A fluorspar mine operated by the Rosiclare Lead and Spar Company on the Daisy vein. The vein was rarely wider than 8 feet, but occasionally reached 20 feet wide (Bastin, 1931).
In 1926 the mine shaft was over 400 feet deep, with drifts at the 180, 300 and 412-foot levels. A winze led to a drift near the 500-foot level. Before the mine was closed in 1941, an 800-foot level was worked, a result of lateral diamond drilling from the Rosiclare mine (Weller, et al, 1952).
The southern part of the vein was mined out from the adjacent Blue Diggings vein. The largest ore shoots were 2,000 feet long, 250 feet high, and averaged 3 feet in width (Grogan & Bradbury, 1967).
The west (hanging) wall of the Daisy vein showed evidence of fault movement post-dating the deposition of fluorite. Fractures due to faulting were found to traverse and brecciate the fluorite and calcite in some places (Bastin, 1931). Slickendsides indicate movement occurred at different times. In addition, evidence of wall rock replacement has been found. [This was from: A. Goldstein, Mineralogical Record, v. 27, no. 1, 1997, p. 8.]
Ref:
Bastin, E.S. (1931) The fluorspar deposits of Hardin and Pope Counties, Illinois. I.S.G.S. Bulletin 58, 116p.
Grogan, R.M. and Bradbury, J.C. (1967) Origin of stratiform fluorite deposits in southern Illinois. Economic Geology, Monograph 3, 40 - 50.
Weller J.M., Grogan R.M. and Tippie, F.E. (1952) Geology of the fluorspar deposits of Illinois, I.S.G.S. Bulletin 76, 147p.
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