000 tons (1940-1982) | 500,000 tons (1960- 1982) Ouachita NF | |
| Bauxite | 76,803,909 tons (1898-1981) | $1,200,000,000 | |
| Diamondb | 20,396 diamonds totaling 4065.19 carats (1972-1996) | $1-$10 per point (100 points/carat) | |
| Gypsum | Data not available | ||
| Nepheline syenite "blue/gray granite" | 5,000,000 tons per year | Varies by product from $4 to $25 per ton | |
| Novaculite(silica stone)c | 925,000 pounds (1995) | $3,940,000 (1995) | 15,000 lbs. (1997) Ouachita NF |
| Quartzd, crystal | 865,796 pounds (1996) | $1,408,416 (1996) | 141,000 pounds (1996) Ouachita NF |
| Quartzd, electronic grade | 1,300,000 pounds (1996) | $1,100,000 (based on average grade value) | 1,300,000 pounds (1996) Ouachita NF |
| Sandstonee | Reported with Ozark Region | 182,502 tons (1996) Ouachita NF | |
| Soapstone | 1,500 tons/yr. average | ||
| Shale and slaty shale | Data not available | ||
| Tripoli | 15,000 tons/yr. average | ||
| Turquoise | 1,000 pounds (1974-1988) | 10 lbs. sold for $100/lb | 1,000 pounds (1979- 1985) Ouachita NF |
| Spring water, bottled | Reported with Ozark Region |
MCF=thousand cubic feet.
aLimestone, agricultural and chemical grade.
bDiamond information from Hall 1997.
cNovaculite information from USFS records, Ouachita National Forest.
dQuartz information from USFS records, Ouachita National Forest.
eSandstone and aggregate on national forests from USFS 1996; national forest stone in "Ozark Region" is for the Ozark National Forest;
national forest stone in "Ouachita Region" is for the Ouachita National Forest.
fNatural gas value information from Gates 1997.
Source: Except where otherwise noted data is from Howard (1997)
Lead exploration and extraction presently occurs in Missouri in a band approximately 40 miles (mi) wide and 100 mi long within the north-central portion of the Assessment area. The expectation is that future lead exploration and mining will remain within this band where the resource is concentrated (Seeger 1997). Significant exploration is extending southward into north Arkansas (Howard 1997). There are two major companies presently mining galena for lead and associated minerals from underground mines in the Missouri Ozarks. Part of the mining operations occurs on the Mark Twain National Forest. The operations are conducted under State and Federal environmental regulations, permits, and plans that require routine compliance inspections.
There are 58 quartz mines currently permitted (data base year 1996) by State and Federal agencies in the Ouachita Mountains of the assessment area. One of these mines is for high-grade quartz used in fiber-optic and other high-tech uses. It is the only mine of its type in North America. Many of these operations, including the high-grade quartz operation, occur on the Ouachita National Forest. Most quartz mines are relatively small, surface-excavation operations. The nature, pattern, and size of typical quartz deposits generally restrict the size of these mines, which normally impact 1 to 5 acres (ac). The two largest quartz mines are approximately 50 ac in size and located on private lands. Most quartz mines have a relatively short mine life of 5 to 10 years. Quartz mining operations proposed to take place on the Ouachita National Forest require extensive review and analysis, stipulation, bonding, and reclamation planning before approval is granted. The likely future trend is that quartz operations will continue to occur within the Assessment area because of the uniqueness of the deposits and the demand for the resource (USDA FS 1996 b).
Gas exploration operations are typically of short duration, lasting only a few weeks to several months. Exploration and production sites are generally less than an acre to several acres in size. State agencies are involved in the permitting and oversight process for exploration proposals and for producing wells on all lands within the State. Operations proposed to take place on national forests require extensive review and analysis, stipulation, bonding, and reclamation planning before approval is granted. All sites are fully reclaimed upon completion of the operation. The likely future trend is that gas operations will continue to occur within the Assessment area as new gas sources are sought and developed to meet societal demands.
Coal operations generally impact large tracts in relatively flat-lying areas. The operations take place under State and Federal controls and permitting authorities. Coal in the Assessment area is presently mined on private lands in Oklahoma. There have been coal mining operations in the past on national forests in Arkansas, but they are now closed and fully reclaimed. Currently, there are no coal mining operations on any of the three Assessment area national forests nor are there any proposals for new mines. Although the demand for coal is national in scope, coal mined in the Assessment area is utilized primarily to fuel a power plant in Oklahoma that supplies power for much of eastern Oklahoma (Hatley 1997). The likely future trend is for coal mining to continue as long as there is a demand for it.
The real value of a mineral resource is not only its usefulness to society, but also its direct and immediate economic benefits to local communities and economies in terms of exploring for, removing, and processing that resource. From this value comes employment and salaries to benefit families and taxes to provide for government services. The State geological reports prepared for the Assessment project include some salary and tax information. The Missouri report provides insight and examples for the Missouri Assessment area minerals industry and its economic effect on local communities (Seeger 1997).
The minerals industry typically pays workers at wage levels above most other industries (also see Chapter 4). Examples from Missouri show the average wage is $16.30 per hour for the metals mining industry and $11.20 per hour for the industrial minerals sector (Seeger 1997). These are significantly higher than comparable recreation, sawmill, and timber labor wages, which range from $7.20 to $9.40 per hour. Salaries at a major mine on the Mark Twain National Forest in Missouri range from $20,000 to $80,000 per year. In 1996, Missouri metal mining companies within the Assessment area alone paid salaries totaling $31.2 million (Seeger 1997). State employment data from Oklahoma indicate that 6 of the professions related to the geologic-resources industry (geologists, mining and petroleum specialists, and others) are in the top 25 of Oklahoma's highest paying occupations (Suneson 1997). In Arkansas, the quartz mining industry pays miners in the $7.50 to $11 per hour range, making these among the top wages paid in the rural areas where the mines are located (Coleman 1997).
Contributions to the tax base from mining-related activities are important to local, State, and Federal governments. For example, mining industry employees within the Missouri Assessment area annually pay more than $14.8 million in State and Federal income taxes (Seeger 1997). One major Missouri metals mining company pays approximately $10 million annually in combined taxes. Seven mineral industry companies within the Missouri portion of the Assessment area pay personal property and real estate taxes exceeding $4.3 million to six counties (Seeger 1997). During the time the mines operated, severance taxes from major bauxite (aluminum) mining within the Arkansas Assessment area paid for all the local school district's operating costs, including new construction and teachers' salaries. Even after the mines closed, they continued to benefit the local school district from savings during operational years (Howard 1997).
Table 7.7 displays the number of mines, gas wells, and mine and gas industry employees for the Assessment area in data base year 1996. The MSHA report includes the number of employees at the mines and mining-related operations (including some minerals manufacturing operations) that MSHA oversees as part of its mine safety permitting and inspection responsibilities. Some mines do not appear in MSHA records, but do appear in records administered by the States or by the Forest Service. The 690 mining-related operations within the Assessment area provide employment to about 9,000 persons. The gas well and pipeline industry employs about 1,600 more persons for over 6,500 producing gas wells in the Highlands. Thus, more than10,500 persons are employed directly by mining-related operations within the Assessment area.
| Assessment area | MSHA mines records | State mines records | FS mines records | Total mines and mine employees | Total gas wellsa and employees |
| Mines |
|||||
| Arkansas | 169 | 42 | 61 | 272 | 2,968 |
| Missouri | 217 | 41 | 258 | 0 | |
| Oklahoma | 78 | 82 | 160 | 3,563 | |
| Total | 464 | 165 | 61 | 690 | 6,531 |
| Employeesb |
|||||
| Arkansas | 2,958 | 86 | 154 | 3,198 | 480c |
| Missouri | 4,439 | 128 | 0 | 4,567 | 0 |
| Oklahoma | 928 | 272 | 0 | 1,200 | 1,116 |
| Total | 8,325 | 486 | 154 | 8,965 | 1,596 |
aProducing gas wells and associated employees within the Assessment area in 1996. These are not in the mine records for USDL Mine Safety
and Health Administration (MSHA), State, nor Forest Service (FS). Source of information for gas wells and gas industry employees from
Gates 1997, Claxton 1997, and Suneson 1997.
bMine Safety and Health Administration and Forest Service mine records contain employee numbers. Employee numbers in State records
estimated based on size and type of similar typical operations where employee numbers are known.
cNumbers for Arkansas are based on Oklahoma employee numbers for similar operations (Oklahoma State gas records contain employee numbers).
Sources: USDL Mine Safety and Health Administration (1996); Arkansas Department of Pollution Control and Ecology, Mining Division (1997); Missouri Department of Natural Resources, Mining Division (1997); Oklahoma Department of Mines (1997); UDA Forest Service (1996), Gates (1997); Claxton (1997); Suneson (1997)
The secondary companies that support the mining industry and the tertiary businesses that move the mineral resources into society contribute significantly to the overall Assessment area employment that is related to minerals. These are businesses, companies, and jobs that would not exist if the mineral resources were not present or could not be extracted. One source, a 1997 report from the National Mining Association, estimates that the number of jobs directly or indirectly due to mining in Arkansas, Missouri, and Oklahoma is over 200,000 (including an estimated 50,000 in the Assessment area) (Leaming 1997). In Missouri, an association of companies that supply goods and services to the mining industry lists 88 member businesses and companies (Seeger 1997). Mount Ida, AR, a Highlands community of just over 1,000 persons and the County seat for Montgomery County, is in the heart of the quartz crystal production in the Ouachita Mountains. The Mount Ida Chamber of Commerce estimates that the quartz mining industry in Montgomery County alone directly affects 400 jobs in various support, supply, and marketing businesses (Baldwin 1997).
In 1996, mineral exploration and extraction in the Mark Twain, Ozark, and Ouachita National Forests generated revenues of nearly $6 million (table 7.8) from 969 mineral cases administered by the 3 forests. In the past 10 years, the minerals' revenue from the Highlands national forests has totaled approximately $80 million. This includes an exceptional 2-year period of oil and gas lease bid revenues on the Ouachita National Forest that brought in $31 million in 1990 and 1991. Also, in 1989, Congress passed legislation that moved quartz on the Ouachita National Forest from a nonrevenue to a revenue generating program administered by the Forest Service (Public Law 100-446 Section 323).
Supplies of mineral resources within the Highlands are discussed in detail in State geological reports (Howard 1997, Seeger 1997, Suneson 1997). The three reports also feature discussions of reserves and the discovery potential for many of the mineral commodities within the Assessment area. A mineral commodity spreadsheet matrix displays the past or present production and the mineral discovery potential for each known mineral and mineral commodity for each county within the Assessment area.
| Mineral commodity | Ouachita NF | Ozark NF | Mark Twain NF | Total | ||||
| Number of cases | Revenue ($) | Number of cases | Revenue ($) | Number of cases | Revenue ($) | Number of cases | Revenue ($) | |
| CVMMa, quartz | 50 | 43,493 | 50 | 43,493 | ||||
| CVMMa, rock | 80 | 28,251 | 59 | 14,583 | 1 | 225 | 140 | 43,059 |
| Leases, hardrock | 6 | 5,368 | 36 | 4,955,385 | 42 | 4,960,753 | ||
| Leases, gas, producing | 239 | 269,850 | 321 | 81,564 | 560 | 351,414 | ||
| Leases, gas, not producing | 107 | 551,531 | 107 | 551,531 | ||||
| Mining claims | 35 | 0 | 35 | 0 | ||||
| Applications | 6 | 0 | 6 | 0 | 11 | 0 | 23 | 0 |
| Prospect permit, hardrock | 12 | 5,748 | 12 | 5,748 | ||||
| Total | 416 | 346,962 | 493 | 647,678 | 60 | 4,961,358 | 969 | 5,955,998 |
| Ouachita NF | Ozark NF | Mark Twain NF | Total | |
| CVMMa, quartz | 1,444,196 lbs. | 1,444,196 lbs. | ||
| CVMMa, rock | 212,520 tons | 23,144 tons | 100 tons | 235,764 tons |
| Leases, hardrock | 66,861 lbs. | 3,793,785 tons | 3,793,818 tons | |
| Leases, gas (1995) | 634,596 MCF | 634,596 MCF |
CVMM= Common Variety Mineral Material; MCF= million cubic feet
Source: USFS (1996)
Reserve estimates primarily depend on economic conditions and on exploration for minerals. Estimates of mineral reserves change (1) as the market value for a mineral commodity changes, thereby defining what is or is not considered ore, and (2) as exploration techniques are refined and become more accurate and predictive. The amount and extent of exploration for minerals depends primarily on access— when prospectors can physically enter Federal, State, and private lands, they can use modern equipment and techniques to determine if minerals are present and, if so, at what grade. Such exploration generally does not last long and has a minimal effect on other resources.
Tables 7.9 and 7.10 list the reserve estimates and potential for new discoveries of mineral commodities within the Arkansas portion of the Assessment area.
| Reserve estimates | |||
| Mineral commodity | Assessment area | National forests | Potential for discovery |
| Arkansas Ozark Region | |||
| Coal | Unknown reserves, 2 seamsa | Doubtful | |
| Copper | Unevaluated | Unknown | |
| Diamond | Not known | Unknown | |
| Industrial silica sand | 100's of millions tons | Very high | |
| Iron | 20,000,000 tonsb | Low | |
| Lead and zinc | 100,000 tons | Moderate | |
| Limestone & dolostone | Widespread | Very high | |
| Manganese | 198,000,000 tons | Possible on NF | Low |
| Marble | Unknown | Unknown | |
| Natural gas | 14 producing fields | 66 producing wells | Low to high |
| Nickel | Unknown | Unknown | Low |
| Oil shale | Unknown | Unknown | Low |
| Phosphate rock | Considerable | Low | |
| Rare earth metals | Unknown | Very low | |
| Sand and gravel | Significant | Present | Significant |
| Sandstone | Extensive | Present | Very high |
| Shale | Extensive | Present | Very high |
| Silverc | 100,000 tons | Moderate | |
| Tripoli | Several million tons | Moderate to high | |
| Arkansas Valley Region | |||
| Clay and shale | Significant | Present | Moderate |
| Coal | 1 billion tons, 13 fieldsd | Present | Low to moderate |
| Natural gas | 1.1 trillion cubic feet | Present | Low to very High |
| Sand and gravel | Extensive | Present | High |
| Sandstone | Extensive | Present | High |
| Titanium | Unknown (AR River) | Low |
aCoal seam: an identifiable bed or layer of coal.
bIron at 30% grade, indicating moderate quality.
cSilver with lead and zinc.
dCoal field: a region or area with known coal deposits.
Source: Howard (1997)
| Reserve estimates | |||
| Mineral commodity | Assessment area | National forests | Potential for discovery |
| Antimony | Unknown | Low | |
| Barite, 50-70% gradea | 56 million tons | Significant; known deposits on NF | Lowb |
| Barite, lower grades | 10's of millions tons | Low to moderateb | |
| Bauxite | 113,646,000 tons | Lowb | |
| Clay | Unknown | Moderate | |
| Cobalt with manganese | 1-6 million tons | Present | Low to moderate |
| Copper | Minor | Present | Low |
| Diamond | Very low | Low | |
| Gallium | Data not available | Data not available | |
| Gold | 150 years exploration has revealed no deposits | Low to none | |
| Gypsum | Data not available | High | |
| Iron | Unknown | Negligible to low | |
| Lead and zinc | 15,000 tons | Low | |
| Limestone | Modest | Occurs on NF | Moderate to high |
| Lithium | Minor | Low | |
| Manganese | Some; 50,000 tons | Occurs on NF | Moderate |
| Mercury | Unknown | Moderate | |
| Molybdenum | Unknown | Low | |
| Natural gas | Unknown | Low to unknown | |
| Nepheline syenite | 13 square miles | High | |
| Nickel | Unknown | Low | |
| Niobium | Unknown | Low | |
| Novaculite | Extensive resources | Extensive resources | High |
| Oil | Unknown | Unknown | Low to unknown |
| Quartz | Extensive | Extensive | High |
| Rare earth metals | Unknown | Unknown | Low |
| Sand and Gravel | Extensive | Extensive | High |
| Sandstone | Extensive | Extensive | High |
| Shale and slaty shale | Extensive | Extensive | High |
| Silver | Present | Unknown | Low |
| Soapstone | 50,000 tons | Unknown | Low |
| Tantalum | Unknown | Low | |
| Thorium | Unknown | Low | |
| Titanium | Unknown | Moderate to high | |
| Tripoli | Several million tons | Several million tons | Moderate to high |
| Turquoise | Present | Presentc | Low |
| Uranium | Unknown | Unknown | Low |
| Vanadium | Unknownd | Low | |
| Vermiculite | Unknown | Low | |
| Volcanic Tuff | Present | Moderate | |
| Wavellite | Isolated locations | Isolated locations | Moderate |
| Wollastonite | Unknown | Moderate |
aBarite at 50-70% grade, indicating high-moderate to high quality.
bKnown deposits, however potential is low for new ore discoveries unless price increases for the mineral, then the potential will be high.
cTurquoise was mined on the Ouachita National Forest from 1979 to 1985.
dVanadium was mined from 1962 to 1990.
Source: Howard (1997)
The Ozark National Forest has 66 producing gas wells in areas that have a high potential for additional exploration and development. Similarly, table 7.11 for Missouri and table 7.12 for Oklahoma list the reserves and discovery potentials of mineral commodities within those States. These tables, compiled primarily from the States' geologic reports (Howard 1997, Seeger 1997, Suneson 1997), include information on the mineral resources for the three national forests within the Assessment area. The estimates of reserve and potential are current as of late 1997. The discovery of new economic deposits or the complete extraction of existing ones dramatically affects reserve estimates. For example, the lead industry in southern Missouri indicates there are approximately 13 to 16 years of known ore reserves remaining (Seeger 1997). Similar projection estimates would apply to almost any time period throughout the 270-year mining history of Missouri lead. Over that time, exploration has resulted in the discovery of new ore deposits, mining has resulted in the removal of known deposits, and economics have changed the real value of the commodity. All of these factors have affected the reserve estimates for lead over time. Still, by current estimates, the lead mining industry in Missouri will be gone in 13 to 16 years if exploration is not allowed to take place or if continued exploration does not reveal any new economic deposits. If sufficient exploration takes place, it will likely result in discoveries that will extend the reserve estimates.
The three national forests within the Assessment area include almost 4.4 million acres, the largest land base within the Assessment area managed by one entity. These lands contain important mineral deposits that are currently being mined and equally important mineral reserves and potential for further discoveries as noted in tables 7.9, 7.10, 7.11, and 7.12. While the potential for mineral discovery is specific to the physical evidence for that mineral, minerals development potential is dependent on laws, regulations, policies, and, in the case of private lands, permission for access and development. For example, physical evidence of a mineral deposit may be high, but laws and policies restricting access may render the development potential very low. In some cases— such as on some areas of public land where Federal laws do not allow mineral extraction— this potential may be nonexistent. The minerals development potential is thus one of the major factors affecting access for minerals exploration and development.
There are many factors involved in the costs of exploring for and developing mineral resources. The overall costs include (1) specialized equipment and structures, (2) uniquely qualified personnel, (3) surface access needs, and (4) considerations associated with environmental and reclamation requirements. The time required to explore for, study, and develop a newly discovered mineral resource can be very lengthy. For example, the exploration phase of a venture that anticipates operating a moderately sized surface mine for metallic or nonmetallic ores (i.e., one that produces 20,000 tons per day) will generally take at least 3 years. If a discovery is made, it may take another 5 years of studies and tests and 3 more years of development before production can begin. In other words, it may take a minimum of 11 years to go from initial exploration to production (USDI BM 1991). The Missouri Geological Survey report for the Assessment discusses exploration and development costs associated with non-Federal and Federal lands (Seeger 1997). Table 7.13 presents the time and costs for the largest mining-related activities within the Assessment area— obtaining permits and developing typical lead mines in Missouri. These operations occur on both private lands and the Mark Twain National Forest.
Federal laws and regulations on national forest lands are independent of State boundaries and contribute to costs regardless of where exploration and development activities take place. Natural resource specialists in the Federal Government are required to thoroughly analyze proposed operations on national forest lands to determine potential environmental effects of surface disturbing activities. Such a Federal environmental analysis can take several months for small, minimal surface impact proposals to a number of years for larger ones. Operators must factor in this process as part of the cost of operating on federally managed lands.
State laws governing mineral development differ in content and language among the three States, but they are similar in intent and in their definition of agency responsibilities. Such laws also have a similar influence on costs throughout the Assessment area. Large-scale mining ventures involving the outlay of millions of dollars will typically require proportionately large operating areas. Table 7.14 lists some typical sizes of operating areas for various mining-related activities within the Assessment area.
| Reserve estimates | |||
| Mineral commodity | Assessment area | National forests | Potential for discovery |
| Missouri, southeast | |||
| Lead and other metalsa | 13-16 years | Extensive | High |
| Iron | Large (uneconomical) | High | |
| Metals, maficb complex | Unknown | Present | Unknown |
| Tungsten & manganese | Unknown | Present | Unknown |
| Barite | Not large | Limited | |
| Limestones, high purity | Extensive deposits | High | |
| Igneous rock dimension | Limited exposure | Moderate | |
| Sand and gravel | Abundant resources | Possible | High |
| Industrial sand | Extensive exposures | High | |
| Clay | Small known deposits | Very low | |
| Uranium and thorium | Unknown | Present | Unknown |
| Missouri, southwest | |||
| Tri-State zinc-lead | 5.3 million tons of ore | Present | Moderate |
| Dolomite, high purity | Good | Present | Good |
| Marble, dimension | Formations limited | High | |
| Siltstone, dimension | Formations limited | ||
| Carbonate rock | Extensive resources | Present | High |
| Sandstone, dimension | Known resources | Present | High |
| Sand and gravel | Low | Present | Very low |
| Industrial sand | Low | Possible | Unknown |
| Clay and shale | Low | Possible | Limited some |
| Oil shale | Minor | Possible | Nonexistent |
| Asphaltic sandstone | Good for near surface | Possible | Moderate |
| Oil, heavy | Some but limited | Low | |
| Gas | Probable but unknown | Limited to none | |
| Coal | Limited | Possible | Low |
| Missouri, Central | |||
| Barite, lead, zinc | Known, minor | Possible | Unknown |
| Iron | Low | None | |
| Magnetite, hematite | Unknown | Possible | Unknown |
| Metals, layered maficb | Unknown | Possible | Unknown |
| Limestone, high purity | Good | High | |
| Dolomite, high purity | Limited | Present | Speculative |
| Aggregate, high quality | Limited | Low | |
| Aggregate, crushed | Large | Present | High |
| Igneous & metamorphic | None | None | |
| Marble, dimension | Large | Low | |
| Sand and gravel | Good | Limited | Good |
| Industrial sand | Known, scattered | Speculative | |
| Fire clay | Major | Present | High |
| Coal | Large | Present | Favorable |
aIncludes zinc, silver, cobalt, nickel, cadmium, copper.
bMafic: dark minerals made up mainly of magnesian rock-forming silicates.
Source: Seeger (1997)
| Reserve estimates | |||
| Mineral commodity | Assessment area | National forests | Potential for discovery |
| Oil | Unknown, 6 fieldsa | Low to Moderate | |
| Natural gas | 20-51 trillion cubic feet | Moderate to high | |
| Coalbed methane | 5 trillion cubic feet | Low due to economics | |
| Coal | 5,896,260,000 tons | Moderate to high | |
| Migrabitumen | Unknown | Low | |
| Zinc, lead, copper | Unknownb | Very low | |
| Manganese | Unknown | Very low | |
| Vanadium | Unknown | Very low | |
| Limestone, aggregate | Almost unlimited | High | |
| Sandstone, aggregate | Almost unlimited | Yes | High |
| Chat, aggregate | 61,500,000 tons | Known sources | |
| Granite, aggregate | Unknown | Low | |
| Limestone, dimension | Unknown | Low | |
| Sandstone, dimension | Large reserves | Yes | High |
| Granite, dimension | Unknown | Low | |
| Sand and gravel | High | Moderate | |
| Tripoli | Unknown | Moderate | |
| Industrial sand | Unknown | Low | |
| Clay and shale | Unknown | Moderate | |
| Lime | Many known sources | High | |
| Bentonite, volcanic ash | Limited | Low |
aOil field: a region or area with known oil deposits.
bPast production.
Source: Suneson (1997)
| Development action | Private lands | National forest lands |
| Permitting and Construction Time | ||
| Obtain mine/mill permits circa 1970: | 2 or 3 years | Likely the same or slightly more |
| Obtain permits, new mine/mill 1997: | Minimum of 3 to 4 years | Minimum of 6 to 7 years |
| Construct shaft/surface plant 1997: | Minimum of 3 to 4 years | Likely the same |
| Total new mine/mill develop time: | 10 to 11 years | 13 to 15 years |
| Exploration, Development, and Construction Costs ($) | ||
| Cost to develop 2,500 tpd mine in 1960: | 3,200,000 (in 1997 dollars) | Likely the same |
| Cost to develop 5,000 tpd mine in 1967: | 14,400,000 (in 1997 dollars) | Likely the same |
| Cost to develop 5,000 tpd mine in 1973: | 21,600,000 (in 1997 dollars) | Likely the same or slightly more |
| Cost to develop 4,000 tpd mine in 1985: | 31,000,000 (in 1997 dollars) | Likely slightly more |
| Cost to duplicate a 1973 or 1985 mine in 1997: | 100,000,000 to 125,000,000 (in 1997 dollars) | Added costs to develop |
| Exploration cost in 1997: | 5,000,000 to 10,000,000 | Likely slightly more |
| Exploration cost for 300 ft. drillhole 1997: | 7,000 to 12,000 | Likely slightly more |
| Exploration cost for deep drillhole 1997: | 20,000 per 2000' deep hole | Likely slightly more |
| Capital costs for new ore deposit 1997: | 70,000,000 to 120,000,000 | Cost on forest will exceed private |
tpd=tons per day
Source: Seeger (1997)
| Operating activity | Size | Arkansas | Missouri | Oklahoma |
| Padsite for metals exploration drillhole | 100 feet x 100 feet area | x | ||
| Surface plant, metals mine-mill facility | approximately 40 acres | x | ||
| Tailings impoundment, metals mine | 200-300 acres | x | ||
| Underground metals mine acres | 200-400 underground acres | x | ||
| Gas well padsite, shallow | 1.5 to 2 acres | x | x | |
| Gas well padsite, deep | 6 to 8 acres | x | x | |
| Producing gas well site | 0.23 acres | x | x | |
| Quartz mine on National Forest | 0.25 to 5 acres | x | ||
| Quartz mine on private | 0.25 to 40 acres | x | ||
| Aggregate pit on national forest | 0.25 to 6 acres | x | ||
| Building stone sites on national forest | surface rock removal, minimal disturbance | x |
Source: Seeger (1997); USFS (1997)
Reclamation costs often are high. A case in point is the reclamation of bauxite (aluminum ore) mines south of Little Rock, AR, where previous mining operations affected several local streams. The Aluminum Company of America (Alcoa) and Reynolds Aluminum Company are working with State agencies to reclaim the mined lands and mitigate effects to the streams (Durham 1997, Harper 1997, Keith 1997, Williams 1997). As of 1997, the Reynolds Aluminum Co. had committed over $55 million for land reclamation projects that will mitigate effects to 1,200 ac in the Hurricane Creek drainage and Alcoa had obligated $20 million for water treatment, earth moving, and revegetation of 850 ac of company-owned tracts in the Hurricane Creek drainage (Durham 1997, Harper 1997, Keith 1997, Williams 1997).
A number of mineral commodities produced within the Assessment area enjoy national and international significance. This is particularly true for lead from the Missouri Ozark Mountains and Mark Twain National Forest and for quartz crystal, novaculite used for whetstones and abrasives, and high-quality electronic-grade quartz for fiber optics and other hi-tech materials from the Arkansas Ouachita Mountains and Ouachita National Forest. Other mineral commodities from the Assessment area— such as building stone, coal, and gas from eastern Oklahoma; fire clay and monument grade granite from Missouri; and tripoli and gas from Arkansas— are all marketed nationally as well as within the Assessment area.
Mineral collectors and “ rockhounds” from around the world come to the Assessment area specifically to explore for and collect unique mineral specimens. Local Chambers of Commerce and public information centers receive numerous inquiries and dispense many brochures and pamphlets catering to mineral resource hobby and educational interests. State geological agencies, the Forest Service, university geology departments, mineral organizations, and others provide and assist in mineral and geology theme tours within the Assessment area for schools, educational organizations like Elderhostel, and other professional and lay person groups. In 1995, the State of Oklahoma, recognizing the public interest in rockhounding, hosted a 3-day work-shop for rockhounds, which is described in some detail by Johnson and Suneson (1996). A number of Highlands businesses cater to these interests as well, further adding to the social legacy of the minerals within the Assessment area. Within the heart of the Ouachita Mountains of Arkansas, the communities of Mt. Ida, Hot Springs, and Jessieville alone have at least 24 shops specializing in gemstones and minerals and at least 10 different commercial mineral-digging locations.
Table 7.15 shows price trends for 19 of the nonenergy and energy minerals in the Highlands. With the exception of silver, which has declined in value, all mineral categories for which trend data are available have increased in price since 1987.
| Mineral commodity | Price Range 19871996 | 1987-1996 ($) per unit | 1996 price ($) |
| Coppera | Overall price increase | 0.82 to 1.39/lb. | 1.08/lb. |
| Iron orea | Relatively stable | 0.53 to 0.79/ton | 0.67/ton |
| Leada | Slight increase in price | 0.31 to 0.48/lb. | 0.48/lb. |
| Silvera | Price dropped steadily | 7.01 to 3.94/troy oz. | 5.30/troy oz. |
| Zinca | Slight increase in price | 0.41 to 0.82/lb. | 0.51/lb. |
| Nickela | Overall price increase | 2.19 to 6.09/lb. | 3.40/lb. |
| Cobalta | Significant price increase | 6.56 to 29.21/lb. | 26.00/lb. |
| Baritea | Overall price increase | 34.86 to 61.16/ton | 50.00/lb. |
| Cementa | Steady price increase | 49.10 to 70.00/ton | 70.00/ton |
| Limea | (reported for 1987-1992) | 49.96 to 51.70/ton | Not available |
| Sand and gravela | Steady price increase | 3.35 to 4.43/ton | 4.43/ton |
| Industrial sanda | Steady price increase | 13.00 to 17.86/ton | 17.56/ton |
| Stone, crushed brokena | Steady price increase | 4.37 to 5.43/ton | 5.43/ton |
| Gasb | Unknown | Not reported | 1.50 to 3.50/MCF |
| Coalb | Unknown | Not reported | 30/ton |
| Diamondb | Unknown | Not reported | 1 to 10/point |
| Quartz, crystalb | Unknown | Not reported | 10 to 100/lb. |
| Quartz, industrialb | Unknown | Not reported | 1 to 3/lb. |
| Nepheline syeniteb | Unknown | Not reported | 4 to 25/ton |
MCF=thousand cubic feet.
aInformation from Seeger (1997).
bInformation from Howard (1997).
Source: Seeger (1997; Howard (1997)
The annual per-capita consumption of all nonfuel (nonenergy) minerals in the United States totals nearly 22,000 pounds (table 7.16). In addition, the annual per-capita consumption of energy minerals is approximately18,000 pounds (USDI BM 1991). Mineral resources from the Assessment area end up in a wide variety of products and uses. From Missouri comes lead used in car batteries and the lining of hospital X-ray rooms. Arkansas provides quartz used in modern watches, computers, and the fiber optics that help doctors see into minute areas of a human body. Oklahoma coal generates power for 150,000 eastern Oklahoma homes. The Missouri Geological Survey report for this Assessment provides details on public consumption of Missouri minerals from within the Assessment area.
The Mining and Minerals Policy Act of 1970 (Public Law 91-631) declares that it is in the national interest for the Federal Government to stabilize domestic mining and mine reclamation industries. Twenty years later, in a report written at the request of the Federal government, the National Research Council warned of the declining competitiveness of the U.S. minerals and metals producing industry along with other domestic industries (NRC 1990). While the mineral industry periodically adjusts to changes in public policies and other influences, the public demand for products and goods from mineral resources has remained strong and in most cases has increased.
Imports and recycling of mineral commodities affect commodity production. Imports of minerals are due to either (1) the lack of the mineral resource in an area or (2) an imported mineral product being able to compete better economically with products produced locally. Inthe former case, the imported mineral helps make up a supply need for the product and may enhance employment. In the latter case, the imported mineral will likely have an adverse impact on domestic mineral commodity industries. The imported mineral will probably have a negative effect on domestic exploration and development for new mineral resource projects. United States imports of ever-greater tonnages of mineral resources noticeably affect local, regional, and national economies.
| Nonmetallic Minerals | Metallic Minerals |
| Nonfuel minerals consumed annually by Americansa | |
| Stone--9,700 pounds Sand and gravel--7,600 pounds Cement--724 pounds Clays--350 pounds Phosphate rock--383 pounds Salt--345 pounds Other nonmetals--1,300 pounds | Iron and steel--1,200 pounds Aluminum--42 pounds Copper--19 pounds Zinc--11 pounds Lead--11 pounds Manganese--6 pounds Other metals--18 pounds |
| Number of Americans supplied annually by Highlands nonfuel mineralsb | |
| Stone--24,919,085 Sand and gravel--5,332,846 Cement--27,035,912 Claysc--11,565,565 | Iron ore--608,333 Aluminumc--47,000 Copper--986,316 Zinc--8,363,636 Lead--58,000,000 |
aInformation from USBM and Seeger.
bInformation from Seeger.
cClays and aluminum calculated from USBM, Seeger, and Howard.
Source: USBM (1991); Seeger (1997); Howard (1997)
Within the Highlands are several very good examples of recycling. In 1996, the Missouri lead industry recycled over 100,000 tons of lead, primarily from vehicle batteries (Seeger 1997), representing over 10 percent of the recycled lead in the United States. Nationally, 970,000 tons of lead are recycled annually, which is 56 percent of the apparent consumption of lead in the United States. Since 1989, 53 to 62 percent of the lead consumed nationally has been from recycled lead processed in the Missouri portion of the Assessment area (Seeger 1997). Seeger discusses additional examples of recycling in the Missouri Highlands. In Arkansas, the aluminum and the vanadium industries actively recycle the minerals that they are known for internationally. In all three cases (lead, aluminum, and vanadium) these metals recycle through plants once used almost exclusively for processing newly mined materials.
The Assessment area boasts a wide range of geologically interesting sites and
natural attractions. Many of these are listed by counties in a matrix developed
specifically for the Assessment. A spreadsheet titled “ Geologic Interest
Sites Within the Assessment Area”
(available at the Assessment Web site, <www.fs.fed.us/oonf/ooha.welcome.htm>)
contains information on some of the most interesting geologic features. Features
include caves and unusual geologic formations, mineral-collecting localities,
and other historic mining and interpretive sites. Several communities within
the Assessment area have minerals-related theme celebrations. Others have museums
either wholly or partly
devoted to mineral exhibits and local mining histories contributing to the significance
of mineral resources in the Assessment area.
Recognizing the educational and scientific values associated with the mineral resources they are recovering, mining companies often contribute quality specimens to museums, schools, universities, and professional geological agencies and organizations across the country. High-quality mineral specimens from the Assessment area are displayed in the Smithsonian National Museum in Washington, DC, the National Mining Museum in Leadville, CO, the Natural History Museum of New York City, and other museums. At events surrounding his 1992 inauguration, President William J. Clinton presented guests with special commemorative mementos made by novaculite and quartz crystal companies in the Ouachita Mountains of his home State of Arkansas.
Assessment area mining companies have consistently contributed minerals to
the State geological agencies so that mineral kits can be prepared for school
children. In Arkansas alone, each year, geologists and schoolteachers distribute
over 40,000 of these kits composed of minerals donated by Arkansas mining companies.
Missouri mining companies contribute minerals specimens in a similar manner
there as well. Some Assessment area companies provide scholarships, help fund
research projects of various types, and contribute toward various community
events and human resource organizations (Seeger 1997). By opening their mines
to professional geologists, researchers, and students, these companies ensure
that a wealth of information is documented that might other-wise not be gathered
due to cost restraints. This critical
information pertains to the nature and occurrence of the ore deposits and to
our understanding of the geologic formations that house them within the Assessment
area. This kind of knowledge is important to the understanding of ore deposits
in general, improving chances of locating more deposits both within the Assessment
area and
elsewhere.
The Assessment area is a very important provider of mineral resources for local economies, the Nation and the world. The potential for discovery of additional mineral deposits on national forest land and elsewhere in the region ranges from low to high, depending on the resource. With increasing demand for some commodities, land managers will need to address the demand for additional access to explore for new mineral resources.
At 4.4 million ac, the Highlands' national forests comprise the largest land base within the Assessment area managed by one entity— the Forest Service. With known important mineral resources and the potential for new discoveries associated with them, opportunity exists to coordinate minerals program management and policy among the three national forests.
The opportunity also exists to identify and establish mineral resource potential zones, or target areas, on the Highlands national forests and to identify environmentally sensitive conditions or areas to be mitigated in anticipation of future exploration proposals within those zones.
The Ozark-Ouachita Highlands Assessment brought together three State geological agencies to compile important mineral resource information independent of State boundaries. Deposits of many minerals overlap two or more Assessment area States. Opportunity exists for the three State agencies to continue working together with the Forest Service in future joint projects within the Assessment area, including periodically updating the information gathered for this Assessment. By working together, the region's geologists can gain from shared expertise and better coordinated policy development and implementation.
Note: this is the references section for the entire Highlands Assessment not all of the works cited were used in this excerpt.
USDA Forest Service
Ouachita National Forest
Box 1270
Federal Building
Hot Springs, AR 71902
Phone: 501-321-5202
FAX: 501-321-5353
For any additional information, contact John C. Nichols
Forest Geologist for the Ouachita National Forest, at 501-321-5285.
USDA Forest Service - Ouachita National Forest
Last Modified: Monday, 12 May 2008 at 16:19:04 EDT