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  3. Mineral Resource Data System (MRDS)

Mullen Prospect

Occurrence in Alaska, United States with commodities Copper, Silver, Gold
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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. Economic information about the deposit and operations
  12. Reserves and resources
  13. Workings at the site
  14. Links to other databases
  15. Bibliographic references
  16. General comments
  17. Reporter information

Geologic information

Identification information

Deposit ID 10000860
MRDS ID A011513
Record type Site
Current site name Mullen Prospect
Related records 10136745

Geographic coordinates

Geographic coordinates: -144.06698, 61.67548 (WGS84)
Location accuracy 2000(meters)

Site location context

Political divisions (FIPS codes)

Valdez-Cordova(Census area)

Alaska(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Valdez C-1(quadrangle 1:63,360 scale)

Valdez NE(quadrangle 1:100,000 scale)

Valdez(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

Middle Copper River(hydrologic unit)

Copper River(hydrologic accounting unit)

South Central Alaska(hydrologic subregion)

Alaska(hydrologic region)

Federal lands

Wrangell-St. Elias National Park(National Park)

National Park NPS(Type of land area)

NPS(Federal land areas administered by NPS)

Geographic areas

Country State
United States Alaska

Comments on the location information

  • BEST LOCATION: USGS BULL 745, PLATE 3, LOC. 18 LAND STATUS VALUE CALCULATED 6-94 USING GIS OVERLAY ANALYSIS WITH BLM 1:2,500,000 SCALE OWNERSHIP STATUS MAP (1991).

Commodities

Commodity Importance
Copper Primary
Silver Secondary
Gold Secondary

Materials information

Materials Type of material
Bornite Ore
Chalcocite Ore
Chalcopyrite Ore
Covellite Ore
Malachite Ore
Calcite Gangue
Pyrite Gangue
Quartz Gangue

Alteration

  • (Local) Diorite Altered To Chlorite, Calcite, Talc, Levcoxene, Quartz And Pyrite

Analytical data

Result 5 FT CHANNEL SAMPLE: 1.55% CU
Result 4 FT CHANNEL SAMPLE: 5.82% CU, TRACEAU, 0.28 OZ/TON AG
Result USGS BULL 947, P. 129

Host and associated rocks

  • Host or associated Associated
    Rock type Metamorphic Rock > Metavolcanic Rock > Mafic Metamorphic Rock > Greenstone
    Rock unit name Nikolai Greenstone;
    Rock description Nikolai Greenstone;
    Stratigraphic age (youngest) Late Triassic
    Stratigraphic age (youngest) Late Triassic
  • Host or associated Host
    Rock type Sedimentary Rock > Carbonate > Limestone
    Rock unit name Chitistone Limestone
    Rock description Chitistone Limestone

Nearby scientific data

(1) -144.06698, 61.67548
ListMap

Economic information

Geologic structures

Type of structure Regional
Structure description Regional Stratigraphy Consists Of Nikolai Greenstone Overlain By Chitistone Limestone; Greenstone-Limestone Section Has Been Thrust Over Younger Tri Sediments

Comments on the geologic information

  • GEOL.COM: DEPOSIT IS IN CHITISTONE LIMESTONE THAT HAS BEEN INTRUDED BY SMALL BODIES OF NOW-ALTERED DIORITE; NEAR CONTACT WITH NIKOLAI GREENSTONE

Economic information about the deposit and operations

Development status Occurrence
Commodity type Metallic
Deposit size Small
Significant No

Reserves and resources

  • Type In-situ
    Estimate year 1946
    Commodity Subtype Grade units Group Importance Year
    Copper Cu 1.55 wt-pct Copper Major 1946
  • Type In-situ
    Estimate year 1946
    Commodity Subtype Grade units Group Importance Year
    Copper Cu 5.82 wt-pct Copper Major 1946
    Silver Ag 7.905 g/mt Silver Minor 1946

Comments on the reserve resource information

  • USGS BULL 947-G, P. 129

Workings at the site

  • Type of workings Surface/Underground
    Length 243.84M

Comments on the workings information

  • EXPLORED BY 3 OPEN CUTS, MORE THAN 800 FT OF UNDERGROUND WORKINGS PLUS 2 INCLINED WINZES; PRESENT CONDITIONS UNKNOWN

Comments on development

  • COPPER CREEK AREA WAS ACTIVELY PROSPECTED BETWEEN ABOUT 1900 AND 1930

Reference information

Bibliographic references

General comments

Subject category Comment text
Deposit SHEAR ZONE 3 FT WIDE CONTAINS VEINS UP TO 18 IN THICK, LENTICULAR BODIES AND IRREGULAR BUNCHES OF PYRITE, BORNITE, CHALCOPYRITE, COVELLITE AND CHALCOCITE; REPLACEMENT OF LIMESTONE
Deposit SEE ALSO: AMMANN, PEACOCK, CAVE; AREA AROUND MULLEN SIMILAR TO VICINITY OF BLUEBIRD CLAIM; FOR INFORMATION ON DIAGENESIS OF CHITISTONE LIMESTONE AND ITS RELATION TO NIKOLAI GREENSTONE SEE: USGS PP 1212-A ; INFO.SRC : 1 PUB LIT; 2 UNPUB REPT

Reporter information

Type Date Name Affiliation Comment
Reporter 01-JUL-1985 Leonard, Kenneth R. (Elliott, R. L.) U.S. Geological Survey
Editor 14-APR-1994 Mosier, Dan 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.