Van Horn Prospect, Juneau District, Hoonah-Angoon Borough, Alaska, USA
| Latitude & Longitude (WGS84): | 59° 1' 12'' North , 136° 6' 34'' West |
|---|---|
| Latitude & Longitude (decimal): | 59.02000,-136.10972 |
| Köppen climate type: | Dfc : Subarctic climate |
The prospect is within Glacier Bay National Park and Preserve where exploration and development are restricted.
Location: This prospect is located at an elevation of about 1,500 feet in Glacier Bay National Park and Preserve on the east side of Muir Inlet near Peak 2124 at the southwestern end of Van Horn Ridge. It is near the center of section 8, T. 33 S., R. 56 E. of the Copper River Meridian. It is shown as location 71 on plate III of Brew and others (1978) and location 11 on plate 1 of MacKevett and others (1971).
Geology: Brew and others (1978) describe the prospect as, 'Weakly mineralized iron-stained altered zones in hornfels, shale, and granodiorite. Most of the zones are along faults and are a few feet wide, not persisting along strike.' The hornfels strikes northerly and dip steeply (MacKevett and others, 1971). A composite grab sample of iron-stained shale contained 150 ppm copper and 15 ppm molybdenum (Brew and others,1978). A select sample of an iron-stained shear zone contained 100 ppm copper and 200 ppm molybdenum (MacKevett and others, 1971). The age of the mineralization is probably Cretaceous or younger based upon the Cretaceous age of the intrusive rocks (Brew and others, 1978).
Workings: Brew and others (1978) state that 65 claims were staked on the ridge in 1965 and that a few shallow trenches and pits explore some of the mineralized zones.
Age: Cretaceous or younger based on the age of the associated intrusive rocks (Brew and others, 1978).
Alteration: Iron-stained altered zones.
Commodities (Major) - Cu, Mo
Development Status: None
Deposit Model: Weakly mineralized shear zone. There is little information on which to assign a
Commodity List
This is a list of exploitable or exploited mineral commodities recorded at this locality.No minerals currently recorded for this locality.
Regional Geology
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
| Paleogene 23.03 - 66 Ma ID: 3190103 | Cenozoic intrusive rocks Age: Paleogene (23.03 - 66 Ma) Lithology: Intrusive igneous rocks Reference: Chorlton, L.B. Generalized geology of the world: bedrock domains and major faults in GIS format: a small-scale world geology map with an extended geological attribute database. doi: 10.4095/223767. Geological Survey of Canada, Open File 5529. [154] |
| Cretaceous 66 - 145 Ma ID: 1682439 | Migmatite and metaplutonic rocks Age: Cretaceous (66 - 145 Ma) Description: Migmatite - found in Geikie and Muir provinces, and associated with granitic units Kggd and Kgto (Brew, pers. comm., 1999). Lithology: Metamorphic 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. [21] |
Data and map coding provided by Macrostrat.org, used under Creative Commons Attribution 4.0 License
References
