Silver Lining Prospect, Southeast Fairbanks Census Area, Alaska, USAi
| Regional Level Types | |
|---|---|
| Silver Lining Prospect | Prospect |
| Southeast Fairbanks Census Area | Census Area |
| Alaska | State |
| USA | Country |
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Latitude & Longitude (WGS84):
63° 38' 24'' North , 142° 17' 23'' West
Latitude & Longitude (decimal):
Type:
Köppen climate type:
Location: The Silver Lining prospect is located approximately 42 road miles northeast of Tok in the north-central Tanacross (C-3) quadrangle. The prospect is located at the 30-mile marker of the Taylor Highway, at an elevation of 3000 to 3500 feet on the southwest flank of Mt. Fairplay, within T. 22 N., R. 16 E., of the Copper River Meridian (Curt Freeman, unpublished data, 1992). The location is accurate to within 1 to 2 miles.
Geology: The Silver Lining prospect is the Mt. Fairplay biotite syenite which is flanked to the west by Tertiary mafic volcanic rocks and to the east by biotite-quartz gneiss and schist (Foster, 1970). The Mt. Fairplay syenite has a K/Ar date of 67 +/- 2 Ma (Wilson and others, 1985). The prospect is notable for north-northeast linear structures. The mineralization consists of gold, silver, copper, arsenic, lead, zinc, and antimony mineralization hosted by quartz-clay altered shear zones in the biotite syenite. Minerals found include arsenopyrite, chalcopyrite, and galena. The mineralization is controlled by northeast-trending structures that cross-cut a strong northwest joint fabric. Rock samples contain up to 0.255 ounces per ton gold, 62 ounces per ton silver, 6.4 percent copper, and 4.7 percent lead (Curt Freeman, unpublished data, 1992). The regional geology consists of Upper Proterozoic to Lower Paleozoic polymetamorphic rocks ranging from biotite-quartz gneiss to quartz-muscovite-garnet schist (Foster, 1970). This basement assemblage is intruded by numerous intermediate Mesozoic to Tertiary intrusions and is capped by Tertiary mafic and felsic volcanic rocks (Foster, 1970).
Workings: Minor surface rock sampling.
Age: Tertiary or younger.
Alteration: Host syenite is altered to clay and cut by quartz-clay fractures.
Commodities (Major) - Ag, Au, Cu, Pb; (Minor) - As, 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
10 valid minerals.
Detailed Mineral List:
| ⓘ Arsenopyrite Formula: FeAsS |
| ⓘ Azurite Formula: Cu3(CO3)2(OH)2 |
| ⓘ Chalcophanite Formula: ZnMn4+3O7 · 3H2O |
| ⓘ Chalcopyrite Formula: CuFeS2 |
| ⓘ Chrysocolla Formula: Cu2-xAlx(H2-xSi2O5)(OH)4 · nH2O, x < 1 |
| ⓘ 'Clay minerals' |
| ⓘ Galena Formula: PbS |
| ⓘ 'Limonite' |
| ⓘ Malachite Formula: Cu2(CO3)(OH)2 |
| ⓘ Quartz Formula: SiO2 |
| ⓘ Scorodite Formula: Fe3+AsO4 · 2H2O |
| ⓘ Stibiconite Formula: Sb3+Sb5+2O6(OH) |
Gallery:
List of minerals arranged by Strunz 10th Edition classification
| Group 2 - Sulphides and Sulfosalts | |||
|---|---|---|---|
| ⓘ | Chalcopyrite | 2.CB.10a | CuFeS2 |
| ⓘ | Galena | 2.CD.10 | PbS |
| ⓘ | Arsenopyrite | 2.EB.20 | FeAsS |
| Group 4 - Oxides and Hydroxides | |||
| ⓘ | Quartz | 4.DA.05 | SiO2 |
| ⓘ | Stibiconite | 4.DH.20 | Sb3+Sb5+2O6(OH) |
| ⓘ | Chalcophanite | 4.FL.20 | ZnMn4+3O7 · 3H2O |
| Group 5 - Nitrates and Carbonates | |||
| ⓘ | Azurite | 5.BA.05 | Cu3(CO3)2(OH)2 |
| ⓘ | Malachite | 5.BA.10 | Cu2(CO3)(OH)2 |
| Group 8 - Phosphates, Arsenates and Vanadates | |||
| ⓘ | Scorodite | 8.CD.10 | Fe3+AsO4 · 2H2O |
| Group 9 - Silicates | |||
| ⓘ | Chrysocolla | 9.ED.20 | Cu2-xAlx(H2-xSi2O5)(OH)4 · nH2O, x < 1 |
| Unclassified | |||
| ⓘ | 'Clay minerals' | - | |
| ⓘ | 'Limonite' | - | |
List of minerals for each chemical element
| H | Hydrogen | |
|---|---|---|
| H | ⓘ Azurite | Cu3(CO3)2(OH)2 |
| H | ⓘ Chalcophanite | ZnMn34+O7 · 3H2O |
| H | ⓘ Chrysocolla | Cu2-xAlx(H2-xSi2O5)(OH)4 · nH2O, x < 1 |
| H | ⓘ Malachite | Cu2(CO3)(OH)2 |
| H | ⓘ Scorodite | Fe3+AsO4 · 2H2O |
| H | ⓘ Stibiconite | Sb3+Sb25+O6(OH) |
| C | Carbon | |
| C | ⓘ Azurite | Cu3(CO3)2(OH)2 |
| C | ⓘ Malachite | Cu2(CO3)(OH)2 |
| O | Oxygen | |
| O | ⓘ Azurite | Cu3(CO3)2(OH)2 |
| O | ⓘ Chalcophanite | ZnMn34+O7 · 3H2O |
| O | ⓘ Chrysocolla | Cu2-xAlx(H2-xSi2O5)(OH)4 · nH2O, x < 1 |
| O | ⓘ Malachite | Cu2(CO3)(OH)2 |
| O | ⓘ Quartz | SiO2 |
| O | ⓘ Scorodite | Fe3+AsO4 · 2H2O |
| O | ⓘ Stibiconite | Sb3+Sb25+O6(OH) |
| Al | Aluminium | |
| Al | ⓘ Chrysocolla | Cu2-xAlx(H2-xSi2O5)(OH)4 · nH2O, x < 1 |
| Si | Silicon | |
| Si | ⓘ Chrysocolla | Cu2-xAlx(H2-xSi2O5)(OH)4 · nH2O, x < 1 |
| Si | ⓘ Quartz | SiO2 |
| S | Sulfur | |
| S | ⓘ Arsenopyrite | FeAsS |
| S | ⓘ Chalcopyrite | CuFeS2 |
| S | ⓘ Galena | PbS |
| Mn | Manganese | |
| Mn | ⓘ Chalcophanite | ZnMn34+O7 · 3H2O |
| Fe | Iron | |
| Fe | ⓘ Arsenopyrite | FeAsS |
| Fe | ⓘ Chalcopyrite | CuFeS2 |
| Fe | ⓘ Scorodite | Fe3+AsO4 · 2H2O |
| Cu | Copper | |
| Cu | ⓘ Azurite | Cu3(CO3)2(OH)2 |
| Cu | ⓘ Chalcopyrite | CuFeS2 |
| Cu | ⓘ Chrysocolla | Cu2-xAlx(H2-xSi2O5)(OH)4 · nH2O, x < 1 |
| Cu | ⓘ Malachite | Cu2(CO3)(OH)2 |
| Zn | Zinc | |
| Zn | ⓘ Chalcophanite | ZnMn34+O7 · 3H2O |
| As | Arsenic | |
| As | ⓘ Arsenopyrite | FeAsS |
| As | ⓘ Scorodite | Fe3+AsO4 · 2H2O |
| Sb | Antimony | |
| Sb | ⓘ Stibiconite | Sb3+Sb25+O6(OH) |
| Pb | Lead | |
| Pb | ⓘ Galena | PbS |
Other Databases
| Link to USGS - Alaska: | TC026 |
|---|
Other Regions, Features and Areas containing this locality
North AmericaContinent
North America PlateTectonic Plate
- North America PlatformPassive Margin
- Yukon-Tanana lower DomainDomain
USA
- Alaska
- Fortymile Mining DistrictMining District
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