General description:This contribution includes magnetotelluric (MT) and gravity datasets used in the study of the Cañada David Detachment, a low-angle normal fault located in Baja California, Mexico. The study, authored by Balbuena et al. and submitted to the Journal of Geophysical Research: Solid Earth in 2025, investigates the crustal structure of the Laguna Salada rift basin and the subsurface geometry of the detachment fault.The magnetotelluric dataset comprises data from 30 sites collected during multiple field campaigns. These include data from a master’s thesis (Cortés Arroyo, 2011), two technical reports (Vázquez González et al., 1993, 1994), and 16 previously unpublished sites acquired in fall 2021. Provided files include: observed MT data, inversion results, resistivity models, and log files documenting the inversion process. These files are compatible with the 3D-GRID Model and Data Visualizer.The gravity dataset contains free-air anomaly data, combining 78 new measurements acquired in the Sierra Juárez region during 2021 with previously published data from Kelm (1971) and García-Abdeslem et al. (2001). The dataset includes a .GRD file of the free-air anomaly and .shp files marking the locations of gravity profiles A, B, and C.In the associated study, these geophysical datasets were used to evaluate alternative models of crustal structure and fault geometry. The preferred model suggests that the Cañada David Detachment exhibits a rolling-hinge geometry, with a flat surface trace transitioning into a steep ramp cutting through the upper and middle crust. The model is consistent with isostatic compensation through lower crustal flow toward areas of upper-crustal extension. Models featuring shallowly dipping detachments through the entire crust or those with strong mechanical coupling between crust and mantle exhibited significantly larger misfits against the data.

General description:This contribution includes magnetotelluric (MT) and gravity datasets used in the study of the Cañada David Detachment, a low-angle normal fault located in Baja California, Mexico. The study, authored by Balbuena et al. and submitted to the Journal of Geophysical Research: Solid Earth in 2025, investigates the crustal structure of the Laguna Salada rift basin and the subsurface geometry of the detachment fault.The magnetotelluric dataset comprises data from 30 sites collected during multiple field campaigns. These include data from a master’s thesis (Cortés Arroyo, 2011), two technical reports (Vázquez González et al., 1993, 1994), and 16 previously unpublished sites acquired in fall 2021. Provided files include: observed MT data, inversion results, resistivity models, and log files documenting the inversion process. These files are compatible with the 3D-GRID Model and Data Visualizer.The gravity dataset contains free-air anomaly data, combining 78 new measurements acquired in the Sierra Juárez region during 2021 with previously published data from Kelm (1971) and García-Abdeslem et al. (2001). The dataset includes a .GRD file of the free-air anomaly and .shp files marking the locations of gravity profiles A, B, and C.In the associated study, these geophysical datasets were used to evaluate alternative models of crustal structure and fault geometry. The preferred model suggests that the Cañada David Detachment exhibits a rolling-hinge geometry, with a flat surface trace transitioning into a steep ramp cutting through the upper and middle crust. The model is consistent with isostatic compensation through lower crustal flow toward areas of upper-crustal extension. Models featuring shallowly dipping detachments through the entire crust or those with strong mechanical coupling between crust and mantle exhibited significantly larger misfits against the data.