Unnamed Occurrence (ARDF - MG075; near Jones River), Yukon-Koyukuk Census Area, Alaska, USAi
| Regional Level Types | |
|---|---|
| Unnamed Occurrence (ARDF - MG075; near Jones River) | - not defined - |
| Yukon-Koyukuk Census Area | Census Area |
| Alaska | State |
| USA | Country |
This page is currently not sponsored. Click here to sponsor this page.
Latitude & Longitude (WGS84):
62° 26' 45'' North , 153° 14' 27'' West
Latitude & Longitude (decimal):
Köppen climate type:
Location: This unnamed occurrence is located on a northwest facing spur overlooking an unnamed tributary of Jones River; it is at an elevation of 4,900 feet (1,494 m) in the NW1/4 sec. 7, T. 27 N., R. 21 W., of the Seward Meridian. The reporter visited the site in 1984; at station no. 84BT113.
Geology: This unnamed occurrence is a thick, sulfide-bearing, quartz-vein breccia hosted in the mid Silurian Terra Cotta Mountains Sandstone, a unit of the Dillinger subterrane (Bundtzen, Harris, and Gilbert, 1997). The sulfide vein breccia zone averages about 45 meters wide, with individual veins and breccia zones subparallel to bedding in host sandstone and silty limestone. The zone strikes across a saddle in a northeasterly direction; it disappears into talus on both ends. Veins include an older anhedral variety of quartz that has been cut by younger euhedral quartz veins that introduced both chalcopyrite and pyrite. Breccia fragments of sedimentary country rock comprise about 15 percent of the vein material. Total sulfide content is estimated at about 1 percent of the total mineralized zone. No assay data is available. Metallic content is based on recognition of chalcopyrite and pyrite in the field.
Workings: The reporter investigated the site during geologic mapping for the Alaska Division of Geological and Geophysical Surveys in 1984. No assay data is available from the mineralized zone. Metallic content is based on recognition of chalcopyrite and pyrite in the field.
Reserves: None.
Commodities (Major) - Cu; (Minor) - Fe
Development Status: No
Deposit Model: Polymetallic vein (Cox and Singer, 1986; model 22c).
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 | |||
|---|---|---|---|
| ⓘ | Chalcopyrite | 2.CB.10a | CuFeS2 |
| ⓘ | Pyrite | 2.EB.05a | FeS2 |
| 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 | ⓘ Chalcopyrite | CuFeS2 |
| S | ⓘ Pyrite | FeS2 |
| Fe | Iron | |
| Fe | ⓘ Chalcopyrite | CuFeS2 |
| Fe | ⓘ Pyrite | FeS2 |
| Cu | Copper | |
| Cu | ⓘ Chalcopyrite | CuFeS2 |
Other Databases
| Link to USGS - Alaska: | MG075 |
|---|
Other Regions, Features and Areas containing this locality
North AmericaContinent
North America PlateTectonic Plate
- Farewell-McGrath DomainDomain
- Farewell TerranePassive Margin
USA
- Alaska
- Yukon-Koyukuk Census Area
- McGrath Mining DistrictMining District
- Yukon-Koyukuk Census Area
This page contains all mineral locality references listed on mindat.org. This does not claim to be a complete list. If you know of more minerals from this site, please register so you can add to our database. This locality information is for reference purposes only. You should never attempt to
visit any sites listed in mindat.org without first ensuring that you have the permission of the land and/or mineral rights holders
for access and that you are aware of all safety precautions necessary.
