Wheatley Mines, Phoenixville Mining District, Schuylkill Township, Chester Co., Pennsylvania, USA
|Latitude & Longitude (WGS84):||40° 6' 20'' North , 75° 30' 60'' West|
|Latitude & Longitude (decimal):||40.10556,-75.51667|
|Köppen climate type:||Cfa : Humid subtropical climate|
This workings represent the consolidation of several earlier workings on the same deposit (Wheatley lode). It was a lead-silver mine. The mine was started in 1851 and closed in the 1860's. It was reopened in 1917 and closed in 1920. The larger enterprise was owned by Mr. Charles Moore Wheatley. Subsequently, when reopened, it was owned by Eastern Mining & Milling Co. The mine consisted of 5 levels with 2,108 meters of horizontal workings, 6 shafts (main engine shaft = 91 meters deep). Rock is adamellite, a granitic intrusive rock of Precambrian age (Mineralization, Triassic period or earlier). Mines include the Wheatley, Brookdale and Phoenix mines.
Note: sadly, many mineral specimens collected from this district, and especially those collected in the 19th century during the mines operation, have locality attributions listed as simply "Phoenixville". Although the Wheatley mine was the most prolific of these mines, and likely produced the majority of specimens now in collections (Charles Wheatley himself was an great mineral enthusiast, with a cabinet of over 6000 specimens from his mines), other mine sites, especially the Chester County Mine, were also quite prolific, and many specimens labled without specific mine site attibutions have since been inappropriately attributed to the more famous Wheatley mine. As such, most "Wheatley" specimens should be considered "district" specimens, unless otherwise noted as "definitively" emanating from the either the Wheatley mine or it's old dump site.
Coordinates given are for the sight of the Brookdale mine and dumps. Other mine coordinates are as follows:
South West Chester Mine: 40°06'15"N, 75°31'16"W.
33 valid minerals. 1 (TL) - type locality of valid minerals.
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 Macrostrat.org
541 - 4000 Ma
|Felsic and intermediate gneiss|
Age: Precambrian (541 - 4000 Ma)
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. 
Palache, C., Berman, H., & Frondel, C. (1951), The System of Mineralogy of James Dwight Dana and Edward Salisbury Dana, Yale University 1837-1892, Volume II: 800, 893, 1085.
Montgomery, Arthur (Jan, 1963), "Gordon's Pennsylvania Mineral List," in Pennsylvania Minerals (PM), PM (3), Keystone Newsletter.
Lapham, Davis M. and Geyer, Alan R. (1965), Mineral Collecting in Pennsylvania: 66. (1969): 68.
Reed, Juliet C. (1976), Annotated Bibliography of Minerals New to the Pennsylvania List 1965-1974, The Mineralogical Society of Pennsylvania, Inc.: 66-67.
Acta Crystallographica: B36 (1980): 2145.
Rouse, et al (1986).
American Mineralogist (1986): 71: 1240.
Mineralogical Record (1989): 20(5): 369-384.