There is a very good statistical treatment of alteration geochemistry
involving Gresens's equation in a paper by Ague and van Haren (1996,
Econ. Geol., v. 91, p.1169-1182). It is an improvement on Grant's
method, and appears to eliminate the need for specific gravity
measurements.
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David A. Love
Dept. of Geological Sciences & Geological Engineering
36 Union Street
Queen's University (Miller Hall Room 308)
Kingston, Ontario K7L 3N6 CANADA
Tel: (613) 533-6000 ext. 75854 - My Office
or (613) 533-2597 - Departmental Office FAX: (613) 533-6592
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Geo-mineralisation is administered by the Mineral Deposits Studies Group (UK)
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