1. Mineral Resources
  2. Online Spatial Data
  3. Mineral Resource Data System (MRDS)

Devez-Changement

Producer in Department of Guiana [French Guiana], France with commodity Gold
Map
XML
JSON
KML
B
Sections on this page
  1. Identification information
  2. Geographic coordinates
  3. Site location context
  4. Geographic areas
  5. Commodities
  6. Materials information
  7. Mineral occurrence model information
  8. Host and associated rocks
  9. Nearby scientific data
  10. Ore body information
  11. Economic information about the deposit and operations
  12. Ownership information
  13. Links to other databases
  14. Bibliographic references
  15. General comments
  16. Reporter information

Geologic information

Identification information

Deposit ID 10064880
MRDS ID TC39767
Record type Site
Current site name Devez-Changement

Geographic coordinates

Geographic coordinates: -52.41668, 4.55245 (WGS84)
Location accuracy 10000(meters)

Site location context

Political divisions (FIPS codes)

Department of Guiana [French Guiana](province)

France(country)

Europe(continent)

Land(continent)

Geographic areas

Country State
France Department of Guiana [French Guiana]

Comments on the location information

  • POINT NE OF SAINT MARIE-LES-MINES, BASED ON MACHAIRAS 1:1,750,000 GEOCHEM MAP IN ORAPU RIVER BASIN. CHANGEMENT IS AT 04-26-14N, 052-30-30W; DEVEZ IS AT 04-31-34N, 052-21-55W.

Commodities

Commodity Importance
Gold Primary

Materials information

Materials Type of material
Chalcopyrite Ore
Galena Ore
Gold Ore
Molybdenite Ore
Pyrite Ore
Sphalerite Ore
Quartz Gangue
Tourmaline Gangue

Analytical data

Result FLUID INCLUSIONS, 200-300 DEGREES C., CO2 +H2O.

Mineral occurrence model information

Model code 273
USGS model code 36a
Deposit model name Low-sulfide Au-quartz vein
Mark3 model number 27

Host and associated rocks

  • Host or associated Host
    Rock type Metamorphic Rock > Metavolcanic Rock
    Rock unit name Paramaca
    Rock description Paramaca
    Stratigraphic age (youngest) Neoproterozoic
  • Host or associated Host
    Rock type Volcanic Rock (Aphanitic) > Felsic Volcanic Rock > Dacite

Nearby scientific data

(1) -52.41668, 4.55245
ListMap

Economic information

Ore body information

  • Dip }

Economic information about the deposit and operations

Development status Producer
Commodity type Metallic
Significant No

Ownership information

  • Type Operator
    Owner Brgm-Comilog-Blanchard Syndicate Blanchard-Cassous-Sesic ) Exploited.
    First year 1985
    Last year 1985

Comments on the production information

  • AU (1) GRAVITY CONCENTRATE. AU(2) GRAVITY OF 0.8-2.8 MM MATERIAL. AU(3) CYANIDE OF FINES; FROM CHANGEMENT OXIDIZED AND WEATHERES MATERIALS.

Comments on development

  • INFORMATION ON CHANGEMENT: GEOCHEM ON A GRID 200X100 M (1977) AND MORE GEOCHEM (1978-1979) BY BRGM; 1980 4 DRILL HOLES (410M), 2 WENT INTO MYLONITE ZONE, OTHER 2 HAD INTERSECTIONS OF 4 M OF 6.2 G/T AU, AND 7 M OF 7 G/T AU (BRGM). BLANCHARD-CASSOUS (1985-1987) USED CYCLONES AND KNELSON CONCENTRATORS TO RECOVER OXIDIZED AND ALTERED ROCK AU, SESIC AND BRGM TRIED USING CYANIDE TO RECOVER AU FROM FINES.

Reference information

Bibliographic references

  • Deposit

    MACHAIRAS, GEORGES, 1963, METALLOGENIE DE L'OR EN GUYANE FRANCAISE: MEMOIRES DU BUREAU DE RECHERCHES GEOLOGIQUES ET MINIERES, NO. 22, 207P.

  • Deposit

    CHOUBERT, B., 1974, LE PRECAMBRIEN DES GUYANES: MEMOIRES DU BUREAU DE RECHERCHES GEOLOGIQUES ET MINIERES NO. 81, 212P.

  • Deposit

    CHOUBERT, B., 19(?), CARTE GEOLOGIQUE DU DEPARTEMENT DE LA GUYANE: SERVICE DE LA CARTE GEOLOGIQUE DE LA FRANCE, SCALE 1:500,000, NO DATE GIVEN.

  • Deposit

    BRGM, 1979, INVENTAIRE MINIER DU DEPARTEMENT DE LA GUYANE: BILAN ET PERSPECTIVES: MINISTERE DE L'INDUSTRIE; BUREAU DE RECHERCHES GEOLOGIQUES ET MINIERES, AUG. 1979, 127P.

  • Deposit

    LASSERE, J.L. AND PLAT, R., 1987, INVENTAIRE MINIER DE LA GUYANE: MINISTERE DE L'INDUSTRIE DES POSTIS ET TELECOMMUNICATIONS ET DU TOURISME, BUREAU DE RECHERCHES GEOLOGIQUES ET MINIERES , DEC. 1987, 58P.

  • Other Database

    CIMRI

  • Production

    LASSERE AND PLAT (1987).

General comments

Subject category Comment text
Deposit GEOCHEMICAL ANOMALY OF AU, MO, W.

Reporter information

Type Date Name Affiliation Comment
Reporter 01-SEP-1993 Page, Norman J. U.S. Geological Survey

Beyond USGS

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

Maps centered on this site