The subducted Rivera-Cocos plate boundary: where is it, what is it, and what is its relationship to the Colima Rift?
Por:
Bandy W., Mortera-Gutierrez C., Urrutia-Fucugauchi J., Hilde T.W.C.
Publicada:
1 ene 1995
Resumen:
Gravity data, the geometry of the Wadati-Benioff zone beneath western Mexico, and the seafloor morphology of the Rivera-Cocos plate boundary west of the Middle America trench suggest that the subducted part of this boundary lies directly beneath and is oriented parallel to the Southern Colima rift. Thus, the Southern Colima rift likely formed in response to divergence between the subducting Rivera and Cocos plates due to direct coupling between these two plates and the overriding North American plate. In contrast, the subducted plate boundary lies east of and oblique to the Northern Colima and Central Colima grabens. These characteristics along with the adjacent locations of the low density upper mantle and the Central Colima graben are consistent with crustal extension produced by the uniform-sense normal simple shear mechanism. -from Authors
Filiaciones:
Bandy W.:
Instituto de Geofísica, UNAM, Mexico
Mortera-Gutierrez C.:
Geodynamics Research Institute, Texas A&M University, United States
Urrutia-Fucugauchi J.:
Instituto de Geofísica, UNAM, Mexico
Hilde T.W.C.:
Geodynamics Research Institute, Texas A&M University, United States
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