Chisna Prospect, Chistochina Mining District, Southeast Fairbanks Census Area, Alaska, USAi
| Regional Level Types | |
|---|---|
| Chisna Prospect | Prospect |
| Chistochina Mining District | Mining District |
| Southeast Fairbanks Census Area | Census Area |
| Alaska | State |
| USA | Country |
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Latitude & Longitude (WGS84):
63° 8' 59'' North , 144° 47' 56'' West
Latitude & Longitude (decimal):
Type:
Köppen climate type:
Location: This prospect consists of a block of 180 State of Alaska claims that were staked in 2006 south of upper Slate Creek. near Chisna Pass. Most of the exploration was in the west half of section 25, T. 16 N., R. 14 E. and the coordinates are at about the center of that work. However, samples were also collected about 1.5 miles to the northwest and some about 2 miles to the southeast.
Geology: International Tower Hill Mines, Ltd. staked a block of 180 claims south of Chisna Pass in 2006 and did some limited sampling as an initial step in determine the potential of what they considered a favorable area for mineralization (International Tower Hill Mines, 2008). Further work in 2007 delineated anomalous nickel in the Miller Gulch Gabbro and gold-copper mineralization in the Powell Creek Diorite where a strongly silicified zone over a half-kilometer long was identified. Thirty-nine samples from this silicified zone--the POW discovery-- averaged 1.1 gram of gold per ton, 7.9 grams of silver per tonne, and 0.3 percent copper. The rocks in the area mainly are part of the Pennsylvanian to Permian Mankomen Formation which here consists of basalt to dacite flows, breccia, agglomerate and tuff, and minor interbedded siltstone and stone, with rhyolite quartz porphyry in flows, sills, and dikes. These rocks are intruded by several large intrusions of gabbro and diorite.
Workings: International Tower Hill Mines, Ltd. staked a block of 180 claims south of Chisna Pass in 2006 and did some limited sampling as an initial step to determine the potential of what they consider a favorable area for mineralization (International Tower Hill Mines, 2008, Chisna). Further work in 2007 included an airborne geophysical survey and additional surface sampling that identified several zones of mineralization.
Alteration: Strong silica-pyrite alteration zones.
Reserves: None.
Commodities (Major) - Au, Cu; (Minor) - Ni
Development Status: None
Deposit Model: Gold and copper in altered zones volcanics rocks.
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.
Detailed Mineral List:
| ⓘ Chalcopyrite Formula: CuFeS2 |
| ⓘ Native Gold Formula: Au |
| ⓘ Quartz Formula: SiO2 |
Gallery:
List of minerals arranged by Strunz 10th Edition classification
| Group 1 - Elements | |||
|---|---|---|---|
| ⓘ | Native Gold | 1.AA.05 | Au |
| Group 2 - Sulphides and Sulfosalts | |||
| ⓘ | Chalcopyrite | 2.CB.10a | CuFeS2 |
| 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 |
| Fe | Iron | |
| Fe | ⓘ Chalcopyrite | CuFeS2 |
| Cu | Copper | |
| Cu | ⓘ Chalcopyrite | CuFeS2 |
| Au | Gold | |
| Au | ⓘ Native Gold | Au |
Other Databases
| Link to USGS - Alaska: | MH365 |
|---|
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