Hillside-Sierra Group

The Hillside-Sierra Group is a manganese mine located in Sierra county, New Mexico at an elevation of 5,210 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

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Site Name

Primary: Hillside-Sierra Group
Secondary: Claims: Sierra Nos. 1 To 8
Secondary: Hillside Nos. 1 To 4

Commodity

Primary: Manganese

Location

State: New Mexico
County: Sierra
District: Sierra Caballos 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: Surface/Underground

Ownership

Owner Name: Sierra Mining Co.
Home Office: Albuquerque, N.M.
Years: 1958 -

Production

Not available

Deposit

Record Type: Site
Operation Category: Past Producer
Operation Type: Unknown
Year First Production: 1943
Year Last Production: 1952
Discovery Method: Ore-Mineral In Place
Years of Production:
Organization:
Significant: N
Deposit Size: S

Physiography

General Physiographic Area: Intermontane Plateaus
Physiographic Province: Basin And Range Province
Physiographic Section: Mexican Highland

Mineral Deposit Model

Not available

Orebody

Form: PODS

Structure

Not available

Alterations

Alteration Type: L
Alteration Text: Silicified Limestone

Rocks

Name: Limestone
Role: Host
Age Type: Host Rock
Age Young: Late Ordovician

Analytical Data

Not available

Materials

Ore: Wad
Ore: Psilomelane
Ore: Pyrolusite
Gangue: Calcite

Comments

Comment (Location): LOCATED ON THE SOUTHWEST FLANK OF THE CABALLO MOUNTAINS NEAR THE BASE OF THE ESCARPMENT.

Comment (Production): 86.5 LONG TONS OF SORTED ORE AVERAGING 18.9 % MN WAS PRODUCED DURING 1952-1953; 12 TONS OF 31.3 % MN AND 18 TONS OF UNKNOWN GRADE WERE REPORTEDLY PRODUCED IN 1943.

Comment (Deposit): DEPOSITS OCCUR AS SMALL PODS, IRREGULAR MASSES, STRINGERS AND DISSEMINATED PARTICLES ASSOCIATED WITH STEEPLY DIPPING, NORTHWEST STRIKING FRACTURE ZONES. DEPOSITS RANGE IN LENGTH FROM 30 FT. TO 100 FT., ARE 6 FT. TO 30 FT. WIDE, AND ARE UP TO 20 FT. THICK. 12 UNPATENTED CLAIMS.

Comment (Workings): WORKINGS REPORTED IN 1961 CONSISTED OF SEVERAL OPEN CUTS AND A 100 FT. ADIT.

Comment (Geology): FOR REGIONAL GEOLOGY SEE SIERRA CABALLOS DISTRICT.

References

Reference (Production): FARNHAM, L.L., 1961 P. 125; AND NMBMMR GENERAL FILE DATA

Reference (Deposit): FARNHAM, L.L., 1961 USBM IC-8030, P. 125-126

Reference (Deposit): NMBMMR GENERAL FILE DATA

Reference (Deposit): KELLEY, V.C., AND SILVER, C., 1952 U.N.M. PUB. 4, P. 199, FIG.2

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