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  3. Mineral Resource Data System (MRDS)

Darkhenj

Producer in Parvan [Parwan], Afghanistan with commodities Gemstone, Beryllium
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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. Alteration
  8. Host and associated rocks
  9. Nearby scientific data
  10. Ore body information
  11. Controls for ore emplacement
  12. Economic information about the deposit and operations
  13. Links to other databases
  14. Bibliographic references
  15. General comments
  16. Reporter information

Geologic information

Identification information

Deposit ID 10023770
MRDS ID I001511
Record type Site
Current site name Darkhenj

Geographic coordinates

Geographic coordinates: 69.75902, 35.41239 (WGS84)

Site location context

Political divisions (FIPS codes)

Parvan [Parwan](province)

Afghanistan(country)

Geographic areas

Country State
Afghanistan Parvan [Parwan]

Comments on the location information

  • DISTRICT 34-40-10N TO 34-44-00N AND 70-00-20E TO 70-02-15E

Commodities

Commodity Importance
Gemstone Primary
Beryllium Critical Primary

Materials information

Materials Type of material
Beryl Ore
Emerald Ore

Alteration

  • (Local) Biotization, Albitization, Tourmalization, Pyritization, Silicification.

Host and associated rocks

  • Host or associated Host
    Rock type Plutonic Rock > Mafic Intrusive Rock > Diorite
  • Host or associated Host
    Rock type Metamorphic Rock > Metasedimentary Rock > Marble
  • Host or associated Host
    Rock type Metamorphic Rock > Schist

Nearby scientific data

(1) 69.75902, 35.41239
ListMap

Economic information

Ore body information

  • Length 450M

Controls for ore emplacement

  • Shear Zone

Comments on the geologic information

  • ORDOVICIAN CARBONATE ROCKS ALSO ASSOCIATED. CARBONATES ARE INTRUDED BY DIORITE-GABBRO AND QUARTZ-PORPHYRY DIKES AND (OR) SILLS.

Economic information about the deposit and operations

Development status Producer
Commodity type Both
Significant No

Reference information

Bibliographic references

  • Deposit

    ABDULLAH, SH., CHMYRIOV, V.M., STAZHILO-ALAKSEEV, K.F., DRONOV, V.I., GANNAN, P.J., ROSSOVSKIY, L.N., KAFARSKIY, A.KH., AND MALYAROV, E.P., 1977, MINERAL RESOURCES OF AFGHANISTAN (2ND EDITION): KABUL, AFGHANISTAN, REPUBLIC OF AFGHANISTAN GEOLOGICAL AND MINERAL SURVEY, 419 P

General comments

Subject category Comment text
Deposit 2 TYPES PEGMATITES: SPODUMENE-ALBITE AND PETALITE-SPODUMENE-ALBITE.
Deposit MINERALIZED AREA UP TO 16 KM LONG AND 3 KM WIDE. DIKES ARE 430-450 M LONG, EMERALDS HAVE BEEN TRACED ALONG STRIKE UP TO 52 M AND 30 M DOWN DIP. BERYL AND EMERALDS CONFINED TO SMALL QUARTZ-ANKERIT AND DOLOMITE VEINLET NETWORKS. EMERALD GREEN BERYL CRYSTALS 1.0-1.5 CM LONG AND 2-3 MM THICK (TO 3.2 CM LONG AND 5-7 MM THICK). UNFRACTURED EMERALDS (4X2 MM) FOUND IN SMALL CAVITIES IN THE QUARTZ-ANKERITE VEINS, WHERE EMERALDS COMMONLY ARE 5-10 % OF VOLUME (OCCASIONALLY 30%). THE EMERALD IS USUALLY INTERGROWN WITH QUARTZ. BETTER QUALITY EMERALDS ARE COMMONLY IN QUARTZ-ANKERITE VEINS IN STRONGLY ALTERED AND THICK DIORITE-GABBRO.

Reporter information

Type Date Name Affiliation Comment
Reporter 01-APR-1990 Wells, Tina M. (Orris, Greta J.) U.S. Geological Survey

Beyond USGS

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

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