Wannemaker and Wortman; Workman's Bench Prospect, Koyukuk Mining District, Yukon-Koyukuk Census Area, Alaska, USAi
Regional Level Types | |
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Wannemaker and Wortman; Workman's Bench Prospect | Prospect |
Koyukuk Mining District | Mining District |
Yukon-Koyukuk Census Area | Census Area |
Alaska | State |
USA | Country |
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Latitude & Longitude (WGS84):
67° 28' 8'' North , 150° 13' 26'' West
Latitude & Longitude (decimal):
Type:
Köppen climate type:
Mindat Locality ID:
202821
Long-form identifier:
mindat:1:2:202821:0
GUID (UUID V4):
b4a9832b-f95b-464c-9e70-ed7b591c0d41
See also Jones and Boyle (WI114).
Location: This prospect is at an elevation of about 1,800 feet on the south side of lower Smith Creek, 0.2 mile east of the junction of Smith and Nolan Creeks. A mine symbol on the Wiseman B-1 topographic map accurately represents the location of this prospect.
Geology: This prospect consists of a 3 to 4 inch-wide quartz-stibnite vein exposed in a trench about 150 feet above creek level on the south side of Smith Creek. The stibnite fills open spaces between quartz crystals with euhedral terminations deposited along the margins of the vein (Ebbley and Wright, 1948). Mulligan (1974) noted that the vein occupies a vertical fissure that cuts across a flat-lying, blue-gray phyllite. Selected rock samples from this prospect contain as much as 12.2 ppm gold and are anomalous in arsenic (Eden, 2000) and up to 58.3% Sb (Mulligan, 1974). Eden, based on geochemical data and not direct observation, suggests that accessory galena and cinnabar may accompany the primary stibnite-arsenopyrite-gold mineralization. Eden (2000) describes auriferous quartz veins containing stibnite and arsenopyrite in the general area. Calcite, ankerite and minor dolomite accompany the quartz at the margins of these veins, which strike N 44 E and dip nearly vertically. The gold is mostly near the margins of the veins and is rare in the stibnite (Eden, 2000).
Workings: The vein is exposed for 8 ft along strike in a surface trench (Mulligan, 1974).
Alteration: The vein does not show an alteration envelope (Eden, 2000).
Commodities (Major) - Au, Sb; (Minor) - As, Hg(?), Pb(?)
Development Status: None
Deposit Model: Sb-Au vein (Nokleberg and others, 1987), as adapted from a simple Sb deposit mo
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
9 valid minerals.
Detailed Mineral List:
ⓘ Ankerite ? Formula: Ca(Fe2+,Mg)(CO3)2 |
ⓘ Arsenopyrite Formula: FeAsS |
ⓘ Calcite Formula: CaCO3 |
ⓘ Cinnabar Formula: HgS |
ⓘ Dolomite Formula: CaMg(CO3)2 |
ⓘ Galena Formula: PbS |
ⓘ Gold Formula: Au |
ⓘ Quartz Formula: SiO2 |
ⓘ Stibnite Formula: Sb2S3 |
Gallery:
List of minerals arranged by Strunz 10th Edition classification
Group 1 - Elements | |||
---|---|---|---|
ⓘ | Gold | 1.AA.05 | Au |
Group 2 - Sulphides and Sulfosalts | |||
ⓘ | Galena | 2.CD.10 | PbS |
ⓘ | Cinnabar | 2.CD.15a | HgS |
ⓘ | Stibnite | 2.DB.05 | Sb2S3 |
ⓘ | Arsenopyrite | 2.EB.20 | FeAsS |
Group 4 - Oxides and Hydroxides | |||
ⓘ | Quartz | 4.DA.05 | SiO2 |
Group 5 - Nitrates and Carbonates | |||
ⓘ | Calcite | 5.AB.05 | CaCO3 |
ⓘ | Ankerite ? | 5.AB.10 | Ca(Fe2+,Mg)(CO3)2 |
ⓘ | Dolomite | 5.AB.10 | CaMg(CO3)2 |
List of minerals for each chemical element
C | Carbon | |
---|---|---|
C | ⓘ Ankerite | Ca(Fe2+,Mg)(CO3)2 |
C | ⓘ Calcite | CaCO3 |
C | ⓘ Dolomite | CaMg(CO3)2 |
O | Oxygen | |
O | ⓘ Ankerite | Ca(Fe2+,Mg)(CO3)2 |
O | ⓘ Calcite | CaCO3 |
O | ⓘ Dolomite | CaMg(CO3)2 |
O | ⓘ Quartz | SiO2 |
Mg | Magnesium | |
Mg | ⓘ Ankerite | Ca(Fe2+,Mg)(CO3)2 |
Mg | ⓘ Dolomite | CaMg(CO3)2 |
Si | Silicon | |
Si | ⓘ Quartz | SiO2 |
S | Sulfur | |
S | ⓘ Arsenopyrite | FeAsS |
S | ⓘ Cinnabar | HgS |
S | ⓘ Galena | PbS |
S | ⓘ Stibnite | Sb2S3 |
Ca | Calcium | |
Ca | ⓘ Ankerite | Ca(Fe2+,Mg)(CO3)2 |
Ca | ⓘ Calcite | CaCO3 |
Ca | ⓘ Dolomite | CaMg(CO3)2 |
Fe | Iron | |
Fe | ⓘ Ankerite | Ca(Fe2+,Mg)(CO3)2 |
Fe | ⓘ Arsenopyrite | FeAsS |
As | Arsenic | |
As | ⓘ Arsenopyrite | FeAsS |
Sb | Antimony | |
Sb | ⓘ Stibnite | Sb2S3 |
Au | Gold | |
Au | ⓘ Gold | Au |
Hg | Mercury | |
Hg | ⓘ Cinnabar | HgS |
Pb | Lead | |
Pb | ⓘ Galena | PbS |
Other Databases
Link to USGS - Alaska: | WI115 |
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Other Regions, Features and Areas containing this locality
North America
- Brooks RangeMountain Range
- Rocky MountainsMountain Range
North America PlateTectonic Plate
- Brooks Range DomainDomain
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