A potential biomarker for the Permian-Triassic ecological crisis
A unique biomarker, a C33 n-alkylcyclohexane (n-heptacosylcyclohexane), which strongly increases in abundance within the extinction interval of the end-Permian ecological crisis, is here reported from the key Permian–Triassic (P–Tr) marine section in Greenland. Prior to this study, this compound had...
| Main Authors: | , , , , |
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| Format: | Journal Article |
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Elsevier BV
2005
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| Online Access: | http://hdl.handle.net/20.500.11937/25648 |
| _version_ | 1848751767110549504 |
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| author | Grice, Kliti Twitchett, R. Alexander, Robert Foster, C. Looy, Cindy |
| author_facet | Grice, Kliti Twitchett, R. Alexander, Robert Foster, C. Looy, Cindy |
| author_sort | Grice, Kliti |
| building | Curtin Institutional Repository |
| collection | Online Access |
| description | A unique biomarker, a C33 n-alkylcyclohexane (n-heptacosylcyclohexane), which strongly increases in abundance within the extinction interval of the end-Permian ecological crisis, is here reported from the key Permian–Triassic (P–Tr) marine section in Greenland. Prior to this study, this compound had been known from Early Triassic organic-rich marine rocks and oils from the northern Perth Basin, Western Australia for two decades. We have identified the compound in high relative abundance in 29 samples from P–Tr marine sections from two separate paleogeographic localities, from Laurasia and Gondwana. Relative concentrations of the C33 n-alkylcyclohexane show similar changes to the relative abundances of extinct spinose acritarchs (Veryhachium and Micrhystridium) indicating that the source organism of the C33 n-alkylcyclohexane is associated with the depositional environments/facies in which the acritarchs are identified. These organisms probably formed the cornerstone of the unique marine ecosystem that thrived in the extinction aftermath in the Early Triassic Ocean. |
| first_indexed | 2025-11-14T07:57:57Z |
| format | Journal Article |
| id | curtin-20.500.11937-25648 |
| institution | Curtin University Malaysia |
| institution_category | Local University |
| last_indexed | 2025-11-14T07:57:57Z |
| publishDate | 2005 |
| publisher | Elsevier BV |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | curtin-20.500.11937-256482017-09-13T15:51:05Z A potential biomarker for the Permian-Triassic ecological crisis Grice, Kliti Twitchett, R. Alexander, Robert Foster, C. Looy, Cindy Triassic extinction Permian biomarkers A unique biomarker, a C33 n-alkylcyclohexane (n-heptacosylcyclohexane), which strongly increases in abundance within the extinction interval of the end-Permian ecological crisis, is here reported from the key Permian–Triassic (P–Tr) marine section in Greenland. Prior to this study, this compound had been known from Early Triassic organic-rich marine rocks and oils from the northern Perth Basin, Western Australia for two decades. We have identified the compound in high relative abundance in 29 samples from P–Tr marine sections from two separate paleogeographic localities, from Laurasia and Gondwana. Relative concentrations of the C33 n-alkylcyclohexane show similar changes to the relative abundances of extinct spinose acritarchs (Veryhachium and Micrhystridium) indicating that the source organism of the C33 n-alkylcyclohexane is associated with the depositional environments/facies in which the acritarchs are identified. These organisms probably formed the cornerstone of the unique marine ecosystem that thrived in the extinction aftermath in the Early Triassic Ocean. 2005 Journal Article http://hdl.handle.net/20.500.11937/25648 10.1016/j.epsl.2005.05.008 Elsevier BV restricted |
| spellingShingle | Triassic extinction Permian biomarkers Grice, Kliti Twitchett, R. Alexander, Robert Foster, C. Looy, Cindy A potential biomarker for the Permian-Triassic ecological crisis |
| title | A potential biomarker for the Permian-Triassic ecological crisis |
| title_full | A potential biomarker for the Permian-Triassic ecological crisis |
| title_fullStr | A potential biomarker for the Permian-Triassic ecological crisis |
| title_full_unstemmed | A potential biomarker for the Permian-Triassic ecological crisis |
| title_short | A potential biomarker for the Permian-Triassic ecological crisis |
| title_sort | potential biomarker for the permian-triassic ecological crisis |
| topic | Triassic extinction Permian biomarkers |
| url | http://hdl.handle.net/20.500.11937/25648 |