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Imerys Marble Quarry (Santa Rita Quarry; Santa Rita Limestone; Calcium Products of Arizona Quarry; Pfizer Specialty Minerals Marble Quarry; Specialty Minerals Inc.; Sabado No. 1 - O.S. 1 & 2 - Butch 1-3 & 5), Helvetia-Rosemont District, Santa Rita Mts, Pima Co., Arizona, USA

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Latitude & Longitude (WGS84): 31° 52' 55'' North , 110° 46' 32'' West
Latitude & Longitude (decimal): 31.88194,-110.77556
Other regions containing this locality:Sonoran Desert, North America

A marble-limestone/dimension stone quarry (and apparent W prospect) located in the SE¼ sec. 11 & the NE¼ sec. 14, T18S, R15E, 15 miles SE of Sahuarita at the end of the Santa Rita Road. Operated 1972-1975, 1987, approximately 1995 - ?. Operated by Imerys Marble Inc., which is part of Imerys S.A., Paris, France, 1995(?) - ? (WW Besse, 2014). Operated by the Specialty Minerals Inc. (A Subsidiary Of Minerals Technologies Inc. Of Pfizer Minerals). Former operators include the Homestake Production Co. (1972-1975); and, Calcium Products of Arizona.. Owned by the Santa Rita Mining Co. Limestone Division

Mineralization is a contact metamorphism deposit of marmolized Paleozoic Escabrosa Limestone altered to marble. This is an extensive marble deposit of white marble. Marblized limestone is gently dipping, faulted and fractured, and 300 to 500 feet thick. There are zones in the marble that contain disseminated pyrite and other sulfides.

Workings include a quarry operation. Produces limestone for a lime plant.

The deposit was mined by the Homestake Production Co. for quicklime for copper flotation circuits from 1972-1975. In 1987, production was resumed by Calcium Products of Arizona. The product was ground calcium products. Drilling was done by Paul Lime Co. in 1961 and later by Anaconda Co. (during Cu exploration). Pfizer purchased the mine in 1991 and planned a $3 million exploration and development program.

Quarried for lime products. Crushing, sizing and bagging plant. Markets in Arizona and southwestern U.S.

Mineral List

2 valid minerals.

Regional Geology

This geological map and associated 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 does not necessarily represent the complete geology at this locality but it gives a background for the region in which it is found.

Click on geological units on the map for more information. Click here to view full-screen map on

Olenekian - Ediacaran
247.2 - 635 Ma
Paleozoic sedimentary rocks

Age: Neoproterozoic to Triassic (247.2 - 635 Ma)

Description: Undivided Paleozoic limestone, dolostone, quartzite, shale, and related sedimentary rocks. (248-544 Ma)

Lithology: Major:{limestone,dolostone,quartzite}, Minor:{shale}

Reference: Horton, J.D., C.A. San Juan, and D.B. Stoeser. The State Geologic Map Compilation (SGMC) geodatabase of the conterminous United States. doi: 10.3133/ds1052. U.S. Geological Survey Data Series 1052. [133]

Data and map coding provided by, used under Creative Commons Attribution 4.0 License

This page 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.


Arizona Department of Mineral Resources (1955) file data.

Keith, Stanton B. (1974), Arizona Bureau of Geology & Mineral Technology, Geological Survey Branch Bull. 189, Index of Mining Properties in Pima County, Arizona: 128 (Table 4).

Niemuth, N.J. (1987), Arizona Mineral Development 1984-1986, Arizona Department of Mines & Mineral Resources Directory 29, 46 pp.

Phillips, K.A. (1987), Arizona Industrial Minerals, 2nd. Edition, Arizona Department of Mines & Minerals Mineral Report 4, 185 pp.

Arizona Department of Mines & Mineral Resources (1988), Directory of Active Mines in Arizona, incorporating sand and gravel operations, Arizona Department of Mines & Mineral Resources Directory, 13 p.

Peirce, H. Wesley (1990), Arizona Geological Survey Industrial Minerals card file.

Phillips, K.A., Beard, R.R., Niemuth, N.J., and Bain, D.R. (1991) Active Mines in Arizona – 1992: Arizona Department of Mines and Mineral Resources Directory 39, 20 pp.

Eyde, T.H. and Eyde, D.T. (1992) Present and Past Producers of White Calcium Carbonate Products in Arizona. In: Houser, B.B., editor, Industrial Minerals of the Tucson Area and San Pedro Valley, Southeastern Arizona: Tucson, Arizona, Arizona Geological Society Field Trip, April 4-5, 1992, Guidebook: 37-47.

Houser, B.B. (1992) (editor) Industrial Minerals of the Tucson Area and San Pedro Valley, Southeastern Arizona: Tucson, Arizona. Arizona Geological Society Field Trip, April 4-5, 1992, Guidebook, 55 pp.: 37-47.

Phillips, K.A., Niemuth, N.J., and Bain, D.R. (1992) Active Mines in Arizona – 1993: Arizona Department of Mines and Mineral Resources Directory 40, 25 pp.

Staff, Resource Evaluation Branch, U.S. Bureau of Mines (1994) Mineral Appraisal of the Coronado National Forest, part 12, Santa Rita Mountains Unit, Pima and Santa Cruz Counties, Arizona: U.S. Bureau of Mines Open-File Report, Mineral Land Assessment (MLA) 11-94, 213p.

Arizona Bureau of Mines file data.

MRDS database Dep. ID file #10060228, MRDS ID #TC10195; and, Dep. ID #10235086, MAS ID #0040190385; and, Dep. ID #10283242, MAS ID #0040190653.

USGS Sahuarita Quadrangle topo map.

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