| Abstract: | New Re-Os data for chalcopyrite, bornite, and pyrite from the carbonate-hosted Cu deposit at Ruby Creek (Bornite), Alaska, show extremely high Re abundances (hundreds of ppb, low ppm) and contain essentially no common Os. The Re-Os data provide the first absolute ages of ore formation for the carbonate-hosted Ruby Creek Cu-(Co) deposit and demonstrate that the Re-Os systematics of pyrite, chalcopyrite, and bornite are unaffected by greenschist metamorphism. The Re-Os data show that the main phase of Cu mineralization pre dominantly occurred at 384 ?? 4.2 Ma, with an earlier phase possibly at ???400 Ma. The Re-Os data are consistent with the observed paragenetic sequence and coincide with zircon U-Pb ages from igneous rocks within the Ambler metallogenic belt, some of which are spatially and genetically associated with regional volcanogenic massive sulfide deposits. The latter may suggest a temporal link between regional magmatism and hydrothermal mineralization in the Ambler district. The utility of bornite and chalcopyrite, in addition to pyrite, contributes to a new understanding of Re-Os geochronology and permits a refinement of the genetic model for the Ruby Creek deposit. ?? 2009 Society of Economices Geologists, Inc. |
| Genre: | Article |
| ProdID: | 70034769 |
| Citation Author: | Selby, D.; Kelley, K. D.; Hitzman, M. W.; Zieg, J. |
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| Citation End Page: | 444 |
| Citation Issue: | 3 |
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| Citation Language: | English |
| Citation Larger Work Title: | Economic Geology |
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| Citation Number Of Pages: | 8 |
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| Citation Search Results Text: | Scientific communications: Re-Os sulfide (bornite, chalcopyrite, and pyrite) systematics of the carbonate-hosted copper deposits at ruby creek, southern brooks range, Alaska; 2009; Article; Journal; Economic Geology; Selby, D.; Kelley, K. D.; Hitzman, M. W.; Zieg, J. |
| Citation Start Page: | 437 |
| Citation Volume: | 104 |
| Citation Year: | 2009 |
| Type: | citation/reference |
| Text: | Scientific communications: Re-Os sulfide (bornite, chalcopyrite, and pyrite) systematics of the carbonate-hosted copper deposits at ruby creek, southern brooks range, Alaska; 2009; Article; Journal; Economic Geology; Selby, D.; Kelley, K. D.; Hitzman, M. W.; Zieg, J. |
| URL (THUMBNAIL): | http://pubs.er.usgs.gov/thumbnails/outside_thumb.jpg |
| URL (DIGITAL OBJECT IDENTIFIER): | http://dx.doi.org/10.2113/gsecongeo.104.3.437 |
| Date Other: | Thu, 1 Jan 2009 00:00 -0600 |
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