Arizona Gypsum Mine (National Gypsum Co. Mine), Pinal County, Arizona, USAi
| Regional Level Types | |
|---|---|
| Arizona Gypsum Mine (National Gypsum Co. Mine) | Mine |
| Pinal County | County |
| Arizona | State |
| USA | Country |
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Latitude & Longitude (WGS84):
32° 52' 28'' North , 110° 40' 23'' West
Latitude & Longitude (decimal):
Locality type:
Köppen climate type:
Nearest Settlements:
| Place | Population | Distance |
|---|---|---|
| Dudleyville | 959 (2011) | 14.5km |
| Winkelman | 346 (2017) | 15.5km |
| Mammoth | 1,487 (2017) | 17.2km |
| Hayden | 650 (2017) | 17.9km |
| Kearny | 2,038 (2017) | 30.0km |
A former surface gypsum mine located in secs. 25 & 34-36, T6S, R16E, on the east side of San Pedro Valley, about 4½ miles NE of Lookout Mountain, about 4¾ miles just S of W of Brandenburg Mountain, and about 7½ miles S of Winkelman. Operated by the National Gypsum Co.
Mineralization is a lacustrine gypsum deposit hosted in the Gila Group (silt, shale) in a 2.44 meter thick bed. Ore is the bedded gypsum.
Assay data: Massive, white to grayish white, granular to microcrystalline gypsum beds; 90+% gypsum.
This deposit may be extensive in area. It is exposed near the surface where mined, but buried to the S and E and eroded away to the W and N, except in isolated resual hills. In this area, a zone at least 100 feet thick contains thick (1-8 feet), massive, wjite to grayish white, granular to microcrystalline, flat-lying gypsum beds. The gypsum beds are separated by thin layers of calcareous and gypsiferous shale and silt. Ground raw gypsum was sold to the Arizona Portland Cement Co. at Rillito, Pima County, and also sold for agriculture. Reserves and resources not estimated but probably in the multimillion-ton range.
Select Mineral List Type
Standard Detailed Gallery Strunz Chemical ElementsCommodity List
This is a list of exploitable or exploited mineral commodities recorded at this locality.Mineral List
1 valid mineral.
Detailed Mineral List:
| ⓘ Gypsum Formula: CaSO4 · 2H2O Reference: MRDS database Dep. ID #10105104 MRDS ID #TC10143. |
Gallery:
List of minerals arranged by Strunz 10th Edition classification
| Group 7 - Sulphates, Chromates, Molybdates and Tungstates | |||
|---|---|---|---|
| ⓘ | Gypsum | 7.CD.40 | CaSO4 · 2H2O |
List of minerals for each chemical element
| H | Hydrogen | |
|---|---|---|
| H | ⓘ Gypsum | CaSO4 · 2H2O |
| O | Oxygen | |
| O | ⓘ Gypsum | CaSO4 · 2H2O |
| S | Sulfur | |
| S | ⓘ Gypsum | CaSO4 · 2H2O |
| Ca | Calcium | |
| Ca | ⓘ Gypsum | CaSO4 · 2H2O |
References
Sort by
Year (asc) Year (desc) Author (A-Z) Author (Z-A)Blake, W.P. (1904) Gypsum Deposits of Arizona USGS Bull. 223, 129 pp.
Stone, R.W. (1920) Gypsum Deposits of the United States, USGS Bull. 697, 326 pp.
Phillips, K.A. (1987), Arizona Industrial Minerals, 2nd. Edition, Arizona Department of Mines & Minerals Mineral Report 4, 185 pp.
Peirce, H. Wesley (1990), Arizona Geological Survey Industrial Minerals card file.
USGS, Arizona Bureau of Mines, and US Bureau of Reclamation 1969, Mineral and water resources of Arizona, AZ Bur. of Mines Bull. 180: 375.
MRDS database Dep. ID #10105104 MRDS ID #TC10143.
Other Databases
| Link to USGS MRDS: | 10105104 |
|---|
Other Regions, Features and Areas containing this locality
North America
- Sonoran DesertDesert
- San Pedro river valleyValley
North America PlateTectonic Plate
- Basin and Range BasinsBasin
- Mazatzal DomainDomain
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