Log InRegister
Home PageAbout MindatThe Mindat ManualHistory of MindatCopyright StatusWho We AreContact UsAdvertise on Mindat
Donate to MindatCorporate SponsorshipSponsor a PageSponsored PagesMindat AdvertisersAdvertise on Mindat
Learning CenterWhat is a mineral?The most common minerals on earthInformation for EducatorsMindat ArticlesThe ElementsBooks & Magazines
Minerals by PropertiesMinerals by ChemistryAdvanced Locality SearchRandom MineralRandom LocalitySearch by minIDLocalities Near MeSearch ArticlesSearch GlossaryMore Search Options
Search For:
Mineral Name:
Locality Name:
Keyword(s):
 
The Mindat ManualAdd a New PhotoRate PhotosLocality Edit ReportCoordinate Completion ReportAdd Glossary Item
Mining CompaniesStatisticsUsersMineral MuseumsMineral Shows & EventsThe Mindat DirectoryDevice Settings
Photo SearchPhoto GalleriesNew Photos TodayNew Photos YesterdayMembers' Photo GalleriesPast Photo of the Day GalleryMineral Photography

Lamphear and Moser Mine (Lamphyre Mine), Mokelumne Hill, Mokelumne Hill District, East Belt, Calaveras Co., California, USA

This page is currently not sponsored. Click here to sponsor this page.
 
 
A former lode Au mine located in sec. 18, T5N, R12E, MDM, 1.9 km (1.2 miles) SE of Mokelumne Hill (town), on the ridge along Spring Gulch, NNE of the McSorley Ranch. First operated about 1866. Active during the periods 1870 to 1900 and 1922 to 1930, intermittently. MRDS database stated accuracy for this location is 500 meters.

Mineralization is a vein deposit hosted in slate, amphibolite, and schist. The ore body pinches and swells, strikes NE and dips 45SE at a thickness of 3.35 meters. The hanging wall is slate and the footwall is amphibolite schist on the Lamphear vein, which is 6 to 11 feet thick. Local rocks include Mesozoic granitic rocks, unit 3 (Sierra Nevada, Death Valley area, Northern Mojave Desert and Transverse Ranges).

Workings include underground openings comprised of a 300 foot inclined footwall shaft with levels at 115, 180 and 280 feet. Stoping was mainly above the 180 foot level. Crosscuts and drifts driven as well.

Production data are found in: Clark, Wm. B. & P.A. Lydon (1962).

Analytical data results: Ore assayed at $4.80 (period values) per ton on the N side of the vein, but was poor on the S side. The ore carried 3.5% of concentrates, of which 1% was galena. Concentrates assayed approximately $65 per ton (period values).

Mineral List



3 entries listed. 3 valid minerals.

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

Logan, Clarence August (1924), Sacramento field division: California Mining Bureau. Report 20: 76.

Logan, Clarence August (1925), Sacramento field division: California Mining Bureau. (Report 21): 21(2): 155.

Logan, Clarence August and Franke, H. (1936), Mines and Mineral Resources of Calaveras Co.: California Division of Mines, California Journal of Mines & Geology, California Division of Mines (Report 32): 32(3): 267, 310, Pl. 7.

California Division of Mines Economic Mineral Map of California No. 6 (194_).

Goodwin, Joseph Grant (1957) Lead and zinc in California. California Journal of Mines and Geology, Division of Mines: 53(3&4): 431.

Clark, Wm. B. & P.A. Lydon (1962), Mines and mineral resources of Calaveras County, California: California Division of Mines & Geology County Report 2; [… Geological Society of America Proceedings, 1933: 312-313, 1934]: 60, 161, 169, Pl. B.

USGS (2005), Mineral Resources Data System (MRDS): U.S. Geological Survey, Reston, Virginia, loc. file ID #10028927 & 10114692.

EC Mineral map No. 12, P 95 (?? - no such EC mineral map - may be Crawford, James John (1894), Twelfth report of the State Mineralogist: California Mining Bureau. (Report 12): 12: 95.)

U.S. Bureau of Mines, Minerals Availability System (MAS) file ID #0060090522.

 
Mineral and/or Locality  
Mindat.org is an outreach project of the Hudson Institute of Mineralogy, a 501(c)(3) not-for-profit organization. Public Relations by Blytheweigh.
Copyright © mindat.org and the Hudson Institute of Mineralogy 1993-2020, except where stated. Most political location boundaries are © OpenStreetMap contributors. Mindat.org relies on the contributions of thousands of members and supporters.
Privacy Policy - Terms & Conditions - Contact Us Current server date and time: March 28, 2020 22:02:56 Page generated: January 11, 2015 16:32:40
Go to top of page