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:
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

Moore Mine, Duncan Hill, Auburn, Ophir District (Auburn District; Duncan Hill District), Placer Co., California, USA

This page is currently not sponsored. Click here to sponsor this page.
Latitude & Longitude (WGS84): 38° 53' 33'' North , 121° 5' 52'' West
Latitude & Longitude (decimal): 38.8925, -121.097777778
A former lode Au-Zn-Ag-Pb-Cu occurrence/mine located in the NE¼ sec. 17, T12N, R8E, MDM, 0.6 km (0.3 mile) S of Duncan Hill (coordinates of record) (on the upper S slope of the hill) (2 miles SW of Auburn), on private (patented) land. MRDS database stated accuracy for this location is 100 meters.

Mineralization is a vein deposit hosted in granodiorite and amphibolite. The ore body strikes E and dips 55S at a thickness of 0.25 meter. The vein averages 10 inches (25 cm) thick.
Local rocks include Mesozoic granitic rocks, unit 3 (Sierra Nevada, Death Valley area, Northern Mojave Desert and Transverse Ranges).

Workings include underground openings with a length of 80 meters and an overall depth of 134.11 meters and comprised of an inclined shaft, drifts and stopes.

Production data are found in: Logan, Clarence August (1936).

The total yield through 1898 was estimated at $180,000 (period values). No other production record was found.

Mineral List

7 entries listed. 6 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.


Lindgren, Waldemar (1894a), The gold-silver veins of Ophir, California: UGS 14th. Ann. Report, part 2: 243-284; […(abstract): Mining and Scientific Press: 71: 216, 233 (1895); Journal of Geology: 4: 373-374 (1896); …Nature: 53: 466 (1896)]: 205, 251, 263, 266, Pl. __. (reference plate number truncated by the USGS MRDS database)

Logan, Clarence August (1936), Gold mines of Placer County: California Division Mines, California Journal of Mines and Geology (Report 32): 32(1): 28, 46.

Crawford, James John (1896), Gold-placer: Thirteenth report of the State Mineralogist: California Mining Bureau. (Report 13): 13: 283.

Waring, Clarence A. (1917), Placer County: Report 15 of the State Mineralogist, California State Mining Bureau (Report 15): 15: 318, 345.

Murdoch, Joseph & Robert W. Webb (1966), Minerals of California, Centennial Volume (1866-1966): California Division Mines & Geology Bulletin 189: 205.

Pemberton, H. Earl (1983), Minerals of California; Van Nostrand Reinholt Press: 27.

USGS (2005), Mineral Resources Data System (MRDS): U.S. Geological Survey, Reston, Virginia, loc. file ID #10007710 & 10213190.

U.S. Bureau of Mines, Minerals Availability System (MAS) file #0060610160.

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: January 27, 2020 10:38:59 Page generated: September 21, 2015 12:03:23
Go to top of page