Role of tectonic stress in seepage evolution along the gas hydrate‐charged Vestnesa Ridge, Fram Strait
Methane expulsion from the world ocean floor is a broadly observed phenomenon known to be episodic. Yet the processes that modulate seepage remain elusive. In the Arctic offshore west Svalbard, for instance, seepage at 200–400 m water depth may be explained by ocean temperature‐controlled gas hydrat...
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ftuninhampshire:oai:scholars.unh.edu:faculty_pubs-1521 2023-05-15T14:55:07+02:00 Role of tectonic stress in seepage evolution along the gas hydrate‐charged Vestnesa Ridge, Fram Strait Faverola, Andreia Plaza Bunz, Stefan Johnson, Joel E. Chand, Shyam Knies, Jochen Mienert, Jurgen Franek, Peter 2015-01-13T08:00:00Z application/pdf https://scholars.unh.edu/faculty_pubs/522 https://scholars.unh.edu/cgi/viewcontent.cgi?article=1521&context=faculty_pubs unknown University of New Hampshire Scholars' Repository https://scholars.unh.edu/faculty_pubs/522 https://scholars.unh.edu/cgi/viewcontent.cgi?article=1521&context=faculty_pubs ©2015. American Geophysical Union. All Rights Reserved. Faculty Publications 3‐D seismic hydrates methane seepage tectonic stress Vestnesa Ridge Arctic text 2015 ftuninhampshire 2023-01-30T21:50:25Z Methane expulsion from the world ocean floor is a broadly observed phenomenon known to be episodic. Yet the processes that modulate seepage remain elusive. In the Arctic offshore west Svalbard, for instance, seepage at 200–400 m water depth may be explained by ocean temperature‐controlled gas hydrate instabilities at the shelf break, but additional processes are required to explain seepage in permanently cold waters at depths >1000 m. We discuss the influence of tectonic stress on seepage evolution along the ~100 km long hydrate‐bearing Vestnesa Ridge in Fram Strait. High‐resolution P‐Cable 3‐D seismic data revealed fine‐scale (>10 m width) near‐vertical faults and fractures controlling seepage distribution. Gas chimneys record multiple seepage events coinciding with glacial intensification and active faulting. The faults document the influence of nearby tectonic stress fields in seepage evolution along this deepwater gas hydrate system for at least the last ~2.7 Ma. Text Arctic Fram Strait Svalbard University of New Hampshire: Scholars Repository Arctic Svalbard |
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University of New Hampshire: Scholars Repository |
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ftuninhampshire |
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unknown |
topic |
3‐D seismic hydrates methane seepage tectonic stress Vestnesa Ridge Arctic |
spellingShingle |
3‐D seismic hydrates methane seepage tectonic stress Vestnesa Ridge Arctic Faverola, Andreia Plaza Bunz, Stefan Johnson, Joel E. Chand, Shyam Knies, Jochen Mienert, Jurgen Franek, Peter Role of tectonic stress in seepage evolution along the gas hydrate‐charged Vestnesa Ridge, Fram Strait |
topic_facet |
3‐D seismic hydrates methane seepage tectonic stress Vestnesa Ridge Arctic |
description |
Methane expulsion from the world ocean floor is a broadly observed phenomenon known to be episodic. Yet the processes that modulate seepage remain elusive. In the Arctic offshore west Svalbard, for instance, seepage at 200–400 m water depth may be explained by ocean temperature‐controlled gas hydrate instabilities at the shelf break, but additional processes are required to explain seepage in permanently cold waters at depths >1000 m. We discuss the influence of tectonic stress on seepage evolution along the ~100 km long hydrate‐bearing Vestnesa Ridge in Fram Strait. High‐resolution P‐Cable 3‐D seismic data revealed fine‐scale (>10 m width) near‐vertical faults and fractures controlling seepage distribution. Gas chimneys record multiple seepage events coinciding with glacial intensification and active faulting. The faults document the influence of nearby tectonic stress fields in seepage evolution along this deepwater gas hydrate system for at least the last ~2.7 Ma. |
format |
Text |
author |
Faverola, Andreia Plaza Bunz, Stefan Johnson, Joel E. Chand, Shyam Knies, Jochen Mienert, Jurgen Franek, Peter |
author_facet |
Faverola, Andreia Plaza Bunz, Stefan Johnson, Joel E. Chand, Shyam Knies, Jochen Mienert, Jurgen Franek, Peter |
author_sort |
Faverola, Andreia Plaza |
title |
Role of tectonic stress in seepage evolution along the gas hydrate‐charged Vestnesa Ridge, Fram Strait |
title_short |
Role of tectonic stress in seepage evolution along the gas hydrate‐charged Vestnesa Ridge, Fram Strait |
title_full |
Role of tectonic stress in seepage evolution along the gas hydrate‐charged Vestnesa Ridge, Fram Strait |
title_fullStr |
Role of tectonic stress in seepage evolution along the gas hydrate‐charged Vestnesa Ridge, Fram Strait |
title_full_unstemmed |
Role of tectonic stress in seepage evolution along the gas hydrate‐charged Vestnesa Ridge, Fram Strait |
title_sort |
role of tectonic stress in seepage evolution along the gas hydrate‐charged vestnesa ridge, fram strait |
publisher |
University of New Hampshire Scholars' Repository |
publishDate |
2015 |
url |
https://scholars.unh.edu/faculty_pubs/522 https://scholars.unh.edu/cgi/viewcontent.cgi?article=1521&context=faculty_pubs |
geographic |
Arctic Svalbard |
geographic_facet |
Arctic Svalbard |
genre |
Arctic Fram Strait Svalbard |
genre_facet |
Arctic Fram Strait Svalbard |
op_source |
Faculty Publications |
op_relation |
https://scholars.unh.edu/faculty_pubs/522 https://scholars.unh.edu/cgi/viewcontent.cgi?article=1521&context=faculty_pubs |
op_rights |
©2015. American Geophysical Union. All Rights Reserved. |
_version_ |
1766326905163743232 |