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Cocoktau Mine

Past Producer in Xinjiang* [Sinkiang], China with commodity Gemstone
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Sections on this page
  1. Identification information
  2. Geographic coordinates
  3. Site location context
  4. Geographic areas
  5. Commodities
  6. Materials information
  7. Host and associated rocks
  8. Nearby scientific data
  9. Economic information about the deposit and operations
  10. Links to other databases
  11. Bibliographic references
  12. General comments
  13. Reporter information

Geologic information

Identification information

Deposit ID 10064805
MRDS ID TC39309
Record type Site
Current site name Cocoktau Mine

Geographic coordinates

Geographic coordinates: 87.28354, 48.18119 (WGS84)
Elevation 1500
Location accuracy 10000(meters)
Relative position ABOUT 70 KM NW OF ALTAY CITY

Site location context

Political divisions (FIPS codes)

Xinjiang* [Sinkiang](province)

China(country)

Asia(continent)

Land(continent)

Geographic areas

Country State
China Xinjiang* [Sinkiang]

Commodities

Commodity Importance
Gemstone Primary

Comments on the commodity information

  • NUGGETS UP TO 62 G IN FAIRVIEW PLACER

Materials information

Materials Type of material
Albite Gangue
Diopside Gangue
Epidote Gangue
Hornblende Gangue
Quartz Gangue
Zoisite Gangue

Analytical data

Result STANDARD GEOLOGICAL TESTING OF 20 POLISHED GROSSULAR GARNET SECTIONS AS WELL AS OF ROUGH AND FACETED STONES
Result REFRACTIVE INDICES OF 1.727-1.737
Result SPECIFIC GRAVITY OF 3.58-3.65
Result MOHS HARDNESS OF 7.5
Result UNRESPONSIVE TO SHORT- OR LONG-WAVE ULTRAVIOLET RADIATION
Result GEOMOLOGICAL PROPERTIES AND CHEMICAL COMPOSITIONS WITHIN EXPECTED RANGE
Result COLOR PROGRESS FROM GREEN TO YELLOW GREEN TO REDDISH BROWN WITH INCREASED FE CONTENT AS DOES REFRACTIVE INDEX, SPECIFIC GRAVITY, AND UNIT-CELL PARAMETERS.

Host and associated rocks

  • Host or associated Host
    Rock type Metamorphic Rock > Metasedimentary Rock > Marble

Nearby scientific data

(1) 87.28354, 48.18119
ListMap

Economic information

Comments on the geologic information

  • TERTIARY FAIRVIEW PLACER QUITE RICH; QUATERNARY PLACER CREEK LOW GRADE; TERTIARY GRAVEL EXHUMED BY PLACER CREEK. BEDROCK SOURCE: PRECAMBRIAN VEINS

Economic information about the deposit and operations

Development status Past Producer
Commodity type Non-metallic
Deposit size Small
Significant No
Discovery year 1980

Comments on development

  • 8500 OZ PRODUCED IN THE FIRST THREE YEARS (ABOUT 50%) FAIRVIEW PLACERS EXHAUSTED BY LATE 1880'S AND ENDED BY 1900.

Reference information

Bibliographic references

  • Deposit

    WANG, FUQUAN, AND LIU, YAN, 1993, GARNETS FROM ALTAY, CHINA: GEMS AND GEMOLOGY, V. 29, NO. 4, P. 273-277

  • Production

    WANG AND LIU, 1993.

General comments

Subject category Comment text
Deposit Discovery Year: 1880'S
Deposit 500,000 G CONTAINED AU

Reporter information

Type Date Name Affiliation Comment
Reporter 01-SEP-94 Bliss, James D. U.S. Geological Survey

Beyond USGS

Supplemental information added by qvyshift.com. Not part of the original USGS MRDS record.

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