(Table 1) Gas molecules, isotopic composition and delta Deuterium in DSDP Holes 95-603D and 95-613
Methane is the major hydrocarbon gas measured in Vacutainer samples from Holes 603D and 613 ( C1/sumCn > 0.999). In Hole 613 the concentration of this dry hydrocarbon gas is highest (7.4 x 10 **5 ppm max.) in the upper 60 to 120 m, then decreases erratically to low trace levels by 261 m sub-botto...
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1987
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ftpangaea:oai:pangaea.de:doi:10.1594/PANGAEA.788516 2023-05-15T17:31:21+02:00 (Table 1) Gas molecules, isotopic composition and delta Deuterium in DSDP Holes 95-603D and 95-613 Whiticar, Michael J Faber, Eckhard MEDIAN LATITUDE: 38.635400 * MEDIAN LONGITUDE: -71.273650 * SOUTH-BOUND LATITUDE: 38.499800 * WEST-BOUND LONGITUDE: -72.523800 * NORTH-BOUND LATITUDE: 38.771000 * EAST-BOUND LONGITUDE: -70.023500 * DATE/TIME START: 1983-09-01T00:00:00 * DATE/TIME END: 1983-09-17T00:00:00 * MINIMUM DEPTH, sediment/rock: 68.8 m * MAXIMUM DEPTH, sediment/rock: 342.1 m 1987-09-12 text/tab-separated-values, 120 data points https://doi.pangaea.de/10.1594/PANGAEA.788516 https://doi.org/10.1594/PANGAEA.788516 en eng PANGAEA https://doi.pangaea.de/10.1594/PANGAEA.788516 https://doi.org/10.1594/PANGAEA.788516 CC-BY-3.0: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess CC-BY Supplement to: Whiticar, Michael J; Faber, Eckhard (1987): Carbon and hydrogen isotopes in gas samples from Leg 95, Holes 603D and 613. In: Poag, CW; Watts, AB; et al. (eds.), Initial Reports of the Deep Sea Drilling Project, Washington (U.S. Govt. Printing Office), 95, 647-650, https://doi.org/10.2973/dsdp.proc.95.127.1987 95-603D 95-613 C1/(C2+C3) hydrocarbon ratio C1/total hydrocarbon ratio Deep Sea Drilling Project DEPTH sediment/rock DRILL Drilling/drill rig DSDP DSDP/ODP/IODP sample designation Elevation of event Ethane Event label Glomar Challenger Latitude of event Leg95 Longitude of event Methane North Atlantic/CONT RISE North Atlantic/RIDGE Number Sample code/label δ13C δ Deuterium water Dataset 1987 ftpangaea https://doi.org/10.1594/PANGAEA.788516 https://doi.org/10.2973/dsdp.proc.95.127.1987 2023-01-20T08:55:14Z Methane is the major hydrocarbon gas measured in Vacutainer samples from Holes 603D and 613 ( C1/sumCn > 0.999). In Hole 613 the concentration of this dry hydrocarbon gas is highest (7.4 x 10 **5 ppm max.) in the upper 60 to 120 m, then decreases erratically to low trace levels by 261 m sub-bottom (lower Pliocene). No gas accumulations were observed in older sediments. Methane from both holes is strongly depleted in both 13C (d13C, - 75 to -85 per mil) and deuterium (D/H, - 175 to -262 per mil), indicating the biogenic origin of the methane. The C and H isotopic compositions support methanogenesis via the CO2-reduction pathway; this is also corroborated by the dissolved-sulfate and alkalinity minima at these depths. The relationship between D/H of the methane and coexisting interstitial water from Site 613 further show the methanogenesis to be primarily by CO2 reduction. Dataset North Atlantic PANGAEA - Data Publisher for Earth & Environmental Science ENVELOPE(-72.523800,-70.023500,38.771000,38.499800) |
institution |
Open Polar |
collection |
PANGAEA - Data Publisher for Earth & Environmental Science |
op_collection_id |
ftpangaea |
language |
English |
topic |
95-603D 95-613 C1/(C2+C3) hydrocarbon ratio C1/total hydrocarbon ratio Deep Sea Drilling Project DEPTH sediment/rock DRILL Drilling/drill rig DSDP DSDP/ODP/IODP sample designation Elevation of event Ethane Event label Glomar Challenger Latitude of event Leg95 Longitude of event Methane North Atlantic/CONT RISE North Atlantic/RIDGE Number Sample code/label δ13C δ Deuterium water |
spellingShingle |
95-603D 95-613 C1/(C2+C3) hydrocarbon ratio C1/total hydrocarbon ratio Deep Sea Drilling Project DEPTH sediment/rock DRILL Drilling/drill rig DSDP DSDP/ODP/IODP sample designation Elevation of event Ethane Event label Glomar Challenger Latitude of event Leg95 Longitude of event Methane North Atlantic/CONT RISE North Atlantic/RIDGE Number Sample code/label δ13C δ Deuterium water Whiticar, Michael J Faber, Eckhard (Table 1) Gas molecules, isotopic composition and delta Deuterium in DSDP Holes 95-603D and 95-613 |
topic_facet |
95-603D 95-613 C1/(C2+C3) hydrocarbon ratio C1/total hydrocarbon ratio Deep Sea Drilling Project DEPTH sediment/rock DRILL Drilling/drill rig DSDP DSDP/ODP/IODP sample designation Elevation of event Ethane Event label Glomar Challenger Latitude of event Leg95 Longitude of event Methane North Atlantic/CONT RISE North Atlantic/RIDGE Number Sample code/label δ13C δ Deuterium water |
description |
Methane is the major hydrocarbon gas measured in Vacutainer samples from Holes 603D and 613 ( C1/sumCn > 0.999). In Hole 613 the concentration of this dry hydrocarbon gas is highest (7.4 x 10 **5 ppm max.) in the upper 60 to 120 m, then decreases erratically to low trace levels by 261 m sub-bottom (lower Pliocene). No gas accumulations were observed in older sediments. Methane from both holes is strongly depleted in both 13C (d13C, - 75 to -85 per mil) and deuterium (D/H, - 175 to -262 per mil), indicating the biogenic origin of the methane. The C and H isotopic compositions support methanogenesis via the CO2-reduction pathway; this is also corroborated by the dissolved-sulfate and alkalinity minima at these depths. The relationship between D/H of the methane and coexisting interstitial water from Site 613 further show the methanogenesis to be primarily by CO2 reduction. |
format |
Dataset |
author |
Whiticar, Michael J Faber, Eckhard |
author_facet |
Whiticar, Michael J Faber, Eckhard |
author_sort |
Whiticar, Michael J |
title |
(Table 1) Gas molecules, isotopic composition and delta Deuterium in DSDP Holes 95-603D and 95-613 |
title_short |
(Table 1) Gas molecules, isotopic composition and delta Deuterium in DSDP Holes 95-603D and 95-613 |
title_full |
(Table 1) Gas molecules, isotopic composition and delta Deuterium in DSDP Holes 95-603D and 95-613 |
title_fullStr |
(Table 1) Gas molecules, isotopic composition and delta Deuterium in DSDP Holes 95-603D and 95-613 |
title_full_unstemmed |
(Table 1) Gas molecules, isotopic composition and delta Deuterium in DSDP Holes 95-603D and 95-613 |
title_sort |
(table 1) gas molecules, isotopic composition and delta deuterium in dsdp holes 95-603d and 95-613 |
publisher |
PANGAEA |
publishDate |
1987 |
url |
https://doi.pangaea.de/10.1594/PANGAEA.788516 https://doi.org/10.1594/PANGAEA.788516 |
op_coverage |
MEDIAN LATITUDE: 38.635400 * MEDIAN LONGITUDE: -71.273650 * SOUTH-BOUND LATITUDE: 38.499800 * WEST-BOUND LONGITUDE: -72.523800 * NORTH-BOUND LATITUDE: 38.771000 * EAST-BOUND LONGITUDE: -70.023500 * DATE/TIME START: 1983-09-01T00:00:00 * DATE/TIME END: 1983-09-17T00:00:00 * MINIMUM DEPTH, sediment/rock: 68.8 m * MAXIMUM DEPTH, sediment/rock: 342.1 m |
long_lat |
ENVELOPE(-72.523800,-70.023500,38.771000,38.499800) |
genre |
North Atlantic |
genre_facet |
North Atlantic |
op_source |
Supplement to: Whiticar, Michael J; Faber, Eckhard (1987): Carbon and hydrogen isotopes in gas samples from Leg 95, Holes 603D and 613. In: Poag, CW; Watts, AB; et al. (eds.), Initial Reports of the Deep Sea Drilling Project, Washington (U.S. Govt. Printing Office), 95, 647-650, https://doi.org/10.2973/dsdp.proc.95.127.1987 |
op_relation |
https://doi.pangaea.de/10.1594/PANGAEA.788516 https://doi.org/10.1594/PANGAEA.788516 |
op_rights |
CC-BY-3.0: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.1594/PANGAEA.788516 https://doi.org/10.2973/dsdp.proc.95.127.1987 |
_version_ |
1766128877756743680 |