Sue Creek Prospect, Aniak Mining District, Bethel Census Area, Alaska, USAi
Regional Level Types | |
---|---|
Sue Creek Prospect | Prospect |
Aniak Mining District | Mining District |
Bethel Census Area | Census Area |
Alaska | State |
USA | Country |
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Latitude & Longitude (WGS84):
61° 42' 6'' North , 158° 32' 38'' West
Latitude & Longitude (decimal):
Type:
KΓΆppen climate type:
Nearest Settlements:
Place | Population | Distance |
---|---|---|
Crooked Creek | 105 (2016) | 29.5km |
Mindat Locality ID:
200196
Long-form identifier:
mindat:1:2:200196:1
GUID (UUID V4):
e15b5ec4-2895-41c1-aad2-3186db2c7af2
Location: The Sue Creek prospect at an elevation of about 2,800 feet on the ridge between the Whitewing Valley and the headwaters of the eastern tributary of Sue Creek. The prospect is about 1.2 mile south-southwest of peak 3461 and about 0.6 mile southwest of the center of sec. 28, T. 19 N., R. 51 W., of the Seward Meridian. The location is accurate.
Geology: The Sue Creek prospect is a large area of hydrothermal alteration and mineralization in the contact zone between border phases of the Cretaceous Horn Mountains pluton and hornfels (Bundtzen and others, 1998). The border phase of the pluton is composed of altered, porphyritic, potassium- feldspar-rich diorite, granite and quartz monzonite. The hornfels is a dark gray to bleached metasiltstone and recrystallized metasandstone. Late aphanitic, felsic dikes cut both the pluton and the hornfels. A northwest-trending high-angle fault crosses the mineralized area and forms part of the southern boundary of the Horn Mountains. The mineralized area, which covers an area at least 200 feet by 200 feet in size, consists of tourmaline, axinite, quartz, and goethite flooding mainly in hornfels, although some of the goethite flooding occurs in porphyritic granite. The sulfides have been completely altered to a dark brown network of sooty goethite veins, which locally comprise up to 40 percent of the hornfels. Immediately adjacent to the intrusion, a quartz-axinite ferricrete zone about 65 feet thick contains nearly 50 percent brown axinite. The mineralized veins and Fe-boxwork are covered by vegetation to the east and west of the prospect area. Sixteen chip samples taken along about 130 feet of mineralization contained up to 570 parts per million (ppm) zinc,140 parts per billion (ppb) gold, 788 ppm arsenic, 337 ppm antimony, 102 ppm tungsten, and 33 ppm tin (Bundtzen and others, 1998). Although all samples contained sub-economic amounts of metals, the large extent of the mineralized zone may indicate a larger zone at depth. An unnamed occurrence 400 meters further to the southeast described in Bundtzen and others (1998)may be an extension of the Sue Creek prospect. The occurrence is in an area of where anomalous stream sediment and panned concentrate samples were collected (Gray and others, 1994; Theodorakos and others, 1992). The stream sediment samples contained up to 700 ppb gold, 680 ppb silver, 120 ppm copper, 370 ppm arsenic, 35 ppm antimony, and other elevated metal values. Panned concentrates contained up to 30.0 ppm gold, 15.0 ppm silver, 2,000 ppm lead, 300 ppm antimony, 1,000 ppm bismuth, and 700 ppm tungsten; several samples contained microscopically visible gold, scheelite, and barite.
Workings: Surface sampling was conducted by the Alaska Division of Geological and Geophysical Surveys in 1991 and 1992. A geologic prospect sketch produced during that investigation is provided in Bundtzen and others (1998).
Age: In the contact-metamorphic zone of the Horn Mountain intrusive which was been dated at 68-69 Ma (Bundtzen and others, 1998).
Alteration: Axinite-tourmaline-sulfide greisen.
Commodities (Major) - As, Sb, W, Zn; (Minor) - Au, Mo, Sn
Development Status: None
Deposit Model: Silver-polymetallic veins or tin veins (Cox and Singer, 1986; models 20b or 15b
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.
Detailed Mineral List:
β 'Axinite Group' |
β Goethite Formula: Ξ±-Fe3+O(OH) |
β Quartz Formula: SiO2 |
β 'Tourmaline' Formula: AD3G6 (T6O18)(BO3)3X3Z |
Gallery:
List of minerals arranged by Strunz 10th Edition classification
Group 4 - Oxides and Hydroxides | |||
---|---|---|---|
β | Goethite | 4.00. | Ξ±-Fe3+O(OH) |
β | Quartz | 4.DA.05 | SiO2 |
Unclassified | |||
β | 'Tourmaline' | - | AD3G6 (T6O18)(BO3)3X3Z |
β | 'Axinite Group' | - |
List of minerals for each chemical element
H | Hydrogen | |
---|---|---|
H | β Goethite | Ξ±-Fe3+O(OH) |
B | Boron | |
B | β Tourmaline | AD3G6 (T6O18)(BO3)3X3Z |
O | Oxygen | |
O | β Goethite | Ξ±-Fe3+O(OH) |
O | β Quartz | SiO2 |
O | β Tourmaline | AD3G6 (T6O18)(BO3)3X3Z |
Si | Silicon | |
Si | β Quartz | SiO2 |
Fe | Iron | |
Fe | β Goethite | Ξ±-Fe3+O(OH) |
Other Databases
Link to USGS - Alaska: | SM034 |
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Other Regions, Features and Areas containing this locality
North America PlateTectonic Plate
- Farewell buried DomainDomain
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