Identification of a large mud volcano field in the Hyuga-nada, northern end of the Ryukyu trench, offshore Japan
We identified 27 new mud volcanoes, including potential ones, in a part of the Hyuga-nada area, southwest offshore Japan, at the northern end of the Ryukyu Trench, based on subseafloor geological structures using geophysical investigations. These mud volcanoes exhibited high density and breadth and...
| Main Authors: | , , , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Frontiers Media S.A.
2023-11-01
|
| Series: | Frontiers in Earth Science |
| Subjects: | |
| Online Access: | https://www.frontiersin.org/articles/10.3389/feart.2023.1232302/full |
| _version_ | 1797447882962370560 |
|---|---|
| author | Miho Asada Mikiya Yamashita Rina Fukuchi Toshiyuki Yokota Tomohiro Toki Tomohiro Toki Akira Ijiri Akira Ijiri Kiichiro Kawamura |
| author_facet | Miho Asada Mikiya Yamashita Rina Fukuchi Toshiyuki Yokota Tomohiro Toki Tomohiro Toki Akira Ijiri Akira Ijiri Kiichiro Kawamura |
| author_sort | Miho Asada |
| collection | DOAJ |
| description | We identified 27 new mud volcanoes, including potential ones, in a part of the Hyuga-nada area, southwest offshore Japan, at the northern end of the Ryukyu Trench, based on subseafloor geological structures using geophysical investigations. These mud volcanoes exhibited high density and breadth and were likely connected to other mud volcano fields in the south. Acoustic investigations indicated subseafloor structures. Multiple acoustically transparent bodies were interpreted as a region containing gas. They were likely to appear along faults and below the bottom of valleys and sometimes reached the seafloor, expressing mud volcanoes onto the seafloor. They also indicated the wide distribution of subseafloor free-gas throughout the area. These acoustic investigations suggested that a swarm of mud volcanoes exists over the Hyuga-nada area, heterogeneously distributed along a series of plate convergent margins, the Nankai Trough, and the northern part of the Ryukyu Trench. |
| first_indexed | 2024-03-09T14:02:24Z |
| format | Article |
| id | doaj.art-e18705072eea4bf084472cc5e7584d06 |
| institution | Directory Open Access Journal |
| issn | 2296-6463 |
| language | English |
| last_indexed | 2024-03-09T14:02:24Z |
| publishDate | 2023-11-01 |
| publisher | Frontiers Media S.A. |
| record_format | Article |
| series | Frontiers in Earth Science |
| spelling | doaj.art-e18705072eea4bf084472cc5e7584d062023-11-30T07:38:38ZengFrontiers Media S.A.Frontiers in Earth Science2296-64632023-11-011110.3389/feart.2023.12323021232302Identification of a large mud volcano field in the Hyuga-nada, northern end of the Ryukyu trench, offshore JapanMiho Asada0Mikiya Yamashita1Rina Fukuchi2Toshiyuki Yokota3Tomohiro Toki4Tomohiro Toki5Akira Ijiri6Akira Ijiri7Kiichiro Kawamura8Geological Survey of Japan, National Institute of Advanced Industrial Science and Technology (AIST), Ibaraki, JapanGeological Survey of Japan, National Institute of Advanced Industrial Science and Technology (AIST), Ibaraki, JapanGraduate School of Education, Naruto University of Education, Tokushima, JapanGeological Survey of Japan, National Institute of Advanced Industrial Science and Technology (AIST), Ibaraki, JapanDepartment of Chemistry, Biology and Marine Science, Faculty of Science, University of the Ryukyus, Okinawa, JapanResearch Institute for Humanity and Nature, Kyoto, JapanGraduate School of Maritime Sciences, Kobe University, Kobe, JapanKochi Institute for Core Sample Research, Institute for Extra-cutting-edge Science and Technology Avant-garde Research (X-Star), Japan Agency for Marine-Earth Science and Technology (JAMSTEC), Kochi, JapanGraduate School of Science and Technology for Innovation, Yamaguchi University, Yamaguchi, JapanWe identified 27 new mud volcanoes, including potential ones, in a part of the Hyuga-nada area, southwest offshore Japan, at the northern end of the Ryukyu Trench, based on subseafloor geological structures using geophysical investigations. These mud volcanoes exhibited high density and breadth and were likely connected to other mud volcano fields in the south. Acoustic investigations indicated subseafloor structures. Multiple acoustically transparent bodies were interpreted as a region containing gas. They were likely to appear along faults and below the bottom of valleys and sometimes reached the seafloor, expressing mud volcanoes onto the seafloor. They also indicated the wide distribution of subseafloor free-gas throughout the area. These acoustic investigations suggested that a swarm of mud volcanoes exists over the Hyuga-nada area, heterogeneously distributed along a series of plate convergent margins, the Nankai Trough, and the northern part of the Ryukyu Trench.https://www.frontiersin.org/articles/10.3389/feart.2023.1232302/fullmud volcanoHyuga-nadaKumano Basinthree-dimensional reflection seismic surveysub-bottom profilersubseafloor structure |
| spellingShingle | Miho Asada Mikiya Yamashita Rina Fukuchi Toshiyuki Yokota Tomohiro Toki Tomohiro Toki Akira Ijiri Akira Ijiri Kiichiro Kawamura Identification of a large mud volcano field in the Hyuga-nada, northern end of the Ryukyu trench, offshore Japan Frontiers in Earth Science mud volcano Hyuga-nada Kumano Basin three-dimensional reflection seismic survey sub-bottom profiler subseafloor structure |
| title | Identification of a large mud volcano field in the Hyuga-nada, northern end of the Ryukyu trench, offshore Japan |
| title_full | Identification of a large mud volcano field in the Hyuga-nada, northern end of the Ryukyu trench, offshore Japan |
| title_fullStr | Identification of a large mud volcano field in the Hyuga-nada, northern end of the Ryukyu trench, offshore Japan |
| title_full_unstemmed | Identification of a large mud volcano field in the Hyuga-nada, northern end of the Ryukyu trench, offshore Japan |
| title_short | Identification of a large mud volcano field in the Hyuga-nada, northern end of the Ryukyu trench, offshore Japan |
| title_sort | identification of a large mud volcano field in the hyuga nada northern end of the ryukyu trench offshore japan |
| topic | mud volcano Hyuga-nada Kumano Basin three-dimensional reflection seismic survey sub-bottom profiler subseafloor structure |
| url | https://www.frontiersin.org/articles/10.3389/feart.2023.1232302/full |
| work_keys_str_mv | AT mihoasada identificationofalargemudvolcanofieldinthehyuganadanorthernendoftheryukyutrenchoffshorejapan AT mikiyayamashita identificationofalargemudvolcanofieldinthehyuganadanorthernendoftheryukyutrenchoffshorejapan AT rinafukuchi identificationofalargemudvolcanofieldinthehyuganadanorthernendoftheryukyutrenchoffshorejapan AT toshiyukiyokota identificationofalargemudvolcanofieldinthehyuganadanorthernendoftheryukyutrenchoffshorejapan AT tomohirotoki identificationofalargemudvolcanofieldinthehyuganadanorthernendoftheryukyutrenchoffshorejapan AT tomohirotoki identificationofalargemudvolcanofieldinthehyuganadanorthernendoftheryukyutrenchoffshorejapan AT akiraijiri identificationofalargemudvolcanofieldinthehyuganadanorthernendoftheryukyutrenchoffshorejapan AT akiraijiri identificationofalargemudvolcanofieldinthehyuganadanorthernendoftheryukyutrenchoffshorejapan AT kiichirokawamura identificationofalargemudvolcanofieldinthehyuganadanorthernendoftheryukyutrenchoffshorejapan |