The Pershing Mine is a gold, manganese, and silver mine located in Saguache county, Colorado at an elevation of 9,619 feet.
About the MRDS Data:
All mine locations were obtained from the USGS Mineral Resources Data System. The locations and other information in this database have not been verified for accuracy. It should be assumed that all mines are on private property.
Mine Info
Elevation: 9,619 Feet (2,932 Meters)
Commodity: Gold, Manganese, Silver
Lat, Long: 38.24861, -106.10194
Map: View on Google Maps
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Pershing Mine MRDS details
Site Name
Primary: Pershing Mine
Secondary: Pershing Manganese Mine
Commodity
Primary: Gold
Primary: Manganese
Primary: Silver
Tertiary: Copper
Tertiary: Zinc
Location
State: Colorado
County: Saguache
District: Bonanza (Kerber Creek) District
Land Status
Land ownership: BLM Administrative Area
Note: the land ownership field only identifies whether the area the mine is in is generally on public lands like Forest Service or BLM land, or if it is in an area that is generally private property. It does not definitively identify property status, nor does it indicate claim status or whether an area is open to prospecting. Always respect private property.
Holdings
Not available
Workings
Type: Underground
Ownership
Owner Name: L And M Mining Co.
Home Office: Hillsboro, N.M.
Years: 1959 -
Production
Year: 1936
Year: 1935
Deposit
Record Type: Site
Operation Category: Past Producer
Operation Type: Unknown
Year Last Production: 1959
Discovery Method: Ore-Mineral In Place
Years of Production:
Organization:
Significant: N
Deposit Size: S
Physiography
General Physiographic Area: Rocky Mountain System
Physiographic Province: Southern Rocky Mountains
Mineral Deposit Model
Not available
Orebody
Form: TABULAR TO LENTICULAR
Structure
Type: R
Description: Sawatch Range, San Juan Volcanic Field, Rio Grande Rift
Type: L
Description: Bonanza Caldera, Bonanza Manganese Belt
Alterations
Alteration Type: L
Alteration Text: Early Barren Stage Of Alteration By Fumarolic Or Acid-Hot Spring Activity Resulted In Intense Silicification, Wallrock Replacement By Jasper And Alteration Products Hematite, Diaspore, Alunite, Barite, Zunyite, Rutile, And Kaolin Minerals. Later Mineralizing Stage By Alkaline Or Neutral Solutions Deposited Ore And Gangue And Caused Micaceous Alteration (Sericite And Chlorite) And Calcite, Quartz, And Pyrite.
Rocks
Name: Rhyolite
Role: Associated
Age Type: Host Rock
Age Young: Oligocene
Name: Rhyolite
Role: Associated
Age Type: Associated Rock
Age Young: Oligocene
Analytical Data
Analytical Data: SINTER TEST ON COM
Analytical Data: JIGGING AND TABLING TEST ON PLUS/MINUS 20-MESH CRUSHED MINE ORE GAVE MN DISTRIBUTION OF 53.5 % IN COMBINED JIG CONCENTRATE (34.2 WT % ASSAYING 41.0 % MN, 18.2 % INSOL, 7.4 % FE), 29.6 % IN COMBINED TABLE CONCENTRATE (17.3 WT % ASSAYING 44.8 % MN, 11.1 % INSOL, 7.7 % FE), 2.2 % IN COMBINED JIG TAILING (16.7 WT % ASSAYING 3.5 % MN, 86.1 % INSOL, 3.9 % FE), 6.4 % IN COMBINED TABLE TAILING (20.8 WT % ASSAYING 8.0 % MN, 74.9 % INSOL, 6.0 % FE), 8.3 % IN SLIME (11.0 WT % ASSAYING 19.8 % MN, 42.2 % INSOL, 12.4 % FE).
Analytical Data: DUMP SAMPLE ASSAYED 22.4 % MN, 44.4 % INSOL, 37.8 % S102, 9.2 % FE, 0.7 % CAO, 3.8 % AL203, 0.55 % ZN, 0.06 % P.
Analytical Data: USBM ORE-DRESSING TESTS INCLUDED MINE ORE SAMPLE ASSAYING 25.8 % MN, 44.0 % INSOL, 38.9 % S102, 6.7 % FE, 0.7 % CAO, 2.3 % AL203, 0.5 % ZN, 0.03 % P.
Analytical Data: ON UPPER LEVEL, TWO SAMPLES OVER WIDTHS OF 4 AND 9 FT ASSAYED 0.02 OZ/TON AU, 2.8 TO 7 OZ/TON AG, 19.6 TO 25.42% MN.
Analytical Data: ON EAST BRANCH OF LOWER LEVEL, NINE SAMPLES OVER WIDTHS OF 1 TO 5.2 FT ASSAYED 0.01 TO 0.37 OZ/TON AU, 1.0 TO 17.7 OZ/TON AG, 2.6 TO 32.9% MN.
Analytical Data: ON WEST BRANCH OF LOWER LEVEL, SIX SAMPLES FROM 1.9 TO 10 FT WIDE ASSAYED TRACE TO 0.7 OZ/TON AU, 0 TO 9.1 OZ/TON AG, 0 TO 10.45% MN.
Materials
Ore: Chalcopyrite
Ore: Wad
Ore: Manganite
Ore: Hausmannite
Ore: Pyrite
Ore: Psilomelane
Ore: Sphalerite
Ore: Pyrolusite
Gangue: Quartz
Gangue: Limonite
Comments
Comment (Production): PARTIAL PRODUCTION RECORD. ORE IN 1935-36 SHIPPED TO CF&I STEEL CORP., PUEBLO
Comment (Development): MINOR DEVELOPMENT DURING WORLD WAR 1 TO OBTAIN MN. OCCASIONAL PRODUCTION THRU 1950S.
Comment (Deposit): SHATTERED RAWLEY ANDESITE IS INTRUDED BY RHYOLITE AND QUARTZ LATITE DIKES. FISSURED ZONE IS SERIES OF PARALLEL QUARTZ-PYROLUSITE VEINS. PYROLUSITE OCCURS IN MASSIVE FORM, AS SHEARED GROUPS OF PRISMS, AND AS STRIATED CRYSTALS, POSSIBLY A REPLACEMENT AFTER MANGANITE. ALTHO MOST OF THE OXIDES ARE INTIMATELY INTERGROWN WITH QUARTZ, SOME NARROW, PRACTICALLY CLEAN SHOOTS HAVE BEEN FOUND.
Comment (Location): S-T-R, LAT-LONG, AND ELEV. TAKEN FROM BURBANK'S (1932) PLATE 1 (SCALE 1:12000). MINE OR CLAIM LIES AT HEAD OF MANGANESE GULCH 3.9 MILES SE OF BONANZA ; INFO FROM LAND.ST :(1976)
Comment (Workings): LOWER TUNNEL DRIVEN AT N12E FOR 414 FT. DRIFTS DRIVEN ON VEIN FOR 126 FT WEST AND 117 FT EAST. UPPER TUNNEL DRIVEN AT N5W FOR 153 FT. DRIFT DRIVEN ON VEIN FOR 180 FT. 20-FT WINZE CONNECTS UPPER TUNNEL WITH LOWER EAST BRANCH WORKINGS.
References
Reference (Deposit): PATTON, H.B., 1916, GEOLOGY AND ORE DEPOSITS OF THE BONANZA DISTRICT, SAGUACHE COUNTY, COLORADO: COLORADO GEOLOGICAL SURVEY BULL. 9, 136 P.
Reference (Deposit): BURBANK, W.S., 1932, GEOLOGY AND ORE DEPOSITS OF THE BONANZA MINING DISTRICT, COLORADO: USGS PROF. PAPER 169, 166 P.
Reference (Deposit): WELLS, R.R., AND OTHERS, 1952, BENEFICIATION OF OXIDE MANGANESE ORES FROM ARAPAHOE, DOUGLAS, SAGUACHE, CUSTER, CHAFFEE, AND PARK COUNTIES, COLO.: USBM R1-4845, P. 6-9
Reference (Production): COLO. DIV. MINES ANN. OPERATOR REPTS.
Colorado Mining Photos
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