(Table 1) Molecular and carbon-isotopic compositions of void gas from DSDP Leg 96
Molecular and isotopic compositions of void gases from Sites 618 and 619 were determined. The gases were predominantly methane with the C1/C2 ratios averaging 4,000 and 26,000 at Sites 618 and 619, respectively. The delta13C-C1 values at Site 618 were nearly constant, ranging from - 70.1 to - 73.7 p...
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1986
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ftpangaea:oai:pangaea.de:doi:10.1594/PANGAEA.788218 2023-05-15T17:53:58+02:00 (Table 1) Molecular and carbon-isotopic compositions of void gas from DSDP Leg 96 Pflaum, Ronald C Brooks, James M Cox, H Benjamin Kennicutt, Mahlon C Sheu, Der-Duen MEDIAN LATITUDE: 26.942758 * MEDIAN LONGITUDE: -89.884483 * SOUTH-BOUND LATITUDE: 26.730933 * WEST-BOUND LONGITUDE: -91.409000 * NORTH-BOUND LATITUDE: 27.193500 * EAST-BOUND LONGITUDE: -88.370800 * DATE/TIME START: 1983-10-19T00:00:00 * DATE/TIME END: 1983-10-26T00:00:00 * MINIMUM DEPTH, sediment/rock: 3.0 m * MAXIMUM DEPTH, sediment/rock: 388.0 m 1986-09-05 text/tab-separated-values, 191 data points https://doi.pangaea.de/10.1594/PANGAEA.788218 https://doi.org/10.1594/PANGAEA.788218 en eng PANGAEA https://doi.pangaea.de/10.1594/PANGAEA.788218 https://doi.org/10.1594/PANGAEA.788218 CC-BY-3.0: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess CC-BY Supplement to: Pflaum, Ronald C; Brooks, James M; Cox, H Benjamin; Kennicutt, Mahlon C; Sheu, Der-Duen (1986): Molecular and isotopic analysis of core gases and gas hydrates, Deep Sea Drilling Project Leg 96. In: Bouma, AH; Coleman, JM; Meyer, AW; et al. (eds.), Initial Reports of the Deep Sea Drilling Project, Washington (U.S. Govt. Printing Office), 96, 781-784, https://doi.org/10.2973/dsdp.proc.96.149.1986 96-618 96-619 96-620 96-621 Carbon dioxide Deep Sea Drilling Project DEPTH sediment/rock DRILL Drilling/drill rig DSDP DSDP/ODP/IODP sample designation Elevation of event Ethane Event label Gas chromatograph Carle Model 800 Gas chromatograph Hewlett-Packard 571OA Glomar Challenger Gulf of Mexico Gulf of Mexico/BASIN Gulf of Mexico/FAN Latitude of event Leg96 Longitude of event Mass spectrometer Nuclide RMS 60 Methane Methane/ethane ratio Sample code/label δ13C Dataset 1986 ftpangaea https://doi.org/10.1594/PANGAEA.788218 https://doi.org/10.2973/dsdp.proc.96.149.1986 2023-01-20T08:55:13Z Molecular and isotopic compositions of void gases from Sites 618 and 619 were determined. The gases were predominantly methane with the C1/C2 ratios averaging 4,000 and 26,000 at Sites 618 and 619, respectively. The delta13C-C1 values at Site 618 were nearly constant, ranging from - 70.1 to - 73.7 per mil. delta13C-CH1 values for Site 619 between 76 and 178 meters sub-bottom ranged from - 94.8 to - 70.8 per mil, becoming progressively heavier with depth. The molecular and isotopic compositions at both sites are characteristic of biogenic methane. Small spheres (~ 1-2 mm diameter) of gas hydrates were observed in the Orca Basin between 20 and 40 m sub-bottom and were often associated with sandy sections. The hydrate was predominantly methane with a delta13-C1 of - 7 per mil and trace amounts of ethane, propane, and carbon dioxide. The isotopic value for the methane was similar to that of the nearest gas pocket, indicating that hydrate was formed from predominantly biogenic methane without isotopic fractionation. Dataset Orca PANGAEA - Data Publisher for Earth & Environmental Science ENVELOPE(-91.409000,-88.370800,27.193500,26.730933) |
institution |
Open Polar |
collection |
PANGAEA - Data Publisher for Earth & Environmental Science |
op_collection_id |
ftpangaea |
language |
English |
topic |
96-618 96-619 96-620 96-621 Carbon dioxide Deep Sea Drilling Project DEPTH sediment/rock DRILL Drilling/drill rig DSDP DSDP/ODP/IODP sample designation Elevation of event Ethane Event label Gas chromatograph Carle Model 800 Gas chromatograph Hewlett-Packard 571OA Glomar Challenger Gulf of Mexico Gulf of Mexico/BASIN Gulf of Mexico/FAN Latitude of event Leg96 Longitude of event Mass spectrometer Nuclide RMS 60 Methane Methane/ethane ratio Sample code/label δ13C |
spellingShingle |
96-618 96-619 96-620 96-621 Carbon dioxide Deep Sea Drilling Project DEPTH sediment/rock DRILL Drilling/drill rig DSDP DSDP/ODP/IODP sample designation Elevation of event Ethane Event label Gas chromatograph Carle Model 800 Gas chromatograph Hewlett-Packard 571OA Glomar Challenger Gulf of Mexico Gulf of Mexico/BASIN Gulf of Mexico/FAN Latitude of event Leg96 Longitude of event Mass spectrometer Nuclide RMS 60 Methane Methane/ethane ratio Sample code/label δ13C Pflaum, Ronald C Brooks, James M Cox, H Benjamin Kennicutt, Mahlon C Sheu, Der-Duen (Table 1) Molecular and carbon-isotopic compositions of void gas from DSDP Leg 96 |
topic_facet |
96-618 96-619 96-620 96-621 Carbon dioxide Deep Sea Drilling Project DEPTH sediment/rock DRILL Drilling/drill rig DSDP DSDP/ODP/IODP sample designation Elevation of event Ethane Event label Gas chromatograph Carle Model 800 Gas chromatograph Hewlett-Packard 571OA Glomar Challenger Gulf of Mexico Gulf of Mexico/BASIN Gulf of Mexico/FAN Latitude of event Leg96 Longitude of event Mass spectrometer Nuclide RMS 60 Methane Methane/ethane ratio Sample code/label δ13C |
description |
Molecular and isotopic compositions of void gases from Sites 618 and 619 were determined. The gases were predominantly methane with the C1/C2 ratios averaging 4,000 and 26,000 at Sites 618 and 619, respectively. The delta13C-C1 values at Site 618 were nearly constant, ranging from - 70.1 to - 73.7 per mil. delta13C-CH1 values for Site 619 between 76 and 178 meters sub-bottom ranged from - 94.8 to - 70.8 per mil, becoming progressively heavier with depth. The molecular and isotopic compositions at both sites are characteristic of biogenic methane. Small spheres (~ 1-2 mm diameter) of gas hydrates were observed in the Orca Basin between 20 and 40 m sub-bottom and were often associated with sandy sections. The hydrate was predominantly methane with a delta13-C1 of - 7 per mil and trace amounts of ethane, propane, and carbon dioxide. The isotopic value for the methane was similar to that of the nearest gas pocket, indicating that hydrate was formed from predominantly biogenic methane without isotopic fractionation. |
format |
Dataset |
author |
Pflaum, Ronald C Brooks, James M Cox, H Benjamin Kennicutt, Mahlon C Sheu, Der-Duen |
author_facet |
Pflaum, Ronald C Brooks, James M Cox, H Benjamin Kennicutt, Mahlon C Sheu, Der-Duen |
author_sort |
Pflaum, Ronald C |
title |
(Table 1) Molecular and carbon-isotopic compositions of void gas from DSDP Leg 96 |
title_short |
(Table 1) Molecular and carbon-isotopic compositions of void gas from DSDP Leg 96 |
title_full |
(Table 1) Molecular and carbon-isotopic compositions of void gas from DSDP Leg 96 |
title_fullStr |
(Table 1) Molecular and carbon-isotopic compositions of void gas from DSDP Leg 96 |
title_full_unstemmed |
(Table 1) Molecular and carbon-isotopic compositions of void gas from DSDP Leg 96 |
title_sort |
(table 1) molecular and carbon-isotopic compositions of void gas from dsdp leg 96 |
publisher |
PANGAEA |
publishDate |
1986 |
url |
https://doi.pangaea.de/10.1594/PANGAEA.788218 https://doi.org/10.1594/PANGAEA.788218 |
op_coverage |
MEDIAN LATITUDE: 26.942758 * MEDIAN LONGITUDE: -89.884483 * SOUTH-BOUND LATITUDE: 26.730933 * WEST-BOUND LONGITUDE: -91.409000 * NORTH-BOUND LATITUDE: 27.193500 * EAST-BOUND LONGITUDE: -88.370800 * DATE/TIME START: 1983-10-19T00:00:00 * DATE/TIME END: 1983-10-26T00:00:00 * MINIMUM DEPTH, sediment/rock: 3.0 m * MAXIMUM DEPTH, sediment/rock: 388.0 m |
long_lat |
ENVELOPE(-91.409000,-88.370800,27.193500,26.730933) |
genre |
Orca |
genre_facet |
Orca |
op_source |
Supplement to: Pflaum, Ronald C; Brooks, James M; Cox, H Benjamin; Kennicutt, Mahlon C; Sheu, Der-Duen (1986): Molecular and isotopic analysis of core gases and gas hydrates, Deep Sea Drilling Project Leg 96. In: Bouma, AH; Coleman, JM; Meyer, AW; et al. (eds.), Initial Reports of the Deep Sea Drilling Project, Washington (U.S. Govt. Printing Office), 96, 781-784, https://doi.org/10.2973/dsdp.proc.96.149.1986 |
op_relation |
https://doi.pangaea.de/10.1594/PANGAEA.788218 https://doi.org/10.1594/PANGAEA.788218 |
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.788218 https://doi.org/10.2973/dsdp.proc.96.149.1986 |
_version_ |
1766161687177592832 |