Jurnal Internasional Sejarah dinamis 220 juta tahun subduksi di bawah Meksiko: korelasi antara geometri lempengan dan deformasi lempeng yang berlebihan berdasarkan geologi, paleomagnetisme dan tomografi seismik – Boschman – – Geokimia, Geofisika, Geosystems

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Jurnal Internasional Sejarah dinamis 220 juta tahun subduksi di bawah Meksiko: korelasi antara geometri lempengan dan deformasi lempeng yang berlebihan berdasarkan geologi, paleomagnetisme dan tomografi seismik – Boschman – – Geokimia, Geofisika, Geosystems

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Global tectonic reconstruction of pre-Cenozoic plate movements relies heavily on paleomagnetic and geological data from continents, and uncertainty increases significantly by deepening geological time. In an effort to improve plate kinematic reconstruction for a long time, restoring lost oceanic plates through the use of geological and seismic tomography for past subduction is the key. The North American Cordillera holds the record for subduction of oceanic plates that make up the northeast Panthalassa Sea, the vast ocean area around Pangea in Mesozoic times. Here, we present new paleomagnetic data from subduction rock collections associated with the Vizcaíno Peninsula of Baja California, Mexico, which yields the same history of movement of the paleolatitudinal plate as the North American continent since the Late Triassic period. This shows that the bedrock of the Vizcaíno Peninsula formed at the forefront of the North American Plate, adjacent to subduction, heading eastward in the southern part of the western margin of North America. The long-lived, eastern subduction uninterrupted tomographic images. We correlated episodes of plate shortening and extension to the flat and steep segments of the imaged slab. By integrating evidence of paleomagnetic, geological, and tomographic, we provide a first-order model that reconciles the motion of the North American plate and the history of Mexican deformation since the End of the Trias with the modern slab structure.

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