Unnamed Prospect (ARDF - TA022; south of King Salmon River), Bristol Bay Region Mining District, Dillingham Census Area, Alaska, USAi
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Latitude & Longitude (WGS84):
60° 15' 36'' North , 158° 5' 24'' West
Latitude & Longitude (decimal):
KΓΆppen climate type:
Mindat Locality ID:
202455
Long-form identifier:
mindat:1:2:202455:7
GUID (UUID V4):
ab44ae8b-c5bf-48e8-8758-e1f244773d5c
Location: This prospect is at an elevation of about 2,700 feet on a ridgecrest in the headwaters of unnamed south tributaries to the upper King Salmon River. For this record, the map site is near the west end of the north boundary of section 23, T 2 N, R 51 W, of the Seward Meridian.
Geology: Clark and others (1970 [OF 437]) report analytical data for several rock samples collected over about 6,000 feet of this ridgecrest. The samples contain weakly to strongly anomalous concentrations of Ag (to 3 ppm), Au (to 0.7 ppm), As, B, Cu, Mo, and Hg. These samples were collected in a large area of hornfels. Clark and others (1970 [OF 438]) generally describe hornfels with anomalous metal contents as strongly limonite stained and cut by numerous small quartz veins rarely exceeding 1/8 inch in width. Some of the quartz veins carry minor amounts of arsenopyrite, and arsenopyrite is also locally disseminated in hornfels. Some scorodite and malachite are also locally present.
Workings: Reconnaissance surface observation and sampling has taken place on this prospect.
Age: Late Cretaceous. Hornfels is developed in mid-Cretaceous clastic sedimentary rocks and is probably similar in age to hornfels at the Shotgun prospect (TA007). Intrusive rocks in the area of the Shotgun prospect are about 68 to 70 Ma in age.
Alteration: Silicification and oxidation.
Commodities (Major) - Ag, Au; (Minor) - As, B, Hg
Development Status: None
Deposit Model: Polymetallic veins? (Cox and Singer, 1986; model 22c)
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
4 valid minerals.
Detailed Mineral List:
β Arsenopyrite Formula: FeAsS |
β 'Limonite' |
β Malachite Formula: Cu2(CO3)(OH)2 |
β Quartz Formula: SiO2 |
β Scorodite Formula: Fe3+AsO4 · 2H2O |
Gallery:
List of minerals arranged by Strunz 10th Edition classification
Group 2 - Sulphides and Sulfosalts | |||
---|---|---|---|
β | Arsenopyrite | 2.EB.20 | FeAsS |
Group 4 - Oxides and Hydroxides | |||
β | Quartz | 4.DA.05 | SiO2 |
Group 5 - Nitrates and Carbonates | |||
β | Malachite | 5.BA.10 | Cu2(CO3)(OH)2 |
Group 8 - Phosphates, Arsenates and Vanadates | |||
β | Scorodite | 8.CD.10 | Fe3+AsO4 Β· 2H2O |
Unclassified | |||
β | 'Limonite' | - |
List of minerals for each chemical element
H | Hydrogen | |
---|---|---|
H | β Malachite | Cu2(CO3)(OH)2 |
H | β Scorodite | Fe3+AsO4 · 2H2O |
C | Carbon | |
C | β Malachite | Cu2(CO3)(OH)2 |
O | Oxygen | |
O | β Malachite | Cu2(CO3)(OH)2 |
O | β Quartz | SiO2 |
O | β Scorodite | Fe3+AsO4 · 2H2O |
Si | Silicon | |
Si | β Quartz | SiO2 |
S | Sulfur | |
S | β Arsenopyrite | FeAsS |
Fe | Iron | |
Fe | β Arsenopyrite | FeAsS |
Fe | β Scorodite | Fe3+AsO4 · 2H2O |
Cu | Copper | |
Cu | β Malachite | Cu2(CO3)(OH)2 |
As | Arsenic | |
As | β Arsenopyrite | FeAsS |
As | β Scorodite | Fe3+AsO4 · 2H2O |
Other Databases
Link to USGS - Alaska: | TA022 |
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Other Regions, Features and Areas containing this locality
North America PlateTectonic Plate
- Farewell buried DomainDomain
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