Haley and Hanlon Prospect, Chichagof District, Sitka Borough, Alaska, USA
|Latitude & Longitude (WGS84):||57° 2' 26'' North , 135° 11' 45'' West|
|Latitude & Longitude (decimal):||57.04056,-135.19583|
|Köppen climate type:||Dfc : Subarctic climate|
Location: Bittenbender and others (1999; location P-117) and Cobb (1972; 1978, location 58) locate the Haley and Hanlon prospect at an elevation of about 450 feet just east of Herring Cove, in the NW1/4SW1/4 sec. 2, T. 56 S., R. 64 E. The US Bureau of Land Management (2002, MAS no. 0021140042) locates the prospect at an elevation of about 850 feet about a mile to the northeast. This site is plotted at the location of Bittenbender and others and Cobb, the more likely of the two. The location is probably accurate to within 0.5 mile.
Geology: The rocks in the vicinity of this prospect are part of the Jurassic and Triassic, Khaz Formation which consists of graywacke, greenschist, metachert, phyllite, and minor limestone (Loney and others, 1975). This prospect consists of a 15-foot adit driven along a fault in hornblendite (Kennedy and Walton, 1946 [B947-C], B 947-D]) Hornblendite is not typical of the Khaz Formation and Loney and others (1975) do not map any hornblendite in this area. Masses of pyrite with minor chalcopyrite occur in the fault in the adit; the largest such mass is 10 inches wide and 2 to 3 feet long. A sample contained 0.99 percent copper, 0.20 percent nickel, and 0.09 percent cobalt. The prospect was not found by Bittenbender and others (1999).
Workings: A 15-foot adit was driven on the property prior to 1946.
Age: Triassic or younger based on the age of the host rocks.
Commodities (Major) - Co, Cu, Ni
Development Status: None
Deposit Model: Masses of pyrrhotite with chalcopyrite along a fault.
Commodity ListThis is a list of exploitable or exploited mineral commodities recorded at this locality.
2 valid minerals.
This geological map and associated information on rock units at or nearby to the coordinates given for this locality is based on relatively small scale geological maps provided by various national Geological Surveys. This does not necessarily represent the complete geology at this locality but it gives a background for the region in which it is found.
Click on geological units on the map for more information. Click here to view full-screen map on Macrostrat.org
66 - 145 Ma
Age: Cretaceous (66 - 145 Ma)
Stratigraphic Name: Khaz Complex
Description: The Khaz Complex is a name revision herein for the Khaz Formation of Loney and others (1975). The name is revised because the term formation is used for stratigraphic units; rocks of the the Khaz Complex do not retain internal stratigraphy, do not have stratigraphic relations to adjacent units, and are characterized by pervasive ductile to brittle high strain deformation textures. The Khaz Complex is composed dominantly of slatey argillite and tuff that contain blocks of various sedimentary, volcanic, plutonic, and metamorphic lithologies. The argillite, tuff, and graywacke matrix lithologies are locally massive, locally retain turbidite depositional features, and locally contain slump structures and slumped blocks. Chaotic deformation disrupts layering. Tectonic blocks incorporated into the matrix include volcanic and sedimentary rocks from the downgoing oceanic plate, sedimentary and igneous rocks from the accretionary wedge, metamorphic rocks from deeper in the subduction complex, and rocks derived from the upper plate that are mixed by multiple generations of faults. The Khaz Complex correlates with other components of the mlange facies of the upper Mesozoic Chugach accretionary complex of Plafker and others (1976), including parts of the Uyak Complex on Kodiak Island, the McHugh Complex of the Chugach Mountains, and the mlange facies of the Yakutat Group
Reference: Wilson, F.H., Hults, C.P., Mull, C.G, and Karl, S.M. (compilers). Geologic map of Alaska. doi: 10.3133/sim3340. U.S. Geological Survey Scientific Investigations Map 3340, pamphlet 196.