| Quadrangle map, 1:250,000-scale | BN |
|---|---|
| Quadrangle map, 1:63,360-scale | A-4 |
| Latitude | 65.18 |
| Longitude | -163.87 |
| Nearby scientific data | Find additional scientific data near this location |
| Location and accuracy | This occurrence is on the ridge crest between two unnamed, east headwater tributaries to the Niukluk River, near elevation 2,247 feet. |
Geologic descriptionThis is a possible duftite occurrence along the trend of an apparently conformable pyrrhotite-bearing schist layer that is better expressed about one half mile to the ENE (Briskey, 1983). This locality, and several others in this part of the Bendeleben A-4 quadrangle, are in high grade metamorphic rocks that are structurally above or peripheral to the crosscutting Pargon pluton. The Pargon pluton is mostly granodiorite and assumed to be Cretaceous in age (Till and others, 1986). It was emplaced at shallower depths than the more deep-seated Bendeleben pluton to the east. The metamorphic rocks peripheral to the western Pargon pluton are also intruded by small, felsic dikes and plugs including quartz porphyry and muscovite granite. | |
| Geologic map unit | (-163.872641681442, 65.1792748576421) |
|---|---|
| Mineral deposit model | Duftite? in metamorphic rocks. |
| Age of mineralization | Cretaceous ? |
| Alteration of deposit | Oxidation? |
| Workings or exploration | No workings are known at this locality. |
|---|---|
| Indication of production | None |
| MRDS Number | A012769 |
|---|---|
ReferencesBriskey, J.A., 1983, Summary of field observations on Seward Peninsula mineral deposits: U.S. Geological Survey, unpublished administrative report, 34 p.
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| Reporters | Travis L. Hudson (Applied Geology) |
| Last report date | 3/15/1999 |