Mario González-Escobar, Carlos Simón Reyes-Martínez, Cristian A. Gallegos-Castillo, Sergio M. Arregui-Ojeda, Edgar A. Mastache-Román
{"title":"变形断层沿线的盆地风格变化:墨西哥下加利福尼亚州南科罗拉多河三角洲","authors":"Mario González-Escobar, Carlos Simón Reyes-Martínez, Cristian A. Gallegos-Castillo, Sergio M. Arregui-Ojeda, Edgar A. Mastache-Román","doi":"10.1007/s00024-024-03561-6","DOIUrl":null,"url":null,"abstract":"<p>The Colorado River Delta is an example of a transtensional plate boundary defined by a series of en-echelon faults along the Gulf of California. Near the gulf’s mouth, the southern segment of the Cerro Prieto transform Fault (CPF) and the listric Pangas Viejas Fault (PVF) outline Montague Basin (MB), which contrasts with the pull-apart basins along the gulf’s axis. In this context, we present a series of seismic reflection profiles and known observations to illustrate the MB subsurface architecture. The imaging findings reveal concentrated deformation within the CPF and PVF regions, which exhibit a high density of faults perpendicular to the major faults. The imaging findings reveal concentrated deformation within the CPF and PVF regions, which exhibit a high density of faults perpendicular to the major faults. At the same time, in the central part of the basin, the seismoreflectors appear largely unaltered and only slightly tilted. The MB covers an area of approximately 250 km<sup>2</sup>, with a length of around 90 km and a width of 30 km between the CPF to the east and the PVF to the west. Based on the data resolution, the basin's depth is believed to be over 5 km. The acoustic basement appears only on the west side of the basin, around 4 km deep. Other important observations include the Yurimori Fault running parallel to the PVF showing significant deformation at the basement level, as well as the Ometepec and La Salina Faults in the southwest oblique to the CPF, which could be the structural link with the Wagner Basin in the Gulf of California. Historical seismicity and one particular seismic profile indicate that deformation in the Indiviso fault occurred before the El Mayor-Cucapah earthquake (2010, Mw 7.2). Although the connection with the gulf’s basins is uncertain, a slight gravimetric high striking NE is observed; this is interpreted as a strike-slip zone, suggesting that the MB could become an overlap gap between marine and terrestrial basins. Our findings provide various controls for fault linkage in a transtensional setting in which continental and oceanic basins interact.</p>","PeriodicalId":21078,"journal":{"name":"pure and applied geophysics","volume":null,"pages":null},"PeriodicalIF":1.9000,"publicationDate":"2024-09-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Basin Style Variation Along a Transform Fault: Southern Colorado River Delta, Baja California, México\",\"authors\":\"Mario González-Escobar, Carlos Simón Reyes-Martínez, Cristian A. Gallegos-Castillo, Sergio M. Arregui-Ojeda, Edgar A. Mastache-Román\",\"doi\":\"10.1007/s00024-024-03561-6\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<p>The Colorado River Delta is an example of a transtensional plate boundary defined by a series of en-echelon faults along the Gulf of California. Near the gulf’s mouth, the southern segment of the Cerro Prieto transform Fault (CPF) and the listric Pangas Viejas Fault (PVF) outline Montague Basin (MB), which contrasts with the pull-apart basins along the gulf’s axis. In this context, we present a series of seismic reflection profiles and known observations to illustrate the MB subsurface architecture. The imaging findings reveal concentrated deformation within the CPF and PVF regions, which exhibit a high density of faults perpendicular to the major faults. The imaging findings reveal concentrated deformation within the CPF and PVF regions, which exhibit a high density of faults perpendicular to the major faults. At the same time, in the central part of the basin, the seismoreflectors appear largely unaltered and only slightly tilted. The MB covers an area of approximately 250 km<sup>2</sup>, with a length of around 90 km and a width of 30 km between the CPF to the east and the PVF to the west. Based on the data resolution, the basin's depth is believed to be over 5 km. The acoustic basement appears only on the west side of the basin, around 4 km deep. Other important observations include the Yurimori Fault running parallel to the PVF showing significant deformation at the basement level, as well as the Ometepec and La Salina Faults in the southwest oblique to the CPF, which could be the structural link with the Wagner Basin in the Gulf of California. Historical seismicity and one particular seismic profile indicate that deformation in the Indiviso fault occurred before the El Mayor-Cucapah earthquake (2010, Mw 7.2). Although the connection with the gulf’s basins is uncertain, a slight gravimetric high striking NE is observed; this is interpreted as a strike-slip zone, suggesting that the MB could become an overlap gap between marine and terrestrial basins. Our findings provide various controls for fault linkage in a transtensional setting in which continental and oceanic basins interact.</p>\",\"PeriodicalId\":21078,\"journal\":{\"name\":\"pure and applied geophysics\",\"volume\":null,\"pages\":null},\"PeriodicalIF\":1.9000,\"publicationDate\":\"2024-09-08\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"pure and applied geophysics\",\"FirstCategoryId\":\"89\",\"ListUrlMain\":\"https://doi.org/10.1007/s00024-024-03561-6\",\"RegionNum\":4,\"RegionCategory\":\"地球科学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q2\",\"JCRName\":\"GEOCHEMISTRY & GEOPHYSICS\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"pure and applied geophysics","FirstCategoryId":"89","ListUrlMain":"https://doi.org/10.1007/s00024-024-03561-6","RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"GEOCHEMISTRY & GEOPHYSICS","Score":null,"Total":0}
Basin Style Variation Along a Transform Fault: Southern Colorado River Delta, Baja California, México
The Colorado River Delta is an example of a transtensional plate boundary defined by a series of en-echelon faults along the Gulf of California. Near the gulf’s mouth, the southern segment of the Cerro Prieto transform Fault (CPF) and the listric Pangas Viejas Fault (PVF) outline Montague Basin (MB), which contrasts with the pull-apart basins along the gulf’s axis. In this context, we present a series of seismic reflection profiles and known observations to illustrate the MB subsurface architecture. The imaging findings reveal concentrated deformation within the CPF and PVF regions, which exhibit a high density of faults perpendicular to the major faults. The imaging findings reveal concentrated deformation within the CPF and PVF regions, which exhibit a high density of faults perpendicular to the major faults. At the same time, in the central part of the basin, the seismoreflectors appear largely unaltered and only slightly tilted. The MB covers an area of approximately 250 km2, with a length of around 90 km and a width of 30 km between the CPF to the east and the PVF to the west. Based on the data resolution, the basin's depth is believed to be over 5 km. The acoustic basement appears only on the west side of the basin, around 4 km deep. Other important observations include the Yurimori Fault running parallel to the PVF showing significant deformation at the basement level, as well as the Ometepec and La Salina Faults in the southwest oblique to the CPF, which could be the structural link with the Wagner Basin in the Gulf of California. Historical seismicity and one particular seismic profile indicate that deformation in the Indiviso fault occurred before the El Mayor-Cucapah earthquake (2010, Mw 7.2). Although the connection with the gulf’s basins is uncertain, a slight gravimetric high striking NE is observed; this is interpreted as a strike-slip zone, suggesting that the MB could become an overlap gap between marine and terrestrial basins. Our findings provide various controls for fault linkage in a transtensional setting in which continental and oceanic basins interact.
期刊介绍:
pure and applied geophysics (pageoph), a continuation of the journal "Geofisica pura e applicata", publishes original scientific contributions in the fields of solid Earth, atmospheric and oceanic sciences. Regular and special issues feature thought-provoking reports on active areas of current research and state-of-the-art surveys.
Long running journal, founded in 1939 as Geofisica pura e applicata
Publishes peer-reviewed original scientific contributions and state-of-the-art surveys in solid earth and atmospheric sciences
Features thought-provoking reports on active areas of current research and is a major source for publications on tsunami research
Coverage extends to research topics in oceanic sciences
See Instructions for Authors on the right hand side.