| Abstract: | The gray, dark gray and black colors of the sediments and the presence of pyrite in the Carlin, Jerritt Canyon, Horse Canyon, Betze, and Gold Acres sediment-hosted disseminated gold (SHDG) deposits indicate that these rocks are not oxidized with respect to carbon and iron sulfide. The organic matter in the host rocks of SHDG deposits in north-central Nevada is cryptocrystalline graphite with dimensions of 30 to 70 A (0.003 to 0.007 ??) that was formed at temperatures of 250 to 300??C. These results indicate that north-central Nevada was subjected to pumpellyite-actinolite to lowermost greenschist facies conditions prior to mineralization. The hydrothermal fluids that produced the gold deposits had little, if any, effect on the thermal maturity and crystallinity of the cryptocrystalline graphite produced by the earlier thermal event. |
| Genre: | Conference Paper |
| ProdID: | 70015935 |
| Citation Author: | Leventhal, Joel; Hofstra, Albert |
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| Citation Editor: | Hausen Donald M.Halbe Douglas N.Petersen Erich U.Tafuri William J. |
| Citation End Page: | 368 |
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| Citation Language: | English |
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| Citation Number Of Pages: | 4 |
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| Citation Publisher: | Publ by Soc of Mining Engineers of AIME |
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| Citation Search Results Text: | Characterization of carbon in sediment-hosted disseminated gold deposits, north central Nevada; 1990; Conference Paper; Leventhal, Joel; Hofstra, Albert |
| Citation Start Page: | 365 |
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| Citation Year: | 1990 |
| Type: | citation/reference |
| Text: | Characterization of carbon in sediment-hosted disseminated gold deposits, north central Nevada; 1990; Conference Paper; Leventhal, Joel; Hofstra, Albert |
| URL (THUMBNAIL): | http://pubs.er.usgs.gov/thumbnails/outside_thumb.jpg |
| Date Other: | Mon, 1 Jan 1990 00:00 -0600 |
| Publisher: | Publ by Soc of Mining Engineers of AIME |
