Gold in Minerals and the Composition of Native Gold - USGS
Gold in Minerals and the Composition of Native Gold
Gold in Minerals and the Composition of Native Gold
By Robert S. Jones and Michael Fleischer
GEOLOGICAL SURVEY CIRCULAR 612
Washington 1969
United States Department of the Interior
WAl.TfR J. HICKEL, Secretary
Geological Survey
William T. Pecora, Director
Free on application to the U.S. Geological Survey, Washington, D.C. 20242
CONTENTS
Page
Abstract -----------------------------------------------~----------------- 1
Introduction -------------------------------------------------------------- 1
General geochenrlcal considerations ----------------------------------------- 1
Gold in minerals ------------------------------------------------------ _
2
Composition and the fineness of gold ---------------------------- ___
13
References cited --------?------- _____________________ ______________ ____ _ 15
TABLES
Page
'fABLE 1. Major gold-bearing minerals ----------------------------------- __ 2 2. Analyses of precious metals in minerals made before 1955 _______ _ ._ 3
3. Analyses of gold in minerals made since 1954 --------------------- 10
4. Variation in fineness of gold with depth, Lily mine, Transvaal, South Jlfrica -------------------------------------------------------- 14
5. Fineness of mill bullion prior to 1882 at the Homestake nrlne, South Dakota -------------------------------------------------------- 15
Ill
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