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

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Latitude & Longitude (WGS84): 31° 41' 34'' North , 110° 54' 37'' West
Latitude & Longitude (decimal): 31.6927777778, -110.910277778
Other regions containing this locality:Sonoran Desert, North America


‡Ref.: Schrader, F.C. & J.M. Hill (1915), Mineral deposits of the Santa Rita and Patagonia Mountains, Arizona, USGS Bull. 582: 184.

Arizona Bureau of Mines card file Santa Cruz County.

MRDS database Dep. ID file #10137522, MAS ID #0040230240.

A former underground Cu-Pb-Zn prospect located about ¼ mile south of Agua Caliente Canyon, at an elevation of 5,365 feet.

Mineralization involves an east-west shear fault ledge in diorite and is apparently paralleled by a dike of granite porphyry 20 feet to the north. The ledge ranges from 6 to 50 feet wide. It carries gouge and soft, crudely banded ore containing drusy quartz, sulphides and iron oxides.

Mineral List


6 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.



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.
 
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