气候变化领域集成服务门户(CCPortal): Early Paleozoic structural and metamorphic evolution of the Transpatagonian Orogen related to Gondwana assembly

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DOI	10.1007/s00531-020-01939-0
	Early Paleozoic structural and metamorphic evolution of the Transpatagonian Orogen related to Gondwana assembly
	González P.D.; Naipauer M.; Sato A.M.; Varela R.; Basei M.A.S.; Cábana M.C.; Vlach S.R.F.; Arce M.; Parada M.
发表日期	2020
ISSN	14373254
英文摘要	The temporal and spatial relationships between polyphase folding and faulting, regional metamorphism, and granitoids intrusions are discussed for the low-grade basement rocks of the El Jagüelito Formation from the eastern North Patagonian Massif, Argentina, at the inferred western Gondwana margin. As a result of the tectonometamorphic and magmatic events, a late Cambrian-early Ordovician orogenic belt is revealed in northern Patagonia and shall be named the Transpatagonian orogen. It is an NW–SE-trending belt traced from the extra-Andean North Patagonian Cordillera region via the eastern North Patagonian Massif up to the Atlantic coast in the east. The early Paleozoic Transpatagonian orogen is the result of compressional tectonics, also showing a significant dextral shearing, and regional metamorphism leading to the development of a fold-and-thrust belt with an anticlockwise P–T–D-time path. The double-sided orogen is divided into three tectonometamorphic zones bounded by NW–SE trending major faults. Regional comparisons of our results in the present contribution together with available geological data, allow characterizing the orogen as part of a paired metamorphic belt system, with an outboard low-P/high-T belt (northern Patagonia terrane) and a parallel, inboard medium-P/T belt of Barrowian type (Famatinian Orogen on Gondwana margin), respectively. They are juxtaposed tectonically along with the contact of the suture Huincul Fault Zone. The Transpatagonian orogen was implanted along the southernmost Gondwana margin during the final stages of the supercontinent assembly in the early Paleozoic. The tectonism of the Permian Gondwanide orogeny reworked the Transpatagonian orogen. © 2020, Geologische Vereinigung e.V. (GV).
英文关键词	Anti-clockwise P–T-time path; Early Paleozoic; Fold-and-thrust belt; Low-grade metamorphism; Patagonia
语种	英语
来源期刊	International Journal of Earth Sciences
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/147761
作者单位	Instituto de Investigación en Paleobiología y Geología (UNRN-CONICET), Av. Julio A. Roca 1242, R 8332 EXZ, General Roca (Río Negro), Argentina; Instituto de Estudios Andinos “Don Pablo Groeber” (UBA-CONICET), Güiraldes 2160, Ciudad Universitaria, Pabellón II, C 1428 EHA, Ciudad Autónoma de Buenos Aires, Argentina; Centro de Investigaciones Geológicas (UNLP-CONICET), Diagonal 113 No 275, B 1904 DPK, La Plata (Buenos Aires), Argentina; Centro de Pesquisas Geocronológicas (CPGeo), Instituto de Geociências, Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq), Universidade de São Paulo, Cidade Universitária, Rua Do Lago 562, São Paulo, CEP 05508-080, Brazil; Universidad Nacional de Río Negro, Instituto de Investigación en Paleobiología y Geología, Geomatics Laboratory, Av. Julio A. Roca 1242. R 8332 EXZ, General Roca (Río Negro), Argentina; Universidad Nacional de Río Negro, Instituto de Investigación en Paleobiología y Geología, XRD and Electron Microscopy Laboratory, Av. Julio A. Roca 1242. ...
推荐引用方式 GB/T 7714	González P.D.,Naipauer M.,Sato A.M.,et al. Early Paleozoic structural and metamorphic evolution of the Transpatagonian Orogen related to Gondwana assembly[J],2020.
APA	González P.D..,Naipauer M..,Sato A.M..,Varela R..,Basei M.A.S..,...&Parada M..(2020).Early Paleozoic structural and metamorphic evolution of the Transpatagonian Orogen related to Gondwana assembly.International Journal of Earth Sciences.
MLA	González P.D.,et al."Early Paleozoic structural and metamorphic evolution of the Transpatagonian Orogen related to Gondwana assembly".International Journal of Earth Sciences (2020).