Aukney Prospect, Bristol Bay Mining District, Lake and Peninsula Borough, Alaska, USAi
Regional Level Types | |
---|---|
Aukney Prospect | Prospect |
Bristol Bay Mining District | Mining District |
Lake and Peninsula Borough | Borough |
Alaska | State |
USA | Country |
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Latitude & Longitude (WGS84):
59° 25' 7'' North , 155° 13' 11'' West
Latitude & Longitude (decimal):
Type:
KΓΆppen climate type:
Mindat Locality ID:
196336
Long-form identifier:
mindat:1:2:196336:9
GUID (UUID V4):
ff9b1c9b-c7c7-41fa-a9b4-fbe16722144b
Location: The Aukney prospect is near lake level on the south shore of Lake Iliamna north of Big Mountain, about 1.7 miles west-southwest of Eagle Bluff. For this record, it is on the shoreline of the lake, in the NW1/4 sec. 8, T. 9 S., R. 35 W., Seward Meridian. The accuracy is uncertain; the prospect could be about a mile farther west-southwest, in the Iliamna B-7 quadrangle (see Geologic description).
Geology: Rocks tentatively mapped as Jurassic Talkeetna Formation strike east-northeast and are exposed in outcrops along Lake Iliamna north of Big Mountain, a volcanic massif of Tertiary age (Reed and Detterman, 1980). Rocks exposed along the shoreline to the west-southwest are undivided Tertiary volcanic rocks. Martin and Katz (1910, p. 198) described the rocks at the Aukney prospect as tuffaceous and cherty beds containing finely disseminated pyrite. The beds strike northeast and dip 75SE to vertical. If these rocks are the Talkeetna Formation as mapped by Detterman and Reed (1980), this record's location of the site is probably accurate. If the strata are Tertiary, however, the claim could be about a mile to the west-southwest. The deposit was prospected by blasting the shoreline cliffs (Martin and Katz, 1910, 1912). The cliffs are stained yellow, probably by jarosite, a common component of limonite formed by the oxidation of pyrite-rich deposits.
Workings: The Aukney claim was located on October 16, 1908 (Martin and Katz, 1910; 1912). The only work reported was blasting the shoreline cliff face.
Age: Jurassic or Tertiary, depending on the age of the volcanic hostrock.
Alteration: Pyritization of tuff and chert.
Commodities (Major) - Au?
Development Status: None
Select Mineral List Type
Standard Detailed Gallery Strunz Chemical ElementsDetailed Mineral List:
β Gold ? Formula: Au |
β Jarosite Formula: KFe3+3(SO4)2(OH)6 |
β 'Limonite' |
β Pyrite Formula: FeS2 |
Gallery:
List of minerals arranged by Strunz 10th Edition classification
Group 1 - Elements | |||
---|---|---|---|
β | Gold ? | 1.AA.05 | Au |
Group 2 - Sulphides and Sulfosalts | |||
β | Pyrite | 2.EB.05a | FeS2 |
Group 7 - Sulphates, Chromates, Molybdates and Tungstates | |||
β | Jarosite | 7.BC.10 | KFe3+3(SO4)2(OH)6 |
Unclassified | |||
β | 'Limonite' | - |
List of minerals for each chemical element
H | Hydrogen | |
---|---|---|
H | β Jarosite | KFe33+(SO4)2(OH)6 |
O | Oxygen | |
O | β Jarosite | KFe33+(SO4)2(OH)6 |
S | Sulfur | |
S | β Jarosite | KFe33+(SO4)2(OH)6 |
S | β Pyrite | FeS2 |
K | Potassium | |
K | β Jarosite | KFe33+(SO4)2(OH)6 |
Fe | Iron | |
Fe | β Jarosite | KFe33+(SO4)2(OH)6 |
Fe | β Pyrite | FeS2 |
Au | Gold | |
Au | β Gold | Au |
Other Databases
Link to USGS - Alaska: | IL031 |
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Other Regions, Features and Areas containing this locality
North America PlateTectonic Plate
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