Palaeomagnetic assessment of plutons from the southern Peninsular Ranges batholith and the Jurassic Vizcaíno igneous suites, Baja California, México

Torres-Carrillo, Xochitl G.; Delgado-Argote, Luis Alberto; Böhnel, Harald; Molina-Garza, Roberto S.; Weber, Bodo

doi:10.1080/00206814.2015.1089425

Cited by 13 publications

(4 citation statements)

References 61 publications

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“…Therefore, there are two possible solutions representing paleolatitudes just north or just south of the equator, with opposite rotations. Clockwise declinations are in line with directions from SH4–SH7 and declinations from the San Roque pluton reported by Torres‐Carrillo et al (; see below), which we therefore consider the most likely option. We reversed the polarity of PA1‐4, and we combined the directions of both localities for the calculation of a single paleomagnetic pole (Figure h).…”

Section: Paleomagnetic Resultssupporting

confidence: 76%

“…The complex contains gabbroic‐to‐granodioritic intrusions, andesite lavas, and breccia and pillow lavas, interbedded with volcaniclastic sandstone, conglomerate, and breccia (Kimbrough & Moore, ). K‐Ar (hornblende, biotite) and U‐Pb (zircon) ages from plutonic rocks range from ~160 to 135 Ma (Barnes, , 1984; Kimbrough & Moore, ; Torres‐Carrillo et al, ; Troughton, ). The volcanic rocks in the Sierra de San Andres have island arc tholeiitic and boninitic geochemical affinities (Moore, ), and the volcaniclastic rocks are interpreted as proximal coarse‐grained debris aprons deposited along a steep volcanic slope (Moore, ).…”

Section: Geological Settingmentioning

confidence: 99%

“…Paleomagnetic database of the Vizcaíno-Cedros region, including data fromHagstrum et al (1985; H), Patterson (1984; P1-P7),Smith and Busby (1993;S), Torres-Carrillo et al (2016;,Vaughn et al (2005;, and this study (SH4-SH7, PA, and BT). (a) Paleolatitudes.…”

mentioning

confidence: 97%

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The Dynamic History of 220 Million Years of Subduction Below Mexico: A Correlation Between Slab Geometry and Overriding Plate Deformation Based on Geology, Paleomagnetism, and Seismic Tomography

Boschman

Hinsbergen

Kimbrough

et al. 2018

Geochem Geophys Geosyst

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Global tectonic reconstructions of pre‐Cenozoic plate motions rely primarily on paleomagnetic and geological data from the continents, and uncertainties increase significantly with deepening geological time. In attempting to improve such deep‐time plate kinematic reconstructions, restoring lost oceanic plates through the use of geological and seismic tomographical evidence for past subduction is key. The North American Cordillera holds a record of subduction of oceanic plates that composed the northeastern Panthalassa Ocean, the large oceanic realm surrounding Pangea in Mesozoic times. Here we present new paleomagnetic data from subduction‐related rock assemblages of the Vizcaíno Peninsula of Baja California, Mexico, which yield a paleolatitudinal plate motion history equal to that of the North American continent since Late Triassic time. This indicates that the basement rocks of the Vizcaíno Peninsula formed in the forearc of the North American Plate, adjacent to long‐lived eastward dipping subduction at the southern part of the western North American continental margin. Tomographic images confirm long‐lived, uninterrupted eastward subduction. We correlate episodes of overriding plate shortening and extension to flat and steep segments of the imaged slab. By integrating paleomagnetic, geological, and tomographic evidence, we provide a first‐order model that reconciles absolute North American plate motion and the deformation history of Mexico since Late Triassic time with modern slab structure.

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Section: Paleomagnetic Resultssupporting

confidence: 76%

Section: Geological Settingmentioning

confidence: 99%

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The Dynamic History of 220 Million Years of Subduction Below Mexico: A Correlation Between Slab Geometry and Overriding Plate Deformation Based on Geology, Paleomagnetism, and Seismic Tomography

Boschman

Hinsbergen

Kimbrough

et al. 2018

Geochem Geophys Geosyst

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“…The complex contains gabbroic-to-granodioritic intrusions, andesite lavas, and breccia and pillow lavas, interbedded with volcaniclastic sandstone, conglomerate, and breccia (Kimbrough & Moore, 2003). K-Ar (hornblende, biotite) and U-Pb (zircon) ages from plutonic rocks range from~160 to 135 Ma (Barnes, 1982(Barnes, , 1984Kimbrough & Moore, 2003;Torres-Carrillo et al, 2016;Troughton, 1974). The volcanic rocks in the Sierra de San Andres have island arc tholeiitic and boninitic geochemical affinities (Moore, 1983), and the volcaniclastic rocks are interpreted as proximal coarse-grained debris aprons deposited along a steep volcanic slope (Moore, 1984).…”

Section: Geology Of the Vizcaino Peninsulamentioning

confidence: 99%

The Dynamic History of 220 Million Years of Subduction Below Mexico: A Correlation Between Slab Geometry and Overriding Plate Deformation Based on Geology, Paleomagnetism, and Seismic Tomography

Boschman

2020

Geological Society of America Abstracts With Programs

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Global tectonic reconstructions of pre-Cenozoic plate motions rely primarily on paleomagnetic and geological data from the continents, and uncertainties increase significantly with deepening geological time. In attempting to improve such deep-time plate kinematic reconstructions, restoring lost oceanic plates through the use of geological and seismic tomographical evidence for past subduction is key. The North American Cordillera holds a record of subduction of oceanic plates that composed the northeastern Panthalassa Ocean, the large oceanic realm surrounding Pangea in Mesozoic times. Here we present new paleomagnetic data from subduction-related rock assemblages of the Vizcaíno Peninsula of Baja California, Mexico, which yield a paleolatitudinal plate motion history equal to that of the North American continent since Late Triassic time. This indicates that the basement rocks of the Vizcaíno Peninsula formed in the forearc of the North American Plate, adjacent to long-lived eastward dipping subduction at the southern part of the western North American continental margin. Tomographic images confirm long-lived, uninterrupted eastward subduction. We correlate episodes of overriding plate shortening and extension to flat and steep segments of the imaged slab. By integrating paleomagnetic, geological, and tomographic evidence, we provide a first-order model that reconciles absolute North American plate motion and the deformation history of Mexico since Late Triassic time with modern slab structure. Plain Language Summary Reconstruction of deep-time global tectonic plate motions relies primarily on data derived from the rock record of the continents, as the vast majority of pre-Cenozoic oceanic crust has been recycled into the Earth's mantle in subduction zones. To improve deep-time plate tectonic reconstructions, adding information on the plate motions and the geometry of lost oceanic plates is therefore key. In this study, we attempt at reconstructing the subduction of oceanic plates of the eastern Panthalassa Ocean, which surrounded the supercontinent Pangea. We present new paleomagnetic data from the geological record of the Vizcaíno Peninsula of central Baja California and conclude that the Vizcaíno peninsula has since~220 Ma been part of the North American Plate below which the Panthalassa plates subducted. Furthermore, we analyze mantle tomographic images, illustrating the presence of an extraordinary long anomaly interpreted as subducted lithosphere. By integrating geological, paleomagnetic, and seismic tomographic data, we present a model that reconciles absolute North American plate motion and the deformation history of Mexico since the Triassic with modern slab structure.

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Phase equilibrium modelling of the amphibolite facies metamorphism in the Yelapa-Chimo Metamorphic Complex, Mexico

Gutiérrez-Aguilar¹,

Schaaf²,

Solís‐Pichardo³

et al. 2021

Geoscience Frontiers

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Palaeomagnetic assessment of plutons from the southern Peninsular Ranges batholith and the Jurassic Vizcaíno igneous suites, Baja California, México

Cited by 13 publications

References 61 publications

The Dynamic History of 220 Million Years of Subduction Below Mexico: A Correlation Between Slab Geometry and Overriding Plate Deformation Based on Geology, Paleomagnetism, and Seismic Tomography

The Dynamic History of 220 Million Years of Subduction Below Mexico: A Correlation Between Slab Geometry and Overriding Plate Deformation Based on Geology, Paleomagnetism, and Seismic Tomography

The Dynamic History of 220 Million Years of Subduction Below Mexico: A Correlation Between Slab Geometry and Overriding Plate Deformation Based on Geology, Paleomagnetism, and Seismic Tomography

Phase equilibrium modelling of the amphibolite facies metamorphism in the Yelapa-Chimo Metamorphic Complex, Mexico

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