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| Main Authors: | , |
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| Format: | Dataset Open Access |
| Language: | en |
| Published: |
PANGAEA
1985
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| Subjects: | |
| Online Access: | https://doi.org/10.1594/PANGAEA.802690 |
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| _version_ | 1867168134079709184 |
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| author | Simoneit, Bernd R T Beller, Harry R |
| author_facet | Simoneit, Bernd R T Beller, Harry R |
| collection | Datos científicos de ciencias marinas y ambientales |
| contents | Core samples of calcareous sediments taken from above and below the proposed Cretaceous/Tertiary boundary (Sample 577-12-5, 130 cm) were examined for geochemical evidence of the mass extinctions and faunal successions that marked this period. The lipid compositions of the six core samples examined were virtually identical and were characterized by a large component of unresolved naphthenic hydrocarbons and a homologous series of an/mo-alkanes, both presumably of bacterial origin. The results of this preliminary study suggest that the lipids of sediments deposited over a several million year period encompassing the Cretaceous-Tertiary extinctions have been almost completely recycled by bacterial metabolism, which occurred under oxic depositional and/or diagenetic conditions and which left a unique bacterial signature with only minor traces of the original sedimentary lipids. |
| format | Dataset Open Access |
| id | pangaea_https___doi_org_10_1594_PANGAEA_802690 |
| institution | PANGAEA |
| language | en |
| publishDate | 1985 |
| publisher | PANGAEA |
| record_format | pangaea |
| spellingShingle | (Table 1) Lipid yields for samples across the Cretaceous/Tertiary boundary in DSDP Hole 86-577 Simoneit, Bernd R T Beller, Harry R 86-577; Anteiso-alkanes, total; Deep Sea Drilling Project; DRILL; Drilling/drill rig; DSDP; DSDP/ODP/IODP sample designation; Epoch; Extract; Gas chromatography; Glomar Challenger; Leg86; Lithology/composition/facies; North Pacific Ocean; Sample code/label; Sample code/label 2; Visual description Core samples of calcareous sediments taken from above and below the proposed Cretaceous/Tertiary boundary (Sample 577-12-5, 130 cm) were examined for geochemical evidence of the mass extinctions and faunal successions that marked this period. The lipid compositions of the six core samples examined were virtually identical and were characterized by a large component of unresolved naphthenic hydrocarbons and a homologous series of an/mo-alkanes, both presumably of bacterial origin. The results of this preliminary study suggest that the lipids of sediments deposited over a several million year period encompassing the Cretaceous-Tertiary extinctions have been almost completely recycled by bacterial metabolism, which occurred under oxic depositional and/or diagenetic conditions and which left a unique bacterial signature with only minor traces of the original sedimentary lipids. |
| title | (Table 1) Lipid yields for samples across the Cretaceous/Tertiary boundary in DSDP Hole 86-577 |
| topic | 86-577; Anteiso-alkanes, total; Deep Sea Drilling Project; DRILL; Drilling/drill rig; DSDP; DSDP/ODP/IODP sample designation; Epoch; Extract; Gas chromatography; Glomar Challenger; Leg86; Lithology/composition/facies; North Pacific Ocean; Sample code/label; Sample code/label 2; Visual description |
| url | https://doi.org/10.1594/PANGAEA.802690 |