C. H. C. Group

The C. H. C. Group is a silver, lead, and zinc mine located in Dolores county, Colorado at an elevation of 9,459 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

Satelite View

MRDS mine locations are often very general, and in some cases are incorrect. Some mine remains have been covered or removed by modern industrial activity or by development of things like housing. The satellite view offers a quick glimpse as to whether the MRDS location corresponds to visible mine remains.

Site Name

Primary: C. H. C. Group
Secondary: Princeton Mine
Secondary: Patented Claims: C. H. C., MS 1040
Secondary: Princeton, MS 2258
Secondary: Crebec, MS 6130
Secondary: Limestone, MS 6131
Secondary: Ethlena, MS 6136

Commodity

Primary: Silver
Primary: Lead
Primary: Zinc
Tertiary: Sulfur-Pyrite

Location

State: Colorado
County: Dolores
District: Pioneer (Rico) District

Land Status

Land ownership: National Forest
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.
Administrative Organization: San Juan N. F.

Holdings

Not available

Workings

Not available

Ownership

Not available

Production

Not available

Deposit

Record Type: Site
Operation Category: Past Producer
Operation Type: Unknown
Discovery Year: 1879
Discovery Method: Ore-Mineral In Place
Years of Production:
Organization:
Significant: N
Deposit Size: S

Physiography

General Physiographic Area: Intermontane Plateaus
Physiographic Province: Colorado Plateaus
Physiographic Section: Canyon Lands

Mineral Deposit Model

Model Name: Polymetallic replacement

Orebody

Form: TABULAR, LENTICULAR

Structure

Type: R
Description: San Juan Uplift, Paradox Basin

Type: L
Description: Rico Dome, Blackhawk Fault, Princeton Fault

Alterations

Alteration Type: L
Alteration Text: Oxidation Of Sulfide Ores

Rocks

Name: Latite
Role: Associated
Age Type: Associated Rock
Age Young: Paleocene

Name: Latite
Role: Associated
Age Type: Host Rock
Age Young: Pennsylvanian

Name: Latite
Role: Associated
Age Type: Associated Rock Unit
Age Young: Paleocene

Name: Latite
Role: Associated
Age Type: Host Rock Unit
Age Young: Pennsylvanian

Analytical Data

Not available

Materials

Ore: Limonite
Ore: Sphalerite
Ore: Pyrite
Gangue: Fluorite
Gangue: Quartz

Comments

Comment (Deposit): GENERALLY SOUTH-DIPPING HERMOSA FM LIMESTONE, SANDSTONE, AND SHALE COVERED BY EXTENSIVE LANDSLIDES BUT BELOW ARE CUT BY NW-TRENDING BLACKHAWK FAULT, DOWNTHROWN ON NE. NEAR CREBEC SHAFT, SW-DIPPING BLANKET REPLACEMENTS REST ON HARD, FINE-GRAINED SHATTERED SANDSTONE AND OVERLAIN BY SHATTERED GRAY SHALE. BLANKET COMPOSITION VARIES FROM (1) 4-FT-THICK MASS OF CELLULAR OR LOOSELY COHERING LIMONISTE WITH FRAGMENTS OF SANDSTONE AND ALTERED LIMESTONE TO (2) YELLOW, CLAYEY MATERIAL CONTAINING STREAK OF ARGENTIFEROUS OCHEROUS MATERIAL AND UPPER BAND OF PB SULFATE. MASSIVE PYRITE LENSES OCCUR IN SERVERAL SANDSTONE AND SHALE HORIZONS ABOVE BLANKET, SOME SEPARATED BY SEVERAL INCHES OF CRUSHED SHALE. ONE LARGE MASS OVER 40 FT THICK OCCURRED 50 FT ABOVE MAIN BLANKET AND CONSISTED OF THREE FLAT BODIES SEPARATED BY SHALE LAYERS.

Comment (Workings): CHC SHAFT INACCESSIBLE, DEPTH UNKNOWN; CHC TUNNEL LOCATED ABOUT 100 FT DOWN HILL AND DRIVEN GENERALLY EAST. EXTENT UNKNOWN. EXTENT UNKNOWN FOR LIMESTONE TUNNEL. CREBEC SHAFT 265 FT DEEP. PRINCETON TUNNEL DRIVEN N 61 E FOR ABOUT 400 FT, WITH AT LEAST ONE DRIFT SE TO CREBEC SHAFT.

Comment (Location): (LAND STATUS AND ADMINISTRATIVE AREA LOCATIONS CALCULATED USING GIS OVERLAY ANALYSIS FOR SAN JUAN N. F.). ON WEST SLOPE OF CHC HILL (UNSURVEYED SECTION). ELEV AND LAT-LONG GIVEN ARE FOR C.H.C. ADIT AND ARE FROM MCKNIGHT, 1974, PL.1 (1930 BASE). ; INFO FROM LAND.ST :1975

Comment (Development): CARPENTER LOCATED CLAIM ON WEST SLOPE OF HILL BUT ATTEMPT TO SINK SHAFT WAS UNSUCCESSFUL DUE TO MOVEMENT OF LANDSLIDE. RELOCATED SITE PROVED SUCCESSFUL AND C.H.C. BECAME ONE OF FIRST PRODUCERS IN AREA.

References

Reference (Deposit): MCKNIGHT, E.T., 1974, GEOLOGY AND ORE DEPOSITS OF THE RICO DISTRICT, COLORADO: USGS PROF. PAPER 723.

Reference (Deposit): PRATT, W.P., AND OTHERS, 1969, GEOLOGIC MAP OF THE RICO QUADRANGLE, DOLORES AND MONTEZUMA COUNTIES, COLORADO: USGS MAP GQ-797.

Reference (Deposit): RANSOME, F.L., 1901, THE ORE DEPOSITS OF THE RICO MOUNTAINS, COLORADO: USGS 22D ANN. REPT., PT. 2, P. 388-390.

Reference (Deposit): CROSS, WHITMAN, AND RANSOME, F.L., 1905, DESCRIPTION OF THE RICO QUADRANGLE: USGS FOLIO 130.

Reference (Deposit): BLM MINERAL SURVEYS MS 1040, 2258, 6130, 6131, 6136

Colorado Mining Photos

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