Edited by G.J. Orris and J.D. Bliss

Version 1.0



This publication presents a series of 23 grade and tonnage and other deposit-specific models for industrial minerals. The models are presented in the format and classification system used in Cox and Singer (1986) and modified by Orris and Bliss (1991).

Originally published in 1992, this report is presented here in Portable Document Format.
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For more information about this report, contact William D. Heran at wheran@usgs.gov

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U.S. Department of the Interior | U.S. Geological Survey URL: <http://pubs.usgs.gov/of/1992/ofr-92-0437/> Questions or Assistance: Contact USGS Page Last Modified: Tue Dec 13 19:20 EST 2005