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Takada A. The influence of regional stress and magmatic input on styles of monogenetic and polygenetic volcanism. ACTA ACUST UNITED AC 2012. [DOI: 10.1029/94jb00494] [Citation(s) in RCA: 135] [Impact Index Per Article: 11.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Andreani L, Le Pichon X, Rangin C, Martínez-Reyes J. The southern Mexico block: main boundaries and new estimation for its Quaternary motion. ACTA ACUST UNITED AC 2008. [DOI: 10.2113/gssgfbull.179.2.209] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Abstract
AbstractNumerous studies, mainly based on structural and paleomagnetic data, consider southern Mexico as a crustal block (southern Mexico block, SMB) uncoupled from the North American plate with a southeast motion with respect to North America, accommodated by extension through the central Trans-Mexican volcanic belt (TMVB). On the other hand, the accommodation of this motion on the southeastward boundary, especially at the Cocos–Caribbean–North American triple junction, is still debated.The boundary between the SMB and the North American plate is constituted by three connected zones of deformation: (1) left-lateral transtension across the central TMVB, (2) left-lateral strike-slip faulting along the eastern TMVB and Veracruz area and (3) reverse and left-lateral strike-slip faulting in the Chiapas area. We show that these three active deformation zones accommodate a counterclockwise rotation of the SMB with respect to the North American plate. We specially discuss the Quaternary motion of the SMB with respect to the surrounding plates near the Cocos–Caribbean–North American triple junction. The model we propose predicts a Quaternary counterclockwise rotation of 0.45°/Ma with a pole located at 24.2°N and 91.8°W.Finally we discuss the geodynamic implications of this counterclockwise rotation. The southern Mexico block motion is generally assumed to be the result of slip partitioning at the trench. However the obliquity of the subduction is too small to explain slip partitioning. The motion could be facilitated by the high thermal gradient and gravitational collapse that affects central Mexico and/or by partial coupling with the eastward motion of the Caribbean plate.
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Affiliation(s)
- Louis Andreani
- Collège de France, Chaire de Géodynamique, Europôle de l’Arbois, Bâtiment Trocadéro, BP 80, 13545 Aix-en-Provence, France
| | - Xavier Le Pichon
- Collège de France, Chaire de Géodynamique, Europôle de l’Arbois, Bâtiment Trocadéro, BP 80, 13545 Aix-en-Provence, France
- CNRS-UMR 6635
| | - Claude Rangin
- Collège de France, Chaire de Géodynamique, Europôle de l’Arbois, Bâtiment Trocadéro, BP 80, 13545 Aix-en-Provence, France
- CNRS-UMR 6635
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Langridge RM, Weldon RJ, Moya JC, Suárez G. Paleoseismology of the 1912 Acambay earthquake and the Acambay-Tixmadejé fault, Trans-Mexican Volcanic Belt. ACTA ACUST UNITED AC 2000. [DOI: 10.1029/1999jb900239] [Citation(s) in RCA: 50] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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