A cold seep triggered by a hot ridge subduction
Abstract The Chile Triple Junction, where the hot active spreading centre of the Chile Rise system subducts beneath the South American plate, offers a unique opportunity to understand the influence of the anomalous thermal regime on an otherwise cold continental margin. Integrated analysis of variou...
| Main Authors: | , , , , , , , , , , , , , |
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| Format: | Article |
| Language: | English |
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Nature Portfolio
2021-10-01
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| Series: | Scientific Reports |
| Online Access: | https://doi.org/10.1038/s41598-021-00414-3 |
| _version_ | 1818836925697490944 |
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| author | Lucía Villar-Muñoz Masataka Kinoshita Joaquim P. Bento Ivan Vargas-Cordero Eduardo Contreras-Reyes Umberta Tinivella Michela Giustiniani Natsue Abe Ryo Anma Yuji Orihashi Hikaru Iwamori Tomoaki Nishikawa Eugenio Andres Veloso Satoru Haraguchi |
| author_facet | Lucía Villar-Muñoz Masataka Kinoshita Joaquim P. Bento Ivan Vargas-Cordero Eduardo Contreras-Reyes Umberta Tinivella Michela Giustiniani Natsue Abe Ryo Anma Yuji Orihashi Hikaru Iwamori Tomoaki Nishikawa Eugenio Andres Veloso Satoru Haraguchi |
| author_sort | Lucía Villar-Muñoz |
| collection | DOAJ |
| description | Abstract The Chile Triple Junction, where the hot active spreading centre of the Chile Rise system subducts beneath the South American plate, offers a unique opportunity to understand the influence of the anomalous thermal regime on an otherwise cold continental margin. Integrated analysis of various geophysical and geological datasets, such as bathymetry, heat flow measured directly by thermal probes and calculated from gas hydrate distribution limits, thermal conductivities, and piston cores, have improved the knowledge about the hydrogeological system. In addition, rock dredging has evidenced the volcanism associated with ridge subduction. Here, we argue that the localized high heat flow over the toe of the accretionary prism results from fluid advection promoted by pressure-driven discharge (i.e., dewatering/discharge caused by horizontal compression of accreted sediments) as reported previously. However, by computing the new heat flow values with legacy data in the study area, we raise the assumption that these anomalous heat flow values are also promoted by the eastern flank of the currently subducting Chile Rise. Part of the rift axis is located just below the toe of the wedge, where active deformation and vigorous fluid advection are most intense, enhanced by the proximity of the young volcanic chain. Our results provide valuable information to current and future studies related to hydrothermal circulation, seismicity, volcanism, gas hydrate stability, and fluid venting in this natural laboratory. |
| first_indexed | 2024-12-19T03:14:21Z |
| format | Article |
| id | doaj.art-588d11184e414767805dbc526af009df |
| institution | Directory Open Access Journal |
| issn | 2045-2322 |
| language | English |
| last_indexed | 2024-12-19T03:14:21Z |
| publishDate | 2021-10-01 |
| publisher | Nature Portfolio |
| record_format | Article |
| series | Scientific Reports |
| spelling | doaj.art-588d11184e414767805dbc526af009df2022-12-21T20:37:56ZengNature PortfolioScientific Reports2045-23222021-10-0111111410.1038/s41598-021-00414-3A cold seep triggered by a hot ridge subductionLucía Villar-Muñoz0Masataka Kinoshita1Joaquim P. Bento2Ivan Vargas-Cordero3Eduardo Contreras-Reyes4Umberta Tinivella5Michela Giustiniani6Natsue Abe7Ryo Anma8Yuji Orihashi9Hikaru Iwamori10Tomoaki Nishikawa11Eugenio Andres Veloso12Satoru Haraguchi13Departamento de Geofísica, Facultad de Ciencias Físicas y Matemáticas, Universidad de ChileEarthquake Research Institute, The University of TokyoEscuela de Ciencias del Mar, Pontificia Universidad Católica de ValparaísoIstituto Nazionale di Oceanografia e di Geofisica Sperimentale - OGSDepartamento de Geofísica, Facultad de Ciencias Físicas y Matemáticas, Universidad de ChileIstituto Nazionale di Oceanografia e di Geofisica Sperimentale - OGSIstituto Nazionale di Oceanografia e di Geofisica Sperimentale - OGSMantle Drilling Promotion Office, MarE3, Japan Agency for Marine-Earth Science and Technology (JAMSTEC)Graduate School of Technology, Industrial and Social Sciences, Tokushima UniversityGlobal Environment and Disaster Prevention, Graduate School of Science and Engineering, Hirosaki UniversityEarthquake Research Institute, The University of TokyoDisaster Prevention Research Institute, Kyoto UniversityAndean Geothermal Center of Excellence (CEGA)Earthquake Research Institute, The University of TokyoAbstract The Chile Triple Junction, where the hot active spreading centre of the Chile Rise system subducts beneath the South American plate, offers a unique opportunity to understand the influence of the anomalous thermal regime on an otherwise cold continental margin. Integrated analysis of various geophysical and geological datasets, such as bathymetry, heat flow measured directly by thermal probes and calculated from gas hydrate distribution limits, thermal conductivities, and piston cores, have improved the knowledge about the hydrogeological system. In addition, rock dredging has evidenced the volcanism associated with ridge subduction. Here, we argue that the localized high heat flow over the toe of the accretionary prism results from fluid advection promoted by pressure-driven discharge (i.e., dewatering/discharge caused by horizontal compression of accreted sediments) as reported previously. However, by computing the new heat flow values with legacy data in the study area, we raise the assumption that these anomalous heat flow values are also promoted by the eastern flank of the currently subducting Chile Rise. Part of the rift axis is located just below the toe of the wedge, where active deformation and vigorous fluid advection are most intense, enhanced by the proximity of the young volcanic chain. Our results provide valuable information to current and future studies related to hydrothermal circulation, seismicity, volcanism, gas hydrate stability, and fluid venting in this natural laboratory.https://doi.org/10.1038/s41598-021-00414-3 |
| spellingShingle | Lucía Villar-Muñoz Masataka Kinoshita Joaquim P. Bento Ivan Vargas-Cordero Eduardo Contreras-Reyes Umberta Tinivella Michela Giustiniani Natsue Abe Ryo Anma Yuji Orihashi Hikaru Iwamori Tomoaki Nishikawa Eugenio Andres Veloso Satoru Haraguchi A cold seep triggered by a hot ridge subduction Scientific Reports |
| title | A cold seep triggered by a hot ridge subduction |
| title_full | A cold seep triggered by a hot ridge subduction |
| title_fullStr | A cold seep triggered by a hot ridge subduction |
| title_full_unstemmed | A cold seep triggered by a hot ridge subduction |
| title_short | A cold seep triggered by a hot ridge subduction |
| title_sort | cold seep triggered by a hot ridge subduction |
| url | https://doi.org/10.1038/s41598-021-00414-3 |
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