Help|Log In|Register|
Home PageMindat NewsThe Mindat ManualHistory of MindatCopyright StatusManagement TeamContact UsAdvertise on Mindat
Donate to MindatSponsor a PageSponsored PagesTop Available PagesMindat AdvertisersAdvertise on MindatThe Mindat Store
Minerals by PropertiesMinerals by ChemistryRandom MineralSearch by minIDLocalities Near MeSearch GlossaryMore Search Options
Search For:
Mineral Name:
Locality Name:
The Mindat ManualAdd a New PhotoRate PhotosLocality Edit ReportCoordinate Completion ReportAdd Glossary Item
StatisticsThe ElementsMember ListBooks & MagazinesMineral Shows & EventsThe Mindat DirectoryHow to Link to MindatDevice Settings
Photo SearchPhoto GalleriesNew Photos TodayNew Photos YesterdayMembers' Photo GalleriesPast Photo of the Day Gallery

Questa Molybdenum Mine (Questa Mine; Moly Mine; R and S Mine), Questa, Taos Co., New Mexico, USA

This page is currently not sponsored. Click here to sponsor this page.
Latitude & Longitude (WGS84): 36° 42' 15'' North , 105° 30' 23'' West
Latitude & Longitude (decimal): 36.7041666667, -105.506388889
An active molybdenum-rhenium mine owned by Molycorp, a subsidiary of Unocal Corp. Produced 4,760 tons of Mo in concentrates (1984).

Located nine miles from Questa, the mine opened in 1916 as the R&S Molybdenum mine. It was purchased by Molycorp Minerals in 1950 and became a subsidiary of Chevron in 2005. Formerly an open pit excavation, the Chevron Questa mine has operated as an underground mine since 1982.

Mineral List

31 entries listed. 25 valid minerals.

The above list contains all mineral locality references listed on 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 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.


J. H. Schilling, (1956) Geology of the Questa Molybdenum Mine Area, Taos County, New Mexico. NMBGMR Bulletin 51.

K. F. Clark and C. B. Read, (1972) Geology and Ore Deposits of Eagle Nest area, New Mexico. NMBGMR Bulletin 94.

Mining Annual Review (1985): 118 & 331.

Cline, Jean S. & Bodnar, Robert J. (1994): Direct evolution of brine from a crystallizing silicic melt at the Questa, New Mexico, molybdenum deposit. Economic Geology 89, 1780-1802.

Campbell, A.R., and Lueth, V.W. (2008): Isotopic and textural discrimination between hypogene, ancient supergene, and modern sulfates at the Questa Mine, New Mexico. Applied Geochemistry 23, 308-319.

Junxing Zhao, Kezhang Qin, Guangming Li, and Jinxiang Li (2011): Characteristics of alteration and mineralization in the Sharang porphyry molybdenum deposit in the northern margin of Gangdese and comparison with typical porphyry molybdenum deposits in the world. Geology and Exploration 47(1), 54-70.

External Links

Mineral and/or Locality is an outreach project of the Hudson Institute of Mineralogy, a 501(c)(3) not-for-profit organization.
Copyright © and the Hudson Institute of Mineralogy 1993-2017, except where stated. relies on the contributions of thousands of members and supporters.
Privacy Policy - Terms & Conditions - Contact Us Current server date and time: January 23, 2017 00:32:07 Page generated: May 13, 2016 07:34:58
Go to top of page