Unnamed Occurrence (ARDF - SI147; northeast of Slocum Arm), Chichagof Mining District (Chicagof Mining District), Sitka, Alaska, USAi
This page is currently not sponsored. Click here to sponsor this page.
Latitude & Longitude (WGS84):
57° 28' 18'' North , 135° 47' 27'' West
Latitude & Longitude (decimal):
Köppen climate type:
Nearest Settlements:
| Place | Population | Distance |
|---|---|---|
| Sitka | 8,863 (2017) | 54.1km |
Mindat Locality ID:
201592
Long-form identifier:
mindat:1:2:201592:0
GUID (UUID V4):
c5078094-13c0-4060-94f0-c2217d83e1f8
The occurrence is in West Chichagof-Yakobi Wilderness.
Location: This occurrence is at an elevation of about 1,900 feet, about a mile east-northeast of Flat Cove in Slocum Arm. The occurrence is 0.3 mile south of the center of sec. 4, T. 51 S., R. 60 E. It is location P-95 of Bittenbender and others (1999), location 45 of Cobb (1972, 1978), and MAS no. 0021140136 (U.S. Bureau of Land Management, 2002). The location is accurate within about 0.5 mile.
Geology: Johnson and Karl (1985) map the rocks in the area of this occurrence as Triassic(?) greenstone and marble, Cretaceous(?) phyllite, and the Freeburn assemblage, a collage of kilometer-scale, fault-bounded, lozenge-shaped blocks of Cretaceous and Cretaceous(?) metasedimentary and metavolcanic rocks. The contact between the Triassic(?) strata and the Cretaceous/Cretaceous(?) strata is the Border Ranges Fault, a regional-scale, high-angle fault that strikes northwest. Other faults in the area strike northwest, north, and east-southeast. One of them appears to offset the Border Ranges Fault for about 2 miles along a right-lateral fault. Cobb (1972, 1978), citing Loney and others (1963), describes the occurrence as disseminated sulfides and secondary copper minerals in greenstone. Bittenbender and others (1999), citing Ballard (1968) and Still and Weir (1981), describe the occurrence as a porphyry molybdenum deposit that extends over an area of at least a square mile. They specify the country rocks as greenstone intruded by granodiorite, but do not name the ore minerals.
Commodities (Major) - Mo
Development Status: None
Deposit Model: Porphyry molybdenum deposit? (Cox and Singer, 1986; models 21b).
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.
Gallery:
List of minerals arranged by Strunz 10th Edition classification
| 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 |
| Cu | Copper | |
| Cu | ⓘ Malachite | Cu2(CO3)(OH)2 |
Other Databases
| Link to USGS - Alaska: | SI147 |
|---|
Other Regions, Features and Areas containing this locality
North America PlateTectonic Plate
- Chugach DomainDomain
This page contains all mineral locality references listed on mindat.org. This does not claim to be a complete list. If you know of more minerals from this site, please register so you can add to our database. This locality information is for reference purposes only. You should never attempt to
visit any sites listed in mindat.org without first ensuring that you have the permission of the land and/or mineral rights holders
for access and that you are aware of all safety precautions necessary.
References
