An extended organic carbon-isotope record across the Triassic–Jurassic boundary in the Queen Charlotte Islands, British Columbia, Canada
New lithologic and organic carbon-isotope data are presented for the Triassic–Jurassic boundary section at Kennecott Point, Queen Charlotte Islands, British Columbia, Canada. The previously reported Late Norian to earliest Hettangian record is extended by over 130 m, and three new isotopic features...
| Main Authors: | , , , |
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| Format: | Journal Article |
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Elsevier Science BV
2007
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| Subjects: | |
| Online Access: | www.elsevier.com/locate/palaeo http://hdl.handle.net/20.500.11937/16751 |
| _version_ | 1848749265883496448 |
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| author | Williford, Kenneth Ward, P. Garrison, G. Buick, R. |
| author_facet | Williford, Kenneth Ward, P. Garrison, G. Buick, R. |
| author_sort | Williford, Kenneth |
| building | Curtin Institutional Repository |
| collection | Online Access |
| description | New lithologic and organic carbon-isotope data are presented for the Triassic–Jurassic boundary section at Kennecott Point, Queen Charlotte Islands, British Columbia, Canada. The previously reported Late Norian to earliest Hettangian record is extended by over 130 m, and three new isotopic features are revealed. The record now shows a negative offset in baseline carbon isotope values from approximately -29‰ in the Late Norian to -31‰ in the Hettangian. This offset is accompanied by the previously reported 2‰ negative excursion at the Triassic–Jurassic boundary and a 5‰ positive excursion in the early Hettangian. There is a significant long-term negative isotopic trend in the Hettangian interval of the section, which may be due to CAMP volcanism. The positive excursion is attributed to a decline in bio-calcification as well as changes in microbial ecology, both related to the mass extinction at the Triassic–Jurassic boundary. |
| first_indexed | 2025-11-14T07:18:12Z |
| format | Journal Article |
| id | curtin-20.500.11937-16751 |
| institution | Curtin University Malaysia |
| institution_category | Local University |
| last_indexed | 2025-11-14T07:18:12Z |
| publishDate | 2007 |
| publisher | Elsevier Science BV |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | curtin-20.500.11937-167512017-09-13T15:43:55Z An extended organic carbon-isotope record across the Triassic–Jurassic boundary in the Queen Charlotte Islands, British Columbia, Canada Williford, Kenneth Ward, P. Garrison, G. Buick, R. Extinction Jurassic Triassic Organic Carbon isotope New lithologic and organic carbon-isotope data are presented for the Triassic–Jurassic boundary section at Kennecott Point, Queen Charlotte Islands, British Columbia, Canada. The previously reported Late Norian to earliest Hettangian record is extended by over 130 m, and three new isotopic features are revealed. The record now shows a negative offset in baseline carbon isotope values from approximately -29‰ in the Late Norian to -31‰ in the Hettangian. This offset is accompanied by the previously reported 2‰ negative excursion at the Triassic–Jurassic boundary and a 5‰ positive excursion in the early Hettangian. There is a significant long-term negative isotopic trend in the Hettangian interval of the section, which may be due to CAMP volcanism. The positive excursion is attributed to a decline in bio-calcification as well as changes in microbial ecology, both related to the mass extinction at the Triassic–Jurassic boundary. 2007 Journal Article http://hdl.handle.net/20.500.11937/16751 10.1016/j.palaeo.2006.06.032 www.elsevier.com/locate/palaeo Elsevier Science BV restricted |
| spellingShingle | Extinction Jurassic Triassic Organic Carbon isotope Williford, Kenneth Ward, P. Garrison, G. Buick, R. An extended organic carbon-isotope record across the Triassic–Jurassic boundary in the Queen Charlotte Islands, British Columbia, Canada |
| title | An extended organic carbon-isotope record across the Triassic–Jurassic boundary in the Queen Charlotte Islands, British Columbia, Canada |
| title_full | An extended organic carbon-isotope record across the Triassic–Jurassic boundary in the Queen Charlotte Islands, British Columbia, Canada |
| title_fullStr | An extended organic carbon-isotope record across the Triassic–Jurassic boundary in the Queen Charlotte Islands, British Columbia, Canada |
| title_full_unstemmed | An extended organic carbon-isotope record across the Triassic–Jurassic boundary in the Queen Charlotte Islands, British Columbia, Canada |
| title_short | An extended organic carbon-isotope record across the Triassic–Jurassic boundary in the Queen Charlotte Islands, British Columbia, Canada |
| title_sort | extended organic carbon-isotope record across the triassic–jurassic boundary in the queen charlotte islands, british columbia, canada |
| topic | Extinction Jurassic Triassic Organic Carbon isotope |
| url | www.elsevier.com/locate/palaeo http://hdl.handle.net/20.500.11937/16751 |