Halibut Bay 51 Occurrence, Kodiak Mining District, Kodiak Island Borough, Alaska, USAi
| Regional Level Types | |
|---|---|
| Halibut Bay 51 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° 22' 8'' North , 154° 35' 31'' West
Latitude & Longitude (decimal):
Type:
Köppen climate type:
Mindat Locality ID:
197890
Long-form identifier:
mindat:1:2:197890:5
GUID (UUID V4):
f690aa92-16dd-4da3-9701-a002ce0466b4
Site is located within Kodiak National Wildlife Refuge.
Location: This occurrence is located 5.6 miles north of Anvil Mountain in sec. 28, T. 32 S., R. 33 W., of the Seward Meridian (Foley and Barker, 1985, figure 25, locality 51; Foley and others, 1989, locality 32). Site location is accurate to within several hundred feet.
Geology: This chromite occurrence, one of several located within the Halibut Bay ultramafic complex, consists of lenses or bands of disseminated, coalescent, and massive chromite alternating with nearly barren dunite. The mineralized zone is inferred to measure 1250 by 150 feet and to have an inferred dip length of 312 feet. The deposit is estimated to contain 6,031,000 tons of rock grading 5 percent chromite (Foley and Barker, 1985, table 13). Bulk sample head grades ranged from 23.2 to 42.1 percent chromite and gravity concentrate grades ranged from 51.6 to 56.1 percent. The concentrates gave a chrome:iron ratio ranging from 2.1 to 3.0. and contained traces of gold, silver, platinum, and palladium (Dahlin and others, 1985, tables A-31, A-32, A-33). The Halibut Bay ultramafic complex, consisting mostly of gabbro, dunite, pyroxenite, and peridodite, occurs within sedimentary units of the Uyak formation of Cretaceous age.
Workings: The deposit is estimated to contain 6,031,000 tons of rock grading 5 percent chromite. Head grades of bulk samples ranged from 23.2 to 42.1 percent chromite and gravity concentrate grades ranged from 51.6 to 56.1 percent, with chrome:iron ratios ranging from 2.1 to 3.0.
Alteration: The ultramafic country rock is serpentinized?
Reserves: The deposit is estimated to contain 6,031,000 tons of rock grading 5 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: | KR026 |
|---|
Other Regions, Features and Areas containing this locality
North America PlateTectonic Plate
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.
References
