Mother; Murphy; Stipp; Logan and Murphy Prospect, Fairbanks Mining District, Fairbanks North Star Borough, Alaska, USAi
| Regional Level Types | |
|---|---|
| Mother; Murphy; Stipp; Logan and Murphy Prospect | Prospect |
| Fairbanks Mining District | Mining District |
| Fairbanks North Star Borough | Borough |
| Alaska | State |
| USA | Country |
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Latitude & Longitude (WGS84):
64° 53' 45'' North , 148° 7' 33'' West
Latitude & Longitude (decimal):
Type:
Köppen climate type:
Nearest Settlements:
| Place | Population | Distance |
|---|---|---|
| Ester | 2,422 (2011) | 7.5km |
| College | 12,964 (2011) | 15.8km |
| South Van Horn | 558 (2017) | 18.6km |
| Farmers Loop | 4,853 (2017) | 20.2km |
| Fairbanks | 32,325 (2017) | 20.4km |
Location: The Mother prospect is located in the SW1/4SE1/4 sec. 22, T. 1 N., R. 3 W., Fairbanks Meridian. The prospect is on a ledge just east of the west fork of Nugget Creek. The prospect is about 2.4 miles northwest of the top of Ester Dome and at an elevation of about 1,200 feet. The prospect is locality 1 of Cobb (1972 [MF 410]).
Geology: Brecciated, iron-stained quartz and silicified schist assayed $0.46 gold per ton (0.022 ounce of gold per ton) (Hill, 1933, p. 122). At the creek level, the vein structure is approximately 20 feet wide. In a cut near the top of the ridge a quarter of a mile east of the creek, a vein consisted of 10 feet of quartz breccia on the north wall and 10 feet of bluish clay with quartz fragments above the south wall. The quartz next to the north wall showed evidence of mineralization and was reported to average $20 of gold per ton (0.97 ounce of gold per ton) in a small area where the upper work was being done (Hill, 1933, p. 122). The clay and quartz carried only a few cents in gold per ton. Some pieces of high-grade quartz with free gold were noted (Hill, 1933, p. 122).
Workings: By 1931, development at this prospect included several open cuts and three tunnels; one was near the creek level and two were near the crest of the ridge to the east. All were caved at the time of Hill's visit (Hill, 1933, p. 121).
Alteration: Quartz is brecciated and iron-stained, and schist is silicified (Hill, 1933).
Commodities (Major) - Au
Development Status: None
Deposit Model: Schist-hosted gold-quartz vein
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
1 valid mineral.
Detailed Mineral List:
| ⓘ Native Gold Formula: Au |
Gallery:
List of minerals arranged by Strunz 10th Edition classification
| Group 1 - Elements | |||
|---|---|---|---|
| ⓘ | Native Gold | 1.AA.05 | Au |
List of minerals for each chemical element
| Au | Gold | |
|---|---|---|
| Au | ⓘ Native Gold | Au |
Other Databases
| Link to USGS - Alaska: | FB002 |
|---|
Other Regions, Features and Areas containing this locality
North AmericaContinent
North America PlateTectonic Plate
- North America PlatformPassive Margin
- Yukon-Tanana lower DomainDomain
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