Elemental and isotope compositions of lipids, kerogens and asphaltenes from samples of DSDP Hole 41-368
The thermal effects of three (one major and two minor) Miocene diabase intrusions on Cretaceous black shales from DSDP site 41-368 have been analyzed. A concentration gradient was observed, especially for the hydrocarbons, decreasing towards the major intrusion and between the three sills. The therm...
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ftpangaea:oai:pangaea.de:doi:10.1594/PANGAEA.707165 2024-09-15T18:24:23+00:00 Elemental and isotope compositions of lipids, kerogens and asphaltenes from samples of DSDP Hole 41-368 Simoneit, Bernd R T Brenner, Shmuel Peters, K E Kaplan, I R LATITUDE: 17.507200 * LONGITUDE: -21.353800 * DATE/TIME START: 1975-03-13T00:00:00 * DATE/TIME END: 1975-03-13T00:00:00 1981 application/zip, 2 datasets https://doi.pangaea.de/10.1594/PANGAEA.707165 https://doi.org/10.1594/PANGAEA.707165 en eng PANGAEA https://doi.pangaea.de/10.1594/PANGAEA.707165 https://doi.org/10.1594/PANGAEA.707165 CC-BY-3.0: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess Supplement to: Simoneit, Bernd R T; Brenner, Shmuel; Peters, K E; Kaplan, I R (1981): Thermal alteration of Cretaceous black shale by diabase intrusions in the eastern Atlantic - II. Effects on bitumen and kerogen. Geochimica et Cosmochimica Acta, 45(9), 1581-1602, https://doi.org/10.1016/0016-7037(81)90287-8 41-368 Deep Sea Drilling Project DRILL Drilling/drill rig DSDP Glomar Challenger Leg41 North Atlantic/CONT RISE dataset publication series 1981 ftpangaea https://doi.org/10.1594/PANGAEA.70716510.1016/0016-7037(81)90287-8 2024-07-24T02:31:42Z The thermal effects of three (one major and two minor) Miocene diabase intrusions on Cretaceous black shales from DSDP site 41-368 have been analyzed. A concentration gradient was observed, especially for the hydrocarbons, decreasing towards the major intrusion and between the three sills. The thermally-altered samples in the proximity of and between the sills contained elemental sulfur and an excess of thermally-derived pristane over phytane. whereas, the unaltered sediments contained no elemental sulfur, and more phytane than pristane. A maximum yield of the extractable hydrocarbons was observed at a depth of 7 m below the major sill. Two classes of molecular markers were present in this bitumen suite. The first was sesqui-, di- and triterpenoids and steranes. which could be correlated with both terrigenous and autochthonous sources. They were geologically mature and showed no significant changes due to the thermal stress. The second class was found in the altered samples, which contained only polynuclear aromatic hydrocarbons with low alkyl substitution and sulfur and oxygen heterocyclic aromatic compounds. These compounds were derived from pyrolytic reactions during the thermal event. Kerogen was isolated from all of these samples, but only traces of humic substances were present. The H/C, N/C, d13C, d34S and dD all exhibit the expected effects of thermal stress. The kerogen becomes more aromatized and richer in 13C, 34S and D in the proximity of and between the sills. Maturation trends were also measured by the vitrinite reflectance and electron spin resonance, where the thermal stress could be correlated with an elevated country rock temperature and an increased degree of aromaticity. The effects of in situ thermal stress on the organic-rich shales resulted in the generation and expulsion of petroliferous material from the vicinity of the sills. Other/Unknown Material North Atlantic PANGAEA - Data Publisher for Earth & Environmental Science ENVELOPE(-21.353800,-21.353800,17.507200,17.507200) |
institution |
Open Polar |
collection |
PANGAEA - Data Publisher for Earth & Environmental Science |
op_collection_id |
ftpangaea |
language |
English |
topic |
41-368 Deep Sea Drilling Project DRILL Drilling/drill rig DSDP Glomar Challenger Leg41 North Atlantic/CONT RISE |
spellingShingle |
41-368 Deep Sea Drilling Project DRILL Drilling/drill rig DSDP Glomar Challenger Leg41 North Atlantic/CONT RISE Simoneit, Bernd R T Brenner, Shmuel Peters, K E Kaplan, I R Elemental and isotope compositions of lipids, kerogens and asphaltenes from samples of DSDP Hole 41-368 |
topic_facet |
41-368 Deep Sea Drilling Project DRILL Drilling/drill rig DSDP Glomar Challenger Leg41 North Atlantic/CONT RISE |
description |
The thermal effects of three (one major and two minor) Miocene diabase intrusions on Cretaceous black shales from DSDP site 41-368 have been analyzed. A concentration gradient was observed, especially for the hydrocarbons, decreasing towards the major intrusion and between the three sills. The thermally-altered samples in the proximity of and between the sills contained elemental sulfur and an excess of thermally-derived pristane over phytane. whereas, the unaltered sediments contained no elemental sulfur, and more phytane than pristane. A maximum yield of the extractable hydrocarbons was observed at a depth of 7 m below the major sill. Two classes of molecular markers were present in this bitumen suite. The first was sesqui-, di- and triterpenoids and steranes. which could be correlated with both terrigenous and autochthonous sources. They were geologically mature and showed no significant changes due to the thermal stress. The second class was found in the altered samples, which contained only polynuclear aromatic hydrocarbons with low alkyl substitution and sulfur and oxygen heterocyclic aromatic compounds. These compounds were derived from pyrolytic reactions during the thermal event. Kerogen was isolated from all of these samples, but only traces of humic substances were present. The H/C, N/C, d13C, d34S and dD all exhibit the expected effects of thermal stress. The kerogen becomes more aromatized and richer in 13C, 34S and D in the proximity of and between the sills. Maturation trends were also measured by the vitrinite reflectance and electron spin resonance, where the thermal stress could be correlated with an elevated country rock temperature and an increased degree of aromaticity. The effects of in situ thermal stress on the organic-rich shales resulted in the generation and expulsion of petroliferous material from the vicinity of the sills. |
format |
Other/Unknown Material |
author |
Simoneit, Bernd R T Brenner, Shmuel Peters, K E Kaplan, I R |
author_facet |
Simoneit, Bernd R T Brenner, Shmuel Peters, K E Kaplan, I R |
author_sort |
Simoneit, Bernd R T |
title |
Elemental and isotope compositions of lipids, kerogens and asphaltenes from samples of DSDP Hole 41-368 |
title_short |
Elemental and isotope compositions of lipids, kerogens and asphaltenes from samples of DSDP Hole 41-368 |
title_full |
Elemental and isotope compositions of lipids, kerogens and asphaltenes from samples of DSDP Hole 41-368 |
title_fullStr |
Elemental and isotope compositions of lipids, kerogens and asphaltenes from samples of DSDP Hole 41-368 |
title_full_unstemmed |
Elemental and isotope compositions of lipids, kerogens and asphaltenes from samples of DSDP Hole 41-368 |
title_sort |
elemental and isotope compositions of lipids, kerogens and asphaltenes from samples of dsdp hole 41-368 |
publisher |
PANGAEA |
publishDate |
1981 |
url |
https://doi.pangaea.de/10.1594/PANGAEA.707165 https://doi.org/10.1594/PANGAEA.707165 |
op_coverage |
LATITUDE: 17.507200 * LONGITUDE: -21.353800 * DATE/TIME START: 1975-03-13T00:00:00 * DATE/TIME END: 1975-03-13T00:00:00 |
long_lat |
ENVELOPE(-21.353800,-21.353800,17.507200,17.507200) |
genre |
North Atlantic |
genre_facet |
North Atlantic |
op_source |
Supplement to: Simoneit, Bernd R T; Brenner, Shmuel; Peters, K E; Kaplan, I R (1981): Thermal alteration of Cretaceous black shale by diabase intrusions in the eastern Atlantic - II. Effects on bitumen and kerogen. Geochimica et Cosmochimica Acta, 45(9), 1581-1602, https://doi.org/10.1016/0016-7037(81)90287-8 |
op_relation |
https://doi.pangaea.de/10.1594/PANGAEA.707165 https://doi.org/10.1594/PANGAEA.707165 |
op_rights |
CC-BY-3.0: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.1594/PANGAEA.70716510.1016/0016-7037(81)90287-8 |
_version_ |
1810464717177618432 |