Mansfield; Seattle Prospect, Admiralty Mining District, Hoonah-Angoon Census Area, Alaska, USAi
| Regional Level Types | |
|---|---|
| Mansfield; Seattle Prospect | Prospect |
| Admiralty Mining District | Mining District |
| Hoonah-Angoon Census Area | Census Area |
| Alaska | State |
| USA | Country |
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Latitude & Longitude (WGS84):
58° 15' 46'' North , 134° 51' 25'' West
Latitude & Longitude (decimal):
Type:
Köppen climate type:
Nearest Settlements:
| Place | Population | Distance |
|---|---|---|
| Juneau | 32,756 (2017) | 25.9km |
| Tenakee Springs | 133 (2017) | 57.6km |
Location: This prospect is at an elevation of about 500 feet, approximately 1.5 miles east-northeast of Funter, and 0.5 mile southeast of Bear Creek at the head of Funter Bay. It is near the northwest corner of section 6, T. 42 S., R. 65 E. of the Copper River Meridian. The location is accurate within 1/4 mile.
Geology: This prospect was discovered before 1908; it consists of several conformable quartz veins in schist. The veins are 3 feet to 6 feet thick, 100 feet apart, and strike northwest. They contain disseminated chalcopyrite, pyrrhotite, and minor galena and sphalerite (Wells and others, 1986). The prospect is developed by surface trenches, a tunnel, and a crosscut. (Cobb, 1978 [OFR 78-374]). No other information is available. 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).
Workings: The prospect is developed by surface trenches, a 20-foot tunnel, and a crosscut.
Commodities (Major) - Au, Cu, Pb, Zn
Development Status: No
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
5 valid minerals.
Detailed Mineral List:
| ⓘ Chalcopyrite Formula: CuFeS2 |
| ⓘ Galena Formula: PbS |
| ⓘ Pyrrhotite Formula: Fe1-xS |
| ⓘ Quartz Formula: SiO2 |
| ⓘ Sphalerite Formula: ZnS |
Gallery:
List of minerals arranged by Strunz 10th Edition classification
| Group 2 - Sulphides and Sulfosalts | |||
|---|---|---|---|
| ⓘ | Sphalerite | 2.CB.05a | ZnS |
| ⓘ | Chalcopyrite | 2.CB.10a | CuFeS2 |
| ⓘ | Pyrrhotite | 2.CC.10 | Fe1-xS |
| ⓘ | Galena | 2.CD.10 | PbS |
| Group 4 - Oxides and Hydroxides | |||
| ⓘ | Quartz | 4.DA.05 | SiO2 |
List of minerals for each chemical element
| O | Oxygen | |
|---|---|---|
| O | ⓘ Quartz | SiO2 |
| Si | Silicon | |
| Si | ⓘ Quartz | SiO2 |
| S | Sulfur | |
| S | ⓘ Chalcopyrite | CuFeS2 |
| S | ⓘ Galena | PbS |
| S | ⓘ Pyrrhotite | Fe1-xS |
| S | ⓘ Sphalerite | ZnS |
| Fe | Iron | |
| Fe | ⓘ Chalcopyrite | CuFeS2 |
| Fe | ⓘ Pyrrhotite | Fe1-xS |
| Cu | Copper | |
| Cu | ⓘ Chalcopyrite | CuFeS2 |
| Zn | Zinc | |
| Zn | ⓘ Sphalerite | ZnS |
| Pb | Lead | |
| Pb | ⓘ Galena | PbS |
Other Databases
| Link to USGS - Alaska: | JU217 |
|---|
Other Regions, Features and Areas containing this locality
North AmericaContinent
North America PlateTectonic Plate
- Alexander DomainDomain
- Alexander TerraneVolcanic Arc
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