Crustal structure from 2-D gravity and magnetic data modeling, magnetic power spectrum inversion, and seismotectonics in the Laguna Salada basin, northern Baja California, Mexico
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| Format: | Artículo científico |
| Langue: | en |
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Universidad Nacional Autónoma de México
2001
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| _version_ | 1876435678934335488 |
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| author | Juan García Abdeslem |
| author_facet | Juan García Abdeslem |
| contents | Crustal structure from 2-D gravity and magnetic data modeling, magnetic power spectrum inversion, and seismotectonics in the Laguna Salada basin, northern Baja California, Mexico Juan García Abdeslem Juan Manuel Espinosa Cardeña Luis Munguía Orozco Víctor Manuel Wong Ortega Jorge Ramírez Hernández Ciencias de la Tierra México gravity magnetic D modeling Baja California We have constructed a 2-D model of the crustal structure that accounts for gravity and aeromagnetic data across the LagunaSalada basin, using independent inferences from seismic refraction studies and the Airy-Heiskanen model of isostatic compensation,mass density and magnetic susceptibility measurements, a mass density-log from a well, and inversion of the power spectrumfrom magnetic anomalies. The model suggests that the Sierra Juárez root extends down to about 42 km depth. The crust-mantleinterface is at about 25 km depth in the Laguna Salada basin, the Sierra Cucapá, and the western side of the Mexicali valley. Thebase of magnetized crust is at about 16 km depth under the Sierra Cucapá. The geometry of the basin suggests a half-grabenstructure dipping eastward. The maximum sedimentary fill is about 3 km thick. The seismogenic zone is about 20 km thick, ingood agreement with the depth to the base of the crustal magnetic layer. In the Laguna Salada basin, clusters of events indicatezones of weakness. Hypocenter depths were confined at a depth of up to 19.6 km, being deeper at the margins of Laguna Saladabasin. The seismicity pattern correlates well with the regional fault system. Focal mechanisms suggest transtensional deformationin agreement with the regional tectonic framework. 2001 artículo científico 0016-7169 https://www.redalyc.org/articulo.oa?id=56840201 en http://www.redalyc.org/revista.oa?id=568 Geofísica Internacional application/pdf Universidad Nacional Autónoma de México Geofísica Internacional (México) Num.2 Vol.40 |
| format | Artículo científico |
| id | redalyc_56840201 |
| institution | Redalyc |
| language | en |
| publishDate | 2001 |
| publisher | Universidad Nacional Autónoma de México |
| spellingShingle | Crustal structure from 2-D gravity and magnetic data modeling, magnetic power spectrum inversion, and seismotectonics in the Laguna Salada basin, northern Baja California, Mexico Juan García Abdeslem Ciencias de la Tierra México gravity magnetic D modeling Baja California Crustal structure from 2-D gravity and magnetic data modeling, magnetic power spectrum inversion, and seismotectonics in the Laguna Salada basin, northern Baja California, Mexico Juan García Abdeslem Juan Manuel Espinosa Cardeña Luis Munguía Orozco Víctor Manuel Wong Ortega Jorge Ramírez Hernández Ciencias de la Tierra México gravity magnetic D modeling Baja California We have constructed a 2-D model of the crustal structure that accounts for gravity and aeromagnetic data across the LagunaSalada basin, using independent inferences from seismic refraction studies and the Airy-Heiskanen model of isostatic compensation,mass density and magnetic susceptibility measurements, a mass density-log from a well, and inversion of the power spectrumfrom magnetic anomalies. The model suggests that the Sierra Juárez root extends down to about 42 km depth. The crust-mantleinterface is at about 25 km depth in the Laguna Salada basin, the Sierra Cucapá, and the western side of the Mexicali valley. Thebase of magnetized crust is at about 16 km depth under the Sierra Cucapá. The geometry of the basin suggests a half-grabenstructure dipping eastward. The maximum sedimentary fill is about 3 km thick. The seismogenic zone is about 20 km thick, ingood agreement with the depth to the base of the crustal magnetic layer. In the Laguna Salada basin, clusters of events indicatezones of weakness. Hypocenter depths were confined at a depth of up to 19.6 km, being deeper at the margins of Laguna Saladabasin. The seismicity pattern correlates well with the regional fault system. Focal mechanisms suggest transtensional deformationin agreement with the regional tectonic framework. 2001 artículo científico 0016-7169 https://www.redalyc.org/articulo.oa?id=56840201 en http://www.redalyc.org/revista.oa?id=568 Geofísica Internacional application/pdf Universidad Nacional Autónoma de México Geofísica Internacional (México) Num.2 Vol.40 |
| title | Crustal structure from 2-D gravity and magnetic data modeling, magnetic power spectrum inversion, and seismotectonics in the Laguna Salada basin, northern Baja California, Mexico |
| topic | Ciencias de la Tierra México gravity magnetic D modeling Baja California |
| url | https://www.redalyc.org/articulo.oa?id=56840201 |