Latitude & Longitude (WGS84):
63° 18' 32'' North , 145° 58' 47'' West
Latitude & Longitude (decimal):
Mindat Locality ID:
201232
Long-form identifier:
mindat:1:2:201232:5
Location: This occurrence is at an elevation of about 4,350 feet at the head of an unmapped east -flowing tributary of North Fork Rainy Creek. It is in the NW1/4SW1/4 section 35, T. 18 S., R. 9 E., Fairbanks Meridian. It corresponds to locality S65 in table 2 of Nokleberg and others (1991).
Geology: This occurrence is in Late Triassic gabbro that intrudes the Slana Spur Formation of Pennsylvanian age (Nokleberg and others, 1991). The occurrence consists of a silicified zone 6.5 feet wide by 10 feet long in gabbro. Grab sample 79NK014B collected by the U.S. Geological Survey contains more than 5,000 parts per million chromium (Nokleberg and others, 1991). Chromite is probably sparsely disseminated in gabbro at the site.
Workings: The occurrence is on active claims of MAN Resources.
Age: Late Triassic.
Alteration: The alteration consists of a silicified zone 2 meters wide by 3 meters long in the gabbro.
Commodities (Major) - Cr
Development Status: No
Deposit Model: Disseminated chromite in a layered mafic-ultramafic complex.
Select Mineral List Type
Standard
Detailed Gallery
Strunz
Chemical Elements
Commodity List
This is a list of exploitable or exploited mineral commodities recorded at this locality.Mineral List
1 valid mineral.
Gallery:
List of minerals arranged by Strunz 10th Edition classification
| Group 4 - Oxides and Hydroxides |
|---|
| ⓘ | Chromite | 4.BB.05 | Fe2+Cr3+2O4 |
List of minerals for each chemical element
Other Databases
| Link to USGS - Alaska: | MH147 |
|---|
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References
Nokleberg, W.J., Lange, I.M., Roback, R.C., Yeend, Warren, and Silva, S.R., 1991, Map showing locations of metalliferous lode and placer mineral occurrences, mineral deposits, prospects, and mines, Mount Hayes quadrangle, eastern Alaska Range, Alaska: U.S. Geological Survey Miscellaneous Field Studies Map MF-1996-C, 42 p., 1 sheet, scale 1:250,000.
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To cite: Ralph, J., Von Bargen, D., Martynov, P., Zhang, J., Que, X., Prabhu, A., Morrison, S. M., Li, W., Chen, W., & Ma, X. (2025). Mindat.org: The open access mineralogy database to accelerate data-intensive geoscience research. American Mineralogist, 110(6), 833–844.
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