Eldorado Creek Prospect, Port Clarence Mining District, Nome Census Area, Alaska, USAi
| Regional Level Types | |
|---|---|
| Eldorado Creek Prospect | Prospect |
| Port Clarence Mining District | Mining District |
| Nome Census Area | Census Area |
| Alaska | State |
| USA | Country |
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Latitude & Longitude (WGS84):
65° 56' 6'' North , 166° 6' 39'' West
Latitude & Longitude (decimal):
Type:
Köppen climate type:
Nearest Settlements:
| Place | Population | Distance |
|---|---|---|
| Shishmaref | 580 (2017) | 35.7km |
Mindat Locality ID:
197365
Long-form identifier:
mindat:1:2:197365:8
GUID (UUID V4):
0e3498e8-d655-41e2-aa58-0b0f92321908
Location: Eldorado is a west tributary to upper Kreuger Creek (TE067) with headwaters in the northeast contact zone of the Ear Mountain granite stock (Sainsbury, 1972) including a part of North Hill where significant lode tin and related metallization has been identified (Ear Mountain prospect, TE060). Ear Mountain is an isolated upland reaching 2,329 feet elevation in the north-central Teller D-3 quadrangle. This is locality 60, 61, 62, and 63 of Cobb and Sainsbury (1972). Cobb summarized relevant references under the name 'Eldorado Cr.'.
Geology: Eldorado Creek has headwaters that cross the northeast contact zone of the Ear Mountain granite stock (Sainsbury, 1972). This stock is a Late Cretaceous (76.7 +/- 2.9 my; Hudson and Arth, 1983, p. 769) composite biotite granite that intrudes an impure and schistose carbonate sequence, with some metapelitic rocks, of unknown but probable Paleozoic age. The country rocks are variably converted to tactite and hornfels around the granite stock (Knopf, 1908, p. 28-29). Churn drill holes from Eldorado Creek, including three in its headwater tributaries at about 600 and 750 feet elevation (Mulligan, 1959, p. 20), contain a trace to 0.8 pounds of tin per cubic yard. The total gravel thickness in these holes varied from 1 to 14 feet and the pay thickness was 2 to 11.5 feet. Minerals identified in the headwater tributary holes include quartz, calcite, grossularite garnet, albite, orthoclase, zircon, epidote, hornblende, limonite, crossite, tourmaline, dioside, chlorite, chondrodite, idocrase, magnetite, and cassiterite (in all three tributaries; Mulligan, 1959, p. 29).
Workings: A total of 20 churn-drill holes were completed along three lines located along 2,600 feet of the lower part of the creek and three other churn-drill holes were completed in headwater tributaries (Mulligan, 1959).
Age: Quaternary
Reserves: Not defined
Commodities (Major) - Sn
Development Status: None
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: | TE068 |
|---|
Other Regions, Features and Areas containing this locality
North America PlateTectonic Plate
- Brooks-Seward DomainDomain
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References
