Geochemistry and zircon U-Pb-Hf isotopes of the granitoids of Baolidao   and Halatu plutons in Sonidzuoqi area, Inner Mongolia: Implications for   petrogenesis and geodynamic setting

doi:10.1016/j.jseaes.2014.07.030

CORC > 北京大学 > 地球与空间科学学院

	Geochemistry and zircon U-Pb-Hf isotopes of the granitoids of Baolidao and Halatu plutons in Sonidzuoqi area, Inner Mongolia: Implications for petrogenesis and geodynamic setting
	Hu, Chuansheng ; Li, Wenbo ; Xu, Cheng ; Zhong, Richen ; Zhu, Feng
刊名	journal of asian earth sciences
	2015
关键词	Carboniferous Triassic High-K calc-alkaline granitoid Petrogenesis Post-collisional setting Western XMOB ASIAN OROGENIC BELT TECTONIC IMPLICATIONS CONTINENTAL GROWTH CRUSTAL GROWTH NORTH CHINA SOLONKER SUTURE EVOLUTION ROCKS ACCRETION ND
DOI	10.1016/j.jseaes.2014.07.030
英文摘要	The Baolidao and Halatu plutons are located in the Northern Orogenic Belt (NOB) in Sonidzuoqi area of Inner Mongolia, which has an important significance for the tectonic evolution of Xing-Meng Orogenic Belt (XMOB). The two plutons have been intensively studied but the conclusions are still controversial. Combined with the previous study, this paper gives new geological data about the two correlative plutons for gaining a better understanding of their petrogenesis and the geodynamic setting. The Baolidao granitoids contain two different series, calc-alkaline series mainly formed in the Ordovician and high K calc-alkaline series mainly formed in the Carboniferous. The Halatu granites are formed in the Triassic and belong to high-K calc-alkaline series. This study got the zircon U-Pb ages of 316-322 Ma for the Baolidao granitoids and 233 +/- 2 Ma for the Halatu syenogranites, respectively. In the tectonic discrimination diagrams, they mainly fall into the area of post-orogenic granites (POG). Hf isotopic analyses for the Baolidao granitoids (Sample BLD-1 and 3) shows epsilon(Hf) (t) = 3.0-14.0, with two-stage Hf model age (T-DM2) of 436-1138 Ma. The Halatu syenogranite (Sample HLT-1) also shows a depleted epsilon(Hf) (t) = 3.8-8.2, with T-DM2 of 741-1024 Ma, suggesting the major involvement of juvenile crustal components. The various epsilon(Hf) values of the Carboniferous Baolidao and Triassic Halatu granitoids indicates a hybrid magma source of juvenile material with old crustal component, and the epsilon(Hf) (t) values decrease from the Carboniferous to Triassic, suggesting the increasing proportion of old continental material during this period. Combined with the regional geology, the Carboniferous Baolidao granitoids are possibly not arc rocks, but originated from the post-collisional setting. The Triassic Halatu granites were formed in the subsequently extensional environment. (C) 2014 Elsevier Ltd. All rights reserved.; http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000347597800009&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=8e1609b174ce4e31116a60747a720701 ; Geosciences, Multidisciplinary; SCI(E); 12; ARTICLE; liwenbo@pku.edu.cn; ,SI; 294-306; 97
语种	英语
内容类型	期刊论文
源URL	[http://ir.pku.edu.cn/handle/20.500.11897/206822]
专题	地球与空间科学学院
推荐引用方式 GB/T 7714	Hu, Chuansheng,Li, Wenbo,Xu, Cheng,et al. Geochemistry and zircon U-Pb-Hf isotopes of the granitoids of Baolidao and Halatu plutons in Sonidzuoqi area, Inner Mongolia: Implications for petrogenesis and geodynamic setting[J]. journal of asian earth sciences,2015.
APA	Hu, Chuansheng,Li, Wenbo,Xu, Cheng,Zhong, Richen,&Zhu, Feng.(2015).Geochemistry and zircon U-Pb-Hf isotopes of the granitoids of Baolidao and Halatu plutons in Sonidzuoqi area, Inner Mongolia: Implications for petrogenesis and geodynamic setting.journal of asian earth sciences.
MLA	Hu, Chuansheng,et al."Geochemistry and zircon U-Pb-Hf isotopes of the granitoids of Baolidao and Halatu plutons in Sonidzuoqi area, Inner Mongolia: Implications for petrogenesis and geodynamic setting".journal of asian earth sciences (2015).