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 Articles
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 CompaniesStatisticsThe ElementsUsersBooks & MagazinesMineral MuseumsMineral Shows & EventsThe Mindat DirectoryDevice Settings
Photo SearchPhoto GalleriesNew Photos TodayNew Photos YesterdayMembers' Photo GalleriesPast Photo of the Day Gallery

Arivaca District (Las Guijas District), Las Guijas & San Luis Mts, Pima Co., Arizona, USA

This page is currently not sponsored. Click here to sponsor this page.
Lock Map
Location is approximate, estimate based on other nearby localities.
Latitude & Longitude (WGS84): 31° North , 111° West (est.)
Margin of Error:~18km
Other regions containing this locality:Sonoran Desert, North America
Locality type:District
Köppen climate type:BSk : Cold semi-arid (steppe) climate

‡Ref.: The Resources of Arizona - A Manual of Reliable Information Concerning the Territory, compiled by Patrick Hamilton (1881), Prescott, AZ: 45.

University of Arizona Bull. 41 (1916-17), Mineralogy of Useful Minerals in Arizona: 41.

Wilson, E.D. (1941), Tungsten Deposits of Arizona, Geological Series No. 14, Arizona Bureau of Mines Bull. 148: 37-39.

Dale, V.B., Stewart, L.A., and McKinney, W.A. (1960), Tungsten deposits of Cochise, Pima, and Santa Cruz Counties., Arizona, U.S. Bureau of Mines Report of Investigation 5650: 98-105.

Wilson, E.D. (1961) Gold Placers and Placering in Arizona. Arizona Bureau of Mines Bull. 168 (revised 1978): 78-80.

Arizona Bureau of Mines file data, circa 1973.

Keith, Stanton B. (1974), Arizona Bureau of Geology & Mineral Technology, Geological Survey Branch Bull. 189, Index of Mining Properties in Pima County, Arizona: 103 (Table 4).

Arizona Bureau of Mines file data.

A Au-Ag-Pb-W-Cu-Zn (Hg-F) mining area located in T.20-23S., R.9-10E., in the Las Guijas and San Luis Mountains.

Mineralization is varied: (1) Spotty base and precious metal mineralization in irregular quartz and quartz-calcite fissure veins cutting partly metamorphosed Cretaceous sandstone, shale, conglomerate, minor limestone, and volcanics. Oxidation and enrichment by surface weathering produced local, high-grade gold and silver pockets; (2) Irregular quartz-filled fissure veins with spotty tungsten and base metal sulfides in Laramide granitic intrusive; and, (3) Small scattered gold and tungsten placer deposits

Workings include over 100 small mines and prospects have been worked since Spanish Colonial times but no large, sustained operations. Estimated and recorded production would amount to some 9,300 tons of ore containing about 3,600 oz. Au, 45,500 oz. Ag, 115 tons of Pb, 36 tons of Cu, 9 tons of Zn, and 250 tons of tungsten concentrates.

Commodity List

This is a list of exploitable or exploited mineral commodities recorded from this region.

Mineral List

Mineral list contains entries from the region specified including sub-localities

24 valid minerals.

Localities in this Region
Show map


This page 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.
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 1993-2019, except where stated. Mindat.org relies on the contributions of thousands of members and supporters.
Privacy Policy - Terms & Conditions - Contact Us Current server date and time: March 23, 2019 08:52:17 Page generated: May 17, 2018 22:39:40
Go to top of page