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  3. Mineral Resource Data System (MRDS)

Casca Zinc

Prospect in Alaska, United States with commodities Lead, Zinc, 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. Nearby scientific data
  10. Economic information about the deposit and operations
  11. Mining district
  12. Links to other databases
  13. Bibliographic references
  14. General comments
  15. Reporter information

Geologic information

Identification information

Deposit ID 10307398
Record type Site
Current site name Casca Zinc

Geographic coordinates

Geographic coordinates: -141.08178, 65.3218 (WGS84)
Relative position The Casca Zinc prospect is at about 2,600 feet elevation, approximately 1/3 mile southwest of Tindir Creek, in the NE1/4 section 26, T. 6 N., R. 32 E., of the Fairbanks Meridian. This prospect is on land selected by or conveyed to Doyon, Limited. The location is accurate.

Site location context

Political divisions (FIPS codes)

Southeast Fairbanks(Census area)

Alaska(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Charley River B-1(quadrangle 1:63,360 scale)

Charley River SE(quadrangle 1:100,000 scale)

Charley River(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

Alaska(hydrologic region)

Federal lands

Doyon, Limited(ANCSA Region)

ANCSA Region NTVPIC(Type of land area)

NTVPIC(Federal land areas administered by NTVPIC)

Yukon-Charley Rivers National Preserve(National Preserve)

National Preserve NPS(Type of land area)

NPS(Federal land areas administered by NPS)

Geographic areas

Country State
United States Alaska

Commodities

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

Materials information

Materials Type of material
Barite Ore
Galena Ore
Hematite Ore
Sphalerite Ore

Alteration

  • (Local) Iron oxide, sulfides, and silicification occur mainly along fault and fracture zones (DiMarchi and others, 1993).

Mineral occurrence model information

Model code 228
USGS model code 32b
Deposit model name Mississippi Valley, Appalachian Zn
Mark3 model number 42

Nearby scientific data

(1) -141.08178, 65.3218
ListMap

Economic information

Comments on the geologic information

  • Geologic Description = The mineralization at Casca Zinc prospect is hosted by limestone of the Lower Cambrian Funnel Creek Formation (Brabb and Churkin, 1969). The deposits consists of fracture and open-space fillings that locally contain specular hematite, barite, and sphalerite. The sphalerite is typically massive, very fine grained, and compact, but is also found disseminated throughout the limestone (DiMarchi and others, 1993). Alteration consists mainly of silicification of fossiliferous limestone, but iron oxides and specular hematite can be locally abundant. Most of the iron oxide, alteration, and sulfide mineralization is confined to fault and fracture zones. Soil sampling programs starting in the mid-1970s have outlined areas of anomalous zinc and lead. Rock samples from Casca Zinc prospect yield as much as 18.9 percent Zn (DiMarchi and others, 1993).
  • Age = Early Cambrian or younger, based on the age of the host rocks.

Economic information about the deposit and operations

Development status Prospect

Comments on exploration

  • Status = Active

Mining district

District name Black

Comments on the workings information

  • Workings / Exploration = Several soil and rock sampling programs have been carried out on the property, beginning in the mid-1970s. In 1993, a detailed mapping program was completed by ASA Inc. This property lies on Doyon, Limited selected or conveyed land.

Reference information

Bibliographic references

Comments on the references

  • Primary Reference = DiMarchi and others, 1993

General comments

Subject category Comment text
Deposit Model Name = Carbonate-hosted Zn-Pb; Appalachian Zn (Schmidt, 1997; Cox and Singer, 1986; model 32b)
Deposit Other Comments = This property lies on Doyon, Limited selected or conveyed land. For more information, contact Doyon, Limited. This site is within the Yukon-Charley Rivers National Preserve.

Reporter information

Type Date Name Affiliation Comment
Reporter 07-APR-00 Cameron, C.E. Alaska Division of Geological and Geophysical Surveys

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.