Halibut Bay 50 Occurrence, Kodiak Mining District, Kodiak Island Borough, Alaska, USAi
| Regional Level Types | |
|---|---|
| Halibut Bay 50 Occurrence | Occurrence |
| Kodiak Mining District | Mining District |
| Kodiak Island Borough | Borough |
| Alaska | State |
| USA | Country |
This page is currently not sponsored. Click here to sponsor this page.
Latitude & Longitude (WGS84):
57° 21' 46'' North , 154° 35' 56'' West
Latitude & Longitude (decimal):
Type:
Köppen climate type:
Site is located within Kodiak National Wildlife Refuge.
Location: This occurrence is located 5.3 miles north of Anvil Mountain in sec. 32, T. 32 S., R. 33 W., of the Seward Meridian (Foley and Barker, figure 25, 1985, locality 50; Foley and others, 1989, locality 32). Site location is accurate to within several hundred feet.
Geology: At this chromite occurrence, one of several in the Halibut Bay ultramafic complex, chromite is present as bands less than 1 inch in thickness, as disseminations, and as massive segregations up to 6 inches across. The mineralized zone is inferred to measure 450 by 5 feet and to have a dip length of 112 feet. The zone strikes N. 5 W. and dips 55 W. The deposit is estimated to contain 26,000 tons of rock grading 6 percent chromite (Foley and Barker, 1985, table 13). A channel sample across a 3-foot stringer zone assayed 14.84 percent chrome. A bulk sample had a head grade of 21.2 percent chromite and a gravity concentrate grade of 53.5 percent chromite. The concentrate had a chrome:iron ratio of 2.6 and contained traces of silver, gold, platinum, and palladium (Dahlin and others, 1985, table A-30). Small showings of chromite were observed 70 feet upslope and 200 feet downslope from the main zone. The Halibut Bay ultramafic complex, consisting mostly of gabbro, dunite, pyroxenite, and peridotite, occurs within sedimentary units of the Uyak formation of Cretaceous age.
Workings: The deposit is estimated to contain 26,000 tons of rock grading 6 percent chromite. A bulk sample had a head grade of 21.2 percent chromite and a gravity concentrate grade of 53.5 percent chromite, with a chrome:iron ratio of 2.6.
Alteration: The ultramafic country rock is serpentinized?
Reserves: The deposit is estimated to contain 26,000 tons of rock grading 6 percent chromite.
Commodities (Major) - Cr
Development Status: None
Deposit Model: Podiform chromite (Cox and Singer, 1986; model 8b).
Select Mineral List Type
Standard Detailed Gallery Strunz Chemical ElementsCommodity 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
| O | Oxygen | |
|---|---|---|
| O | ⓘ Chromite | Fe2+Cr23+O4 |
| Cr | Chromium | |
| Cr | ⓘ Chromite | Fe2+Cr23+O4 |
| Fe | Iron | |
| Fe | ⓘ Chromite | Fe2+Cr23+O4 |
Other Databases
| Link to USGS - Alaska: | KR025 |
|---|
Other Regions, Features and Areas containing this locality
This page contains all mineral locality references listed on mindat.org. This does not claim to be a complete list. If you know of more minerals from this site, please register so you can add to our database. This locality information is for reference purposes only. You should never attempt to
visit any sites listed in mindat.org without first ensuring that you have the permission of the land and/or mineral rights holders
for access and that you are aware of all safety precautions necessary.
