Douglas Group

The Douglas Group is a silver and gold mine located in Mineral county, Nevada.

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: Douglas Group
Secondary: Incluede Grassi, Mary, Hardluck, Orphan Boy, Juniper, Snowball, Gem,
Secondary: Pepper, Roosevelt, Little Chief, Bounce, Oriole, New Party Veins
Secondary: Gold Range District.

Commodity

Primary: Silver
Primary: Gold
Tertiary: Lead

Location

State: Nevada
County: Mineral
District: Silver Star 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

Not available

Ownership

Not available

Production

Not available

Deposit

Record Type: Site
Operation Category: Past Producer
Operation Type: Unknown
Discovery Year: 1893
Years of Production:
Organization:
Significant: N

Physiography

General Physiographic Area: Intermontane Plateaus
Physiographic Province: Basin And Range Province
Physiographic Section: Great Basin
Physiographic Detail: Excelsior Mountains

Mineral Deposit Model

Model Name: Epithermal vein, Comstock

Orebody

Form: LINEAR

Structure

Type: R
Description: Ne-Trending Faults

Type: L
Description: North-Northwest-Trending Fault System Folds

Alterations

Alteration Type: L
Alteration Text: Silicification, Argillization, Fe-Staining

Rocks

Name: Andesite
Role: Associated
Age Type: Associated Rock Unit
Age Young: Pliocene

Name: Andesite
Role: Associated
Age Type: Associated Rock
Age Young: Pliocene

Analytical Data

Not available

Materials

Ore: Galena
Ore: Tetrahedrite
Ore: Silver
Gangue: Calcite
Gangue: Quartz

Comments

Comment (Geology): THE VEINS HAVE CLEAN, SHARP CONTACTS WITH CLASTIC ROCKS OF THE DUNLAP AND EXCELSIOR FORMATIONS. THE VOLCANIC ROCKS TO THE EAST, CONTAINING FREE GOLD, ARE HYDROTHERMALLY ALTERED, CONTAIN QUARTZ MASSES AND ARE POSSIBLY POST-ESMERALDA IN AGE

Comment (Location): INFO FROM LAND.ST :(1972); 1:24000 QUADRANGLE IS A 1967) EDITION

Comment (Production): $500,000(1893-1903). TOTAL PRODUCTION ABOUT $2,000,000.

Comment (Development): MINING ACTIVITY CENTERED IN THE CAMPT DOUGLAS AREA BETWEEN 1893 AND 1903.

Comment (Deposit): EAST-TRENDING VEINS FROM A FRACTION OF AN INCH TO 13 FT THICK (BOUNCE, SNOW BALL, JUPITER MARY VEINS) IN ANOTHER TYPE (ROOSEVELT), FREE GOLD IS PRESENT IN CRUSHED, HYDROTHERMALLY ALTERED ANDESITIC ROCK.

Comment (Workings): NUMEROUS ADITS AND SHAFTS ON THE SEVERAL VEINS. PRINCIPAL DEVELOPMENT IS ON THEBOUNCE VEIN.

References

Reference (Production): ROSS, D.C., 1961, TABLE 6.7

Reference (Deposit): JARSIDE, L.J., 1979, GEOLOGY OF THE CAMP DOUGLAS QUADRANGLE, MINERAL COUNTY, NEVADA(UNPUB.): NBMG FILES

Reference (Deposit): FERGUSON, H.G., MULLER, S.W., AND CATHCART, S.H., 1954, GEOLOGIC MAP OF THE MINA QUADRANGLE, NEVADA: USGS GEOL. QUAD MAP SERIES, GQ 45.

Reference (Deposit): VANDERBURG, W.O., 1937, RECONNAISSANCE OF MINING DISTRICTS IN MINERAL COUNTY, NEVADA: U.S. BUREAU OF MINES INF. CIRC. 6941, 79P.

Reference (Deposit): HILL, J.M., 1915, SOME MINING DISTRICTS IN NORTHEASTERN CALIFORNIA AND NORTHWESTERN NEVADA: USGS BULL. 594.

Reference (Deposit): ROSS, D.C., 1961, GEOLOGY AND MINERAL DEPOSITS OF MINERAL COUNTY, NEVADA: NBMG BULL.58

Nevada Gold

Nevada has a total of 368 distinct gold districts. Of the of those, just 36 are major producers with production and/or reserves of over 1,000,000 ounces, 49 have production and/or reserves of over 100,000 ounces, with the rest having less than 100,000 ounces. Read more: Gold Districts of Nevada.