Goodwin Gulch Mine, Port Clarence Mining District, Nome Census Area, Alaska, USAi
Regional Level Types | |
---|---|
Goodwin Gulch Mine | Mine |
Port Clarence Mining District | Mining District |
Nome Census Area | Census Area |
Alaska | State |
USA | Country |
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Latitude & Longitude (WGS84):
65° 35' 20'' North , 167° 54' 46'' West
Latitude & Longitude (decimal):
Type:
Köppen climate type:
Nearest Settlements:
Place | Population | Distance |
---|---|---|
Wales | 149 (2018) | 8.3km |
Mindat Locality ID:
197759
Long-form identifier:
mindat:1:2:197759:5
GUID (UUID V4):
011f2372-0c11-44ea-82f1-bc52686026a3
Location: Goodwin Gulch is an easterly-trending, 1.5 mile-long tributary to upper Goodwin Creek that drains the northeast side of Cape Mountain (Cape Mountain is the upland that forms Cape Prince of Wales adjacent to Bering Strait). This is locality 24 of Cobb and Sainsbury (1972). Cobb (1975) summariized relevant references under the name 'Goodwin Gulch'.
Geology: The headwaters of Goodwin Gulch are in the contact zone of the Late Cretaceous Cape Mountain biotite granite (Hudson and Arth, 1983) with Mississippian marble (Sainsbury, 1972). The active drainage of Goodwin Gulch contained an alluvial placer deposit of cassiterite. Early mining was by hand and sluice boxes suggesting that overburden was minimal for at least part of the deposit. Later mining apparently used hydraulic methods and some pay was transported to lower parts of Goodwin Creek or the Bering Sea coast for processing because of lack of water. Average tin grades were esitmated by Mulligan (1966, p. 19) to be about 2.5 pounds of tin per cubic yard. The deposit has apparently been mined out although abundant and coarse cassiterite has been traced from the area of previous mining upslope to lode sources above the south headwater fork (Mulligan, 1966, p. 23).
Workings: Hand, hydraulic, and power shovel operations have been conducted along the lower 4,500 feet of the active drainage. Premining exploration data have not been recorded. Mulligan (1966) traced detrital cassiterite from areas of previous mining to upstream/upslope lode sources. A proposed churn-drilling program to explore for a deeper channel along the south side of the drainage was not carried out at the time (Mulligan, 1966, p. 67-68).
Age: Quaternary
Production: Between 132 and 656 short tons of tin; primarily during the period 1924 to 1940 (Mulligan, 1966, p. 8).
Reserves: The lower 4,500 feet of the 1.25 mile-long active drainage of Goodwin Gulch has been mined; the volume of material remaining upstream is small.
Commodities (Major) - Sn
Development Status: Yes
Deposit Model: Alluvial tin placer (Cox and Singer, 1986; model 39e)
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:
ⓘ Cassiterite Formula: SnO2 |
Gallery:
List of minerals arranged by Strunz 10th Edition classification
Group 4 - Oxides and Hydroxides | |||
---|---|---|---|
ⓘ | Cassiterite | 4.DB.05 | SnO2 |
List of minerals for each chemical element
O | Oxygen | |
---|---|---|
O | ⓘ Cassiterite | SnO2 |
Sn | Tin | |
Sn | ⓘ Cassiterite | SnO2 |
Other Databases
Link to USGS - Alaska: | TE004 |
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Other Regions, Features and Areas containing this locality
North America PlateTectonic Plate
- Brooks-Seward DomainDomain
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