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Coco Mina

Past Producer in Nicaragua with commodities Gold, Zinc, Silver, Lead
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Sections on this page
  1. Identification information
  2. Geographic coordinates
  3. Site location context
  4. Geographic areas
  5. Commodities
  6. Alteration
  7. Host and associated rocks
  8. Nearby scientific data
  9. Controls for ore emplacement
  10. Economic information about the deposit and operations
  11. Links to other databases
  12. Bibliographic references
  13. General comments
  14. Reporter information

Geologic information

Identification information

Deposit ID 10105269
MRDS ID TC35901
Record type Site
Current site name Coco Mina
Alternate or previous names Miller's Or Mueller's Mine

Geographic coordinates

Geographic coordinates: -84.79994, 14.56753 (WGS84)
Elevation 180
Location accuracy 10000(meters)
Relative position 285 KM NNE OF MANAGUA, 170 KM WNW OF PUERTO CABEZAS.

Site location context

Political divisions (FIPS codes)

Nicaragua(country)

North America(continent)

Land(continent)

Geographic areas

Country
Nicaragua

Comments on the location information

  • ZN-AU MINERALIZATION CONCENTRATED ON EAST SIDE OF LAKE.

Commodities

Commodity Importance
Gold Primary
Zinc Critical Primary
Silver Secondary
Lead Tertiary

Comments on the commodity information

  • FINE FREE GOLD IN UPPER PORTIONS OF DEPOSIT. BLACK SPHALERITE FILLS VOIDS (FORMS MATRIX) IN BRECCIA. PYRITE FORMS CRYSTALLINE MASSES 2-5 CM WITHIN MATRIX, AS WELL AS FINE DISSEMINATIONS THROUGHOUT ALTERATION ZONE. AU ASSOCIATED WITH PYRITE AND SPHALERITE.

Alteration

  • (Local) Kaolinization, Sericitization, Pyritization

Host and associated rocks

  • Host or associated Host
    Rock type Volcanic Rock (Aphanitic) > Felsic Volcanic Rock > Dacite

Nearby scientific data

(1) -84.79994, 14.56753
ListMap

Economic information

Controls for ore emplacement

  • Small Caldera-Like Structure

Economic information about the deposit and operations

Development status Past Producer
Commodity type Metallic
Deposit size Small
Significant No
Discovery year 1900
Production years 1900-1944

Comments on the reserve resource information

  • BASED ON 22 NQ SIZED VERTICAL HOLES-5140 M, BULK SAMPLE RESULTS FACTORED AGAINST DRILL HOLE RESULTS WITH THE DRILL RESULTS ON THEIR OWN GIVING LOWER GRADES POSSIBLY DUE TO RECOVERY PROBLEMS.

Comments on development

  • FIRST WORKED BY MR. MUELLER 1900-1944 FOR AU; THEN TEXANA MINING CO. (1942-1945). STUDIED BY ROSARIO AND FRESNILLO 1974-1979, GEOCHEMISTRY AND GEOPHYSICS.

Reference information

General comments

Subject category Comment text
Deposit IRREGULAR BODY, ELONGATE NNE, MEASURING ABOUT 300 X 60 M. AU PLACERS DOWNSTREAM.

Reporter information

Type Date Name Affiliation Comment
Reporter 01-SEP-92 Venable, Margaret U.S. Geological Survey

Beyond USGS

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

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