Paleozoic crustal evolution and tectonic switching in the Northeastern Tianshan: insights from zircon Hf isotopes of granitoids

doi:10.1144/jgs2020-035

CORC > 海洋研究所 > 中国科学院海洋研究所

	Paleozoic crustal evolution and tectonic switching in the Northeastern Tianshan: insights from zircon Hf isotopes of granitoids
	Du, Long 1,2,6; Zhu, Hongli 1,4; Yuan, Chao 3; Zhang, Yunying 5; Huang, Zongying 3; Li, Xu-Ping 2; Long, Xiaoping 6
刊名	JOURNAL OF THE GEOLOGICAL SOCIETY
	2020-12-07
页码	10
ISSN号	0016-7649
DOI	10.1144/jgs2020-035
通讯作者	Long, Xiaoping(longxp@nwu.edu.cn)
英文摘要	Decoding the crustal and tectonic evolution of ancient accretionary orogens is not always straightforward. Here, four episodes of Paleozoic granitoids have been identified with distinct zircon-Hf isotopic characteristics from the Northeastern Tianshan. The first stage granitoids in the Dananhu-Harlik arc system are characterized by highly positive zircon epsilon(Hf)(t) values and short crustal incubation times with a rising event signature, suggesting a northward trench advance for the Kangguer Ocean. During the second stage, granitoids in the Dananhu and Kangguer belts have high zircon epsilon(Hf)(t) values and short crustal incubation times, but with a decreasing event signature for the Dananhu granitoids, implying a reworking of the juvenile arc crust. However, the near-zero epsilon(Hf)(t) values and the longest crustal incubation times of the Yamansu granitoids in this stage elucidate an origin from a Precambrian basement. These variations suggest that the northern trench of the Kangguer Ocean retreated southward while the southern trench advanced southward. During the third stage, the enlarged ranges of zircon epsilon(Hf)(t) values and crustal residence ages as well as crustal incubation times for the Dananhu and Kangguer granitoids show an interaction of juvenile material and the pre-existing crust, whereas the highly positive zircon epsilon(Hf)(t) values with a sharp rising event signature of the Yamansu granitoids suggest an significant crustal growth, indicating that a northward trench advance and a southern trench retreat for the Kangguer Ocean. However, the last stage granitoids in the Northeastern Tianshan entirely exhibit decreasing zircon epsilon(Hf)(t) values and long crustal incubation times, demonstrating a reworking of the pre-existing juvenile crust with minor input of ancient crustal materials in a post-collisional setting.
资助项目	National Key Research and Development Project[2019YFA0708601] ; National Natural Science Foundation of China[41903031] ; National Natural Science Foundation of China[U1906207] ; China Postdoctoral Science Foundation[2019M652431]
WOS研究方向	Geology
语种	英语
出版者	GEOLOGICAL SOC PUBL HOUSE
WOS记录号	WOS:000596398100001
内容类型	期刊论文
源URL	[http://ir.qdio.ac.cn/handle/337002/169396]
专题	中国科学院海洋研究所
通讯作者	Long, Xiaoping
作者单位	1.Qingdao Natl Lab Marine Sci & Technol, Lab Marine Mineral Resources, Qingdao 266237, Peoples R China 2.Shandong Univ Sci & Technol, Coll Earth Sci & Engn, Qingdao 266590, Peoples R China 3.Chinese Acad Sci, Guangzhou Inst Geochem, State Key Lab Isotope Geochem, Guangzhou 510640, Peoples R China 4.Chinese Acad Sci, Inst Oceanog, Ctr Deep Sea Res, Qingdao 266071, Peoples R China 5.Univ Hong Kong, Dept Earth Sci, Hong Kong, Peoples R China 6.Northwest Univ, Dept Geol, State Key Lab Continental Dynam, Xian 710069, Peoples R China
推荐引用方式 GB/T 7714	Du, Long,Zhu, Hongli,Yuan, Chao,et al. Paleozoic crustal evolution and tectonic switching in the Northeastern Tianshan: insights from zircon Hf isotopes of granitoids[J]. JOURNAL OF THE GEOLOGICAL SOCIETY,2020:10.
APA	Du, Long.,Zhu, Hongli.,Yuan, Chao.,Zhang, Yunying.,Huang, Zongying.,...&Long, Xiaoping.(2020).Paleozoic crustal evolution and tectonic switching in the Northeastern Tianshan: insights from zircon Hf isotopes of granitoids.JOURNAL OF THE GEOLOGICAL SOCIETY,10.
MLA	Du, Long,et al."Paleozoic crustal evolution and tectonic switching in the Northeastern Tianshan: insights from zircon Hf isotopes of granitoids".JOURNAL OF THE GEOLOGICAL SOCIETY (2020):10.