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  3. Mineral Resource Data System (MRDS)

Pioneer Group

Past Producer in Nicaragua with commodities Gold, Lead, Zinc, Copper
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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. Geologic structures
  11. Ore body information
  12. Controls for ore emplacement
  13. Economic information about the deposit and operations
  14. Mining district
  15. Ownership information
  16. Reserves and resources
  17. Links to other databases
  18. Bibliographic references
  19. Reporter information

Geologic information

Identification information

Deposit ID 10105202
MRDS ID TC34626
Record type Site
Current site name Pioneer Group
Alternate or previous names Pioneer-Lone Star, Vein Names: Highland Mary, Lone Star, Colorado, Guillermina, Pioneer

Geographic coordinates

Geographic coordinates: -84.63327, 14.01756 (WGS84)
Elevation 350
Location accuracy 2000(meters)
Relative position BONANZA (TOWN) 14-02N, 84-36W

Site location context

Political divisions (FIPS codes)

Nicaragua(country)

North America(continent)

Land(continent)

Geographic areas

Country
Nicaragua

Comments on the location information

  • CENTRAL GROUP IN PIS PIS DISTRICT.

Commodities

Commodity Importance
Gold Primary
Lead Secondary
Zinc Critical Secondary
Copper Secondary

Comments on the commodity information

  • BASE METAL SULFIDES MORE ABUNDANT THAN IN NEPTUNE GROUP, LESS ABUNDANT THAN IN CONSTANCIA GROUP.

Materials information

Materials Type of material
Bornite Ore
Chalcopyrite Ore
Galena Ore
Gold Ore
Sphalerite Ore
Chlorite Gangue
Hematite Gangue
Pyrite Gangue
Quartz Gangue

Alteration

  • (Local) Slight Wallrock Replacement; Alteration Abundant

Host and associated rocks

  • Host or associated Associated
    Rock type Plutonic Rock > Mafic Intrusive Rock > Diorite
  • Host or associated Host
    Rock type Volcanic Rock (Aphanitic)
    Rock unit name Matagalpa Volcanics;Basement Yojoa Limestones, Shales, Greywackes;Basement Shcists And Marbles
    Rock description Matagalpa Volcanics;Basement Yojoa Limestones, Shales, Greywackes;Basement Shcists And Marbles

Nearby scientific data

(1) -84.63327, 14.01756
ListMap

Economic information

Geologic structures

Type of structure Regional
Structure description Three Upthrown Blocks With Veins Separated By Two Downthrown Blocks; E-W Dip-Slip Faults With Small To Moderate Horizontal Displacement; Paleocaldera Structures?

Ore body information

  • Length 1000M
    Depth to bottom 500M

Controls for ore emplacement

  • Faults; Ore Shoots Often In Vein Junctions And Branch Points; Second Enrichment In Oxide Zone (50-100 M)

Comments on the geologic information

  • LEAD ISOTOPES INDICATE OLDER BASEMENT SOURCE OF LEAD. CRETACEOUS SEDIMENTS EXPOSED A FEW KM TO THE S OF THE DISTRICT. ACID VOLCANICS AND INTERMEDIATE INTRUSIVES KNOWN IN THE AREA.

Economic information about the deposit and operations

Development status Past Producer
Commodity type Metallic
Deposit size Small
Significant No

Mining district

District name Pis Pis District

Ownership information

  • Type Owner-Operator
    Owner Inmine

Reserves and resources

  • Type In-situ
    Estimate year 1991
    Total resources 16000mt ore
    Commodity Subtype Grade units Group Importance Year
    Gold Au 4.037 g/mt Gold Major 1991

Comments on the reserve resource information

  • FIGURE GIVEN IS FOR PIONEER 3 VEIN. OTHER RESERVES EXIST BUT WERE DISCARDED AS INACCESSIBLE.

Reference information

Bibliographic references

Reporter information

Type Date Name Affiliation Comment
Reporter 01-JUL-1992 Carbonaro, Marguerite M. (Venable, M.) U.S. Geological Survey

Beyond USGS

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

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