Novel 1H-Pyrrole-2,5-dione (maleimide) proxies for the assessment of photic zone euxinia
1H-Pyrrole-2,5-diones (maleimides) and 1-alkyl-2,3,6-trimethylbenzenes (aryl isoprenoids), degradation products of tetrapyrrole pigments and carotenoids respectively, were analysed and compared with pristane/phytane (Pr/Ph) ratios to reconstruct past redox conditions in three geologic sections. One...
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| Format: | Journal Article |
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Elsevier Science BV
2015
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| Online Access: | http://purl.org/au-research/grants/arc/DP130100577 http://hdl.handle.net/20.500.11937/24201 |
| _version_ | 1848751363548250112 |
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| author | Naeher, Sebastian Grice, Kliti |
| author_facet | Naeher, Sebastian Grice, Kliti |
| author_sort | Naeher, Sebastian |
| building | Curtin Institutional Repository |
| collection | Online Access |
| description | 1H-Pyrrole-2,5-diones (maleimides) and 1-alkyl-2,3,6-trimethylbenzenes (aryl isoprenoids), degradation products of tetrapyrrole pigments and carotenoids respectively, were analysed and compared with pristane/phytane (Pr/Ph) ratios to reconstruct past redox conditions in three geologic sections. One section comes from the Middle–Late Devonian and was deposited before the Frasnian–Famennian boundary mass extinction. The two other sections span the Late Permian to the Early Triassic as well as the Late Triassic to the Early Jurassic, and recorded the Permian–Triassic (P/T) and Triassic–Jurassic (T/J) extinction events respectively. The 2-methyl-3-isobutyl-maleimide (Me,i-Bu maleimide) to 2-methyl-3-ethyl-maleimide (Me,Et maleimide) and 2-methyl-3-npropyl- maleimide (Me,n-Pr maleimide) to Me,Et maleimide ratios (Me,i-Bu/Me,Et and Me,n-Pr/Me,Et ratios) in the studied sections revealed amoderate to strong negative correlation to the aryl isoprenoid ratio (AIR), defined as (C13–C17 1-alkyl-2,3,6-trimethylbenzenes)/(C18–C22 1-alkyl-2,3,6-trimethylbenzenes), indicating that these maleimide ratios can be used as robust, specific indicators of photic zone euxinia (PZE). These results agreed with Pr/Ph ratios, which were used as diagnostic indicators to differentiate between oxic and anoxic conditions. In agreement with previous studies, the novel maleimide proxies suggest that all three mass extinctions werelargely characterised by PZE depositional conditions. |
| first_indexed | 2025-11-14T07:51:32Z |
| format | Journal Article |
| id | curtin-20.500.11937-24201 |
| institution | Curtin University Malaysia |
| institution_category | Local University |
| last_indexed | 2025-11-14T07:51:32Z |
| publishDate | 2015 |
| publisher | Elsevier Science BV |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | curtin-20.500.11937-242012022-10-06T04:56:59Z Novel 1H-Pyrrole-2,5-dione (maleimide) proxies for the assessment of photic zone euxinia Naeher, Sebastian Grice, Kliti 1H-Pyrrole-2,5-diones (maleimides) and 1-alkyl-2,3,6-trimethylbenzenes (aryl isoprenoids), degradation products of tetrapyrrole pigments and carotenoids respectively, were analysed and compared with pristane/phytane (Pr/Ph) ratios to reconstruct past redox conditions in three geologic sections. One section comes from the Middle–Late Devonian and was deposited before the Frasnian–Famennian boundary mass extinction. The two other sections span the Late Permian to the Early Triassic as well as the Late Triassic to the Early Jurassic, and recorded the Permian–Triassic (P/T) and Triassic–Jurassic (T/J) extinction events respectively. The 2-methyl-3-isobutyl-maleimide (Me,i-Bu maleimide) to 2-methyl-3-ethyl-maleimide (Me,Et maleimide) and 2-methyl-3-npropyl- maleimide (Me,n-Pr maleimide) to Me,Et maleimide ratios (Me,i-Bu/Me,Et and Me,n-Pr/Me,Et ratios) in the studied sections revealed amoderate to strong negative correlation to the aryl isoprenoid ratio (AIR), defined as (C13–C17 1-alkyl-2,3,6-trimethylbenzenes)/(C18–C22 1-alkyl-2,3,6-trimethylbenzenes), indicating that these maleimide ratios can be used as robust, specific indicators of photic zone euxinia (PZE). These results agreed with Pr/Ph ratios, which were used as diagnostic indicators to differentiate between oxic and anoxic conditions. In agreement with previous studies, the novel maleimide proxies suggest that all three mass extinctions werelargely characterised by PZE depositional conditions. 2015 Journal Article http://hdl.handle.net/20.500.11937/24201 10.1016/j.chemgeo.2015.03.020 http://purl.org/au-research/grants/arc/DP130100577 Elsevier Science BV fulltext |
| spellingShingle | Naeher, Sebastian Grice, Kliti Novel 1H-Pyrrole-2,5-dione (maleimide) proxies for the assessment of photic zone euxinia |
| title | Novel 1H-Pyrrole-2,5-dione (maleimide) proxies for the assessment of photic zone euxinia |
| title_full | Novel 1H-Pyrrole-2,5-dione (maleimide) proxies for the assessment of photic zone euxinia |
| title_fullStr | Novel 1H-Pyrrole-2,5-dione (maleimide) proxies for the assessment of photic zone euxinia |
| title_full_unstemmed | Novel 1H-Pyrrole-2,5-dione (maleimide) proxies for the assessment of photic zone euxinia |
| title_short | Novel 1H-Pyrrole-2,5-dione (maleimide) proxies for the assessment of photic zone euxinia |
| title_sort | novel 1h-pyrrole-2,5-dione (maleimide) proxies for the assessment of photic zone euxinia |
| url | http://purl.org/au-research/grants/arc/DP130100577 http://hdl.handle.net/20.500.11937/24201 |