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Avan Hills Occurrence, North Slope Borough, Alaska, USA

Location: Location plotted is locality 1 of Foley and others (1989, p. 2); in headwaters area of Avan River about 2.3 mi (3.7 km) northeast of peak 3970; located to within 2 mi (3.2 km).
Geology: Bedrock consists of variably serpentinized rocks of a Jurassic? mafic/ultramafic complex that includes dunite, wehrlite, peridotite, clinopyroxenite, and gabbro.
Workings: Platinum and palladium were detected in chromite-bearing dunite (0.014 troy oz/st Pt) and in chromite concentrates (0.016 troy oz/st Pd). Iridium was detected in a pan concentrate sample (0.0036 troy oz/st).
Age: Jurassic?
Reserves: Estimated Cr2O3 content measured in 26 deposits ranges from 465,000 to 1,734,000 short tons. The area contains at least 50 other minor or unmeasured chromite lode occurrences, and also has potential for large, low-grade chromite and PGE placer deposits.

Commodities (Major) - Cr, Platinum-group elements (PGE)
Development Status: No
Deposit Model: Podiform chromite



References:
Cobb, E.H., Mayfield, C.F., and Brosg





Map Reference: 68°15'N , 161°54'W

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Copyright © Jolyon Ralph and Ida Chau 1993-2009. Jobs in Alaska, USA Site Map. Locality, mineral & photograph data are the copyright of the individuals who submitted them.Further information contact the Site hosted & developed by Jolyon Ralph. Mindat.org is an online information resource dedicated to providing free mineralogical information to all. Mindat relies on the contributions of hundreds of members and supporters. If you would like to add information to improve the quality of our database, then click here to register. Current server date and time: 7th Nov 2009 01:10:28