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Unnamed Occurrence (ARDF - TN045; Sixmile Creek Headwaters), Rampart Mining District, Yukon-Koyukuk Census Area, Alaska, USAi
| Regional Level Types | |
|---|---|
| Unnamed Occurrence (ARDF - TN045; Sixmile Creek Headwaters) | - not defined - |
| Rampart Mining District | Mining District |
| Yukon-Koyukuk Census Area | Census Area |
| Alaska | State |
| USA | Country |
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Latitude & Longitude (WGS84):
65° 23' 2'' North , 150° 23' 16'' West
Latitude & Longitude (decimal):
Köppen climate type:
Location: This occurrence is at an elevation of about 2,000 feet on a ridge at the head of Sixmile Creek. The site is at Alaska Division of Geological and Geophysical Surveys (ADGGS) sample station 96BT274 (Liss and others, 1997), at the southwest corner of section 35, T. 7 N., R. 14 W., of the Fairbanks Meridian. The location is accurate within 500 feet.
Geology: The headwaters of Sixmile Creek drain an area underlain by Triassic to Mississippian, Rampart Group gabbro sills intercalated with basaltic flows, diabase, and diverse sedimentary rocks (Reifenstuhl and others, 1997 [RI 97-15a]). The rocks locally are penetratively deformed, regionally metamorphosed to low greenschist grade, fractured, sheared, and altered, and display mylonitic fabric. The Rampart Group rocks are both unconformably overlain by, and in high-angle fault contact with, Tertiary basalt and rhyolite. A sample (96BT274) of a 3-inch-thick, malachite-stained, quartz-sulfide vein in slightly chloritized greenstone/diabase at the head of Sixmile Creek contained 33.6 parts per million (ppm) silver, 4,637 ppm copper, 4,107 ppm zinc, 11.8 ppm cobalt, and 62.1 ppm bismuth (Liss and others, 1997). There is no record of exploration or mining at this site.
Workings: A sample (96BT274) of a 3-inch-thick, malachite-stained, quartz-sulfide vein in slightly chloritized greenstone/diabase at the head of Sixmile Creek contained 33.6 parts per million (ppm) silver, 4,637 ppm copper, 4,107 ppm zinc, 11.8 ppm cobalt, and 62.1 ppm bismuth (Liss and others, 1997). There is no record of exploration or mining at this site.
Alteration: Chlorite.
Commodities (Major) - Ag, Cu, Pb; (Minor) - Bi, Cd, Zn
Development Status: None
Deposit Model: Quartz-sulfide vein(?), 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
2 valid minerals.
Gallery:
List of minerals arranged by Strunz 10th Edition classification
| Group 4 - Oxides and Hydroxides | |||
|---|---|---|---|
| ⓘ | Quartz | 4.DA.05 | SiO2 |
| Group 5 - Nitrates and Carbonates | |||
| ⓘ | Malachite | 5.BA.10 | Cu2(CO3)(OH)2 |
List of minerals for each chemical element
| H | Hydrogen | |
|---|---|---|
| H | ⓘ Malachite | Cu2(CO3)(OH)2 |
| C | Carbon | |
| C | ⓘ Malachite | Cu2(CO3)(OH)2 |
| O | Oxygen | |
| O | ⓘ Malachite | Cu2(CO3)(OH)2 |
| O | ⓘ Quartz | SiO2 |
| Si | Silicon | |
| Si | ⓘ Quartz | SiO2 |
| Cu | Copper | |
| Cu | ⓘ Malachite | Cu2(CO3)(OH)2 |
Other Databases
| Link to USGS - Alaska: | TN045 |
|---|
Other Regions, Features and Areas containing this locality
North AmericaContinent
North America PlateTectonic Plate
- Angayucham TerraneAccretionary Complex
- Ruby DomainDomain
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