Veta Prospect, Mallard Bay, Prince of Wales Island, Ketchikan Mining District, Prince of Wales-Hyder Census Area, Alaska, USAi
| Regional Level Types | |
|---|---|
| Veta Prospect | Prospect |
| Mallard Bay | Bay |
| Prince of Wales Island | Island |
| Ketchikan Mining District | Mining District |
| Prince of Wales-Hyder Census Area | Census Area |
| Alaska | State |
| USA | Country |
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Latitude & Longitude (WGS84):
54° 47' 5'' North , 132° 1' 26'' West
Latitude & Longitude (decimal):
Type:
KΓΆppen climate type:
Nearest Settlements:
| Place | Population | Distance |
|---|---|---|
| Metlakatla | 1,405 (2017) | 47.7km |
Mindat Locality ID:
202777
Long-form identifier:
mindat:1:2:202777:0
GUID (UUID V4):
3dee80c3-6c76-469c-8afd-846d915daecc
Location: The Veta prospect is about 0.2 mile northwest of the head of Mallard Bay, and about 0.2 mile south of the center of section 6, T. 82 S, R. 90 E. (The Veta prospect is often included with the Polson and Ickis prospects (DE039) in early reports).
Geology: The rocks in the area are Silurian or Ordovician quartz monzonite, syenite, and quartz diorite that are part of a batholith that makes up the southeastern tip of Prince of Wales Island (Gehrels, 1992). There are several prominent northwest-trending faults near the prospect. The workings consist of two flooded vertical shafts, one 30 feet deep and the other 78 feet deep, and about 78 feet of drifts and crosscuts (Knopf, 1910; MacKevett, 1963; Maas and others, 1991). The working are in fine-grained diorite along a fault zone about 3 feet wide that strikes N50W and dips 80NE. The fault zone and its wallrocks are pervasively altered to secondary iron minerals and clay. Quartz veins in the fault contain pyrite and chalcopyrite, along with less-abundant bornite, malachite(?), chrysocolla, and hematite. The sulfides are also disseminated through the wall rocks. Maas and others (1991) collected several samples from rubble crop and dumps that contained 1,833 parts per million (ppm) to 6.41 percent copper, 5.6 to 25.7 ppm silver, and 94 to 7,258 parts per billion gold.
Workings: The workings consist of two flooded vertical shafts, one 30 feet deep and the other 78 feet deep, and about 78 feet of drifts and crosscuts.
Age: The vein cuts Silurian or Ordovician granitic rocks.
Alteration: Pervasive alteration of the fault zone and granitic wall rocks to secondary iron oxides and clay minerals.
Commodities (Major) - Ag, Au, Cu
Development Status: None
Deposit Model: Quartz vein with copper, gold, and silver values. (Cox and Singer, 1986; model
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
7 valid minerals.
Detailed Mineral List:
| β Bornite Formula: Cu5FeS4 |
| β Chalcopyrite Formula: CuFeS2 |
| β Chrysocolla Formula: Cu2-xAlx(H2-xSi2O5)(OH)4 · nH2O, x < 1 |
| β Hematite Formula: Fe2O3 |
| β Malachite Formula: Cu2(CO3)(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 | Bornite | 2.BA.15 | Cu5FeS4 |
| β | Chalcopyrite | 2.CB.10a | CuFeS2 |
| β | Pyrite | 2.EB.05a | FeS2 |
| Group 4 - Oxides and Hydroxides | |||
| β | Hematite | 4.CB.05 | Fe2O3 |
| β | Quartz | 4.DA.05 | SiO2 |
| Group 5 - Nitrates and Carbonates | |||
| β | Malachite | 5.BA.10 | Cu2(CO3)(OH)2 |
| Group 9 - Silicates | |||
| β | Chrysocolla | 9.ED.20 | Cu2-xAlx(H2-xSi2O5)(OH)4 Β· nH2O, x < 1 |
List of minerals for each chemical element
| H | Hydrogen | |
|---|---|---|
| H | β Chrysocolla | Cu2-xAlx(H2-xSi2O5)(OH)4 · nH2O, x < 1 |
| H | β Malachite | Cu2(CO3)(OH)2 |
| C | Carbon | |
| C | β Malachite | Cu2(CO3)(OH)2 |
| O | Oxygen | |
| O | β Chrysocolla | Cu2-xAlx(H2-xSi2O5)(OH)4 · nH2O, x < 1 |
| O | β Hematite | Fe2O3 |
| O | β Malachite | Cu2(CO3)(OH)2 |
| O | β Quartz | SiO2 |
| Al | Aluminium | |
| Al | β Chrysocolla | Cu2-xAlx(H2-xSi2O5)(OH)4 · nH2O, x < 1 |
| Si | Silicon | |
| Si | β Chrysocolla | Cu2-xAlx(H2-xSi2O5)(OH)4 · nH2O, x < 1 |
| Si | β Quartz | SiO2 |
| S | Sulfur | |
| S | β Bornite | Cu5FeS4 |
| S | β Chalcopyrite | CuFeS2 |
| S | β Pyrite | FeS2 |
| Fe | Iron | |
| Fe | β Bornite | Cu5FeS4 |
| Fe | β Chalcopyrite | CuFeS2 |
| Fe | β Hematite | Fe2O3 |
| Fe | β Pyrite | FeS2 |
| Cu | Copper | |
| Cu | β Bornite | Cu5FeS4 |
| Cu | β Chalcopyrite | CuFeS2 |
| Cu | β Chrysocolla | Cu2-xAlx(H2-xSi2O5)(OH)4 · nH2O, x < 1 |
| Cu | β Malachite | Cu2(CO3)(OH)2 |
Other Databases
| Link to USGS - Alaska: | DE040 |
|---|
Other Regions, Features and Areas containing this locality
North America PlateTectonic Plate
- Alexander DomainDomain
- Queen Charlotte basinBasin
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References
