Ettrain Creek Prospect, Black Mining District, Southeast Fairbanks Census Area, Alaska, USAi
| Regional Level Types | |
|---|---|
| Ettrain Creek Prospect | Prospect |
| Black Mining District | Mining District |
| Southeast Fairbanks Census Area | Census Area |
| Alaska | State |
| USA | Country |
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Latitude & Longitude (WGS84):
65° 27' 36'' North , 141° 7' 48'' West
Latitude & Longitude (decimal):
Type:
Köppen climate type:
This property lies on Doyon, Limited selected or conveyed land. For more information, contact Doyon, Limited.
Location: The center of the Ettrain Creek prospect is located in section 3, T. 7 N., R. 32 E., of the Fairbanks Meridian; it is near pingos marked on the 1956 U.S. Geological Survey Charley River B-1 topographic map. The prospect covers about 4 square miles. The location is accurate within 1 mile. This prospect is located within Doyon Limited selected or conveyed land.
Geology: The geology at the Ettrain Creek prospect consists of north-dipping Cambrian through Devonian sedimentary rocks, which include the Jones Ridge, Ogilvie, and Nation River Formations, and the McCann Hill Chert (Miyaoka, 1990). The sequence is exposed within a fenster surrounded by the Jones Ridge Formation (DiMarchi and others, 1993). Nearby northwest-trending thrust faults may be a source of mineralization (Dover and Miyaoka, 1988). Silicification is present as quartz stockwork veining in limestone, and as pervasive chalcedonic quartz replacements in limestone breccias. The silicified breccias locally contain small amounts of iron-oxide gossan. Quartz veins show multiple cross-cutting relationships. Local occurrences of iron-oxide gossan containing black pseudomorphs of cubic and hexagonal minerals were also reported. Rock and soil samples show widespread zinc anomalies and lesser anomalies of other metals (lead, arsenic, copper, antimony, tungsten, and cadmium) (DiMarchi and others, 1993). The Ettrain Creek prospect has been explored by soil and surface sampling since the mid-1970s.
Workings: The Ettrain Creek prospect has been soil- and rock-sampled several times since the mid-1970s. In 1993, ASA Inc. conducted a soil and rock sampling program and did some geologic mapping at the prospect. This property lies on Doyon, Limited selected or conveyed land.
Alteration: Quartz stockwork veining in limestone and pervasive chalcedonic quartz replacements in limestone breccias are found throughout the prospect. Locally, small amounts of iron-oxide gossan are found in quartz veins, and some black oxides with cubic and hexagonal shapes are found in the gossan (DiMarchi and others, 1993).
Commodities (Major) - Zn; (Minor) - As, Cd, Cu, Pb, Sb, W
Development Status: None
Deposit Model: Carbonate-hosted Zn-Cu? (Cox and Singer, 1986; model 32b).
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.
Gallery:
List of minerals arranged by Strunz 10th Edition classification
| Group 4 - Oxides and Hydroxides | |||
|---|---|---|---|
| ⓘ | Quartz | 4.DA.05 | SiO2 |
Other Databases
| Link to USGS - Alaska: | CY013 |
|---|
Other Regions, Features and Areas containing this locality
North AmericaContinent
North America PlateTectonic Plate
- Brooks-Northslope1 DomainDomain
- Cordillera Front and ThrustOrogenic Belt
- Eagle basinBasin
- Laurentia triangle DomainDomain
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