Taylor Creek prospect, Kupreanof Island, Petersburg Borough, Alaska, USAi
| Regional Level Types | |
|---|---|
| Taylor Creek prospect | Prospect |
| Kupreanof Island | Island |
| Petersburg Borough | Borough |
| Alaska | State |
| USA | Country |
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Latitude & Longitude (WGS84):
56° 47' 36'' North , 133° 21' 50'' West
Latitude & Longitude (decimal):
Type:
Köppen climate type:
Nearest Settlements:
| Place | Population | Distance |
|---|---|---|
| Petersburg | 2,948 (2017) | 24.9km |
Other/historical names associated with this locality:
ARDF - PE084
Location: This prospect, which was rediscovered in 1997, is south of the middle part of Taylor Creek about 0.6 mile north of hill 1606 and about 1.5 miles upstream from the mouth of Taylor Creek in upper Duncan Canal. It is about 0.4 mile southeast of the center of section 36, T. 59 S., R. 76 E. The location is accurate.
Geology: The Taylor Creek deposit has been known since 1903 or 1904 (Wright and Wright, 1908; Kerns, 1950) and has been examined numerous times by government and industry. There was considerable activity during the 1940's, mainly restricted to surface sampling and some trenching and pitting (Fowler, 1948 [DGGS IR 195-2]; Fowler, 1948 [DGGS IR 117-5]; Roehm, 1946 [DGGS IR 195-41]; and Roehm,1946 [DGGS IR 117-4]). The property has been been intermittently active since. Kerns (1950) reported on extensive diamond drilling carried out by the U. S. Bureau of Mines in 1948 and the 14 trenches they dug on several areas of mineralization. In 1997, Kennecott Exploration Company staked a large block of claims that included the deposit. The deposit consists of Irregular masses and disseminated grains of galena, sphalerite, pyrite, and chalcopyrite in dolomitic limestone (Kerns, 1950). In the best exposures along Taylor Creek, pervasively disseminated pyrite, galena, and sphalerite occur over an area about 3 meters wide by 7 meters long in a brecciated zone. This zone occurs in a thinly laminated to phyllitic, light-gray and white, fine-grained dolomitic marble which overlies green crenulated muscovite-chlorite-calcite schist. The mineralization persists for approximately 100 m along the southwest bank of Taylor Creek. Maximum assay values in drill cores and outcrop samples collected by Kerns (1950) were 4.3 percent zinc, 0.95 percent lead, and 1.2 ounces of silver per ton. Several origins for the deposit has been suggested. Newer work suggests that the deposit is certainly spatially and possibly genetically associated with the Duncan Canal-Zarembo belt of Triassic massive sulfide mineralization defined by Berg and Grybeck (1980), and Berg (1981). Mapping by Karl and others (1999) indicate that the rocks at Taylor Creek are part of the Triassic Hyd Group. This prospect was first staked by Kennecott Exploration Company in 1997 based on geophysical and geophysical anomalies and they drilled five holes in 2000. Still and others (2002) briefly examined the deposit and collected several samples that included a sample across 0.7 feet that contained 25.9 parts per million (ppm) silver, 7.72 percent lead, and 6.9 percent zinc; a select sample that contained more than 500 ppm silver, 7,217 ppm lead, and 2.1 percent zinc; a grab sample of gossan that contained 903 parts per billion (ppb) gold, 160 ppm silver, 9.69 percent lead, and 3.0 percent zinc; a sample across a 3.0-foot layer of semi-massive pyrite contained 197 parts per billion (ppb) gold, 19.2 parts per million (ppm) silver, 335 ppm lead, and 479 ppm zinc; and a sample across a 0.6-foot layer of semi-massive pyrite in slate contained 453 ppm lead and 2,518 ppm zinc. They considered the deposit to be a volcanogenic massive sulfide deposit similar to others in the area.
Workings: The Taylor Creek deposit has been known since 1903 or 1904 (Wright and Wright, 1908; Kerns, 1950) and has been examined numerous times by government and industry. Considerable activity during the 1940's, mainly restricted to surface sampling and some trenching and pitting (Fowler, 1948 [DGGS IR 195-2]; Fowler, 1948 [DGGS IR 117-5]; Roehm, 1946 [DGGS IR 195-41]; and Roehm,1946 [DGGS IR 117-4]). The property has been intermittently active since. Kerns (1950) reported on extensive diamond drilling carried out by the U. S. Bureau of Mines in 1948 and the 14 trenches they dug on several areas of mineralization. In 1997, Kennecott Exploration Co. staked a large block of claims that included the deposit and drilled five exploration holes. Additional sampling by the Bureau of Land Management was conducted in the late 1990's.
Age: Contemporaneous with the Triassic host rock.
Commodities (Major) - Ag, Au, Cu, Pb, Zn
Development Status: No
Deposit Model: Probably a (remobilized?) volcanogenic massive sulfide deposit.
Geology: The Taylor Creek deposit has been known since 1903 or 1904 (Wright and Wright, 1908; Kerns, 1950) and has been examined numerous times by government and industry. There was considerable activity during the 1940's, mainly restricted to surface sampling and some trenching and pitting (Fowler, 1948 [DGGS IR 195-2]; Fowler, 1948 [DGGS IR 117-5]; Roehm, 1946 [DGGS IR 195-41]; and Roehm,1946 [DGGS IR 117-4]). The property has been been intermittently active since. Kerns (1950) reported on extensive diamond drilling carried out by the U. S. Bureau of Mines in 1948 and the 14 trenches they dug on several areas of mineralization. In 1997, Kennecott Exploration Company staked a large block of claims that included the deposit. The deposit consists of Irregular masses and disseminated grains of galena, sphalerite, pyrite, and chalcopyrite in dolomitic limestone (Kerns, 1950). In the best exposures along Taylor Creek, pervasively disseminated pyrite, galena, and sphalerite occur over an area about 3 meters wide by 7 meters long in a brecciated zone. This zone occurs in a thinly laminated to phyllitic, light-gray and white, fine-grained dolomitic marble which overlies green crenulated muscovite-chlorite-calcite schist. The mineralization persists for approximately 100 m along the southwest bank of Taylor Creek. Maximum assay values in drill cores and outcrop samples collected by Kerns (1950) were 4.3 percent zinc, 0.95 percent lead, and 1.2 ounces of silver per ton. Several origins for the deposit has been suggested. Newer work suggests that the deposit is certainly spatially and possibly genetically associated with the Duncan Canal-Zarembo belt of Triassic massive sulfide mineralization defined by Berg and Grybeck (1980), and Berg (1981). Mapping by Karl and others (1999) indicate that the rocks at Taylor Creek are part of the Triassic Hyd Group. This prospect was first staked by Kennecott Exploration Company in 1997 based on geophysical and geophysical anomalies and they drilled five holes in 2000. Still and others (2002) briefly examined the deposit and collected several samples that included a sample across 0.7 feet that contained 25.9 parts per million (ppm) silver, 7.72 percent lead, and 6.9 percent zinc; a select sample that contained more than 500 ppm silver, 7,217 ppm lead, and 2.1 percent zinc; a grab sample of gossan that contained 903 parts per billion (ppb) gold, 160 ppm silver, 9.69 percent lead, and 3.0 percent zinc; a sample across a 3.0-foot layer of semi-massive pyrite contained 197 parts per billion (ppb) gold, 19.2 parts per million (ppm) silver, 335 ppm lead, and 479 ppm zinc; and a sample across a 0.6-foot layer of semi-massive pyrite in slate contained 453 ppm lead and 2,518 ppm zinc. They considered the deposit to be a volcanogenic massive sulfide deposit similar to others in the area.
Workings: The Taylor Creek deposit has been known since 1903 or 1904 (Wright and Wright, 1908; Kerns, 1950) and has been examined numerous times by government and industry. Considerable activity during the 1940's, mainly restricted to surface sampling and some trenching and pitting (Fowler, 1948 [DGGS IR 195-2]; Fowler, 1948 [DGGS IR 117-5]; Roehm, 1946 [DGGS IR 195-41]; and Roehm,1946 [DGGS IR 117-4]). The property has been intermittently active since. Kerns (1950) reported on extensive diamond drilling carried out by the U. S. Bureau of Mines in 1948 and the 14 trenches they dug on several areas of mineralization. In 1997, Kennecott Exploration Co. staked a large block of claims that included the deposit and drilled five exploration holes. Additional sampling by the Bureau of Land Management was conducted in the late 1990's.
Age: Contemporaneous with the Triassic host rock.
Commodities (Major) - Ag, Au, Cu, Pb, Zn
Development Status: No
Deposit Model: Probably a (remobilized?) volcanogenic massive sulfide deposit.
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
6 valid minerals.
Detailed Mineral List:
| ⓘ Calcite Formula: CaCO3 |
| ⓘ Chalcopyrite Formula: CuFeS2 |
| ⓘ Dolomite Formula: CaMg(CO3)2 |
| ⓘ Galena Formula: PbS |
| ⓘ Pyrite Formula: FeS2 |
| ⓘ 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 |
| ⓘ | Galena | 2.CD.10 | PbS |
| ⓘ | Pyrite | 2.EB.05a | FeS2 |
| Group 5 - Nitrates and Carbonates | |||
| ⓘ | Calcite | 5.AB.05 | CaCO3 |
| ⓘ | Dolomite | 5.AB.10 | CaMg(CO3)2 |
List of minerals for each chemical element
| C | Carbon | |
|---|---|---|
| C | ⓘ Calcite | CaCO3 |
| C | ⓘ Dolomite | CaMg(CO3)2 |
| O | Oxygen | |
| O | ⓘ Calcite | CaCO3 |
| O | ⓘ Dolomite | CaMg(CO3)2 |
| Mg | Magnesium | |
| Mg | ⓘ Dolomite | CaMg(CO3)2 |
| S | Sulfur | |
| S | ⓘ Chalcopyrite | CuFeS2 |
| S | ⓘ Galena | PbS |
| S | ⓘ Pyrite | FeS2 |
| S | ⓘ Sphalerite | ZnS |
| Ca | Calcium | |
| Ca | ⓘ Calcite | CaCO3 |
| Ca | ⓘ Dolomite | CaMg(CO3)2 |
| Fe | Iron | |
| Fe | ⓘ Chalcopyrite | CuFeS2 |
| Fe | ⓘ Pyrite | FeS2 |
| Cu | Copper | |
| Cu | ⓘ Chalcopyrite | CuFeS2 |
| Zn | Zinc | |
| Zn | ⓘ Sphalerite | ZnS |
| Pb | Lead | |
| Pb | ⓘ Galena | PbS |
Other Databases
| Link to USGS - Alaska: | PE006 |
|---|
Other Regions, Features and Areas containing this locality
North America PlateTectonic Plate
- Alexander DomainDomain
- Alexander TerraneVolcanic Arc
USA
- Alaska
- Petersburg Borough
- Kupreanof Mining DistrictMining District
- ⭔Wrangell-Petersburg Census AreaBorough
- Petersburg Borough
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References
Fowler, H.M. (1948) Report of investigations in the Petersburg-Ketchikan mining precincts. Alaska Territorial Department of Mines Itinerary Report 195-2. Alaska Territorial Department of Mines 12 pp.
Berg, Henry C., Grybeck, Donald G. (1980) Upper Triassic volcanogenic Zn-Pb-Ag(-Cu-Au) mineral deposits near Petersburg, Alaska. Open-File Report Vol. 1980 (80-527) US Geological Survey doi:10.3133/ofr80527