Cameron; Chicken West; Opal Prospect, Southeast Fairbanks Census Area, Alaska, USAi
| Regional Level Types | |
|---|---|
| Cameron; Chicken West; Opal Prospect | Prospect |
| Southeast Fairbanks Census Area | Census Area |
| Alaska | State |
| USA | Country |
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Latitude & Longitude (WGS84):
64° 4' 19'' North , 141° 59' 49'' West
Latitude & Longitude (decimal):
Type:
Köppen climate type:
Location: The Cameron prospect is about 2 miles west of Chicken. It is at an elevation of about 1,900 feet on the north wall of the Mosquito Fork in the SW1/4 section 36, T. 27 N, R. 17 E., of the Copper River Meridian.
Geology: The rocks in the vicinity of the Cameron prospect consist predominantly of granodiorite, quartz monzodiorite, tonalite, and quartz diorite of the Taylor Mountain batholith (Foster, 1976; Werdon and others, 2001). Sphene from the batholith gives a uranium-lead age of 214 Ma (Aleinikoff and others, 1981); this is interpreted to represent the age of intrusion. The batholith has undergone an early Jurassic heating and deformation event. It is cut by porphyritic hornblende quartz diorite dikes, one of which has a 40Ar/39Ar hornblende plateau age of 197.5 Ma (Layer and others, 2002). Minor Paleozoic phyllite, metatuffs, and greenstone are also present in the area. The batholith and the schists have been offset by high-angle faults, and intruded by Tertiary gabbro (Werdon and others, 2001). Tertiary sandstone, conglomerate, and tuff are locally present, and Quaternary alluvium, colluvium, and terrace deposits are extensive in the Mosquito Fork drainage. The Cameron prospect is a weathered, 6-foot-thick mineralized zone that consists of clayey material and many fragments of vein quartz (Prindle, 1905). Rock sample assays contain 0.36 to 0.58 ounce of gold per ton and 0.10 ounce of silver per ton. The original host rock probably was a quartz diorite or granodiorite. Smith (1968) observed flour gold in a lode deposit about 200 feet above the river, and he probably was referring to this occurrence (Cobb, 1977 [OFR 77-845]).
Age: Triassic or younger.
Alteration: Clay alteration of plutonic host rock.
Commodities (Major) - Ag, Au
Development Status: None
Deposit Model: Gold in quartz along a fault zone; possibly a pluton-hosted lode gold deposit re
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
2 valid minerals.
Detailed Mineral List:
| ⓘ 'Clay minerals' |
| ⓘ 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 4 - Oxides and Hydroxides | |||
| ⓘ | Quartz | 4.DA.05 | SiO2 |
| Unclassified | |||
| ⓘ | 'Clay minerals' | - | |
List of minerals for each chemical element
| O | Oxygen | |
|---|---|---|
| O | ⓘ Quartz | SiO2 |
| Si | Silicon | |
| Si | ⓘ Quartz | SiO2 |
| Au | Gold | |
| Au | ⓘ Native Gold | Au |
Other Databases
| Link to USGS - Alaska: | EA129 |
|---|
Other Regions, Features and Areas containing this locality
North AmericaContinent
North America PlateTectonic Plate
- Yukon-TananaVolcanic Arc
- Yukon-Tanana upper DomainDomain
USA
- Alaska
- Fortymile Mining DistrictMining District
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