Green Wonder Prospect, Delta River Mining District, Southeast Fairbanks Census Area, Alaska, USAi
Regional Level Types | |
---|---|
Green Wonder Prospect | Prospect |
Delta River Mining District | Mining District |
Southeast Fairbanks Census Area | Census Area |
Alaska | State |
USA | Country |
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Latitude & Longitude (WGS84):
63° 18' 21'' North , 146° 4' 40'' West
Latitude & Longitude (decimal):
Type:
Köppen climate type:
Mindat Locality ID:
197814
Long-form identifier:
mindat:1:2:197814:1
GUID (UUID V4):
108c045c-783c-4042-97b8-32fb77a9d12d
Zinc mineralization at this site is unique in the area between Broxson Gulch and the Rainy Creek area.
Location: The Green Wonder prospect is at an elevation of 4,600 feet, a mile east of the east fork of the stream(s) in Broxson Gulch, and about 1,800 feet southwest of peak 5304 on the boundary between sections 31 and 32, T. 18 S., R. 9 E., Fairbanks Meridian. The prospect corresponds to locality 55 in table 2 of Nokleberg and others (1991), locality 38 on figure 4 of Cobb (1979 [OFR 79-238]), and locality 13 on figure 2 of Rose (1965).
Geology: The Green Wonder prospect is in an amphibolitized serpentine unit in contact with graywacke and meta-andesite of the Slana Spur Formation of Late Paleozoic age (Rose, 1965; Nokleberg and others, 1991). The serpentinized unit is part of the informally named Eureka ultramafic complex of Late Triassic age that is emplaced on strands of the Broxson Gulch thrust fault (W.T. Ellis, unpublished data, 1996). At the prospect site, the altered serpentinite is converted to an almost white, diopside-garnet-quartz skarn. The deposit is a mineralized zone less than a foot wide of a bright green rock composed of sphalerite and uvarovite (a chrome garnet) and minor pyrite. The rock assayed 10 percent or more zinc, 4 percent chrome, and 2 percent nickel (Rose, 1965, p. 29). A 60-foot-wide diabase dike cuts meta-andesite near the Green Wonder prospect site. The dike contains disseminated chalcopyrite. Sample 79IL020C of Nokleberg and others (1991, locality 55, table 2) assayed 0.72 percent copper, 0.3 percent vanadium, and 7 parts per million silver.
Workings: The Green Wonder deposit was located and trenched in 1964 by Moneta-Porcupine Company. The area was subsequently mapped by Rose (1965). The prospect is on active MAN Resources claims.
Age: Late Triassic or younger.
Alteration: Pervasive quartz-garnet-diopside skarn alteration of amphibolitized serpentinite; a sphalerite-uvarovite skarn formed at the Green Wonder mineral locality.
Commodities (Major) - Cu, Zn; (Minor) - Ag, Cr, Cu, Ni, V
Development Status: None
Deposit Model: Skarn affiliated with mafic-ultramafic host rock.
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:
ⓘ Chalcopyrite Formula: CuFeS2 |
ⓘ Diopside Formula: CaMgSi2O6 |
ⓘ Pyrite Formula: FeS2 |
ⓘ Quartz Formula: SiO2 |
ⓘ Sphalerite Formula: ZnS |
ⓘ Uvarovite Formula: Ca3Cr2(SiO4)3 |
Gallery:
List of minerals arranged by Strunz 10th Edition classification
Group 2 - Sulphides and Sulfosalts | |||
---|---|---|---|
ⓘ | Sphalerite | 2.CB.05a | ZnS |
ⓘ | Chalcopyrite | 2.CB.10a | CuFeS2 |
ⓘ | Pyrite | 2.EB.05a | FeS2 |
Group 4 - Oxides and Hydroxides | |||
ⓘ | Quartz | 4.DA.05 | SiO2 |
Group 9 - Silicates | |||
ⓘ | Uvarovite | 9.AD.25 | Ca3Cr2(SiO4)3 |
ⓘ | Diopside | 9.DA.15 | CaMgSi2O6 |
List of minerals for each chemical element
O | Oxygen | |
---|---|---|
O | ⓘ Diopside | CaMgSi2O6 |
O | ⓘ Quartz | SiO2 |
O | ⓘ Uvarovite | Ca3Cr2(SiO4)3 |
Mg | Magnesium | |
Mg | ⓘ Diopside | CaMgSi2O6 |
Si | Silicon | |
Si | ⓘ Diopside | CaMgSi2O6 |
Si | ⓘ Quartz | SiO2 |
Si | ⓘ Uvarovite | Ca3Cr2(SiO4)3 |
S | Sulfur | |
S | ⓘ Chalcopyrite | CuFeS2 |
S | ⓘ Pyrite | FeS2 |
S | ⓘ Sphalerite | ZnS |
Ca | Calcium | |
Ca | ⓘ Diopside | CaMgSi2O6 |
Ca | ⓘ Uvarovite | Ca3Cr2(SiO4)3 |
Cr | Chromium | |
Cr | ⓘ Uvarovite | Ca3Cr2(SiO4)3 |
Fe | Iron | |
Fe | ⓘ Chalcopyrite | CuFeS2 |
Fe | ⓘ Pyrite | FeS2 |
Cu | Copper | |
Cu | ⓘ Chalcopyrite | CuFeS2 |
Zn | Zinc | |
Zn | ⓘ Sphalerite | ZnS |
Other Databases
Link to USGS - Alaska: | MH126 |
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Other Regions, Features and Areas containing this locality
North America PlateTectonic Plate
- Wrangellia DomainDomain
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