High Grade; Golden Sunlight Mine, Prince William Sound Mining District, Valdez-Cordova Census Area, Alaska, USAi
Regional Level Types | |
---|---|
High Grade; Golden Sunlight Mine | Mine |
Prince William Sound Mining District | Mining District |
Valdez-Cordova Census Area | Census Area |
Alaska | State |
USA | Country |
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Latitude & Longitude (WGS84):
61° 11' 38'' North , 146° 20' 24'' West
Latitude & Longitude (decimal):
Type:
KΓΆppen climate type:
Nearest Settlements:
Place | Population | Distance |
---|---|---|
Valdez | 3,870 (2017) | 7.0km |
Mindat Locality ID:
197968
Long-form identifier:
mindat:1:2:197968:1
GUID (UUID V4):
187abe55-74bb-4346-b62d-9e1eae2c8334
Location: This prospect, locality 26 of Cobb and Matson (1972), is near Mineral Creek about one-third mile north of the mouth of Wood Creek in section 8, T. 8 S., R. 6 W., of the Copper River Meridian. It is approximately located, perhaps within 1 mile.
Geology: Iron-stained and gold-bearing quartz veins in shear zones cut metaflysch of the Valdez Group (Brooks, 1912; Johnson, 1915). The 2- to 3-foot-thick shear zones contain quartz-carbonate veins that are less than 3 inches thick. The veins contain pyrite and galena (Johnson, 1915). Two adits, one 60 feet long and the other 140 feet long in 1914, explored these veins (Johnson, 1915). These veins are probably similar to other gold-bearing quartz veins cutting metaflysch of the Valdez Group in the southern Valdez quadrangle. Data summarized by Goldfarb and others (1997) show that gold-bearing quartz veins in the Valdez Group commonly contain pyrite, arsenopyrite, carbonate minerals, chlorite, and white mica and formed from water-rich fluids with 5 to 15 mole percent CO2 and significant amounts of CH4, N2, and H2S. The vein-forming fluid salinities were less than 8 percent, vein formation temperatures ranged from 225 to 375 degrees centigrade, and emplacement depths varied from 3 to 10 kilometers. The vein-forming fluids were produced by metamorphic devolatization reactions. Radiometric dating indicates that the veins formed from 57 to 49 Ma (Goldfarb and others, 1997, p. 171), when deep parts of the accreted Valdez Group flysch underwent high-grade metamorphism and partial melting (Hudson, 1994).
Workings: Two adits, one 60 feet long and the other 140 feet long in 1914, explored these deposits (Johnson, 1915).
Age: Radiometric dating indicates that the gold-bearing quartz veins in the Valdez Group formed from 57 to 49 Ma (Goldfarb and others, 1997, p. 171), when deep parts of the accreted Valdez Group flysch underwent high-grade metamorphism and partial melting (Hudson, 1994).
Alteration: Oxidation; the quartz veins are iron-stained. Country rocks to gold-bearing quartz veins in Valdez Group metaflysch can be variably silicified, carbonitized, and sericitized (Goldfarb and others, 1997).
Commodities (Major) - Au; (Minor) - Pb
Development Status: Undetermined.
Deposit Model: Low-sulfide Au-quartz veins (Cox and Singer, 1986; model 36a)
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
6 valid minerals.
Detailed Mineral List:
β Arsenopyrite Formula: FeAsS |
β 'Chlorite Group' |
β Galena Formula: PbS |
β Gold Formula: Au |
β 'Limonite' |
β Muscovite Formula: KAl2(AlSi3O10)(OH)2 |
β Muscovite var. Sericite Formula: KAl2(AlSi3O10)(OH)2 |
β Pyrite Formula: FeS2 |
β Quartz Formula: SiO2 |
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 | Galena | 2.CD.10 | PbS |
β | Pyrite | 2.EB.05a | FeS2 |
β | Arsenopyrite | 2.EB.20 | FeAsS |
Group 4 - Oxides and Hydroxides | |||
β | Quartz | 4.DA.05 | SiO2 |
Group 9 - Silicates | |||
β | Muscovite | 9.EC.15 | KAl2(AlSi3O10)(OH)2 |
β | var. Sericite | 9.EC.15 | KAl2(AlSi3O10)(OH)2 |
Unclassified | |||
β | 'Chlorite Group' | - | |
β | 'Limonite' | - |
List of minerals for each chemical element
H | Hydrogen | |
---|---|---|
H | β Muscovite | KAl2(AlSi3O10)(OH)2 |
H | β Muscovite var. Sericite | KAl2(AlSi3O10)(OH)2 |
O | Oxygen | |
O | β Muscovite | KAl2(AlSi3O10)(OH)2 |
O | β Quartz | SiO2 |
O | β Muscovite var. Sericite | KAl2(AlSi3O10)(OH)2 |
Al | Aluminium | |
Al | β Muscovite | KAl2(AlSi3O10)(OH)2 |
Al | β Muscovite var. Sericite | KAl2(AlSi3O10)(OH)2 |
Si | Silicon | |
Si | β Muscovite | KAl2(AlSi3O10)(OH)2 |
Si | β Quartz | SiO2 |
Si | β Muscovite var. Sericite | KAl2(AlSi3O10)(OH)2 |
S | Sulfur | |
S | β Arsenopyrite | FeAsS |
S | β Galena | PbS |
S | β Pyrite | FeS2 |
K | Potassium | |
K | β Muscovite | KAl2(AlSi3O10)(OH)2 |
K | β Muscovite var. Sericite | KAl2(AlSi3O10)(OH)2 |
Fe | Iron | |
Fe | β Arsenopyrite | FeAsS |
Fe | β Pyrite | FeS2 |
As | Arsenic | |
As | β Arsenopyrite | FeAsS |
Au | Gold | |
Au | β Gold | Au |
Pb | Lead | |
Pb | β Galena | PbS |
Other Databases
Link to USGS - Alaska: | VA120 |
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Other Regions, Features and Areas containing this locality
North America PlateTectonic Plate
- Chugach DomainDomain
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