Brown Bear; Old Harbor; Silver Queen; Barling Bay Prospect, Kodiak Mining District, Kodiak Island Borough, Alaska, USAi
Regional Level Types | |
---|---|
Brown Bear; Old Harbor; Silver Queen; Barling Bay Prospect | Prospect |
Kodiak Mining District | Mining District |
Kodiak Island Borough | Borough |
Alaska | State |
USA | Country |
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Latitude & Longitude (WGS84):
57° 12' 43'' North , 153° 23' 9'' West
Latitude & Longitude (decimal):
Type:
Köppen climate type:
Nearest Settlements:
Place | Population | Distance |
---|---|---|
Old Harbor | 221 (2017) | 4.9km |
Mindat Locality ID:
196674
Long-form identifier:
mindat:1:2:196674:2
GUID (UUID V4):
5661b55e-74b5-47d1-b01e-ba20cd603176
Most of the area is on land conveyed to the Koniag Corporation.
Location: This prospect is located 0.3 mile north of triangulation station Love at the head of Barling Bay (Berg and Cobb, 1967, figure 15, locality 13; Cobb, 1972, MF 460, locality 5; McGee, 1972, locality 1; MacKevett and Holloway, 1977, locality 5) Site location is accurate to within 1/4 mile.
Geology: Three separate sulfide-bearing quartz veins, the Brown Bear, Old Harbor, and Silver Queen, cut Cretaceous metasedimentary rock. The Brown Bear vein, said to have been traced for several miles, strikes northeast, generally parallel to bedding. The dip is irregular and varies from 90 to 15 southeast. At one point the vein has a thickness of 15 feet. At another the vein splits into 3 bands 18 inches, 30 inches, and 6 feet in thickness. Assays of nine samples taken by Roehm ( 1936, PE 131-5) on the Brown Bear vein ranged from trace gold, trace silver over 32 inches to 0.58 ounce per ton gold and 0.30 ounce per ton silver over 12 inches. A basic dike, an aplite dike, and a porphyry dike crop out in the vicinity of the vein. The Old Harbor vein crops out approximately 400 feet above the Brown Bear. It averages 5 feet in thickness and is said to have been traced for 3000 feet. No descriptions of the Silver Queen vein are available.
Workings: The Brown Bear vein in 1936 had been developed by a 42-foot adit, a 23-foot adit and several open cuts. Open cuts and pits exposed some of the other veins. Nine samples taken by Roehm (1936, PE 131-5) on the Brown Bear vein assayed from trace gold and silver over 32 inches to 0.58 ounce per ton gold and 0.30 ounce per ton silver over 12 inches.
Age: Cretaceous or younger
Commodities (Major) - Ag, Au
Development Status: Undetermined.
Deposit Model: Chugach-type low-sulfide gold-quartz vein (Bliss, 1992; model 36a.1), turbidite
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:
ⓘ Arsenopyrite Formula: FeAsS |
ⓘ 'Chlorite Group' |
ⓘ Gold Formula: Au |
ⓘ Muscovite Formula: KAl2(AlSi3O10)(OH)2 |
ⓘ Muscovite var. Sericite Formula: KAl2(AlSi3O10)(OH)2 |
ⓘ Pyrite Formula: FeS2 |
ⓘ Pyrrhotite Formula: Fe1-xS |
ⓘ Quartz Formula: SiO2 |
Gallery:
List of minerals arranged by Strunz 10th Edition classification
Group 1 - Elements | |||
---|---|---|---|
ⓘ | Gold | 1.AA.05 | Au |
Group 2 - Sulphides and Sulfosalts | |||
ⓘ | Pyrrhotite | 2.CC.10 | Fe1-xS |
ⓘ | Pyrite | 2.EB.05a | FeS2 |
ⓘ | Arsenopyrite | 2.EB.20 | FeAsS |
Group 4 - Oxides and Hydroxides | |||
ⓘ | Quartz | 4.DA.05 | SiO2 |
Group 9 - Silicates | |||
ⓘ | Muscovite | 9.EC.15 | KAl2(AlSi3O10)(OH)2 |
ⓘ | var. Sericite | 9.EC.15 | KAl2(AlSi3O10)(OH)2 |
Unclassified | |||
ⓘ | 'Chlorite Group' | - |
List of minerals for each chemical element
H | Hydrogen | |
---|---|---|
H | ⓘ Muscovite | KAl2(AlSi3O10)(OH)2 |
H | ⓘ Muscovite var. Sericite | KAl2(AlSi3O10)(OH)2 |
O | Oxygen | |
O | ⓘ Muscovite | KAl2(AlSi3O10)(OH)2 |
O | ⓘ Quartz | SiO2 |
O | ⓘ Muscovite var. Sericite | KAl2(AlSi3O10)(OH)2 |
Al | Aluminium | |
Al | ⓘ Muscovite | KAl2(AlSi3O10)(OH)2 |
Al | ⓘ Muscovite var. Sericite | KAl2(AlSi3O10)(OH)2 |
Si | Silicon | |
Si | ⓘ Muscovite | KAl2(AlSi3O10)(OH)2 |
Si | ⓘ Quartz | SiO2 |
Si | ⓘ Muscovite var. Sericite | KAl2(AlSi3O10)(OH)2 |
S | Sulfur | |
S | ⓘ Arsenopyrite | FeAsS |
S | ⓘ Pyrite | FeS2 |
S | ⓘ Pyrrhotite | Fe1-xS |
K | Potassium | |
K | ⓘ Muscovite | KAl2(AlSi3O10)(OH)2 |
K | ⓘ Muscovite var. Sericite | KAl2(AlSi3O10)(OH)2 |
Fe | Iron | |
Fe | ⓘ Arsenopyrite | FeAsS |
Fe | ⓘ Pyrite | FeS2 |
Fe | ⓘ Pyrrhotite | Fe1-xS |
As | Arsenic | |
As | ⓘ Arsenopyrite | FeAsS |
Au | Gold | |
Au | ⓘ Gold | Au |
Other Databases
Link to USGS - Alaska: | KD029 |
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Other Regions, Features and Areas containing this locality
North America PlateTectonic Plate
- Chugach DomainDomain
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