Vote for your favorite mineral in #MinCup26! - Quartz vs. Asagiite
It's a classic vs a newbie as the most common named mineral in the crust Quartz is up against an exceedingly-rare sea foam-green mineral discovered just a few years ago Asagiite.
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Unnamed Occurrence (ARDF - BN127; upper Ophir Creek), Council Mining District, Nome Census Area, Alaska, USAi
Regional Level Types
Unnamed Occurrence (ARDF - BN127; upper Ophir Creek)- not defined -
Council Mining DistrictMining District
Nome Census AreaCensus Area
AlaskaState
USACountry

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Latitude & Longitude (WGS84):
65° 3' 28'' North , 163° 41' 31'' West
Latitude & Longitude (decimal):
65.05778,-163.69194
GeoHash:
G#: b7ed557jj
GRN:
N44W52
Köppen climate type:
Dfc : Subarctic climate
Nearest Settlements:
PlacePopulationDistance
White Mountain196 (2017)44.0km
Mindat Locality ID:
200564
Long-form identifier:
mindat:1:2:200564:8
GUID (UUID V4):
0


Location: This occurrence is in bedrock exposures along upper Ophir Creek (BN099) about 3.4 miles upstream of its confluence with Crooked Creek. This is at the confluence of upper Ophir Creek and Flat Creek. It is locality 77 of Gamble (1988). As shown by Gamble (1988), it is just upstream of old placer mine workings (BN106).
Geology: Gamble (1988) reports that a calcite vein in marble contains 0.25 ppb gold at this locality. Bedrock exposures are limited in this area; this occurrence may be close to a regional contact between lower Paleozoic mafic metavolcanic and metasedimentary assemblages (Till and others, 1986).
Workings: No workings or exploration activities are known at this locality.
Age: Cretaceous ?; epigenetic mineralization in metamorphic rocks of Seward Peninsula is primarily Cretaceous in age.
Alteration: Calcite veining.

Commodities (Major) - Au
Development Status: None
Deposit Model: Calcite vein in marble

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 5 - Nitrates and Carbonates
ⓘCalcite5.AB.05CaCO3

List of minerals for each chemical element

CCarbon
Cⓘ CalciteCaCO3
OOxygen
Oⓘ CalciteCaCO3
CaCalcium
Caⓘ CalciteCaCO3

Other Databases

Link to USGS - Alaska:BN127

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

Gamble, B.M., 1988, Non-placer mineral occurrences in the Solomon, Bendeleben, and southern part of the Kotzebue quadrangles, western Alaska: U.S. Geological Survey Miscellaneous Field Studies Map MF-1838-B, 13 p., 1 sheet, scale 1:250,000. Till, A.B., Dumoulin, J.A., Gamble, B. ., Kaufman, D.S., and Carroll, P.I., 1986, Preliminary geologic map and fossil data, Soloman, Bendeleben, and southern Kotzebue quadrangles, Seward Peninsula, Alaska: U.S. Geological Survey Open-File Report 86-276, 10 p., 3 plates, scale 1:250,000.
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