Tectonic attribution of the Langshan area in western Inner Mongolia and   implications for the Neoarchean-Paleoproterozoic evolution of the   Western North China Craton: Evidence from LA-ICP-MS zircon U-Pb dating   of the Langshan basement

doi:10.1016/j.lithos.2016.03.005

CORC > 北京大学 > 地球与空间科学学院

	Tectonic attribution of the Langshan area in western Inner Mongolia and implications for the Neoarchean-Paleoproterozoic evolution of the Western North China Craton: Evidence from LA-ICP-MS zircon U-Pb dating of the Langshan basement
	Wang, Zeng-Zhen ; Han, Bao-Fu ; Feng, Li-Xia ; Liu, Bo ; Zheng, Bo ; Kong, Ling-Jie
刊名	LITHOS
	2016
关键词	LA-ICP-MS Neoarchean-Paleoproterozoic Langshan basement Alxa Block North China Craton EASTERN ALXA BLOCK WHOLE-ROCK GEOCHEMISTRY HF ISOTOPIC COMPOSITION KHONDALITE BELT TECTONOTHERMAL EVENTS DETRITAL ZIRCONS COMPLEX CONSTRAINS PELITIC GRANULITES METAMORPHIC ROCKS TRACE-ELEMENT
DOI	10.1016/j.lithos.2016.03.005
英文摘要	The Langshan area in western Inner Mongolia, China, is situated on the conjunction of the Alxa Block in the west, the northern North China Craton (NCC) in the east, and the Central Asian Orogenic Belt in the north, but its tectonic attribution has long been in debate, because the Alxa Block may be an independent Precambrian block from the NCC and the boundary between the two blocks may lie along the Bayanwulashan, to the west of the Langshan, instead of around the Helanshan area, to the east of the Langshan. In this study, new LA-ICP-MS zircon U-Pb ages of four gneisses, one amphibolite, and three granites, combined with previously published age data from Langshan basement rocks, indicate that the Langshan area may be subdivided into the Main Langshan, to the north of a series of NNW-trending faults, and the Southern Langshan in the south. The Main Langshan basement rocks were mainly formed during Neoarchean-Paleoproterozoic, with five major stages of similar to 2.7 Ga (2686 Ma), similar to 2.6 Ga (2619-2563 Ma), similar to 2.5 Ga (2534-2491 Ma), similar to 1.95 Ga (1969-1938 Ma), and similar to 1.7 Ga (1672 Ma). These stages are largely consistent with the major tectonothermal events of the northern NCC during Neoarchean-Paleoproterozoic but significantly different from the principal formation period (ca. 2.5-1.9 Ga) of Alxa basement rocks. The Southern Langshan is characterized by the presence of late Paleoproterozoic (similar to 1.9 Ga) and Neoproterozoic (similar to 0.9 Ga) rocks, and the latter is consistent with the Neoproterozoic magmatism in central Alxa Block, which might be formed in a orogenesis-related compressional environment, in contrast to contemporaneous rift-related extensional tectonic setting within the NCC. Therefore, the Main Langshan and the Southern Langshan are most likely closely related to the northern NCC and the Alxa Block, respectively. (C) 2016 Elsevier B.V. All rights reserved.; Ministry of Science and Technology of China [2013CB429806]; SCI(E); ARTICLE; bfhan@pku.edu.cn; ,SI; 278-295; 261
语种	英语
内容类型	期刊论文
源URL	[http://ir.pku.edu.cn/handle/20.500.11897/447962]
专题	地球与空间科学学院
推荐引用方式 GB/T 7714	Wang, Zeng-Zhen,Han, Bao-Fu,Feng, Li-Xia,et al. Tectonic attribution of the Langshan area in western Inner Mongolia and implications for the Neoarchean-Paleoproterozoic evolution of the Western North China Craton: Evidence from LA-ICP-MS zircon U-Pb dating of the Langshan basement[J]. LITHOS,2016.
APA	Wang, Zeng-Zhen,Han, Bao-Fu,Feng, Li-Xia,Liu, Bo,Zheng, Bo,&Kong, Ling-Jie.(2016).Tectonic attribution of the Langshan area in western Inner Mongolia and implications for the Neoarchean-Paleoproterozoic evolution of the Western North China Craton: Evidence from LA-ICP-MS zircon U-Pb dating of the Langshan basement.LITHOS.
MLA	Wang, Zeng-Zhen,et al."Tectonic attribution of the Langshan area in western Inner Mongolia and implications for the Neoarchean-Paleoproterozoic evolution of the Western North China Craton: Evidence from LA-ICP-MS zircon U-Pb dating of the Langshan basement".LITHOS (2016).