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R and R prospect, Tyndall District, Santa Rita Mts, Santa Cruz Co., Arizona, USA

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Latitude & Longitude (WGS84): 31° 40' 19'' North , 110° 53' 25'' West
Latitude & Longitude (decimal): 31.6719444444, -110.890277778
Other regions containing this locality:Sonoran Desert, North America


Ref.: Arizona Department of Mineral Resources R and R Mine file.

MRDS database Dep. ID file #10113432, MAS ID #0040230338.

A Pb-Zn-Cu-Ag occurrence/prospect located in the SE¼SE¼ sec. 22, T20S, R14E, on National Forest land. Tijuana Mines Inc. had unspecified involvement here.

Mineral List


3 valid minerals.

Regional Geology

This information on rock units at or nearby to the coordinates given for this locality is based on relatively small scale geological maps provided by various national Geological Surveys. This data will improve over time as more accurate maps and data sets are added.

Tertiary - Cretaceous2.588 - 145 MaCretaceous-Tertiary plutonic: undivided granitic rocks

Plutonic: undivided granitic rocks

Paleocene - Late Cretaceous56 - 100.5 MaEarly Tertiary to Late Cretaceous granitic rocks

Major:: {granodiorite},Minor:: {granite},Incidental:: {diorite, porphyry, quartz diorite, aplite, gabbro, pegmatite, skarn}

Porphyritic to equigranular granite to diorite emplaced during the Laramide orogeny. Larger plutons are characteristically medium-grained, biotite +/- hornblende granodiorite to granite. Smaller, shallow-level intrusions are typically porphyritic. Most of the large copper deposits in Arizona are associated with porphyritic granitic rocks of this unit, and are thus named 'porphyry copper deposits'. (50-82 Ma)

Laramide metaluminous; associated with porphyry Cu deposits

Cretaceous66 - 145 MaCretaceous plutonic rocks

Plutonic rocks

Deep-seated to high-level intrusions are included. Many charnockites, anorthosites, and large ophiolites, classified as plutons, are distinguished in the database using the SIGNIF item. Ophiolites were classified as plutons, even where remnants may be extrusive and/or sedimentary.


References for regional geology:

Data provided by Macrostrat.org

Garrity, C.P., and Soller, D.R.,. Database of the Geologic Map of North America: adapted from the map by J.C. Reed, Jr. and others (2005). U.S. Geological Survey Data Series 424 .

USGS compilers. State geologic map data. State Maps.

Geological Survey of Canada. Generalized geological map of the world and linked databases. doi:10.4095/195142. Open File 2915d.



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