Hydrocarbon gases in Tertiary and Quaternary sediments offshore Peru
Hydrocarbon gases (methane, ethane, propane, isobutane, n-butane, ethene, and propene) are present in Tertiary and Quaternary shelf, upper-slope, and lower-slope deposits of the Peruvian continental margin. Methane dominates the composition of the hydrocarbon gas at all 10 sites examined during Ocea...
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PANGAEA
1990
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ftpangaea:oai:pangaea.de:doi:10.1594/PANGAEA.753682 2024-09-15T18:24:27+00:00 Hydrocarbon gases in Tertiary and Quaternary sediments offshore Peru Kvenvolden, Keith A Frank, Tamara J Golan-Bac, Margaret MEDIAN LATITUDE: 25.609118 * MEDIAN LONGITUDE: -51.902014 * SOUTH-BOUND LATITUDE: -13.480160 * WEST-BOUND LONGITUDE: -90.800000 * NORTH-BOUND LATITUDE: 66.678300 * EAST-BOUND LONGITUDE: 4.576700 * DATE/TIME START: 1980-10-13T00:00:00 * DATE/TIME END: 1986-12-18T09:00:00 1990 application/zip, 3 datasets https://doi.pangaea.de/10.1594/PANGAEA.753682 https://doi.org/10.1594/PANGAEA.753682 en eng PANGAEA https://doi.pangaea.de/10.1594/PANGAEA.753682 https://doi.org/10.1594/PANGAEA.753682 CC-BY-3.0: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess Supplement to: Kvenvolden, Keith A; Frank, Tamara J; Golan-Bac, Margaret (1990): Hydrocarbon gases in Tertiary and Quaternary sediments offshore Peru - results and comparisons. In: Suess, E; von HuenE; R; et al. (eds.), Proceedings of the Ocean Drilling Program, Scientific Results, College Station, TX (Ocean Drilling Program), 112, 505-515, https://doi.org/10.2973/odp.proc.sr.112.146.1990 104-644A 112-679 112-680B 112-681B 112-681C 112-682A 112-683A 112-683B 112-684C 112-685A 112-686B 112-687B 112-688A 112-688E 76-533 76-533A 84-565 84-568 COMPCORE Composite Core Deep Sea Drilling Project DRILL Drilling/drill rig DSDP Glomar Challenger Joides Resolution Leg104 Leg112 Leg76 Leg84 North Atlantic/RIDGE North Pacific/SLOPE North Pacific/TRENCH Norwegian Sea Ocean Drilling Program ODP South Pacific Ocean dataset publication series 1990 ftpangaea https://doi.org/10.1594/PANGAEA.75368210.2973/odp.proc.sr.112.146.1990 2024-07-24T02:31:20Z Hydrocarbon gases (methane, ethane, propane, isobutane, n-butane, ethene, and propene) are present in Tertiary and Quaternary shelf, upper-slope, and lower-slope deposits of the Peruvian continental margin. Methane dominates the composition of the hydrocarbon gas at all 10 sites examined during Ocean Drilling Program (ODP) Leg 112. Generation of methane is regulated by the amount of sulfate in pore water. Wherever sulfate concentrations approach or equal zero, methane concentrations increase rapidly, reaching values near 100,000 µL/L of wet sediment at eight of the 10 sites. Methane at all 10 sites results from methanogenesis, which is inhibited where sulfate is present and microbial reduction of sulfate occurs. Hydrocarbon gases heavier than methane also are present, but at much lower concentrations than methane. These hydrocarbons are thought to result from early thermal and microbial diagenesis, based on relative gas compositions and trends of concentrations with depth. With few exceptions, the results obtained in the shipboard and shore-based laboratories are comparable for methane and ethane in sediments of Leg 112. Reanalyses of canned sediments from ODP Leg 104 and from Deep Sea Drilling Project (DSDP) Legs 76 and 84 show that gas samples can be stored for as long as 8 yr, but the amounts of individual hydrocarbon gases retained vary. Nevertheless, the trends of the data sets with depth are similar for fresh and stored samples. Other/Unknown Material North Atlantic Norwegian Sea PANGAEA - Data Publisher for Earth & Environmental Science ENVELOPE(-90.800000,4.576700,66.678300,-13.480160) |
institution |
Open Polar |
collection |
PANGAEA - Data Publisher for Earth & Environmental Science |
op_collection_id |
ftpangaea |
language |
English |
topic |
104-644A 112-679 112-680B 112-681B 112-681C 112-682A 112-683A 112-683B 112-684C 112-685A 112-686B 112-687B 112-688A 112-688E 76-533 76-533A 84-565 84-568 COMPCORE Composite Core Deep Sea Drilling Project DRILL Drilling/drill rig DSDP Glomar Challenger Joides Resolution Leg104 Leg112 Leg76 Leg84 North Atlantic/RIDGE North Pacific/SLOPE North Pacific/TRENCH Norwegian Sea Ocean Drilling Program ODP South Pacific Ocean |
spellingShingle |
104-644A 112-679 112-680B 112-681B 112-681C 112-682A 112-683A 112-683B 112-684C 112-685A 112-686B 112-687B 112-688A 112-688E 76-533 76-533A 84-565 84-568 COMPCORE Composite Core Deep Sea Drilling Project DRILL Drilling/drill rig DSDP Glomar Challenger Joides Resolution Leg104 Leg112 Leg76 Leg84 North Atlantic/RIDGE North Pacific/SLOPE North Pacific/TRENCH Norwegian Sea Ocean Drilling Program ODP South Pacific Ocean Kvenvolden, Keith A Frank, Tamara J Golan-Bac, Margaret Hydrocarbon gases in Tertiary and Quaternary sediments offshore Peru |
topic_facet |
104-644A 112-679 112-680B 112-681B 112-681C 112-682A 112-683A 112-683B 112-684C 112-685A 112-686B 112-687B 112-688A 112-688E 76-533 76-533A 84-565 84-568 COMPCORE Composite Core Deep Sea Drilling Project DRILL Drilling/drill rig DSDP Glomar Challenger Joides Resolution Leg104 Leg112 Leg76 Leg84 North Atlantic/RIDGE North Pacific/SLOPE North Pacific/TRENCH Norwegian Sea Ocean Drilling Program ODP South Pacific Ocean |
description |
Hydrocarbon gases (methane, ethane, propane, isobutane, n-butane, ethene, and propene) are present in Tertiary and Quaternary shelf, upper-slope, and lower-slope deposits of the Peruvian continental margin. Methane dominates the composition of the hydrocarbon gas at all 10 sites examined during Ocean Drilling Program (ODP) Leg 112. Generation of methane is regulated by the amount of sulfate in pore water. Wherever sulfate concentrations approach or equal zero, methane concentrations increase rapidly, reaching values near 100,000 µL/L of wet sediment at eight of the 10 sites. Methane at all 10 sites results from methanogenesis, which is inhibited where sulfate is present and microbial reduction of sulfate occurs. Hydrocarbon gases heavier than methane also are present, but at much lower concentrations than methane. These hydrocarbons are thought to result from early thermal and microbial diagenesis, based on relative gas compositions and trends of concentrations with depth. With few exceptions, the results obtained in the shipboard and shore-based laboratories are comparable for methane and ethane in sediments of Leg 112. Reanalyses of canned sediments from ODP Leg 104 and from Deep Sea Drilling Project (DSDP) Legs 76 and 84 show that gas samples can be stored for as long as 8 yr, but the amounts of individual hydrocarbon gases retained vary. Nevertheless, the trends of the data sets with depth are similar for fresh and stored samples. |
format |
Other/Unknown Material |
author |
Kvenvolden, Keith A Frank, Tamara J Golan-Bac, Margaret |
author_facet |
Kvenvolden, Keith A Frank, Tamara J Golan-Bac, Margaret |
author_sort |
Kvenvolden, Keith A |
title |
Hydrocarbon gases in Tertiary and Quaternary sediments offshore Peru |
title_short |
Hydrocarbon gases in Tertiary and Quaternary sediments offshore Peru |
title_full |
Hydrocarbon gases in Tertiary and Quaternary sediments offshore Peru |
title_fullStr |
Hydrocarbon gases in Tertiary and Quaternary sediments offshore Peru |
title_full_unstemmed |
Hydrocarbon gases in Tertiary and Quaternary sediments offshore Peru |
title_sort |
hydrocarbon gases in tertiary and quaternary sediments offshore peru |
publisher |
PANGAEA |
publishDate |
1990 |
url |
https://doi.pangaea.de/10.1594/PANGAEA.753682 https://doi.org/10.1594/PANGAEA.753682 |
op_coverage |
MEDIAN LATITUDE: 25.609118 * MEDIAN LONGITUDE: -51.902014 * SOUTH-BOUND LATITUDE: -13.480160 * WEST-BOUND LONGITUDE: -90.800000 * NORTH-BOUND LATITUDE: 66.678300 * EAST-BOUND LONGITUDE: 4.576700 * DATE/TIME START: 1980-10-13T00:00:00 * DATE/TIME END: 1986-12-18T09:00:00 |
long_lat |
ENVELOPE(-90.800000,4.576700,66.678300,-13.480160) |
genre |
North Atlantic Norwegian Sea |
genre_facet |
North Atlantic Norwegian Sea |
op_source |
Supplement to: Kvenvolden, Keith A; Frank, Tamara J; Golan-Bac, Margaret (1990): Hydrocarbon gases in Tertiary and Quaternary sediments offshore Peru - results and comparisons. In: Suess, E; von HuenE; R; et al. (eds.), Proceedings of the Ocean Drilling Program, Scientific Results, College Station, TX (Ocean Drilling Program), 112, 505-515, https://doi.org/10.2973/odp.proc.sr.112.146.1990 |
op_relation |
https://doi.pangaea.de/10.1594/PANGAEA.753682 https://doi.org/10.1594/PANGAEA.753682 |
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.75368210.2973/odp.proc.sr.112.146.1990 |
_version_ |
1810464797773266944 |