North-directed Triassic nappes in Northeastern Vietnam (East Bac Bo)

doi:10.1016/j.jseaes.2011.01.002

	North-directed Triassic nappes in Northeastern Vietnam (East Bac Bo)
	Lepvrier, Claude 1; Faure, Michel 2; Vuong Nguyen Van 3; Tich Van Vu 3; Lin, Wei 4; Thang Ta Trong 3; Phuong Ta Hoa 3
刊名	JOURNAL OF ASIAN EARTH SCIENCES
	2011-04-30
卷号	41 期号:1 页码:56-68
关键词	Northeastern Vietnam South China block Triassic tectonics Ophiolitic melange zone Ductile shearing Decollement
ISSN号	1367-9120
DOI	10.1016/j.jseaes.2011.01.002
文献子类	Article
英文摘要	A careful re-examination of the previous tectonic descriptions and the acquisition of new structural and kinematic data have been undertaken in Northeastern Vietnam. The structure of the area consists of a system of slightly metamorphosed but ductilely deformed nappes, including recumbent folds, formed during the Triassic, prior to the unconformable deposition of the Upper Triassic terrigenous sediments. These results confirm the previous interpretation of "preyunnanaises nappes", represented by Middle-Upper Paleozoic foliated limestone resting through a flat mylonitic contact over an intermediate "Song Mien unit" (Deprat, 1915), the latter made essentially of deformed Lower Triassic sedimentary and volcanic formations, which previously filled the Song Hien rift (Bourret, 1922a,b). In the external part of the belt, the Triassic strata conformably overlie slightly deformed and unmetamorphosed Upper Paleozoic rocks, forming an autochthonous domain. Alternatively, the same Triassic succession can be seen resting tectonically through decollement zones, directly over the Middle Paleozoic marbles, to form a distinct but subsidiary allochthonous unit. Our data show that the Song Chay orthogneiss and its Lower Paleozoic sedimentary country rocks belong to the main nappe. They also demonstrate that this nappe was transported to the N-NE. A newly discovered ophiolitic melange of supposed oceanic nature and Triassic age, lying along the Song Chay Fault, North of the Nui Con Voi, could hypothetically represent the rooted zone of the nappe. A Tertiary overprinting event, in particular accommodated by strike-slip movements, likely accounts for the present orocline of NE Vietnam. (C) 2011 Elsevier Ltd. All rights reserved.
WOS关键词	INDOSINIAN OROGENY ; SE ASIA ; CHINA ; TECTONICS ; CONSTRAINTS ; YUNNAN ; BELT ; ZONE ; AGES ; DOME
WOS研究方向	Geology
语种	英语
出版者	PERGAMON-ELSEVIER SCIENCE LTD
WOS记录号	WOS:000289542200004
资助机构	Institut des Sciences de la Terre de Paris (ISTeP) ; Institut des Sciences de la Terre de Paris (ISTeP) ; AUF ("Action Universitaire pour la Francophonie, bureau Asie Pacifique de Hanoi") ; AUF ("Action Universitaire pour la Francophonie, bureau Asie Pacifique de Hanoi") ; National Foundation for Sciences and Technology Development of Vietnam(105.01 ; National Foundation for Sciences and Technology Development of Vietnam(105.01 ; 105.01.53.09 ; 105.01.53.09 ; 105.06.60.09) ; 105.06.60.09) ; Institut des Sciences de la Terre de Paris (ISTeP) ; Institut des Sciences de la Terre de Paris (ISTeP) ; AUF ("Action Universitaire pour la Francophonie, bureau Asie Pacifique de Hanoi") ; AUF ("Action Universitaire pour la Francophonie, bureau Asie Pacifique de Hanoi") ; National Foundation for Sciences and Technology Development of Vietnam(105.01 ; National Foundation for Sciences and Technology Development of Vietnam(105.01 ; 105.01.53.09 ; 105.01.53.09 ; 105.06.60.09) ; 105.06.60.09) ; Institut des Sciences de la Terre de Paris (ISTeP) ; Institut des Sciences de la Terre de Paris (ISTeP) ; AUF ("Action Universitaire pour la Francophonie, bureau Asie Pacifique de Hanoi") ; AUF ("Action Universitaire pour la Francophonie, bureau Asie Pacifique de Hanoi") ; National Foundation for Sciences and Technology Development of Vietnam(105.01 ; National Foundation for Sciences and Technology Development of Vietnam(105.01 ; 105.01.53.09 ; 105.01.53.09 ; 105.06.60.09) ; 105.06.60.09) ; Institut des Sciences de la Terre de Paris (ISTeP) ; Institut des Sciences de la Terre de Paris (ISTeP) ; AUF ("Action Universitaire pour la Francophonie, bureau Asie Pacifique de Hanoi") ; AUF ("Action Universitaire pour la Francophonie, bureau Asie Pacifique de Hanoi") ; National Foundation for Sciences and Technology Development of Vietnam(105.01 ; National Foundation for Sciences and Technology Development of Vietnam(105.01 ; 105.01.53.09 ; 105.01.53.09 ; 105.06.60.09) ; 105.06.60.09)
内容类型	期刊论文
源URL	[http://ir.iggcas.ac.cn/handle/132A11/74685]
专题	中国科学院地质与地球物理研究所
通讯作者	Lepvrier, Claude
作者单位	1.Univ Paris 06, CNRS, ISTeP, UMR 7193, F-75252 Paris 05, France 2.Univ Orleans, CNRS, ISTO, UMR 6113, F-45067 Orleans 2, France 3.Hanoi Univ Sci, Fac Geol, Hanoi, Vietnam 4.Chinese Acad Sci, Inst Geol & Geophys, State Key Lab Lithospher Evolut, Beijing, Peoples R China
推荐引用方式 GB/T 7714	Lepvrier, Claude,Faure, Michel,Vuong Nguyen Van,et al. North-directed Triassic nappes in Northeastern Vietnam (East Bac Bo)[J]. JOURNAL OF ASIAN EARTH SCIENCES,2011,41(1):56-68.
APA	Lepvrier, Claude.,Faure, Michel.,Vuong Nguyen Van.,Tich Van Vu.,Lin, Wei.,...&Phuong Ta Hoa.(2011).North-directed Triassic nappes in Northeastern Vietnam (East Bac Bo).JOURNAL OF ASIAN EARTH SCIENCES,41(1),56-68.
MLA	Lepvrier, Claude,et al."North-directed Triassic nappes in Northeastern Vietnam (East Bac Bo)".JOURNAL OF ASIAN EARTH SCIENCES 41.1(2011):56-68.