Rernnants of a Neoproterozoic collisional orogenic belt in the core of;the phanerozoic Qinling orogenic belt (China)

	Rernnants of a Neoproterozoic collisional orogenic belt in the core of;the phanerozoic Qinling orogenic belt (China)
	Wang, T 5; Wang, XX ; Zhang, GW ; Pei, XZ ; Zhang, CL
刊名	GONDWANA RESEARCH
	2003
卷号	6 期号:4 页码:699-710
关键词	Qinling complex collisional orogeny deformed granitic pluton orogen replacement Rodinia
ISSN号	1342-937X
英文摘要	NW-SE trending paleotectonics are recognized from the WNW-ESE trending Qinling complex in the core of the Qinling belt. They consist of trending stratum, boundary shear zones, deformed linear plutons and ophiolite. The field relationships and ages of the deformation, magmatism and metamorphism suggest that the paleotectonics formed in Neoproterozoic. The ages of deformed and undeformed plutons approximately constrain the peak deformation during 958-889 Ma. Both the two trending tectonics constitute an orogen-scale tectonic replacement by S2 (Phanerozoic WNW-ESE tectonics) of S1 (NNW-SSE trending Neoproterozoic), similar to structural replacement in outcrop. The strong contractional deformation, (high-pressure) metamorphism, and granitic magmatism that evolved from syncollisional (S-type), to post-collisional (I-type) and to post-collisional (A-type), as well as regional extension at 885700 Ma in Qinling, display a cycle of a collisional orogeny. Thus, the NW-SE trending paleotectonics could be remnants of a collisional orogenic belt. The belt originally could trend NNW-SSE, if reworking and modification of Paleozoic and/or Mesozoic NNE-SSW contractional deformation are eliminated. Accordingly, assemblage and breakup of some continental blocks occurred in Neoproterozoic in Qinling, which seems to correspond to assemblage and breakup of Rodinia supercontinent in the world. This study provides new insight into the evolution of the Qinling orogenic belt and the reconstruction of Proterozoic supercontinent of China, and also presents a case study of recognition of an old orogen from a young orogen.
学科主题	构造地质学
WOS关键词	TECTONIC EVOLUTION ; EASTERN ASIA ; MOUNTAINS ; NORTH ; METAMORPHISM ; DEFORMATION ; MODEL ; ZONE
WOS研究方向	Geology
语种	英语
出版者	INT ASSOC GONDWANA RESEARCH
WOS记录号	WOS:000185980500013
内容类型	期刊论文
源URL	[http://119.78.100.197/handle/2HKVOGP0/37595]
专题	中国地质科学院地质研究所
作者单位	1.Chinese Acad Geol Sci, Inst Geol, Beijing 100037, Peoples R China. 2.China Univ Geosci, Inst Geol & Resources, Beijing 100083, Peoples R China. 3.Changam Univ, Dept Geol, Xian 710054, Peoples R China. 4.NW Univ Xian, Dept Geol, Xian 710069, Peoples R China. 5.中国地质科学院地质研究所
推荐引用方式 GB/T 7714	Wang, T,Wang, XX,Zhang, GW,et al. Rernnants of a Neoproterozoic collisional orogenic belt in the core of;the phanerozoic Qinling orogenic belt (China)[J]. GONDWANA RESEARCH,2003,6(4):699-710.
APA	Wang, T,Wang, XX,Zhang, GW,Pei, XZ,&Zhang, CL.(2003).Rernnants of a Neoproterozoic collisional orogenic belt in the core of;the phanerozoic Qinling orogenic belt (China).GONDWANA RESEARCH,6(4),699-710.
MLA	Wang, T,et al."Rernnants of a Neoproterozoic collisional orogenic belt in the core of;the phanerozoic Qinling orogenic belt (China)".GONDWANA RESEARCH 6.4(2003):699-710.