Gravity inversion constrained by OBS receiver function reveals crustal structure in Ryukyu Trench
The Ryukyu Trench is located in the northern Philippine Sea. The subduction of the Philippine Sea Plate to the Eurasia Plate along the Ryukyu Trench in the NNW direction leads to extremely complex tectonic processes such as subduction, collision, accretion, and back-arc expansion. It is of great sig...
| Main Authors: | , , , , , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Frontiers Media S.A.
2023-04-01
|
| Series: | Frontiers in Earth Science |
| Subjects: | |
| Online Access: | https://www.frontiersin.org/articles/10.3389/feart.2023.1187683/full |
| _version_ | 1827964039996637184 |
|---|---|
| author | Tingwei Yang Tingwei Yang Ya Xu Ya Xu Ya Xu Nanqiao Du Tao Xu Tao Xu Danping Cao Fangzhou Nan Fangzhou Nan Fangzhou Nan Wei Chu Ce Liang Tianyao Hao Tianyao Hao Tianyao Hao |
| author_facet | Tingwei Yang Tingwei Yang Ya Xu Ya Xu Ya Xu Nanqiao Du Tao Xu Tao Xu Danping Cao Fangzhou Nan Fangzhou Nan Fangzhou Nan Wei Chu Ce Liang Tianyao Hao Tianyao Hao Tianyao Hao |
| author_sort | Tingwei Yang |
| collection | DOAJ |
| description | The Ryukyu Trench is located in the northern Philippine Sea. The subduction of the Philippine Sea Plate to the Eurasia Plate along the Ryukyu Trench in the NNW direction leads to extremely complex tectonic processes such as subduction, collision, accretion, and back-arc expansion. It is of great significance to obtain the crustal structure of the Ryukyu Trench for understanding the crustal deformation characteristics, subduction direction and the scale of the Philippine Sea Plate. The ocean bottom seismometer (OBS) could provide important information on the deep structure of the oceanic area, and the wide coverage of gravity anomaly can provide more constraints for the regional crustal structure. In this study, we put the time-delay term of the sedimentary layer into the H-κ stacking formula, which eliminates the influence of the sedimentary layer in traditional H-κ stacking. Based on the accurate crustal thickness at OBS locations, a gravity inversion method is proposed to solve the problem of non-uniqueness in gravity data and limited distribution of OBSs. By using this method, we obtain a crustal structure with higher resolution than Crust1.0 model in Ryukyu Trench. The results show that the crustal thickness in the Ryukyu Trench region thickens along the NNW subduction direction, revealing that the Philippine Plate’s subduction direction towards the Eurasian Plate is in the NNW direction. |
| first_indexed | 2024-04-09T17:08:55Z |
| format | Article |
| id | doaj.art-a97bbdc714434d6fb5978a51663d88df |
| institution | Directory Open Access Journal |
| issn | 2296-6463 |
| language | English |
| last_indexed | 2024-04-09T17:08:55Z |
| publishDate | 2023-04-01 |
| publisher | Frontiers Media S.A. |
| record_format | Article |
| series | Frontiers in Earth Science |
| spelling | doaj.art-a97bbdc714434d6fb5978a51663d88df2023-04-20T08:54:37ZengFrontiers Media S.A.Frontiers in Earth Science2296-64632023-04-011110.3389/feart.2023.11876831187683Gravity inversion constrained by OBS receiver function reveals crustal structure in Ryukyu TrenchTingwei Yang0Tingwei Yang1Ya Xu2Ya Xu3Ya Xu4Nanqiao Du5Tao Xu6Tao Xu7Danping Cao8Fangzhou Nan9Fangzhou Nan10Fangzhou Nan11Wei Chu12Ce Liang13Tianyao Hao14Tianyao Hao15Tianyao Hao16Key Laboratory of Mineral Resources, Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing, ChinaCollege of Earth and Planetary Sciences, University of Chinese Academy of Sciences, Beijing, ChinaKey Laboratory of Petroleum Resources Research, Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing, ChinaInnovation Academy for Earth Science, Chinese Academy of Sciences, Beijing, ChinaCollege of Earth and Planetary Sciences, University of Chinese Academy of Sciences, Beijing, ChinaDepartment of Earth Sciences, University of Toronto, Toronto, ON, CanadaKey Laboratory of Mineral Resources, Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing, ChinaInnovation Academy for Earth Science, Chinese Academy of Sciences, Beijing, ChinaSchool of Geosciences, China University of Petroleum, Qingdao, ChinaKey Laboratory of Petroleum Resources Research, Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing, ChinaInnovation Academy for Earth Science, Chinese Academy of Sciences, Beijing, ChinaCollege of Earth and Planetary Sciences, University of Chinese Academy of Sciences, Beijing, ChinaCollege of Earth and Planetary Sciences, University of Chinese Academy of Sciences, Beijing, ChinaCollege of Marine Technology, Faculty of Information Science and Engineering, Ocean University of China, Qingdao, ChinaKey Laboratory of Petroleum Resources Research, Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing, ChinaInnovation Academy for Earth Science, Chinese Academy of Sciences, Beijing, ChinaCollege of Earth and Planetary Sciences, University of Chinese Academy of Sciences, Beijing, ChinaThe Ryukyu Trench is located in the northern Philippine Sea. The subduction of the Philippine Sea Plate to the Eurasia Plate along the Ryukyu Trench in the NNW direction leads to extremely complex tectonic processes such as subduction, collision, accretion, and back-arc expansion. It is of great significance to obtain the crustal structure of the Ryukyu Trench for understanding the crustal deformation characteristics, subduction direction and the scale of the Philippine Sea Plate. The ocean bottom seismometer (OBS) could provide important information on the deep structure of the oceanic area, and the wide coverage of gravity anomaly can provide more constraints for the regional crustal structure. In this study, we put the time-delay term of the sedimentary layer into the H-κ stacking formula, which eliminates the influence of the sedimentary layer in traditional H-κ stacking. Based on the accurate crustal thickness at OBS locations, a gravity inversion method is proposed to solve the problem of non-uniqueness in gravity data and limited distribution of OBSs. By using this method, we obtain a crustal structure with higher resolution than Crust1.0 model in Ryukyu Trench. The results show that the crustal thickness in the Ryukyu Trench region thickens along the NNW subduction direction, revealing that the Philippine Plate’s subduction direction towards the Eurasian Plate is in the NNW direction.https://www.frontiersin.org/articles/10.3389/feart.2023.1187683/fullgravity inversionocean bottom seismometerreceiver functionRyukyu TrenchH-κ stacking |
| spellingShingle | Tingwei Yang Tingwei Yang Ya Xu Ya Xu Ya Xu Nanqiao Du Tao Xu Tao Xu Danping Cao Fangzhou Nan Fangzhou Nan Fangzhou Nan Wei Chu Ce Liang Tianyao Hao Tianyao Hao Tianyao Hao Gravity inversion constrained by OBS receiver function reveals crustal structure in Ryukyu Trench Frontiers in Earth Science gravity inversion ocean bottom seismometer receiver function Ryukyu Trench H-κ stacking |
| title | Gravity inversion constrained by OBS receiver function reveals crustal structure in Ryukyu Trench |
| title_full | Gravity inversion constrained by OBS receiver function reveals crustal structure in Ryukyu Trench |
| title_fullStr | Gravity inversion constrained by OBS receiver function reveals crustal structure in Ryukyu Trench |
| title_full_unstemmed | Gravity inversion constrained by OBS receiver function reveals crustal structure in Ryukyu Trench |
| title_short | Gravity inversion constrained by OBS receiver function reveals crustal structure in Ryukyu Trench |
| title_sort | gravity inversion constrained by obs receiver function reveals crustal structure in ryukyu trench |
| topic | gravity inversion ocean bottom seismometer receiver function Ryukyu Trench H-κ stacking |
| url | https://www.frontiersin.org/articles/10.3389/feart.2023.1187683/full |
| work_keys_str_mv | AT tingweiyang gravityinversionconstrainedbyobsreceiverfunctionrevealscrustalstructureinryukyutrench AT tingweiyang gravityinversionconstrainedbyobsreceiverfunctionrevealscrustalstructureinryukyutrench AT yaxu gravityinversionconstrainedbyobsreceiverfunctionrevealscrustalstructureinryukyutrench AT yaxu gravityinversionconstrainedbyobsreceiverfunctionrevealscrustalstructureinryukyutrench AT yaxu gravityinversionconstrainedbyobsreceiverfunctionrevealscrustalstructureinryukyutrench AT nanqiaodu gravityinversionconstrainedbyobsreceiverfunctionrevealscrustalstructureinryukyutrench AT taoxu gravityinversionconstrainedbyobsreceiverfunctionrevealscrustalstructureinryukyutrench AT taoxu gravityinversionconstrainedbyobsreceiverfunctionrevealscrustalstructureinryukyutrench AT danpingcao gravityinversionconstrainedbyobsreceiverfunctionrevealscrustalstructureinryukyutrench AT fangzhounan gravityinversionconstrainedbyobsreceiverfunctionrevealscrustalstructureinryukyutrench AT fangzhounan gravityinversionconstrainedbyobsreceiverfunctionrevealscrustalstructureinryukyutrench AT fangzhounan gravityinversionconstrainedbyobsreceiverfunctionrevealscrustalstructureinryukyutrench AT weichu gravityinversionconstrainedbyobsreceiverfunctionrevealscrustalstructureinryukyutrench AT celiang gravityinversionconstrainedbyobsreceiverfunctionrevealscrustalstructureinryukyutrench AT tianyaohao gravityinversionconstrainedbyobsreceiverfunctionrevealscrustalstructureinryukyutrench AT tianyaohao gravityinversionconstrainedbyobsreceiverfunctionrevealscrustalstructureinryukyutrench AT tianyaohao gravityinversionconstrainedbyobsreceiverfunctionrevealscrustalstructureinryukyutrench |