Ref.: Gordon, Samuel G. (1922), Mineralogy of Pennsylvania: 135-136.
Mineralogical Record: 20(5): 369-384.
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.
This workings represents 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 inapropriately attributed to the more famous Wheatley mine. As such, most "Wheatley" specimens should be considered "district" specimens, unless otherwise noted as "definitively" eminating 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 N 40*06'15" W 75*31'16"
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Map Reference: 40°8'N , 75°31'W
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