Unnamed Occurrence (ARDF - MH029; west of the upper West Fork Maclaren River), Valdez Creek Mining District, Matanuska-Susitna Borough, Alaska, USAi
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Latitude & Longitude (WGS84):
63° 19' 9'' North , 146° 46' 15'' West
Latitude & Longitude (decimal):
Köppen climate type:
Mindat Locality ID:
201179
Long-form identifier:
mindat:1:2:201179:3
GUID (UUID V4):
00c94c3d-e4a2-403e-9106-30999cf64ff9
Location: This occurrence is at an elevation of about 5,500 feet on the ridge between a major west tributary to the West Fork and the West Fork Maclaren River and about one-quarter mile west-northwest of peak 6222, near the common corner of sections 27, 28, 33, and 34, T. 19 S., R. 5 E., Fairbanks Meridian. The site corresponds to locality 20 in table 2 of Nokleberg and others (1991). The location is probably accurate within one-half mile.
Geology: The rock near the occurrence consists of white mica phyllite of the Maclaren Glacier metamorphic belt (Nokleberg and others, 1982). The phyllite is pyritic and in places stained with malachite. Copper was not detected in one sample that, however, contained 7 parts per million (ppm) silver and 50 ppm molybdenum (Nokleberg and others, 1991, locality 20, table 2).
Workings: There are no workings. The occurrence was found during regional mapping and sampling (Nokleberg and others, 1991).
Age: Possibly syngenetic to protolith of white mica (sericite?) in phyllite.
Alteration: Oxidation of iron- and copper-bearing minerals.
Commodities (Major) - Ag; (Minor) - Cu, Mo
Development Status: None
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:
ⓘ Malachite Formula: Cu2(CO3)(OH)2 |
ⓘ Muscovite Formula: KAl2(AlSi3O10)(OH)2 |
ⓘ Muscovite var. Sericite Formula: KAl2(AlSi3O10)(OH)2 |
ⓘ Pyrite Formula: FeS2 |
ⓘ Quartz Formula: SiO2 |
Gallery:
List of minerals arranged by Strunz 10th Edition classification
Group 2 - Sulphides and Sulfosalts | |||
---|---|---|---|
ⓘ | Pyrite | 2.EB.05a | FeS2 |
Group 4 - Oxides and Hydroxides | |||
ⓘ | Quartz | 4.DA.05 | SiO2 |
Group 5 - Nitrates and Carbonates | |||
ⓘ | Malachite | 5.BA.10 | Cu2(CO3)(OH)2 |
Group 9 - Silicates | |||
ⓘ | Muscovite | 9.EC.15 | KAl2(AlSi3O10)(OH)2 |
ⓘ | var. Sericite | 9.EC.15 | KAl2(AlSi3O10)(OH)2 |
List of minerals for each chemical element
H | Hydrogen | |
---|---|---|
H | ⓘ Malachite | Cu2(CO3)(OH)2 |
H | ⓘ Muscovite | KAl2(AlSi3O10)(OH)2 |
H | ⓘ Muscovite var. Sericite | KAl2(AlSi3O10)(OH)2 |
C | Carbon | |
C | ⓘ Malachite | Cu2(CO3)(OH)2 |
O | Oxygen | |
O | ⓘ Malachite | Cu2(CO3)(OH)2 |
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 | ⓘ Pyrite | FeS2 |
K | Potassium | |
K | ⓘ Muscovite | KAl2(AlSi3O10)(OH)2 |
K | ⓘ Muscovite var. Sericite | KAl2(AlSi3O10)(OH)2 |
Fe | Iron | |
Fe | ⓘ Pyrite | FeS2 |
Cu | Copper | |
Cu | ⓘ Malachite | Cu2(CO3)(OH)2 |
Other Databases
Link to USGS - Alaska: | MH029 |
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Other Regions, Features and Areas containing this locality
North America PlateTectonic Plate
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