Alma Deposit

The Alma Deposit is a mica and beryllium mine located in Rio Arriba county, New Mexico at an elevation of 8,399 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: Alma Deposit
Secondary: Kansas City

Commodity

Primary: Mica
Primary: Beryllium
Tertiary: Thorium
Tertiary: REE
Tertiary: Uranium
Tertiary: Feldspar

Location

State: New Mexico
County: Rio Arriba
District: Petaca District: Persimmon Peak-Las Tablas Group

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.

Holdings

Not available

Workings

Not available

Ownership

Owner Name: Cooperative Mines, Inc.
Home Office: La Madera, N.M.

Production

Year: 1943
Time Period: 1943
Description: Cp_Grade: ^1,265 Lbs Of Beryl
Year: 1943
Time Period: 1900-1943
Description: Cp_Grade: ^500 Lbs Plate Mica, 93 Tons Scrap Mica

Deposit

Record Type: Site
Operation Category: Past Producer
Operation Type: Unknown
Year First Production: 1900
Year Last Production: 1943
Discovery Year: 1900
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: OTHER SILL

Structure

Type: L
Description: A Ne (?) Trending Fault Approximately 250 Ft North Of The Pegmatite.

Alterations

Not available

Rocks

Name: Pegmatite
Role: Associated
Age Type: Host Rock Unit
Age Young: Neoproterozoic

Name: Pegmatite
Role: Associated
Age Type: Host Rock
Age Young: Neoproterozoic

Name: Pegmatite
Role: Associated
Age Type: Associated Rock
Age Young: Neoproterozoic

Analytical Data

Not available

Materials

Ore: Beryl
Ore: Mica
Ore: Columbite
Ore: Microcline
Ore: Monazite
Gangue: Quartz
Gangue: Garnet
Gangue: Fluorite

Comments

Comment (Workings): WORKINGS CONSIST OF A LARGE OPEN CUT 5 TO 15 FT DEEP, 185 FT LONG, AND 45 FT WIDE, A 38 FOOT LONG CROSSCUT, AND A 30 FT RAISE. SEVERAL PROSPECT PITS AND TRENCHES ARE ALSO PRESENT.

Comment (Geology): THE MAIN PEGMATITE IS NOT SHARPLY ZONED. THE DEPOSIT OCCURS IN THE PETACA SCHIST MEMBER OF THE ORTEGA QUARTZITE

Comment (Deposit): SEE ALSO: PERSIMMON PEAK-LAS TABLAS GROUP ; INFO.SRC : 1 PUB LIT; 2 UNPUB REPT

Comment (Location): LOCATION ESTIMATED FROM LOCATION MAP OF JAHNS (1946). ; INFO FROM LAND.ST :1979

Comment (Deposit): THIS PEGMATITE IS THE LARGEST IN THE PERSIMMON PEAK-LAS TABLAS GROUP.

References

Reference (Production): JAHNS, R.H., 1946, NMBMMR BULL. NO. 25

Reference (Deposit): NMBMMR GENERAL FILE DATA

Reference (Deposit): REDMON, D.E., 1961, USBM IC 8013, P. 18

Reference (Deposit): JAHNS, R.H., 1946, NMBMMR BULL. NO. 25, P. 125-128

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