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Darrahe-Pech

Occurrence in Nangarhar, Afghanistan with commodities Feldspar, Beryllium, Lithium, Niobium (Columbium), Tantalum
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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. Ore body information
  10. Economic information about the deposit and operations
  11. Mining district
  12. Reserves and resources
  13. Links to other databases
  14. Bibliographic references
  15. General comments
  16. Reporter information

Geologic information

Identification information

Deposit ID 10023778
MRDS ID I001521
Record type Site
Current site name Darrahe-Pech

Geographic coordinates

Geographic coordinates: 70.73955, 34.92213 (WGS84)

Site location context

Political divisions (FIPS codes)

Nangarhar(province)

Afghanistan(country)

Geographic areas

Country State
Afghanistan Nangarhar

Comments on the location information

  • FIELD COVERS 34-55-02 TO 34-55-53N AND 70-44-12 TO 70-44-53E

Commodities

Commodity Importance
Feldspar Primary
Beryllium Critical Primary
Lithium Critical Primary
Niobium (Columbium) Critical Tertiary
Tantalum Critical Tertiary

Comments on the commodity information

  • BERYL IN TYPE 1 PEGS ARE 1-2 BY 3-4 CM IN SIZE NEAR THE SELVAGES AND INCREASE IN SIZE AWAY FROM THE SELVAGES TO 5-10 BY 8-15 CM. THE SPODUMENE CRYSTALS IN TYPE 2 PEGS ARE 2-15 CM LONG AND 0.3-1.5 CM IN DIAMETER. THE BERYL CRYSTALS ASSOCIATED WITH THE SPODUMENE ARE ONLY MILLIMETERS IN SIZE. COLUMBITE-TANTALITE PLATES ASSAY 0.354% LI20 AND 0.05% BEO AND THOUSANDTHS OF A PERCENT TANTALUM PENTOXIDE.

Materials information

Materials Type of material
Beryl Ore
Columbite Ore
Spodumene Ore
Tantalite Ore

Host and associated rocks

  • Host or associated Associated
    Rock type Plutonic Rock > Mafic Intrusive Rock > Diorite
  • Host or associated Associated
    Rock type Plutonic Rock > Mafic Intrusive Rock > Gabbro
  • Host or associated Host
    Rock type Metamorphic Rock > Schist
  • Host or associated Host
    Rock type Sedimentary Rock > Carbonate > Limestone

Nearby scientific data

(1) 70.73955, 34.92213
ListMap

Economic information

Ore body information

  • Thickness 6M
    Length 2150M

Economic information about the deposit and operations

Development status Occurrence
Commodity type Both
Significant No

Mining district

District name Darrahe-Nur Pegmatite Field.

Reserves and resources

  • Type In-situ
    Estimate year 1977
    Total resources 100358000mt ore
    Commodity Subtype Grade units Group Importance Year
    Beryllium Beo 0.085 wt-pct Beryllium Major 1977
    Lithium Li 0.354 wt-pct Lithium Major 1977

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 PEGMATITES OCCUR AT EXOCONTACT OF GABBRO AND QUARTZ DIORITE. 2 TYPES OF PEGMATITES: 1) LARGE, ALBITIZED MICROLINE PEGS WITH BERYL; AND 2) SPODUMENE-ALBITE PEGMATITES WITH COMPLEX LI-BE MINERALIZATION. BERYL CAN BE HAND-SORTED FROM THE TYPE 1 PEGS WHICH ARE TABULAR, FLAT-LYING, AND 350-2150 M LONG, 0.2-6.0 M THICK. TYPE 2 PEGS HAVE LARGER SPODUMENE CRYSTALS WITH MUCH SMALLER BERYL CRYSTALS, AS WELL AS THIN PLATES OF COLUMBITE-TANTALITE.

Reporter information

Type Date Name Affiliation Comment
Reporter 01-OCT-1989 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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