| Abstract: | Cretaceous black shales from DSDP Leg 41, Site 368 in the Eastern Atlantic Ocean were thermally altered during the Miocene by an intrusive basalt. The sediments overlying and underlying the intrusive body were subjected to high temperatures (up to ~ 500??C) and, as a result, their kerogen was significantly altered. The extent of this alteration has been determined by examination by means of 13C nuclear magnetic resonance, using cross polarization/magic-angle spinning (CP/MAS). Results indicate that the kerogen becomes progressively more aromatic in the vicinity of the intrusive body. Laboratory heating experiments, simulating the thermal effects of the basaltic intrusion, produced similar results on unaltered shale from the drill core. The 13C CP/MAS results appear to provide a good measure of thermal alteration. ?? 1982. |
| Genre: | Article |
| ProdID: | 70011873 |
| Citation Author: | Dennis, L. W.; Maciel, G. E.; Hatcher, P. G.; Simoneit, B. R. T. |
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| Citation End Page: | 907 |
| Citation Issue: | 6 |
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| Citation Language: | English |
| Citation Larger Work Title: | Geochimica et Cosmochimica Acta |
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| Citation Number Of Pages: | 7 |
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| Citation Search Results Text: | 13C Nuclear magnetic resonance studies of kerogen from Cretaceous black shales thermally altered by basaltic intrusions and laboratory simulations; 1982; Article; Journal; Geochimica et Cosmochimica Acta; Dennis, L. W.; Maciel, G. E.; Hatcher, P. G.; Simoneit, B. R. T. |
| Citation Start Page: | 901 |
| Citation Volume: | 46 |
| Citation Year: | 1982 |
| Type: | citation/reference |
| Text: | 13C Nuclear magnetic resonance studies of kerogen from Cretaceous black shales thermally altered by basaltic intrusions and laboratory simulations; 1982; Article; Journal; Geochimica et Cosmochimica Acta; Dennis, L. W.; Maciel, G. E.; Hatcher, P. G.; Simoneit, B. R. T. |
| URL (THUMBNAIL): | http://pubs.er.usgs.gov/thumbnails/outside_thumb.jpg |
| Date Other: | Fri, 1 Jan 1982 00:00 -0600 |
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