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U.S. Bureau of Mines Mineral Land Assessments

The following list contains all the Mineral Land Assessment (MLA) Open File Reports the U.S. Bureau of Mines conducted in Arizona. They fall into two groups: the early reports were done to assess mineral resources within and near U.S. Forest Service RARE II and BLM Wilderness Study areas; the later were part of a systematic assessment of the mineral resources within U.S. Forest Service lands in Arizona.

Data reported for the thousands of mines and prospects examined includes: property summaries, geologic setting, surveys of underground and/or surface workings, geologic maps, sample location information with associated mineralogic descriptions and resulting (often multi-element) assay results. Resource estimates and economic evaluations were made for selected properties.

Also included are reports assigned series numbers "93-X_ _ by the Arizona Department of Mines and Mineral Resources. These are the Abandoned Mine Land Inventory and Hazard Evaluation Handbook and Potential Environmental Hazards on Inactive/Abandoned Mine Lands of the Coronado National Forest volumes.

All the reports are in Adobe PDF format.

Index Map to Mineral Land Assessment Reports in Arizona
  • MLA 1-83 (1.6 MB)
    Mineral Investigation of the North End Roadless Area, Cochise County, Arizona: P.R. Bigsby, 1983.
  • MLA 1-89 (4 MB)
    Mineral Resources of the Black Mountains North (AZ-020-009) and Burns Spring (AZ-020-010) Wilderness Study Areas, Mohave County, Arizona: John T. Neubert, 1989.
  • MLA 1-94 (9.6 MB)
    Mineral Appraisal of Coronado National Forest, Part 8, Huachuca Mountains Unit, Cochise and Santa Cruz Counties, Arizona: Steven E. Tuftin and Robert G. Armstrong, 1994.
  • MLA 2-86 (3 MB)
    Mineral Resources of a Part of the Dos Cabezas Mountains Wilderness Study Area (AZ-040-065), Cochise County, Arizona: Jeanne E. Zelten, 1986.
  • MLA 2-89 (3.8 MB)
    Mineral Resources of the Mohave Wash Wilderness Study Area (AZ-050-007C/048/020-052), Mohave County, Arizona: John R. McDonnell, Jr., 1989.
  • MLA 2-94 (6 MB)
    Mineral Appraisal of Coronado National Forest, Part 11 Whetstone Mountains Unit, Cochise and Pima Counties, Arizona: Mark L. Chatman, 1994.
  • MLA 5-85 (.6 MB)
    Mineral investigation of the Black Rock Wilderness Study Area, Graham County, Arizona: G. S. Ryan, 1985.
  • MLA 5-88 (4.3 MB)
    Mineral Resources of the Wabayuma Peak Wilderness Study Area (AZ-020-037/043), Mohave County, Arizona: Mark L. Chatman, 1988.
  • MLA 5-92 (6.2 MB)
    Mineral Appraisal of the Kaibab National Forest, Arizona, A Summary Report: David, C. Scott, 1992.
  • MLA 6-92 (12 MB)
    Mineral Appraisal of the Kaibab National Forest, Arizona: David C. Scott, 1992.
  • MLA 7-88 (.74 MB)
    Mineral Investigation of the Sierra Estrella Wilderness Study Area (AZ-020-160), Maricopa County, Arizona: Stanley C. Scott, 1988.
  • MLA 8-84 (3.7 MB)
    Mineral investigation of the Pigeon Canyon, Snap Point, Nevershine Mesa, and Last Chance Wilderness Study Areas (BLM), Mohave County, Arizona: M. E. Lane, 1984.
  • MLA 8-93 (2.5 MB)
    Mineral Appraisal of the Coronado National Forest Part 1, Pinaleno-Greasewood Mountains Unit, Graham County, Arizona: S. Don Brown, 1993.
  • MLA 9-85 (.42 MB)
    Mineral Investigation of the Needle's Eye Wilderness Study Area, Gila County, Arizona: G. S. Ryan, 1985.
  • MLA 9-86 (.63 MB)
    Mineral Investigation of the Baboquivari Peak Wilderness Study Area (AZ-020-203B), Pima County, Arizona: John R. McDonnell, Jr., 1986.
  • MLA 9-88 (.61 MB)
    Mineral Investigation of the Mount Tipton Wilderness Study Area (AZ-020-012/042) and Proposed Additions, Mohave County, Arizona: Carl L. Almquist, 1988.
  • MLA 9-89 (2.5 MB)
    Mineral Investigation of a Part of the Planet Peak Wilderness Study Area (AZ-050-013), La Paz County, Arizona: Terry J. Kreidler, 1989.
  • MLA 10-84 (.74 MB)
    Mineral Investigation of the Virgin River Wilderness Study Area, Mohave County, Arizona: A. D. Harris and G. S. Ryan, 1984.
  • MLA 10-93 (1.1 MB)
    Mineral Appraisal of Coronado National Forest, PART 3 Winchester Mountains Unit, Cochise County, Arizona: Robert C. Armstrong and S. Don Brown, 1993.
  • MLA 10-94 (4 MB)
    Mineral Appraisal of Coronado National Forest, Part 14, Industrial Minerals: Robert C. Armstrong and Clay C. Martin, 1994.
  • MLA 11-88 (1.1 MB)
    Mineral Resources of a Part of the Muggins Mountains Wilderness Study Area (AZ-050-053A), Yuma County, Arizona: Robert H. Wood, II, 1988.
  • MLA 11-89 (.75 MB)
    Mineral Resources of a Part of the Kofa Unit 4 Northern Addition Wilderness Study Area (AZ-050-033), Yuma County, Arizona: Diann D. Gese, 1989.
  • MLA 11-92 (15.5 MB)
    Mineral Resource Appraisal of the Coconino National Forest, Arizona: Michael E. Lane, 1992.
  • MLA 11-94 (15.9 MB)
    Mineral Appraisal of Coronado National Forest, Santa Rita Mountains Unit, Pima and Santa Cruz Counties, Arizona: Staff, Resources Evaluation Branch, 1994.
  • MLA 12-89 (1.3 MB)
    Mineral Investigation of a Part of the Swansea Wilderness Study Area (AZ-050-O15A), La Paz and Mohave Counties, Arizona: George S. Ryan, 1989.
  • MLA 12-93 (8 MB)
    Mineral Appraisal of the Coronado National Forest Part 2, Chiricahua-Pedregosa Mountains Unit, Cochise County, Arizona: S. Don Brown, 1993.
  • MLA 13-89 (2.7 MB)
    Mineral Resources of a Part of the Rawhide Mountains Wilderness Study Area (AZ-020-058A), La Paz and Mohave Counties, Arizona: Steven E. Tuftin, 1989.
  • MLA 13-92 (6.8 MB)
    Mineral Resources of the West-Central Arizona and Southeastern California Detachment Terrane: Terry J. Kreidler, 1992.
  • MLA 13-92 Appendix D. (3.3 MB)
    Map and ovelays showing elemental distribtion of elements in the west central Arizona detachment terrain, Appendix D., Mineral Resources of the West-Central Arizona and Southeastern California Detachment Terrane: Terry J. Kreidler, 1992.
  • MLA 13-92 Sample Data (1.1 MB)
    Analytical data (dbf format, right click to download) for samples collected for Mineral Resources of the West-Central Arizona and Southeastern California Detachment Terrane: Terry J. Kreidler, 1992.
  • MLA 15-95 (8.7 MB)
    Mineral Appraisal of Priority Areas in the Western Part of Prescott National Forest, Arizona: J. T. Neubert, 1995.
  • MLA 17-85 (.45 MB)
    Mineral Investigation of the Fishooks Wilderness Study Area, Graham County, Arizona: G. S. Ryan, 1985.
  • MLA 18-89 (1.8 MB)
    Mineral Investigation of a Part of the Gibraltar Mountain Wilderness Study Area (AZ-050-012), La Paz County, Arizona: David C. Scott, 1989.
  • MLA 18-93 (2.3 MB)
    Mineral Appraisal of Coronado National Forest, Part 4, Peloncillo Mountains Unit, Cochise County, Arizona, Hidalgo County, New Mexico: Robert C. Armstrong, 1993.
  • MLA 20-89 (2.4 MB)
    Mineral Resources of a Part of the Trigo Mountains Wilderness Study Area (AZ-050-023B), La Paz County, Arizona: Robert H. Wood, II, 1989.
  • MLA 21-83 (4 MB)
    Mineral investigation of the Lime Hills, Narrows, and Sand Cove Wilderness Study Areas, Mohave County, Arizona: J. P. Briggs, 1983.
  • MLA 21-93 (2.7 MB)
    Mineral Appraisal of Coronado National Forest, Part 9, Galiuro Mountains Unit, Graham County, Arizona: S. Don Brown, 1993.
  • MLA 22-85 (3.6 MB)
    Mineral Investigation of the Arrastra Mountain Wilderness Study Area, La Paz, Mohave, and Yavapai Counties, and Peoples Canyon Wilderness Study Area, Yavapai County, Arizona: M. E. Lane, 1985.
  • MLA 22-94 (30 MB)
    Mineral Appraisal of Coronado National Forest, Part 7, Patagonia Mountains-Canelo Hills Unit, Cochise and Santa Cruz Counties, Arizona: Mark L. Chatman, 1994.
  • MLA 23-89 (1.1 MB)
    Mineral Investigation of the White Canyon Study Area, Pinal County, Arizona: David C. Scott and John R. McDonnell, Jr., 1989.
  • MLA 23-94 (6.6 MB) Mineral Appraisal of Coronado National Forest, Part 15, Executive Summary: Mark L. Chatman, 1994.
  • MLA 24-94 (23 MB)
    Mineral Appraisal of Coronado National Forest, Part 13 Atascosa-Pajarito-San Luis-Tumacacori Mountains Unit, Pima and Santa Cruz Counties, Arizona: Staff, U.S. Bureau of Mines, 1994.
  • MLA 25-88 (2.1 MB)
    Mineral Investigation of additional parts of the Arrastra Mountain study area (AZ-020-059), La Paz, Mohave, and Yavapai Counties, Arizona: Michael E. Lane, 1988.
  • MLA 25-94 (14.9 MB)
    Mineral Appraisal of Coronado National Forest, Part 5 Santa Catalina-Rincon Mountains Unit, Cochise, Pima and Pinal Counties, Arizona: Staff, U.S. Bureau of Mines, 1994.
  • MLA 26-93 (3.2 MB)
    Mineral Appraisal of Coronado National Forest, Part 10, Santa Teresa Mountains Unit, Graham County, Arizona: S. Don Brown, 1993.
  • MLA 27-84 (3.3 MB)
    Mineral Investigation of the Starvation Point Wilderness Study Area, Mohave County, Arizona: A. Harris and G. Ryan, 1984.
  • MLA 29-88 (2.2 MB)
    Mineral Resources of a Part of the Harcuvar Mountains Wilderness Study Area (AZ-020-075), La Paz County, Arizona: Steven E. Tuftin, 1988.
  • MLA 30-82 (.78 MB)
    Mineral Resources of the Emmett Wash Wilderness Study Area, Coconino County, Arizona: M. E. Lane, 1982.
  • MLA 30-93 (18.5 MB)
    Mineral Appraisal of Coronado National Forest, Part 6 Dragoon Mountains Unit, Cochise County, Arizona: Mark L. Chatman, 1993.
  • MLA 31-81 (3.7 MB)
    Mineral-Resource Potential of the Arnold Mesa Rare II Further Planning Area, Yavapai County, Arizona: R. A. McColly and S. L. Korzeb, 1981.
  • MLA 31-84 (.85 MB)
    Mineral Investigation of Mount Trumbull Wilderness Study Area, Mohave County, Arizona: J. R. McDonnell, Jr., 1984.
  • MLA 34-85 (11.8 MB)
    Mineral Investigation of the Sierra Ancha Wilderness and Salome Study Area, Gila County, Arizona: Thomas D. Light, 1985.
  • MLA 34-87 (2.2 MB)
    Mineral Resources of the Coyote Mountains Wilderness Study Area (AZ-020-202), Pima County, Arizona: William Lundy, 1987.
  • MLA 35-82 (2 MB)
    Mineral-Resource Potential of the Dragoon Mountains Rare II Further Planning Area, Cochise County, Arizona: T. J. Kreidler, 1982.
  • MLA 35-88 (2.2 MB)
    Mineral Investigation of a Part of the Mount Nutt Wilderness Study Area (AZ-020-024), Mohave County, Arizona: Carl L. Almquist, 1988.
  • MLA 37-84 (1 MB)
    Mineral Investigation of the Hack Canyon Wilderness Study Area, Mohave County, Arizona: J. R. McDonnell, Jr., 1984.
  • MLA 38-88 (4.2 MB)
    Mineral Resources of the Aravaipa Study Area, Graham and Pinal Counties, Arizona: David C. Scott, 1988.
  • MLA 39-88 (1.8 MB)
    Mineral Resources of the Aubrey Peak Wilderness Study Area (AZ-020-054), Mohave County, Arizona: Michael E. Lane, 1988.
  • MLA 43-85 (6.2 MB)
    Mineral Resources of the Harquahala Mountains Study Area (AZ-020-095), La Paz and Maricopa Counties, Arizona: John R. Thompson, 1985.
  • MLA 43-86 (1.6 MB)
    Mineral Investigation of a Part of the Canaan Mountain Wilderness Study Area, Kane and Washington Counties, Utah (UT-040-143) and Mohave County, Arizona (AZ-010-041) Terry J. Kreidler, 1986.
  • MLA 43-88 (1.7 MB)
    Mineral Investigation of the Muleshoe Study Area, Cochise and Graham Counties, Arizona: John R. Thompson, 1988.
  • MLA 44-85 (1.9 MB)
    Mineral Resources of the Big Horn Mountains Wilderness Study Area (AZ-020-099), Maricopa County, Arizona: Russell A. Schreiner, 1985.
  • MLA 45-86 (6.2 MB)
    Mineral Investigation of a Part of the Eagletail Mountains Wilderness Study Area (AZ-020-128), La Paz, Maricopa, and Yuma Counties, Arizona: Michael E. Lane, 1986.
  • MLA 46-86 (1.8 MB)
    Mineral Investigation of a Part of the Woolsey Peak Wilderness Study Area (AZ-020-142/144), Maricopa County, Arizona: John R. McDonnell, Jr., 1986.
  • MLA 48-88 (4.2 MB)
    Mineral Resources of the Warm Springs Wilderness Study Area (AZ-020-028/029), Mohave County, Arizona: Staley L. Korzeb, 1988.
  • MLA 50-85 (.32 MB)
    Mineral Investigation of the Chemehuevi-Needles Wilderness Study Area (AZ-050-004), San Bernardino County, California: Michael E. Lane, 1985.
  • MLA 51-85 (5.9 MB)
    Mineral Resources of the Lower Burro Creek Wilderness Study Area (AZ-020-060), Mohave and Yavapai Counties, Arizona: Russell A. Shreiner, 1985.
  • MLA 54-86 (.8 MB)
    Mineral Investigation of a Part of the Table Top Mountains Wilderness Study Area (AZ-020-172), Pinal and Maricopa Counties, Arizona: John R. Mcdonnell, Jr., 1986.
  • MLA 56-82 (7.5 MB)
    Mineral Resource Potential of Mazatzal Wilderness and Contiguous Rare II Further Planning Area, Gila, Maricopa, and Yavapai Counties, Arizona: C. E. Ellis, 1982.
  • MLA 57-86 (1.7 MB)
    Mineral Investigation of a Part of the New Water Mountains Wilderness Study Area (AZ-020-125), La Paz County, Arizona: Michael E. Lane, 1986.
  • MLA 62-86 (.5 MB)
    Mineral Investigation of a Part of the Signal Mountain Wilderness Study Area (AZ-020-138), Maricopa County, Arizona: Terry J. Kreidler, 1986.
  • MLA 63-82 (3.6 MB)
    Mineral-resource potential of the Paria Plateau Wilderness Study Area, Coconino County, Arizona: Michael E. Lane, 1982.
  • MLA 64-86 (1.3 MB)
    Mineral Investigation of a Part of the Cactus Plain Wilderness Study Area (AZ-050-014A/B), La Paz County, Arizona: Terry J. Kreidler, 1986.
  • MLA 66-86 (.9 MB)
    Mineral Investigation of the Mount Wilson Wilderness Study Area (AZ-020-001A), Mohave County, Arizona: George S. Ryan, 1986.
  • MLA 80-87 (1 MB)
    Mineral Investigation of the Ragged Top Wilderness Study Area (AZ-020-197), Pima County, Arizona: Terry J. Kreidler, 1987.
  • MLA 81-87 (1.3 MB)
    Mineral Investigation of the East Cactus Plain Wilderness Study Area (AZ-050-017), La Paz County, Arizona: Terry J. Kreidler, 1987.
  • MLA 82-83 (13 MB)
    Mineral investigation of a Crossman Peak Wilderness Study Area, Mohave County, Arizona: T. D. Light and J. R. McDonnell, Jr., 1983.
  • MLA 93-X_01 (8.9 MB)
    Abandoned Mine Land Inventory and Hazard Evaluation Handbook: Staff, U.S. Bureau of Mines, 1993.
  • MLA 93-X_02 (1.4 MB)
    Potential Environmental Hazards on Inactive/Abandoned Mine Lands, Coronado National Forest, Southeast Arizona: U.S. Bureau of Mines, 1993.
  • MLA 93-XE1.2 (16.9 MB)
    Appendix E, vol. 1 of 2, to supplement Potential Environmental Hazards on Inactive/Abandoned Mine Lands, Coronado National Forest, Southeast Arizona: U.S. Bureau of Mines, 1993.
  • MLA 93-XE2.2 (24.7 MB)
    Appendix E, vol. 2 of 2, to supplement Potential Environmental Hazards on Inactive/Abandoned Mine Lands, Coronado National Forest, Southeast Arizona: U.S. Bureau of Mines, 1993.
  • MLA 118-82 (.8 MB)
    Mineral Investigation of the Pusch Ridge Wilderness, Pima County, Arizona: G. S. Ryan, 1982.
  • MLA 129-82 (2.3 MB)
    Mineral investigation of the Whetstone Roadless Area, Cochise and Pima Counties, Arizona: R. A. McColly and D. C. Scott, 1982.
  • MLA 133-82 (.3 MB)
    Mineral investigation of the Rattlesnake Roadless Area, Coconino and Yavapai Counties, Arizona: R. A. McColly, 1983.
  • MLA 134-82 (.2 MB)
    Mineral Investigation of the Wet Beaver Creek Rare II Further Planning Area, Coconino and Yavapai Counties, Arizona: A. M. Bielski, 1982.
  • MLA 136-82 (5.8 MB)
    Mineral Investigation of the Superstition Wilderness and Contiguous Rare II Further Planning Areas, Gila, Maricopa, and Pinal Counties, Arizona: J. E. Jinks, 1982.
  • MLA 137-82 (3.1 MB)
    Mineral Investigation of the Hells Hole Roadless Area, Greenlee County and Grant County, New Mexico: J. P. Briggs, 1982.
  • MLA 139-82 (2.7 MB)
    Mineral Investigation of the Hells Gate Roadless Area, Gila County, Arizona: R. A. McColly, 1982.

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