1_README.TXT Geology, Geochemistry and Geophysics of Sedimentary Rock- Hosted Au Deposits in P.R. China edited by Stephen G. Peters(1) Open-File Report: 02-131 2002 U.S. Department of the Interior Gale A. Norton, Secretary U.S. Geological Survey Charles G. Groat, Director (1)U.S Geological Survey, c/o Mackay School of Mines, Reno, NV 89557-0047 QUICK START For those already familiar with Adobe Acrobat Reader and who have version 5.0 or greater of this program on their computer, go directly to the file OF02-131.pdf. CONTENTS This CD-ROM contains Portable Document Format (.pdf) files for the main text of the report (OF02-131.pdf) as well as individual folders of chapters, appendixes, images, data tables, and software. 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Once the CD-ROM is mounted, use Acrobat Reader to open the file OF02-131.pdf. PORTABLE DOCUMENT FORMAT (PDF) FILES Using Adobe Acrobat Reader, you can view, search, and print copies of the PDF documents in this report. The PDFs open with "bookmarks" displayed that allow you to choose among the sections of the text and the figures or other PDF documents. The "Acrobat" folder contains installers for Adobe Acrobat Reader 5.0 for both Windows ("PC" subfolder) and Macintosh ("Mac" subfolder). You can use the installers provided on this CD-ROM, or download the latest version of Adobe Acrobat Reader free via the World-Wide Web from the Adobe home page at http://www.adobe.com/products/acrobat/readstep.html. Within the text, there are hyperlinks (or "hot links") built into each entry of the Contents and into each mention of a figure, table, section, appendix, or footnote. Hyperlinks are apparent because, as you hover over them with the mouse, the cursor changes to a pointing finger. In some cases, the hyperlinked text has a blue box around it. As you read, you can use the hyperlinks by clicking on them with your mouse and you will be moved to that view. To get back to the previous view, use the "back" button on the menu bar at the top of the Acrobat screen or press Alt + left-arrow (Windows) or Command + left-arrow (Macintosh). World-Wide-Web URLs are also hyperlinks; clicking on them will launch your browser and you will be taken to that Web site. Tip: If your copy of Acrobat Reader 5 has "Open Cross- Document Links In Same Window" ("Edit" menu under "Preferences", "General...", "Options") selected, you should DESELECT it. This will keep the main document open while you open and close other PDF files. In older versions of Acrobat, this menu item is in "File" "Preferences" "General..." This CD-ROM contains a full-text index ("index.pdx" and associated files in the "index" folder) that is for use in searching the PDF file on this disc for words or sets of words, using the Search tool in Acrobat Reader. To make best use of this CD-ROM, you will need to develop some familiarity with Acrobat Reader; an on-line guide is available within Acrobat Reader under "Help." ABSTRACT 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://geopubs.wr.usgs.gov/open-file/of98-466/. Geochemical analysis of ore samples from the deposits visited are contained in Appendix IV. COVER AND LABEL Front Piece: Friendship tree in Huangshan, Anhui Province. The wind blown trees in the high granite mountains extend a hand of greeting and friendship to visitors. This tree is a national treasure. Disk label: Huanggoushu Waterfall in Dian-Qian-Gui area, Guizhou Province. The waterfall traverses karst terrain in limestone and falls into complex and dangerous glory holes at the bottom. FOR SALE BY: USGS Information Services Box 25286 Denver Federal Center Denver, CO 80225 Telephone: (888) ASK-USGS 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 02-131 (CD-ROM). ISBN 0-607-99058-9 This report and any updates to it are available on line at http://geopubs.wr.usgs.gov/open-file/of02-131/ DISCLAIMERS This Compact Disc Read-Only Memory (CD-ROM) publication was prepared by an agency of the U.S. Government. Neither the U.S. Government nor any agency thereof, nor any of their employees, makes any warranty, expressed or implied, or assumes any legal liability or responsibility for the accuracy, completeness, or usefulness of any information, apparatus, product, or process disclosed in this report, or represents that its use would not infringe on privately owned rights. 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