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Syenite Gulch Occurrence, Fairhaven Mining District, Northwest Arctic Borough, Alaska, USAi
Regional Level Types
Syenite Gulch OccurrenceOccurrence
Fairhaven Mining DistrictMining District
Northwest Arctic BoroughBorough
AlaskaState
USACountry

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Latitude & Longitude (WGS84):
65° 28' 47'' North , 161° 13' 48'' West
Latitude & Longitude (decimal):
65.47972,-161.23000
GeoHash:
G#: b7tke05zh
GRN:
N44W51
Type:
Occurrence
Köppen climate type:
Dfc : Subarctic climate
Nearest Settlements:
PlacePopulationDistance
Buckland431 (2017)55.7km
Mindat Locality ID:
200267
Long-form identifier:
mindat:1:2:200267:8
GUID (UUID V4):
0


Stream gradient over 200 feet per mile.
Location: This occurrence is at an elevation of about 1,600 feet, approximately 2.5 miles north of Granite Mountain. The site is in section 19, T. 1 N., R. 12 W., of the Kateel River Meridian. Cobb, 1972 (MF-389), location 33.
Geology: At this occurrence, uranothoriate and thorite(?) occur in stream sediments overlying monzonite or syenite of the Late Cretaceous Granite Mountain pluton (Gault and others, 1953). Samples from prospect pits indicate that the amount of radioactivity decreases with depth. The highest equivalent uranium value from the samples was 0.088%.
Workings: In 1947, the U.S. Geological Survey sampled the creek to evaluate the radioactive mineral potential.
Age: Late Cretaceous.

Commodities (Major) - Radioactive minerals
Development Status: None
Deposit Model: Radioactive minerals in stream sediments.

Select Mineral List Type

Standard Detailed Gallery Strunz Chemical Elements

Mineral List


2 valid minerals.

Rock Types Recorded

Note: data is currently VERY limited. Please bear with us while we work towards adding this information!

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Alphabetical List Tree Diagram

Gallery:

List of minerals arranged by Strunz 10th Edition classification

Group 4 - Oxides and Hydroxides
ⓘThorianite4.DL.05ThO2
ⓘvar. Uranothorianite4.DL.05(Th,U)O2
Group 9 - Silicates
ⓘThorite ?9.AD.30Th(SiO4)

List of minerals for each chemical element

OOxygen
Oⓘ ThorianiteThO2
Oⓘ ThoriteTh(SiO4)
Oⓘ Thorianite var. Uranothorianite(Th,U)O2
SiSilicon
Siⓘ ThoriteTh(SiO4)
ThThorium
Thⓘ ThorianiteThO2
Thⓘ ThoriteTh(SiO4)
Thⓘ Thorianite var. Uranothorianite(Th,U)O2
UUranium
Uⓘ Thorianite var. Uranothorianite(Th,U)O2

Other Databases

Link to USGS - Alaska:CA017

Other Regions, Features and Areas containing this locality

North AmericaContinent
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

Cobb, E.H., 1972, Metallic mineral resources map of the Candle Quadrangle, Alaska: U.S. Geological Survey Miscellaneous Field Studies Map MF-389, 1 sheet, scale 1:250,000. Cobb, E.H., 1976, Summary of references to mineral occurrences (other than mineral fuels and construction materials) in the Candle, Holy Cross, Norton Bay, Nulato, and Unalakleet quadrangles, Alaska: U.S. Geological Survey Open-File Report 76-866, 102 p. Gault, H.R., Killeen, P.L., West, W.S., and others, 1953, Reconnaissance for radioactive deposits in the northeastern part of the Seward Peninsula, Alaska, 1945-47 and 1951: U.S. Geological Survey Circular 250, 31 p.
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