Moose Jaw

Prospect in Alaska, United States with commodity Antimony

Geologic information

Identification information

Deposit ID 10308032
Record type Site
Current site name Moose Jaw

Geographic coordinates

Geographic coordinates: -156.0067, 63.54066 (WGS84)
Relative position The Moose Jaw prospect is located on the east side of Eldorado Creek near the headwaters of Colorado Creek. The prospect is at an elevation of about 2000 feet, in the NE1/4 of sec. 32, T. 22 S., R. 15 E., Kateel River Meridian. The location is accurate.
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Geographic areas

Country State
United States Alaska


Commodity Importance
Antimony Primary

Materials information

Materials Type of material
Stibiconite Ore
Stibnite Ore
Quartz Gangue


  • (Local) Alteration at the Moose Jaw prospect consists of extensive hornfelsing of the sedimentary rocks adjacent to igneous rocks.

Mineral occurrence model information

Model code 106
USGS model code 25b
Deposit model name Epithermal vein, Creede
Mark3 model number 58
Model code 150
USGS model code 25c
Deposit model name Epithermal vein, Comstock
Mark3 model number 16

Nearby scientific data

(1) -156.0067, 63.54066

Comments on the geologic information

  • Geologic Description = Bedrock in the vicinity of the Moose Jaw prospect consists of intermediate to mafic volcanic and volcaniclastic rocks, and of Cretaceous Kuskokwim Group black shale, limestone, graywacke, and conglomerate intruded by Cripple Mountain monzonite (McGinnis, 1997; Avalon Development Corp., 1998; Duncan, 1999). Hornfelsed sedimentary rocks, and rare basalt and rhyodacite dikes are present (Barker, 1996; Avalon Development, 1998). Mineralization at the Moose Jaw prospect was exposed in a now-reclaimed trench. What remains is a small pile of stibnite, stibiconite, and vuggy crystalline quartz boulders (Avalon Development, 1998). Several thin quartz-limonite veins are present in float 20 meters to the southeast. Exploration at the Moose Jaw prospect consists of geologic mapping and sampling by Barker during 1994, 1995, and 1996; soil sampling, rock sampling, and geologic mapping by NovaGold during 1998; and mobile-metallic-ion (MMI) sampling by Poseidon Minerals, Ltd. during 1999 (Barker, 1996; Avalon Development Corp., 1998; Duncan, 1999). Also see OP031, 033, and 034; and in the Medfra quadrangle, MD019 and 020.
  • Age = Cretaceous or younger. The igneous rocks associated with the prospect intrude Cretaceous strata of the Kuskowkwim Group.

Economic information

Economic information about the deposit and operations

Development status Prospect

Comments on exploration

  • Status = Active

Mining district

District name Innoko

Comments on the workings information

  • Workings / Exploration = During 1994, 1995, and 1996, claimholder Ron Rosander contracted geologist James Barker to evaluate the lode sources of placer gold in the Colorado Creek area. Barker collected 254 soil samples, 93 rock samples, and 12 samples of placer gold for scanning-electron microscope and trace- element analysis. Geologic mapping and a ground-based magnetometer survey were also carried out (Barker, 1996; McGinnis, 1997). In 1996, the Alaska Division of Geological and Geophysical Surveys conducted geologic mapping in the Cripple Creek Mountains and Placer Dome Exploration flew an east-west-oriented aeromagnetic survey over the Cripple Creek Mountains. Nova Gold conducted geologic mapping, rock sampling, and soil sampling during the summer of 1998 (Avalon Development, 1998). During 1999, Poseidon Minerals, Ltd. carried out soil sampling in the Colorado Creek area, and used mobile-metallic-ion (MMI) analyses (Duncan, 1999).

Reference information

Links to other databases

Agency Database name Acronym Record ID Notes
USGS Alaska Resource Data File ARDF OP032

Bibliographic references

  • Deposit

    Barker, J.C., 1996, Geologic evaluation of the Colorado Creek prospect area, Alaska: Summary report prepared for Placer Dome Exploration, San Franscisco, California, 73 p.

  • Deposit

    Avalon Development Corp., 1998, Colorado Creek project, Ophir and Medfra quadrangles, southwest Alaska: report prepared for NovaGold Resources Inc., 9 p.

  • Deposit

    Duncan, R.G., 1999, Colorado Creek project, Alaska, interim report: unpublished report for Poseidon Minerals Ltd., 22 p.

  • Deposit

    Dashevsky, S.S., 2000, Colorado Creek project (Au) Innoko district, Alaska: unpublished report for Rosander Mining Company, 7 p.

Comments on the references

  • Primary Reference = Duncan, 1999

General comments

Subject category Comment text
Deposit Model Name = Epithermal Au (Cox and Singer, 1986; model 25b, 25c?)
Deposit Model Number = 25b, 25c?
Deposit Other Comments = For more information, contact Ron Rosander in McGrath, AK.

Reporter information

Type Date Name Affiliation Comment
Reporter 07-AUG-01 Cameron, C.E. Northern Associates Inc.