Deposit ID | 10310702 |
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Record type | District |
Current site name | Colosseum Mine |
Alternate or previous names | Ivanpah Consolidated Mine |
Related records | 10159351 |
Geographic coordinates: | -115.56556, 35.57 (WGS84) |
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Elevation | 1800 |
Location accuracy | 100(meters) |
Relative position | 45 air miles S 20.13? W of Las Vegas, NV; 7 air miles N 11.29 ? W of Mountain Pass, CA (Mountain Pass is located at the junction of Interstate Hwy 15 and the Mountain Pass Rare Earths Mine road). |
(click for info) |
Country | State | County |
---|---|---|
United States | California | San Bernardino |
Meridian | Township | Range | Section | Fraction | State |
---|---|---|---|---|---|
San Bernardino | 017N | 013E | 10, 15 | California |
Commodity | Importance |
---|---|
Gold | Primary |
Silver | Primary |
Copper | Secondary |
Lead | Tertiary |
Arsenic | Tertiary |
Antimony | Tertiary |
Zinc | Tertiary |
Materials | Type of material |
---|---|
Gold | Ore |
Electrum | Ore |
Chalcopyrite | Ore |
Galena | Ore |
Silver | Ore |
Quartz | Gangue |
Pyrite | Gangue |
Siderite | Gangue |
Iron | Gangue |
Goethite | Gangue |
Sericite | Gangue |
Barite | Gangue |
Quartzite | Gangue |
Granite | Gangue |
Gneiss | Gangue |
Andesite | Gangue |
Granite | Gangue |
Gneiss | Gangue |
Quartzite | Gangue |
Shale | Gangue |
Dolomite | Gangue |
Host or associated | Host | ||
---|---|---|---|
Rock type | Volcanic Rock (Aphanitic) > Felsic Volcanic Rock | ||
Rock type qualifier | Felsite breccia | ||
|
Host or associated | Associated | ||
---|---|---|---|
Rock type | Metamorphic Rock > Gneiss | ||
|
Host or associated | Associated | ||
---|---|---|---|
Rock type | Metamorphic Rock > Schist | ||
|
Host or associated | Associated | ||
---|---|---|---|
Rock type | Sedimentary Rock | ||
|
Host or associated | Associated |
---|---|
Rock type | Volcanic Rock (Aphanitic) > Intermediate Volcanic Rock > Andesite |
Rock type qualifier | dikes |
(1) | -115.56556, 35.57 |
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General form | Pipe |
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Operation type | Surface-Underground |
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Development status | Past Producer |
Commodity type | Metallic |
Deposit size | Medium |
Significant | Yes |
Discovery year | 1865 |
District name | Clark District |
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Ownership category | BLM Administrative Area |
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Area name | BLM Needles Field Office |
Type | Owner |
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Owner | Lac Minerals, Ltd. (1993) |
Year | 1993 |
Type | Operator |
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Owner | Colosseum, Inc. (1993) |
Year | 1993 |
Beatty, R.L., 1989a, Bond Gold Colosseum Inc., crushing and grinding: an update: Society of Mining Engineers Preprint No. 89-85 for presentation at SME Annual Meeting, Las Vegas, NV Feb. 27 - Mar. 2, 1989, 6 pgs.
Beatty, R.L., 1989b, Crushing and grinding at Bond Gold's Colosseum mine: an update: Society for Mining, Metallurgy, and Exploration, Mining Engineering, August 1989, pgs. 823-826.
Britton, Vickie, 1986, Colosseum Mine plans to open: California Mining Journal, September 1986, pgs. 50-51.
Burchfiel, B.C. and Davis, G.A., 1988, Mesozoic thrust faults and Cenozoic lowangle normal faults, eastern Spring Mountains Nevada, and Clark Mountains thrust complex, California in This Extended Land: Geological journeys in the southern Basin and Range, Field Trip[ guidebook, Geological Society of America, Western Cordilleran Section, Las Vegas, Nevada, p. 8710.
California Polytechnic University - Pomona (CSU), site visited August 2006, Colosseum Mine in Ivanpah Mining District: CSU Geological Sciences Department, Pomona, http://geology.csupomona.edu/drjessey/fieldtrips/mtp/coloss.htm.
Davis, B.M., Trinble, J., and McClure, D., 1989, Grade control and ore selection practices at the Colosseum gold mine: Society for Mining, Metallurgy, and Exploration, Mining Engineering, August 1989, pgs. 827-830.
Dingwall, Laima, 1986, Aussie-made for N. America new Colosseum Gold Mines: Northern Miner, July 21, 1986.
Dobbs, P.H., 1961, Geology of the central part of the Clark Mountain range, San Bernardino County, California, Unpublished M.S. Thesis, University of Southern California, 116p.
Ely, Marion, 1982, Notice of reclamation plan completion, new Colosseum mine: Notice dated January 5, 1982, and submitted to the California Division of Mines and Geology; copy contained in CGS (formerly CDMG) Minefile Folder No. 322-5560.
Garside, L.J., and Bonham, H.F., Jr., 1987, Precious metal deposits in southeastern California and southern and west-central Nevada in Johnson, J.L., Ed., 1997, A Symposium on Bulk Mineable Precious Metal Deposits of the Western United States, Guidebook for Field Trips, Field Trip 2: Geological Society of Nevada, April 6-8, 1987, Symposium, Field Trip 2, pgs. 70-71.
Haxel, G. B., and Miller, D. M., 2006, Mesozoic rocks: Internet site, http://www2.nature.nps.gov/geology/USGSNPS/mojave/MESOmoja.pdf.
Hewett, D.F., 1956, Geology and mineral resources of the Ivanpah Quadrangle, California and Nevada: U. S. Geological Survey Professional Paper 275, 172 p.
Hill, R.L., 1998, Gold in the California desert, past, present, and future: California Division of Mines and Geology (aka California Geological Survey), California Geology, vol. 51, no. 1, pgs. 14-25.
http://www.epa.gov/epaoswer/other/mining/techdocs/gold.htm; Chapter 3: Site Visit Report: Colosseum Mine [PDF, 48 pages, 578 KB]; http://www.epa.gov/epaoswer/other/mining/techdocs/gold/goldch3.pdf.
McClure, D.L., and Schull, H.W., 1988, Colosseum Gold Mine, Clark Mountain range, San Bernardino County, California: Society of Mining Engineers Preprint Number 88119, SME Annual Meeting, Phoenix, AZ, 4p.
Mining Engineering, September 1987, US and International Mineral News Briefs, pg. 844.
Moyle, P.R., and Cather, E.E., 1992, Colosseum mine another new discovery in U.S. Bureau of Mines Open File Report 62-92, pgs. 38-43.
Portions of various unpublished reports, and information from various Internet websites, contained in CGS (formerly CDMG) Minefile Folder No. 322-5560.
Sharp, J.E., 1984, A gold mineralized breccia pipe complex in the Clark Mountains, San Bernardino County, California: Arizona Geological Society Digest, Vol. 15, pgs. 119-139.
Skillings Mining Review, Feb. 21, 1987, pg. 7.
Sunshine Mine Files, Colosseum Mine, Box #3, housed with CGS (formerly CDMG) Minefile Data.
Tucker, W.B. and Gowman, C.H., December 29, 1942, Field Report No. 371: State Mining Bureau in CGS Minefile Folder #322-5560.
U. S. Environmental Protection Agency, 2006, Technical Resource Document: Extraction and Beneficiation of Ores and Minerals: Gold
U.S. Environmental Protection Agency (EPA), 1992, Site Visit Report: Colosseum Mine: U.S. EPA, Office of Solid Waste, 401 M Street SW, Washington, DC 20460, 47 pgs.
Subject category | Comment text |
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Deposit | The Colosseum deposit is located at the southern end of the Sevier foreland thrust belt in the southern Basin and Range Province. Gold mineralization occurred about 100 Ma in earliest Late Cretaceous time (post-Sevier thrusting/pre-Basin and Range extensional tectonics), probably in association with one of several shallow-level, early Late Cretaceous stocks that appear to represent northeastern outliers of the magmatic belt that comprises the broadly calc-alkaline series of six plutons that comprise the Teutonia Batholith (Sharp, 1984; Haxel and Miller, 2006). The deposit is associated with emplacement of a breccia complex into Precambrian basement rocks. The complex is comprised of two felsite (also called "rhyolite" and "rhyolite felsite" by other authors) breccia pipes that form a northeast-southwest elongate complex, which contains mineralized zones of disseminated auriferous pyrite. Sub-economic gold mineralization occurs within mineralized veins in the Precambrian wallrock surrounding the breccia pipes, and in the Tapeats Quartzite and Bright Angel Shale that were situated above the present breccia pipes prior to westward displacement of the upper portions of the pipes as a result of tectonic movement along normal faults and gravity sliding along older thrust faults. As reported by Davis and others (1989), gold at the Colosseum deposit is generally submicroscopic and associated with sulfide mineralization, chiefly pyrite. It occurs as free gold, with minor alloyed silver. It is primarily in contact with pyrite in fractures in the pyrite or along pyrite grain edges. Secondarily, it occurs as isolated particles in quartz and other gangue minerals but spatially always close to pyrite, and rarely as particles encased in euhedral pyrite. |
Environment | The mine is surrounded by the Mojave National Preserve (MNP), administered by the National Park Service (NPS); the MNP is surrounded by BLM lands. The area around and including Clark Mountain to the south of the mine, is designated Wilderness managed by the NPS. |
Type | Date | Name | Affiliation | Comment |
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Reporter | 31-AUG-2006 | Hill, Robert L. | California Geological Survey CGS (Formerly CDMG) | |
Editor | 20-FEB-2008 | Schruben, Paul G. | U.S. Geological Survey | Converted from S&A FileMaker format to Oracle. Edit checks on rocks, units, and ages with Geolex search, and other fields. |