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):||40.1055555556, -75.5166666667|
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.
|Triassic201.3 - 252.17 Ma||Triassic mixed volcanic, volcaniclastic and sedimentary rocks|
Mixed volcanic, volcaniclastic and sedimentary rocks
This designation includes Precambrian iron-formation-bearing sedimentary and volcanic sequences, as well as mixed sedimentary and volcanic or volcaniclastic sequences.
|Precambrian541 - 4000 Ma||Felsic and intermediate gneiss|
|Mesoproterozoic1000 - 1600 Ma||Mesoproterozoic metamorphic and undivided crystalline: orthogneiss|
Metamorphic and undivided crystalline: orthogneiss
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.
33 valid minerals. 1 (TL) - type locality of valid minerals.
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.