Unnamed Occurrence (ARDF - TL070), Yentna Mining District, Matanuska-Susitna Borough, Alaska, USAi
| Regional Level Types | |
|---|---|
| Unnamed Occurrence (ARDF - TL070) | - not defined - |
| Yentna Mining District | Mining District |
| Matanuska-Susitna Borough | Borough |
| Alaska | State |
| USA | Country |
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Latitude & Longitude (WGS84):
62° 37' 11'' North , 152° 46' 11'' West
Latitude & Longitude (decimal):
Köppen climate type:
Mindat Locality ID:
202685
Long-form identifier:
mindat:1:2:202685:8
GUID (UUID V4):
3a717fde-c067-4360-a516-6204a0c3d694
Location: Reed and others (1978, locality 13) locate this occurrence in the headwaters of Pingston Creek.
Geology: This site is given as an unconfirmed location of gold-bearing mariposite-rich boulders by Reed and others (1978). This area drains Paleozoic sedimentary rocks south of the Denali Fault (Reed and Nelson, 1980).
Workings: Reconnaissance mapping and rock sampling by the U.S. Geological Survey (Reed and others, 1978) are all that have been described here. This site is an unconfirmed location of gold-bearing mariposite-rich boulders by Reed and others (1978).
Age: Paleozoic (?); boulders were likely derived from the Paleozoic rocks mapped by Reed and Nelson (1980) upstream from this site.
Commodities (Major) - Au
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
1 valid mineral.
Detailed Mineral List:
| ⓘ Muscovite Formula: KAl2(AlSi3O10)(OH)2 |
| ⓘ Muscovite var. Mariposite Formula: K(Al,Cr)2(Al,Si)4O10(OH)2 |
| ⓘ Muscovite var. Phengite Formula: KAl1.5(Mg,Fe)0.5(Al0.5Si3.5O10)(OH)2 |
Gallery:
List of minerals arranged by Strunz 10th Edition classification
| Group 9 - Silicates | |||
|---|---|---|---|
| ⓘ | Muscovite | 9.EC.15 | KAl2(AlSi3O10)(OH)2 |
| ⓘ | var. Phengite | 9.EC.15 | KAl1.5(Mg,Fe)0.5(Al0.5Si3.5O10)(OH)2 |
| ⓘ | var. Mariposite | 9.EC.15 | K(Al,Cr)2(Al,Si)4O10(OH)2 |
List of minerals for each chemical element
| H | Hydrogen | |
|---|---|---|
| H | ⓘ Muscovite | KAl2(AlSi3O10)(OH)2 |
| H | ⓘ Muscovite var. Phengite | KAl1.5(Mg,Fe)0.5(Al0.5Si3.5O10)(OH)2 |
| H | ⓘ Muscovite var. Mariposite | K(Al,Cr)2(Al,Si)4O10(OH)2 |
| O | Oxygen | |
| O | ⓘ Muscovite | KAl2(AlSi3O10)(OH)2 |
| O | ⓘ Muscovite var. Phengite | KAl1.5(Mg,Fe)0.5(Al0.5Si3.5O10)(OH)2 |
| O | ⓘ Muscovite var. Mariposite | K(Al,Cr)2(Al,Si)4O10(OH)2 |
| Mg | Magnesium | |
| Mg | ⓘ Muscovite var. Phengite | KAl1.5(Mg,Fe)0.5(Al0.5Si3.5O10)(OH)2 |
| Al | Aluminium | |
| Al | ⓘ Muscovite | KAl2(AlSi3O10)(OH)2 |
| Al | ⓘ Muscovite var. Phengite | KAl1.5(Mg,Fe)0.5(Al0.5Si3.5O10)(OH)2 |
| Al | ⓘ Muscovite var. Mariposite | K(Al,Cr)2(Al,Si)4O10(OH)2 |
| Si | Silicon | |
| Si | ⓘ Muscovite | KAl2(AlSi3O10)(OH)2 |
| Si | ⓘ Muscovite var. Phengite | KAl1.5(Mg,Fe)0.5(Al0.5Si3.5O10)(OH)2 |
| Si | ⓘ Muscovite var. Mariposite | K(Al,Cr)2(Al,Si)4O10(OH)2 |
| K | Potassium | |
| K | ⓘ Muscovite | KAl2(AlSi3O10)(OH)2 |
| K | ⓘ Muscovite var. Phengite | KAl1.5(Mg,Fe)0.5(Al0.5Si3.5O10)(OH)2 |
| K | ⓘ Muscovite var. Mariposite | K(Al,Cr)2(Al,Si)4O10(OH)2 |
| Cr | Chromium | |
| Cr | ⓘ Muscovite var. Mariposite | K(Al,Cr)2(Al,Si)4O10(OH)2 |
| Fe | Iron | |
| Fe | ⓘ Muscovite var. Phengite | KAl1.5(Mg,Fe)0.5(Al0.5Si3.5O10)(OH)2 |
Other Databases
| Link to USGS - Alaska: | TL070 |
|---|
Other Regions, Features and Areas containing this locality
North America PlateTectonic Plate
- Farewell-McGrath DomainDomain
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References
