Production, consumption, and migration of methane in accretionary prism of southwestern Taiwan
Source at https://doi.org/10.1002/2017GC006798 To systematically quantify the production, consumption, and migration of methane, 210 sediment cores were collected from offshore southwestern Taiwan and analyzed for their gas and aqueous geochemistry. These data, combined with published results, were...
Published in: | Geochemistry, Geophysics, Geosystems |
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Online Access: | https://hdl.handle.net/10037/12435 https://doi.org/10.1002/2017GC006798 |
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ftunivtroemsoe:oai:munin.uit.no:10037/12435 2023-05-15T14:27:10+02:00 Production, consumption, and migration of methane in accretionary prism of southwestern Taiwan Chen, Nai-Chen Yang, Tsanyao Frank Hong, Wei-Li Chen, Hsuan-Wen Chen, Hsiao-Chi Hu, Ching-Yi Huang, Yu-Chun Lin, Saulwood Lin, Li-Hung Su, Chih-Chieh Liao, Wei-Zhi Sun, Chih-Hsien Wang, Pei-Ling Yang, Tao Jiang, Shao-Yong Liu, Char-Shine Wang, Yunshuen Chung, San-Hsiung 2017-07-15 https://hdl.handle.net/10037/12435 https://doi.org/10.1002/2017GC006798 eng eng American Geophysical Union Geochemistry Geophysics Geosystems info:eu-repo/grantAgreement/RCN/SFF/223259/NORWAY/Centre for Arctic Gas Hydrate, Environment and Climate/CAGE/ Chen N. -C., Yang, T. F., Hong, W. -L., Chen, H. -W., Chen, H. -C., Hu, C. -Y. . Chung, S. (2017). Production, consumption, and migration of methane in accretionary prism of southwestern Taiwan. Geochemistry Geophysics Geosystems. 18(8):2970-2989 FRIDAID 1500528 doi:10.1002/2017GC006798 1525-2027 https://hdl.handle.net/10037/12435 openAccess Taiwan subduction methane efflux anaerobic methanotrophy methanogenesis thermal maturation VDP::Matematikk og Naturvitenskap: 400::Geofag: 450::Mineralogi petrologi geokjemi: 462 VDP::Mathematics and natural science: 400::Geosciences: 450::Mineralogy petrology geochemistry: 462 Journal article Tidsskriftartikkel Peer reviewed 2017 ftunivtroemsoe https://doi.org/10.1002/2017GC006798 2021-06-25T17:55:51Z Source at https://doi.org/10.1002/2017GC006798 To systematically quantify the production, consumption, and migration of methane, 210 sediment cores were collected from offshore southwestern Taiwan and analyzed for their gas and aqueous geochemistry. These data, combined with published results, were used to calculate the diffusive methane fluxes across different geochemical transitions and to develop scenarios of mass balance and constrain deep microbial and thermogenic methane production rates within the accretionary prism. The results showed that methane diffusive fluxes ranged from 2.71 × 10 −3 to 2.78 × 10 −1 and from –1.88 × 10 −1 to 3.97 mmol m −2 d −1 at the sulfate‐methane‐transition‐zone (SMTZ) and sediment‐seawater interfaces, respectively. High methane fluxes tend to be associated with structural features, suggesting a strong structural control on the methane transport. A significant portion of ascending methane (>50%) is consumed by anaerobic oxidation of methane at the SMTZ at most sites, indicating effective biological filtration. Gas compositions and isotopes revealed a transition from the predominance of microbial methane in the passive margin to thermogenic methane at the upper slope of the active margin and onshore mud volcanoes. Methane production and consumption at shallow depths were nearly offset with a small fraction of residual methane discharged into seawater. The flux imbalance arose primarily due to the larger production of methane through deep microbial and thermogenic processes at a magnitude of 1512–43,096 Tg Myr −1 and could be likely accounted for by the sequestration of methane into hydrate forms, and clay absorption. Article in Journal/Newspaper Arctic University of Tromsø: Munin Open Research Archive Geochemistry, Geophysics, Geosystems 18 8 2970 2989 |
institution |
Open Polar |
collection |
University of Tromsø: Munin Open Research Archive |
op_collection_id |
ftunivtroemsoe |
language |
English |
topic |
Taiwan subduction methane efflux anaerobic methanotrophy methanogenesis thermal maturation VDP::Matematikk og Naturvitenskap: 400::Geofag: 450::Mineralogi petrologi geokjemi: 462 VDP::Mathematics and natural science: 400::Geosciences: 450::Mineralogy petrology geochemistry: 462 |
spellingShingle |
Taiwan subduction methane efflux anaerobic methanotrophy methanogenesis thermal maturation VDP::Matematikk og Naturvitenskap: 400::Geofag: 450::Mineralogi petrologi geokjemi: 462 VDP::Mathematics and natural science: 400::Geosciences: 450::Mineralogy petrology geochemistry: 462 Chen, Nai-Chen Yang, Tsanyao Frank Hong, Wei-Li Chen, Hsuan-Wen Chen, Hsiao-Chi Hu, Ching-Yi Huang, Yu-Chun Lin, Saulwood Lin, Li-Hung Su, Chih-Chieh Liao, Wei-Zhi Sun, Chih-Hsien Wang, Pei-Ling Yang, Tao Jiang, Shao-Yong Liu, Char-Shine Wang, Yunshuen Chung, San-Hsiung Production, consumption, and migration of methane in accretionary prism of southwestern Taiwan |
topic_facet |
Taiwan subduction methane efflux anaerobic methanotrophy methanogenesis thermal maturation VDP::Matematikk og Naturvitenskap: 400::Geofag: 450::Mineralogi petrologi geokjemi: 462 VDP::Mathematics and natural science: 400::Geosciences: 450::Mineralogy petrology geochemistry: 462 |
description |
Source at https://doi.org/10.1002/2017GC006798 To systematically quantify the production, consumption, and migration of methane, 210 sediment cores were collected from offshore southwestern Taiwan and analyzed for their gas and aqueous geochemistry. These data, combined with published results, were used to calculate the diffusive methane fluxes across different geochemical transitions and to develop scenarios of mass balance and constrain deep microbial and thermogenic methane production rates within the accretionary prism. The results showed that methane diffusive fluxes ranged from 2.71 × 10 −3 to 2.78 × 10 −1 and from –1.88 × 10 −1 to 3.97 mmol m −2 d −1 at the sulfate‐methane‐transition‐zone (SMTZ) and sediment‐seawater interfaces, respectively. High methane fluxes tend to be associated with structural features, suggesting a strong structural control on the methane transport. A significant portion of ascending methane (>50%) is consumed by anaerobic oxidation of methane at the SMTZ at most sites, indicating effective biological filtration. Gas compositions and isotopes revealed a transition from the predominance of microbial methane in the passive margin to thermogenic methane at the upper slope of the active margin and onshore mud volcanoes. Methane production and consumption at shallow depths were nearly offset with a small fraction of residual methane discharged into seawater. The flux imbalance arose primarily due to the larger production of methane through deep microbial and thermogenic processes at a magnitude of 1512–43,096 Tg Myr −1 and could be likely accounted for by the sequestration of methane into hydrate forms, and clay absorption. |
format |
Article in Journal/Newspaper |
author |
Chen, Nai-Chen Yang, Tsanyao Frank Hong, Wei-Li Chen, Hsuan-Wen Chen, Hsiao-Chi Hu, Ching-Yi Huang, Yu-Chun Lin, Saulwood Lin, Li-Hung Su, Chih-Chieh Liao, Wei-Zhi Sun, Chih-Hsien Wang, Pei-Ling Yang, Tao Jiang, Shao-Yong Liu, Char-Shine Wang, Yunshuen Chung, San-Hsiung |
author_facet |
Chen, Nai-Chen Yang, Tsanyao Frank Hong, Wei-Li Chen, Hsuan-Wen Chen, Hsiao-Chi Hu, Ching-Yi Huang, Yu-Chun Lin, Saulwood Lin, Li-Hung Su, Chih-Chieh Liao, Wei-Zhi Sun, Chih-Hsien Wang, Pei-Ling Yang, Tao Jiang, Shao-Yong Liu, Char-Shine Wang, Yunshuen Chung, San-Hsiung |
author_sort |
Chen, Nai-Chen |
title |
Production, consumption, and migration of methane in accretionary prism of southwestern Taiwan |
title_short |
Production, consumption, and migration of methane in accretionary prism of southwestern Taiwan |
title_full |
Production, consumption, and migration of methane in accretionary prism of southwestern Taiwan |
title_fullStr |
Production, consumption, and migration of methane in accretionary prism of southwestern Taiwan |
title_full_unstemmed |
Production, consumption, and migration of methane in accretionary prism of southwestern Taiwan |
title_sort |
production, consumption, and migration of methane in accretionary prism of southwestern taiwan |
publisher |
American Geophysical Union |
publishDate |
2017 |
url |
https://hdl.handle.net/10037/12435 https://doi.org/10.1002/2017GC006798 |
genre |
Arctic |
genre_facet |
Arctic |
op_relation |
Geochemistry Geophysics Geosystems info:eu-repo/grantAgreement/RCN/SFF/223259/NORWAY/Centre for Arctic Gas Hydrate, Environment and Climate/CAGE/ Chen N. -C., Yang, T. F., Hong, W. -L., Chen, H. -W., Chen, H. -C., Hu, C. -Y. . Chung, S. (2017). Production, consumption, and migration of methane in accretionary prism of southwestern Taiwan. Geochemistry Geophysics Geosystems. 18(8):2970-2989 FRIDAID 1500528 doi:10.1002/2017GC006798 1525-2027 https://hdl.handle.net/10037/12435 |
op_rights |
openAccess |
op_doi |
https://doi.org/10.1002/2017GC006798 |
container_title |
Geochemistry, Geophysics, Geosystems |
container_volume |
18 |
container_issue |
8 |
container_start_page |
2970 |
op_container_end_page |
2989 |
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1766300769955348480 |