Moss Mine

  

Mine Info

State: Arizona

County: Mohave

Elevation: 2,159 feet (658 meters)

Primary Mineral: Gold

Lat, Long: 35.09972, -114.44667



Mine Description

The Moss mine is about 7 miles northwest of Oatman and 2 miles north of Silver Creek.

This deposit was probably the first to be worked in the district. During the early days, it made a reported production of $240,000 from near the surface. Since that time, considerable intermittent development has been carried on, but little ore has been mined.

The vein strikes N. 78° W., dips 70° S., and occurs in the Moss quartz monzonite-porphyry. It forms a lode from 20 to more than 100 feet wide, with the widest portion at the western end, and is traceable on the surface for more than a mile east of the mine.

The vein filling consists of fine-grained white quartz and calcite, with stringers of colorless to pale-green fluorite. The largest ore shoot consisted of free gold in iron-stained quartz but extended to a depth of only 65 feet. Several smaller ore bodies were mined from near the surface at various places along the vein.

Workings on the Moss vein include a 230-foot shaft with about 750 feet of workings, about 900 feet of tunnel, and some irregular surface openings. Ransome states that the vein on the 220 level appears to be 90 feet wide and as a whole probably carries from 0.15 to 0.20 ounces of gold per ton.

Source: Arizona Lode Gold Mines and Gold Mining, Bulletin137, Arizona Bureau of Mines. Revised 1967

Moss Mine MRDS details

Site Name

Commodity

Location

Primary: "Moss Mine"
Primary: Gold
Secondary: Silver
Tertiary: Fluorine-Fluorite
Tertiary: Copper
State: Arizona
County: Mohave
District: San Francisco District
 

Land Status

Holdings

Workings

Land ownership: BLM Administrative Area
Administrative Organization:
Type: Underground


Ownership

Production

Deposit

Record Type: Site
Operation Category: Past Producer
Deposit Type:
Plant Type:
Plant Subtype:
Operation Type: Unknown
Mining Method:
Milling Method:
Year First Production: 1864
Year Last Production: 1909
Discovery Year: 1864
Discovery Method: Ore-Mineral In Place
Years of Production:
Organization:
Significant: Y
Deposit Size: S


Physiography

Mineral Deposit Model

Orebody

General Physiographic Area: Intermontane Plateaus
Physiographic Province: Basin And Range Province
Physiographic Section: Mexican Highland
Physiographic Detail:
Name:
Form: LODE


Structure

Alterations

Rocks

Type: R
Structure:
Description: Nnw To Wnw Trending Vein And Fault System In Tert Volcanic Rocks
Alteration Type: L
Alteration:
Alteration Text: Oxidation
Name: Trachyte
Role: Associated
Description:
Age Type: Associated Rock
Age in Years:
Dating Method:
Material Analyzed:
Age Young: Pliocene
Age Old:
Name: Trachyte
Role: Associated
Description:
Age Type: Host Rock
Age in Years:
Dating Method:
Material Analyzed:
Age Young: Pliocene
Age Old:


Analytical Data

Materials

Analytical Data : VEIN AT 220-FOOT LEVEL, 90 FEET WIDE, CARRIES 0.15 TO 0.2 OZ. AU/TON.
Ore: Chrysocolla
Ore: Chalcocite
Ore: Gold
Ore: Marcasite
Ore: Chalcopyrite
Ore: Wulfenite
Ore: Pyrite
Gangue: Hematite
Gangue: Calcite


Comments

Comment Type:
Deposit
Comment ONE ORE SHOOT CONTAINED FREE GOLD AND WAS EXCEPTIONALLY RICH ORE. THIS SHOOT EXTENDED DOWN FROM THE SURFACE TO A DEPTH OF 65 FEET. OTHER SMALLER ORE BODIES WERE FOUND FROM NEAR THE SURFACE TO DEPTHS OF 220 FEET AT VARIOUS PLACES ALONG THE VEIN.
Comment Type:
Commodity
Comment DISTRICT ALSO HAS SMALL AMOUNT OF CHALCOPYRITE, CHALCOCITE, PYRITE, CHRYSOCOLLA, RED PB OXIDES, AND WULFENITE.


References

Reference Category:
Deposit
Pages:
Reference: SCHRADER, F.C., 1909, MINERAL DEPOSITS OF THE CERBAT RANGE, BLACK MOUNTAINS, AND THE GRAND WASH CLIFFS, MOHAVE COUNTY, ARIZONA: U.S.G.S. BULL. 397, P. 170.
URL:
Reference Category:
Deposit
Pages:
Reference: WILSON, E.D., 1934, ARIZONA LODE GOLD MINES AND GOLD MINING: ARIZONA BUREAU OF MINES BULLETIN 137, P. 94.
URL:
Reference Category:
Deposit
Pages:
Reference: LAUSEN, C., 1931, GEOLOGY AND ORE DEPOSITS OF THE OATMAN AND KATHERINE DISTRICTS, ARIZONA: ARIZONA BUREAU OF MINES BULLETIN 131, P. 113.
URL:
Reference Category:
Deposit
Pages:
Reference: NIEMUTH, N.J., 1987, ARIZONA MINERAL DEVELOPMENT 1984-1986: ARIZONA DEPARTMENT OF MINES AND MINERAL RESOURCES DIRECTORY 29, 46 P.
URL:
Reference Category:
Deposit
Pages:
Reference: PHILLIPS, K.A., 1987, ARIZONA INDUSTRIAL MINERALS: ARIZONA DEPARTMENT OF MINES AND MINERAL RESOURCES MINERAL REPORT 4, 185 P.
URL:
Reference Category:
Deposit
Pages:
Reference: SAWYER, M.B., GURMENDI, A.C., DALEY, M.R., AND HOWELL, S.B., 1992, PRINCIPAL DEPOSITS OF STRATEGIC AND CRITICAL MINERALS IN ARIZONA: U.S. BUREAU OF MINES SPECIAL PUBLICATION, 334 P.
URL:
Reference Category:
Other Database
Pages:
Reference: CIMRI
URL:
Reference Category:
Production
Pages:
Reference: U.S.G.S. BULL. 397, P. 170.
URL:
Reference Category:
Reserve-Resource
Pages:
Reference: NIEMUTH, 1987.
URL:

Did You Know.......

A mine is a hole in the ground, owned by a liar.
-Mark Twain

About The MRDS Mines Database

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.

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