Quartz Creek Mine, Chistochina Mining District, Southeast Fairbanks Census Area, Alaska, USAi
| Regional Level Types | |
|---|---|
| Quartz Creek Mine | Mine |
| Chistochina Mining District | Mining District |
| Southeast Fairbanks Census Area | Census Area |
| Alaska | State |
| USA | Country |
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Latitude & Longitude (WGS84):
63° 9' 5'' North , 144° 45' 7'' West
Latitude & Longitude (decimal):
Type:
KΓΆppen climate type:
Mindat Locality ID:
199539
Long-form identifier:
mindat:1:2:199539:1
GUID (UUID V4):
feb1f97b-ea2a-40d0-ac3f-6a82a3473e64
Location: This mine is in the lower part of Quartz Creek, a tributary of the east fork of the upper Chisna River. The mine is at an elevation of about 4,100 feet and is about 0.1 mile southeast of the center of section 30, T. 20 S., R. 16 E., Fairbanks Meridian. The approximate location of the mine was shown by Yeend (1981 [OFR 81-355]). This mine corresponds to locality 25 on figure 6 of Cobb (1979 [OFR 79-238] and locality 11 in table 3 of Nokleberg and others (1991).
Geology: This mine is on Quartz Creek on an alluvial fan at the mouth of the creek, similar to the lower placer deposit at Ruby Creek (Gulch) (MH305). Good 'pay' occurs on false bedrock within the fan and on bedrock at the base of the fan. The gravel is poorly sorted and consists mainly of sand-size angular chips of blue-gray slate and cobbles to 1-foot diameter composed of quartz and igneous and metamorphic rocks probably derived from the 'round wash' conglomerate of Tertiary age (Yeend, 1981 [OFR 81-355]). Heavy minerals, abundant in the concentrates, consist predominantly of magnetite, but include amphibole, garnet, ilmenite, chlorite, epidote, pyrite, and zircon. Two varieties of gold are present: bright yellow, and orange brown. Some gold has adhering quartz; small nuggets are mostly flattened (Yeend, 1981 [OFR 81-355]). The placer deposit exploited at the mine is Holocene in age, formed by reconcentration of gold contained in an older alluvial fan and from bedrock sources. 'Round wash' conglomerate of Tertiary age was probably the ultimate source of most of the gold.
Workings: The property was being mined when visited by Yeend (1981 [OFR 81-355]) in 1979.
Age: Holocene deposit formed by reworking of Tertiary and Pleistocene (?) deposits.
Reserves: Yeend (1981 [OFR 81-355]) estimated that the gold-bearing alluvial fan contained about 600,000 cubic meters of gravel, only part of which would have been of ore grade.
Commodities (Major) - Au; (Minor) - Ag
Development Status: Yes; small
Deposit Model: Placer Au (Cox and Singer, 1986; model 39a).
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
6 valid minerals.
Detailed Mineral List:
| β 'Amphibole Supergroup' Formula: AB2C5((Si,Al,Ti)8O22)(OH,F,Cl,O)2 |
| β 'Chlorite Group' |
| β Epidote Formula: (CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH) |
| β 'Garnet Group' Formula: X3Z2(SiO4)3 |
| β Gold Formula: Au |
| β Ilmenite Formula: Fe2+TiO3 |
| β Magnetite Formula: Fe2+Fe3+2O4 |
| β Pyrite Formula: FeS2 |
| β Zircon Formula: Zr(SiO4) |
Gallery:
List of minerals arranged by Strunz 10th Edition classification
| Group 1 - Elements | |||
|---|---|---|---|
| β | Gold | 1.AA.05 | Au |
| Group 2 - Sulphides and Sulfosalts | |||
| β | Pyrite | 2.EB.05a | FeS2 |
| Group 4 - Oxides and Hydroxides | |||
| β | Magnetite | 4.BB.05 | Fe2+Fe3+2O4 |
| β | Ilmenite | 4.CB.05 | Fe2+TiO3 |
| Group 9 - Silicates | |||
| β | Zircon | 9.AD.30 | Zr(SiO4) |
| β | Epidote | 9.BG.05a | (CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH) |
| Unclassified | |||
| β | 'Amphibole Supergroup' | - | AB2C5((Si,Al,Ti)8O22)(OH,F,Cl,O)2 |
| β | 'Chlorite Group' | - | |
| β | 'Garnet Group' | - | X3Z2(SiO4)3 |
List of minerals for each chemical element
| H | Hydrogen | |
|---|---|---|
| H | β Amphibole Supergroup | AB2C5((Si,Al,Ti)8O22)(OH,F,Cl,O)2 |
| H | β Epidote | (CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH) |
| O | Oxygen | |
| O | β Amphibole Supergroup | AB2C5((Si,Al,Ti)8O22)(OH,F,Cl,O)2 |
| O | β Epidote | (CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH) |
| O | β Ilmenite | Fe2+TiO3 |
| O | β Magnetite | Fe2+Fe23+O4 |
| O | β Zircon | Zr(SiO4) |
| O | β Garnet Group | X3Z2(SiO4)3 |
| F | Fluorine | |
| F | β Amphibole Supergroup | AB2C5((Si,Al,Ti)8O22)(OH,F,Cl,O)2 |
| Al | Aluminium | |
| Al | β Amphibole Supergroup | AB2C5((Si,Al,Ti)8O22)(OH,F,Cl,O)2 |
| Al | β Epidote | (CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH) |
| Si | Silicon | |
| Si | β Amphibole Supergroup | AB2C5((Si,Al,Ti)8O22)(OH,F,Cl,O)2 |
| Si | β Epidote | (CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH) |
| Si | β Zircon | Zr(SiO4) |
| Si | β Garnet Group | X3Z2(SiO4)3 |
| S | Sulfur | |
| S | β Pyrite | FeS2 |
| Cl | Chlorine | |
| Cl | β Amphibole Supergroup | AB2C5((Si,Al,Ti)8O22)(OH,F,Cl,O)2 |
| Ca | Calcium | |
| Ca | β Epidote | (CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH) |
| Ti | Titanium | |
| Ti | β Amphibole Supergroup | AB2C5((Si,Al,Ti)8O22)(OH,F,Cl,O)2 |
| Ti | β Ilmenite | Fe2+TiO3 |
| Fe | Iron | |
| Fe | β Epidote | (CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH) |
| Fe | β Ilmenite | Fe2+TiO3 |
| Fe | β Magnetite | Fe2+Fe23+O4 |
| Fe | β Pyrite | FeS2 |
| Zr | Zirconium | |
| Zr | β Zircon | Zr(SiO4) |
| Au | Gold | |
| Au | β Gold | Au |
Other Databases
| Link to USGS - Alaska: | MH306 |
|---|
Other Regions, Features and Areas containing this locality
North America PlateTectonic Plate
- Wrangellia DomainDomain
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References
