Dark Ridge Olivine Deposit

Past Producer in Jackson county in North Carolina, United States with commodities Olivine, Chromium

Geologic information

Identification information

Deposit ID 10025915
MRDS ID K001893
Record type Site
Current site name Dark Ridge Olivine Deposit
Related records 10175907

Geographic coordinates

Geographic coordinates: -83.10071, 35.4126 (WGS84)
Relative position 1.25 MILES SOUTHWEST OF BALSAM
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Geographic areas

Country State County
United States North Carolina Jackson

Commodities

Commodity Importance
Olivine Primary
Chromium Secondary

Materials information

Materials Type of material
Chromite Ore
Olivine Ore

Alteration

  • (Local) Very Little Serpentinization Evident

Host and associated rocks

  • Host or associated Host
    Rock type Metamorphic Rock > Gneiss
    Stratigraphic age (youngest) Neoproterozoic

Nearby scientific data

(1) -83.10071, 35.4126

Ore body information

  • Width 274.32M
    Length 609.6M

Comments on the geologic information

  • COMPOSED OF UNUSUALLY COARSE GRAINED DUNITE AND SAXONITE. SHATTERED OLIVINE CRYSTALS AS LARGE AS SIX INCHES IN DIAMETER OCCUR THROUGHOUT CORE. SMALL CRYSTALS OF CHROMITE ARE VISIBLE THROUGHOUT DUNITE AND AT MANY PLACES SEAMS OF MASSIVE CHROMITE OUTCROP. SAXONITE OCCURS CHIEFLY IN BORDER ZONE OF PERODITITE OR AS SMALL FAULT BLOCKS WITHIN DUNITE. SAXONITE IS PARTLY ALTERED TO SERPENTINE AND STEATITE. BRONZITE CRYSTALS AVERAGE 1/4 IN. IN DIAMETER AND MAKE UP 10% OF SAXONITE. BRONZITE IS OFTEN ALTERED TO TALC.

Economic information

Economic information about the deposit and operations

Development status Past Producer
Commodity type Metallic
Significant No
Year of first production 1930
Production years 1930

Mining district

District name Webster-Balsam Area

Comments on the production information

  • PROBABLY LESS THAN 50 TONS CHROMITE PRODUCED INCLUDING ONE SOLID LUMP OF 250 POUNDS

Reference information

Links to other databases

Agency Database name Acronym Record ID Notes
USGS Mineral Resources Data System MRDS K001893

Bibliographic references

  • Deposit

    HUNTER, C.E., 1941, FORSTERITE OLIVINE DEPOSITS OF NORTH CAROLINA AND GEORGIA: NORTH CAROLINA DIV. MINERAL RESOURCES BULL. 41. 117 P.

  • Deposit

    LARRABEE, D.M. AND SWEENEY, J.W., 1968, OLIVINE IN MINERAL RESOURCES OF THE APPALACHIAN REGION: U.S. GEOLOGICAL SURVEY PROF. PAPER 580, P.326-327

  • Deposit

    HUNTER, C.E. AND OTHERS 1942, CHROMITE DEPOSITS OF NORTH CAROLINA: NORTH CAROLINA DIV. MINERAL RESOURCES BULL. 42. 39 P.

  • Deposit

    1941 GEOLMAP TENN. VALLEY AUTHORITY, REPOR

  • Production

    HUNTER, C.E., 1941, N.C. DIV. MIN. RES. BULL. 41

Reporter information

Type Date Name Affiliation Comment
Reporter 01-APR-1974 Fagan, James M. U.S. Geological Survey