The Gondwana Orogeny in northern North Patagonian Massif:Evidences from the Caita Có granite, La Se?a and Pangaré mylonites,Argentina  

作　　者：Daniel A.Gregori Bernhardt Saini-Eidukat Leonardo Benedini Leonardo Strazzere Mercedes Barros José Kostadinoff 

机构地区：[1]Cátedra de Geología Argentina, Departamento de Geología, Universidad Nacional del Sur and INGEOSUR [2]Department of Geosciences, North Dakota State University [3]Cátedra de Campos Gravitacionales, Departamento de Física, Universidad Nacional del Sur

出　　处：《Geoscience Frontiers》2016年第4期621-638,共18页地学前缘（英文版）

基　　金：part of the research project"Configuración Geológica y Geodinámica del sector central de la Comarca Nordpatagónica,Argentina"(24/H100)granted by the Universidad Nacional del Sur;"La Orogenia Gondwánica en el sector central de la Comarca Nordpatagónica"(11420090100108)granted by CONICET

摘　　要：Structural analyses in the northern part of the North Patagonia Massif, in the foliated Caita Co granite and in La Sefia and Pangare mylonites, indicate that the pluton was intruded as a sheet-like body into an opening pull-apart structure during the Gondwana Orogeny. Geochronological studies in the massif indicate a first, lower to middle Permian stage of regional deformation, related to movements during indentation tectonics, with emplacement of foliated granites in the western and central areas of the North Patagonian Massif. Between the upper Permian and lower Triassic, evidence indicates emplacement of undeformed granitic bodies in the central part of the North Patagonian Massif. A second pulse of deformation between the middle and upper Triassic is related to the emplacement of the Caita CO granite, the development of mylonitic belts, and the opening of the Los Menucos Basin. During this pulse of deformation, compression direction was from the eastern quadrant.Structural analyses in the northern part of the North Patagonia Massif, in the foliated Caita Co granite and in La Sefia and Pangare mylonites, indicate that the pluton was intruded as a sheet-like body into an opening pull-apart structure during the Gondwana Orogeny. Geochronological studies in the massif indicate a first, lower to middle Permian stage of regional deformation, related to movements during indentation tectonics, with emplacement of foliated granites in the western and central areas of the North Patagonian Massif. Between the upper Permian and lower Triassic, evidence indicates emplacement of undeformed granitic bodies in the central part of the North Patagonian Massif. A second pulse of deformation between the middle and upper Triassic is related to the emplacement of the Caita CO granite, the development of mylonitic belts, and the opening of the Los Menucos Basin. During this pulse of deformation, compression direction was from the eastern quadrant.

关 键 词：Gondwana Orogeny Northern Patagonia Foliated granite MYLONITES ARGENTINA 

分 类 号：P542[天文地球—构造地质学]