1. Mineral Resources
  2. Online Spatial Data
  3. Mineral Resource Data System (MRDS)

Rock Creek (Corundum)

Prospect in Alaska, United States with commodity Sapphire
Map
XML
JSON
KML
B
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. Economic information about the deposit and operations
  10. Mining district
  11. Links to other databases
  12. Bibliographic references
  13. General comments
  14. Reporter information

Geologic information

Identification information

Deposit ID 10000743
MRDS ID A011383
Record type Site
Current site name Rock Creek (Corundum)
Alternate or previous names Rock Creek Corundum

Geographic coordinates

Geographic coordinates: -143.35065, 62.59663 (WGS84)
Relative position Best location: Richter and Schmoll, 1973, USGS GQ-1062, loc. 5. Accurate within 100 ft radius.

Site location context

Political divisions (FIPS codes)

Valdez-Cordova(Census area)

Alaska(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

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

Nabesna NW(quadrangle 1:100,000 scale)

Nabesna(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

Upper Copper River(hydrologic unit)

Copper River(hydrologic accounting unit)

South Central Alaska(hydrologic subregion)

Alaska(hydrologic region)

Federal lands

Wrangell-St. Elias 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
Sapphire Primary

Comments on the commodity information

  • Gangue = soda feldspar

Materials information

Materials Type of material
Corundum Ore
Muscovite Gangue
Orthoclase Gangue
Microperthite Gangue

Host and associated rocks

  • Host or associated Associated
    Rock type Metamorphic Rock > Gneiss
  • Host or associated Host
    Rock type Plutonic Rock > Pegmatite

Nearby scientific data

(1) -143.35065, 62.59663
ListMap

Economic information

Comments on the geologic information

  • Geologic Description = Sporadic aggregates of corundum associated with books of muscovite in small, discontinuous alkali pegmatite dikes; dikes generally less than 3 ft wide; host rock for pegmatite dikes is peraluminous syenite-monzonite gneiss unit in a metaigneous complex composed of diorite gneiss and diorite with minor amphibolite, gabbro and cataclasite

Economic information about the deposit and operations

Development status Prospect
Commodity type Non-metallic

Comments on exploration

  • Status = Inactive

Mining district

District name Chistochina

Comments on the workings information

  • Workings / Exploration = Type of workings: surface

Reference information

Bibliographic references

Comments on the references

  • Primary Reference = Richter, 1970, USGS PP 700-C

General comments

Subject category Comment text
Deposit Model Name = Lode: pegmatite
Deposit Other Comments = Badly fractured habit, abundant feldspar inclusions, poor color and general scarcity of gem quality crystals have precluded economic development of this resource. See also: Rock Creek molybdenum prospect (NB011)

Reporter information

Type Date Name Affiliation Comment
Reporter 05-FEB-1997 Leonard, K.R. U.S. Geological Survey
Reporter 05-FEB-1997 Elliott, R.L. U.S. Geological Survey
Reporter 05-FEB-1997 Richter, D.H. 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.