Home Page	Log In	Messageboard	The Mindat Directory
Register	Search Pages	Mineral Chatroom	The Mindat Store

Big Rock claim, Hyampom, Klamath Mts, Trinity Co., California, USA

Latitude: 40°38'59"N
Longitude: 123°27'7"W

Display
- Standard
- Detailed
- By Strunz Category
- By Dana Category
Photos
- Add Photo
Maps
- Map Pages
- Nearest Localities
Search

A Mn occurrence located in sec. 12, T3N, R6E, HM, 3.6 km (2.2 miles) N of Hyampom, on National Forest land (located claim). Discovered 1940. Owned by William Rowland, California (1974), and by Emil V. Lehmann, Jr., California (1974). MRDS database stated accuracy for this location is 1,000 meters.

Mineralization is hosted in chert (Late Jurassic). The ore is a very low grade deposit of red and purple chert with thin films of Mn oxide. The chert is surrounded by greenstone and serpentine. Local rocks include Paleozoic marine rocks, undivided, unit 9 (Western Klamath Mountains).

Workings include surface operations.

Analytical data results: The ore grade is 0.81% Mn.

Mineral List

'Manganese Oxides'

1 entry listed.

The above list 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

Trask, Parker Davies, Ivan F. Wilson & F.S. Simons (1943), Manganese deposits of California – a summary report: California Division Mines Bulletin 125: 195.

Trask, Parker Davies (1950) Geologic description of the manganese deposits of California. California Division of Mines Bulletin 152, 378 pp.: 306-307.

USGS (2005), Mineral Resources Data System (MRDS): U.S. Geological Survey, Reston, Virginia, loc. file ID #10095209 & 10214368.

U.S. Bureau of Mines, Minerals Availability System (MAS) file ID #0061050013.

This page is currently not sponsored. To sponsor this page click here.

Mineral	and/or Locality
Search Google

Copyright © Jolyon Ralph and Ida Chau 1993-2012. Site Map. Locality, mineral & photograph data are the copyright of the individuals who submitted them. Further information contact the Site hosted & developed by Jolyon Ralph. Mindat.org is an online information resource dedicated to providing free mineralogical information to all. Mindat relies on the contributions of hundreds of members and supporters. Mindat does not offer minerals for sale. If you would like to add information to improve the quality of our database, then click here to register.
Current server date and time: 23rd Jun 2012 16:20:16