Unnamed Occurrence (ARDF - TL075; in the Yenlo Hills), Yentna Mining District, Matanuska-Susitna Borough, Alaska, USAi
| Regional Level Types | |
|---|---|
| Unnamed Occurrence (ARDF - TL075; in the Yenlo Hills) | - not defined - |
| Yentna Mining District | Mining District |
| Matanuska-Susitna Borough | Borough |
| Alaska | State |
| USA | Country |
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Latitude & Longitude (WGS84):
62° 10' 44'' North , 151° 14' 9'' West
Latitude & Longitude (decimal):
Köppen climate type:
Location: This site is located in a drainage bottom in the southeast quarter of Section 11, T. 24 N., R. 11 W., of the Seward Meridian. It is approximately two and a half miles west of TL071 at the north end of the Yenlo Hills.
Geology: Diamond Gold Corporation reports a discovery of gold-rich arsenopyrite veins that average 0.10 oz/ton gold and 2 oz/ton silver (company press release, 10/14/98). Trenching exposes the one vein in a 400-foot-long zone (width not specified). They indicate the mineralization is related to the 'Hudson Stock', a gabbro body which returned assays of anomalous nickel, chromite and platinum-group-elements (values not released). The ultramafic body, which intrudes Mesozoic marine sedimentary rocks (KJs, Reed and Nelson, 1980), produced extensive hornfels areas with stockwork quartz veinlets (C.C. Hawley, oral communication).
Workings: Trenching, rock chip sampling and mapping by Diamond Gold Corporation were conducted during 1998. They indicate the mineralization is related to the 'Hudson Stock', a gabbro body which returned assays of anomalous nickel, chromite and platinum-group-elements (values not released).
Alteration: Some clay gouge, with pyrite and quartz, is reported in a fault zone in the sedimentary rocks.
Commodities (Major) - Au, Cr, Ni, unidentified platinum-group elem
Development Status: None
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
3 valid minerals.
Gallery:
List of minerals arranged by Strunz 10th Edition classification
| Group 2 - Sulphides and Sulfosalts | |||
|---|---|---|---|
| ⓘ | Pyrite | 2.EB.05a | FeS2 |
| ⓘ | Arsenopyrite | 2.EB.20 | FeAsS |
| Group 4 - Oxides and Hydroxides | |||
| ⓘ | Quartz | 4.DA.05 | SiO2 |
List of minerals for each chemical element
| O | Oxygen | |
|---|---|---|
| O | ⓘ Quartz | SiO2 |
| Si | Silicon | |
| Si | ⓘ Quartz | SiO2 |
| S | Sulfur | |
| S | ⓘ Arsenopyrite | FeAsS |
| S | ⓘ Pyrite | FeS2 |
| Fe | Iron | |
| Fe | ⓘ Arsenopyrite | FeAsS |
| Fe | ⓘ Pyrite | FeS2 |
| As | Arsenic | |
| As | ⓘ Arsenopyrite | FeAsS |
Other Databases
| Link to USGS - Alaska: | TL075 |
|---|
Other Regions, Features and Areas containing this locality
North AmericaContinent
North America PlateTectonic Plate
- Susitna BasinBasin
- Wrangellia DomainVolcanic Arc
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