By J. Duncan Keppie, J. Brendan Murphy, F. Ortega-Gutierrez, W. G. Ernst
Together with papers that experience seemed lately in overseas Geology assessment, heart American Terranes, strength Correlatives, and Orogenic methods makes a speciality of heart American terranes during which tectonic tactics, together with flat-slab subduction, for orogenic improvement are tested at numerous instances because the past due Mesoproterozoic: at 1 Ga, during the Paleozoic, and into the Cenozoic. Many papers relate the evolution of the center American terranes during the last billion years to international scale occasions, and a moment subject matter working in the course of the ebook pertains to the supercontinents, Rodinia and Pangea, the geometry in their amalgamation and breakup, and the approaches dependable. Highlights contain: · An replace at the geographic checklist, tectonic environment, and provenance of those terranes · Documentation of allocthonous nature and place peripheral to Amazonia of the ~1 Ga basement of southern Mexico · information demonstrating that the basement rocks have been focused on a number of Phanerozoic tectonic occasions · An exam of latest facts of a overdue Paleozoic occasion linked to the amalgamation of Pangea overprinting the ~1 Ga basement and the Paleozoic devices mendacity mainly to the west and south of it · An exploration of the subsequent strength correlatives: (1) occasions in Europe at the northern margin of Gondwana; (2) the past due Silurian-Devonian Acadian orogeny within the Appalachian, that is inferred to have resulted from flat-slab subduction on the topic of overriding a plume; and (3) Mesozoic-Cenozoic occasions alongside the western margin of Laurentia · A dialogue of attainable mechanisms for the initiation of orogeny, flat-slab subduction within the Laramide orogeny, and hypotheses in relation to the amalgamation and breakup of supercontinents the mix of revered members, professional editorial information, and assurance of present and rising theories makes this booklet a vital source for figuring out the evolution of the terranes constituting center the USA.
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Extra resources for Middle American Terranes, Potential Correlatives, and Orogenic Processes
2003b). Abbreviations and symbols are the same as in Figures 8–10. Chortis terrane. , 1995; Keppie and Ramos, 1999). However, an alternative reconstruction using the Cayman transform results in back-rotation of the Chortis terrane into the Pacific Ocean, so that in the Eocene the southern Mexican coast would have faced an open ocean (Keppie and Moran-Zenteno, 2004). , 1996). On the other hand, there appear to be pre-Cenozoic connections between southern Mexico and the Chortis terrane. , 2003a).
2. 1 Ga by migmatization, and at ~1012 Ma by renewed AMCG, rift-related plutons, all possibly occurring in a backarc setting as the trench migrated seaward leading to the birth of the Avalonian primitive island arc outboard of Middle America (Figs. , 2003a). TERRANES OF MEXICO 27 FIG. 19. 45 Ma to Present reconstruction showing rotation of the Chortis terrane to its present position contemporaneous with NE migration of the subduction zone, and tectonic erosion of the southern coast of Mexico (modified after Keppie and Moran-Zenteno, 2004).
2002, Nuevas edades de granitoides metamorfizados del Complejo Acatlán en el Estado de Guerrero: Actas Instituto Nacional de Geoquímica, v. 8, No. 1, p. 248. , 1983, Les ensembles géologiques du Mexique meridional: Evolution géodynamique durante le Mésozoïque et le Cénozoique: Geofisica Internacional, v. 22, p. 9–37. , 1991, Geología del anticlinorio de Huizachal-Peregrina al N-W de Ciudad Victoria, Tamaulipas: Asociación Mexicana de Geólogos Petrolleros Boletín, v. 13, p. 1–98. , 1988, Zur des kristallinen Grundgebirges der Sierra Madre Oriental-insbesondere des Granjero-Schiefer-Komplexes-im Sudteil des Huizchal-Peregrina-Antiklinoriums (Raum Ciudad Victoria, Bundestaat Tamaulipas, Mexiko): Unpubl.