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  3. Mineral Resource Data System (MRDS)

Drenchwater--East

Prospect in Alaska, United States with commodities Lead, Zinc, Silver, Barium-Barite
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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. Mineral occurrence model information
  9. Host and associated rocks
  10. Nearby scientific data
  11. Economic information about the deposit and operations
  12. Mining district
  13. Links to other databases
  14. Bibliographic references
  15. General comments
  16. Reporter information

Geologic information

Identification information

Deposit ID 10003149
MRDS ID A015681
Record type Site
Current site name Drenchwater--East
Related records 10282254

Geographic coordinates

Geographic coordinates: -158.68373, 68.56955 (WGS84)
Relative position Location plotted is site of samples NK13k and NK14b of Nokleberg and Winkler (1982, Pl. 2) and locality 65 of Jansons (1982, p. 17), in T10S, R29W; about 0.25 mi (0.4 km) west of False Wager Creek from a point about 2.25 mi (3.6 km) upstream from its confluence with Drenchwater Creek; located to within 2000 ft (610 m).

Site location context

Political divisions (FIPS codes)

North Slope(Borough)

Alaska(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Howard Pass C-5(quadrangle 1:63,360 scale)

Howard Pass NW(quadrangle 1:100,000 scale)

Howard Pass(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

Upper Colville River(hydrologic unit)

Colville River(hydrologic accounting unit)

Arctic Alaska(hydrologic subregion)

Alaska(hydrologic region)

Federal lands

National Petroleum Reserve - Alaska(National Petroleum Reserve)

National Petroleum Reserve BLM(Type of land area)

BLM(Federal land areas administered by BLM)

Geographic areas

Country State
United States Alaska

Commodities

Commodity Importance
Lead Primary
Zinc Critical Primary
Silver Secondary
Barium-Barite Critical Secondary

Materials information

Materials Type of material
Galena Ore
Sphalerite Ore
Fluorite Gangue
Pyrite Gangue
Quartz Gangue

Alteration

  • (Local) Silicification of minor carbonate layers in shale may be diagenetic.

Mineral occurrence model information

Model code 208
USGS model code 31a
Deposit model name Sedimentary exhalative Zn-Pb
Mark3 model number 13

Host and associated rocks

  • Host or associated Host
    Rock type Sedimentary Rock > Clastic Sedimentary Rock > Shale > Black Shale
    Rock unit name Lisburne Group;Lisburne Group;Siksikpuk Formation;Siksikpuk Formation;Siksikpuk Formation
    Rock description Lisburne Group;Lisburne Group;Siksikpuk Formation;Siksikpuk Formation;Siksikpuk Formation

Nearby scientific data

(1) -158.68373, 68.56955
ListMap

Economic information

Comments on the geologic information

  • Geologic Description = Apparently stratiform deposit of disseminated fine-grained galena, sphalerite, and pyrite, minor barite, and rare fluorite in black chert, and siliceous shale of the Mississippian to Lower Pennsylvanian(?) Kuna Formation of the Lisburne group. Sporadic occurrences of sphalerite and galena occur in a zone that extends about 1.25 mi (2 km) west-northwest from this locality parallel to the strike of bedding. Main discovery rubblecrop is semi-massive sulfide with quartz gangue. Sulfides probably syngenetic. Interbedded felsic to intermediate(?) composition volcanic rocks lie north of mineralized zone; stratigraphic top not known so Pb-Zn mineralization may either underlie or overlie the volcanic section. Some sulfides also present as fracture fillings and in boxwork silica. Area imbricated by thrust faults of various displacements (Nokleberg and Winkler, 1982).
  • Age = K-Ar ages of 319+10 and 330+17 Ma were obtained from biotite from a volcanic interbed within the mineralized belt; a Pb-isotope model age of 200 Ma was obtained from galena.

Economic information about the deposit and operations

Development status Prospect
Commodity type Metallic

Comments on exploration

  • Status = Inactive

Mining district

District name Colville

Comments on the workings information

  • Workings / Exploration = Samples contain >10,000 ppm Zn, 1000 ppm Pb, 700 ppm Ba, and 20 ppm Ag (Nokleberg and Winkler, 1982, p. 16).

Reference information

Bibliographic references

Comments on the references

  • Primary Reference = Nokleberg and Winkler (1982)

General comments

Subject category Comment text
Deposit Model Name = Lode; sediment-hosted Pb-Zn

Reporter information

Type Date Name Affiliation Comment
Reporter 30-SEP-1996 M.T. Powers U.S. Geological Survey
Reporter 30-SEP-1996 D.F. Huber U.S. Geological Survey
Reporter 30-SEP-1996 J.M. Schmidt U.S. Geological Survey
Reporter 30-SEP-1996 J.H. Dover 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

Authoritative Alaska resources

These are landing pages for further research — the state agencies don't currently expose per-mine deep links.