Unnamed Occurrence (ARDF - JU249; east of mouth of Hawk Inlet), Admiralty Mining District, Juneau, Alaska, USAi
Regional Level Types | |
---|---|
Unnamed Occurrence (ARDF - JU249; east of mouth of Hawk Inlet) | - not defined - |
Admiralty Mining District | Mining District |
Juneau | City Borough |
Alaska | State |
USA | Country |
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Latitude & Longitude (WGS84):
58° 6' 6'' North , 134° 40' 37'' West
Latitude & Longitude (decimal):
KΓΆppen climate type:
Nearest Settlements:
Place | Population | Distance |
---|---|---|
Juneau | 32,756 (2017) | 26.9km |
Mindat Locality ID:
200968
Long-form identifier:
mindat:1:2:200968:4
GUID (UUID V4):
fdc01eee-3dd9-484f-8996-337805448eea
Location: This occurrence is at an elevation of approximately 2,300 feet on a feature locally called Mariposite Ridge. It is 3 miles southeast of the Hawk Inlet docks and transfer facility, 5 miles west of Eagle Peak, and 2 miles northwest of the Greens Creek Mine (JU253). It is near the center of the NE1/4 section 31, T. 43 S., R. 66 E. of the Copper River Meridian. The location is accurate within 1/4 mile.
Geology: This occurrence consists of a persistent shear zone in carbonate rocks that contains 5 to 10 percent mariposite and pyrite-bearing quartz stringers. Samples collected in 1983 contained traces of zinc, arsenic, cadmium, and antimony (Wells and others, 1986). The rocks in the general area are mainly Ordovician and Devonian to Triassic, clastic units, mafic-intermediate volcanic rocks, and subordinate limestone. The bedded rocks are intruded and locally metamorphosed by Cretaceous granodiorite (Gehrels and Berg, 1994).
Commodities (Major) - As, Cd, Sb, Zn
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
3 valid minerals.
Detailed Mineral List:
β Muscovite Formula: KAl2(AlSi3O10)(OH)2 |
β Muscovite var. Mariposite Formula: K(Al,Cr)2(Al,Si)4O10(OH)2 |
β Muscovite var. Phengite Formula: KAl1.5(Mg,Fe)0.5(Al0.5Si3.5O10)(OH)2 |
β Pyrite Formula: FeS2 |
β Quartz Formula: SiO2 |
Gallery:
List of minerals arranged by Strunz 10th Edition classification
Group 2 - Sulphides and Sulfosalts | |||
---|---|---|---|
β | Pyrite | 2.EB.05a | FeS2 |
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. Phengite | 9.EC.15 | KAl1.5(Mg,Fe)0.5(Al0.5Si3.5O10)(OH)2 |
β | var. Mariposite | 9.EC.15 | K(Al,Cr)2(Al,Si)4O10(OH)2 |
List of minerals for each chemical element
H | Hydrogen | |
---|---|---|
H | β Muscovite | KAl2(AlSi3O10)(OH)2 |
H | β Muscovite var. Phengite | KAl1.5(Mg,Fe)0.5(Al0.5Si3.5O10)(OH)2 |
H | β Muscovite var. Mariposite | K(Al,Cr)2(Al,Si)4O10(OH)2 |
O | Oxygen | |
O | β Muscovite | KAl2(AlSi3O10)(OH)2 |
O | β Muscovite var. Phengite | KAl1.5(Mg,Fe)0.5(Al0.5Si3.5O10)(OH)2 |
O | β Quartz | SiO2 |
O | β Muscovite var. Mariposite | K(Al,Cr)2(Al,Si)4O10(OH)2 |
Mg | Magnesium | |
Mg | β Muscovite var. Phengite | KAl1.5(Mg,Fe)0.5(Al0.5Si3.5O10)(OH)2 |
Al | Aluminium | |
Al | β Muscovite | KAl2(AlSi3O10)(OH)2 |
Al | β Muscovite var. Phengite | KAl1.5(Mg,Fe)0.5(Al0.5Si3.5O10)(OH)2 |
Al | β Muscovite var. Mariposite | K(Al,Cr)2(Al,Si)4O10(OH)2 |
Si | Silicon | |
Si | β Muscovite | KAl2(AlSi3O10)(OH)2 |
Si | β Muscovite var. Phengite | KAl1.5(Mg,Fe)0.5(Al0.5Si3.5O10)(OH)2 |
Si | β Quartz | SiO2 |
Si | β Muscovite var. Mariposite | K(Al,Cr)2(Al,Si)4O10(OH)2 |
S | Sulfur | |
S | β Pyrite | FeS2 |
K | Potassium | |
K | β Muscovite | KAl2(AlSi3O10)(OH)2 |
K | β Muscovite var. Phengite | KAl1.5(Mg,Fe)0.5(Al0.5Si3.5O10)(OH)2 |
K | β Muscovite var. Mariposite | K(Al,Cr)2(Al,Si)4O10(OH)2 |
Cr | Chromium | |
Cr | β Muscovite var. Mariposite | K(Al,Cr)2(Al,Si)4O10(OH)2 |
Fe | Iron | |
Fe | β Muscovite var. Phengite | KAl1.5(Mg,Fe)0.5(Al0.5Si3.5O10)(OH)2 |
Fe | β Pyrite | FeS2 |
Other Databases
Link to USGS - Alaska: | JU249 |
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Other Regions, Features and Areas containing this locality
North America PlateTectonic Plate
- Alexander DomainDomain
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