Open-File Report 02131
U.S. Department of the Interior
Gail A. Norton, Secretary
U.S. Geological Survey
Charles G. Groat, Director
This report is preliminary and has not been reviewed for conformity with U.S. Geological Survey (USGS) editorial standards or with the North American Stratigraphic Code. Any use of trade, firm, or product names is for descriptive purposes only and does not imply endorsement by the U.S. Government.
1U.S. Geological Survey, c/o Mackay School of Mines, Reno, NV 895570047.
|The Friendship Tree in Huangshan, Anhui Province. The windblown trees in the high granite mountains extend a hand of greeting and friendship to visitors. This tree is a national treasure.|
This is the second report concerning results of a joint project between the U.S. Geological Survey and the Tianjin Geological Academy to study sedimentary rock-hosted Au deposits in P.R. China. Since the 1980s, Chinese geologists have devoted a large-scale exploration and research effort to the deposits. As a result, there are more than 20 million oz of proven Au reserves in sedimentary rock-hosted Au deposits in P.R. China. Additional estimated and inferred resources are present in over 160 deposits and occurrences, which are undergoing exploration. This makes China second to Nevada in contained ounces of Au in Carlin-type deposits. It is likely that many of the Carlin-type Au ore districts in China, when fully developed, could have resource potential comparable to the multi-1,000-tonne Au resource in northern Nevada. The six chapters of this report describe sedimentary rock-hosted Au deposits that were visited during the project. Chapters 1 and 2 provide an overview of sedimentary rock-hosted Au deposits and Carlin-type Au deposits and also provide a working classification for the sedimentary rock-hosted Au deposits. Chapters 3, 4, and 5 provide descriptions that were compiled from the literature in China in three main areas: the Dian-Qian-Gui, the Qinling fold belt, and Middle-Lower Yangtze River areas. Chapter 6 contains a weights-of-evidence (WofE), GIS-based mineral assessment of sedimentary rock-hosted Au deposits in the Qinling fold belt and Dian-Qian-Gui areas. Appendices contain scanned aeromagnetic (Appendix I) and gravity (Appendix II) geophysical maps of south and central China. Data tables of the deposits (Appendix III) also are available in the first report as an interactive database at http://pubs.usgs.gov/of/1998/of98-466/. Geochemical analysis of ore samples from the deposits visited are contained in Appendix IV.
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Open-File Report 02131 - MAIN TEXT as an Adobe® Acrobat PDF file with hyperlinks to the chapters (24 pages, 1.3 MB).
-- Chapters - A folder containing six .pdf files, one for each of the six chapters in this report (338 pages, 105 MB). These are hyperlinked from the main text and are also available here as individual files.
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-- 1_README.TXT - Readme file from the CDROM version of this publication.
The bibliographical reference for this publication is:
Peter, Stephen G., ed., Geology, geochemistry and
geophysics of sedimentary rock-hosted Au deposits in
P.R. China: U.S. Geological Survey Open-File
Report 02131 (CDROM).
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Maintained by: Michael Diggles
Created: June 20, 2002
Last update: May 5, 2008
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