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Initial subduction of the Paleo-Pacific Oceanic plate in NE China: Constraints from whole-rock geochemistry and zircon U-Pb and Lu-Hf isotopes of the Khanka Lake granitoids

文献类型：期刊论文

作者Liu, Kai1,2; Zhang, Jinjiang1; Wilde, Simon A.2; Zhou, Jianbo3; Wang, Meng4; Ge, Maohui1; Wang, Jiamin5; Ling, Yiyun1
刊名LITHOS
出版日期2017-03-01
卷号274页码:254-270
关键词Central Asian Orogenic Belt Khanka Block Khanka Lake Granitoids Adakite Paleo-pacific Oceanic Plate
ISSN号0024-4937
DOI10.1016/j.lithos.2016.12.022
文献子类Article
英文摘要Northeast China is located in the eastern part of the Central Asian Orogenic Belt (CAOB) and was influenced by Paleo-Pacific subduction during the Mesozoic. Abundant granitoids from the late Paleozoic to early Mesozoic in NE China record this process, including the Khanka Lake granitoids, which resulted in extensive growth of continental crust in the area. However, the question of how and when the Paleo-Pacific tectonic system began to affect NE China is still highly controversial. The Khanka Lake granitoids can be subdivided into two main components based on their geochemical characteristics, namely granodiorite and syenogranite. The granodiorite has a U-Pb age of 249 Ma and is adakite-like (enriched in LREE and LILEs with high Mg#, Sr, La/Yb, Sr/Y and Na(2)o/K(2)o), with zircon epsilon(Hf)(t) values of -0.65 to 1.61, produced by the magma mixing between melting of the lower continental crust and juvenile basaltic magma. The syenogranite has zircon U-Pb ages of 209 to 199 Ma and geochemical features of highly fractionated I-type granites, with high Sio(2), total alkalis and low Mg (and Mg#), Fe, Cr and Ni, and positive zircon epsilon(Hf)(t) of 1.72 to 5.12, indicating an origin from remelting of juvenile crust. The granitoids were intruded by felsic veins between 195 and 184 Ma with positive zircon epsilon(Hf)(t) from 0.57 to 5.32. The epsilon(Hf)(t) values of the granitoids become more positive as the zircon U-Pb ages become younger, suggesting continuous melting of juvenile crust during subduction. It is concluded that the Khanka Lake granitoids record the early stage of subduction of the Paleo-Pacific Oceanic plate, which commenced at least ca. 250 Ma ago. (C) 2016 Elsevier B.V. All rights reserved.
WOS关键词ASIAN OROGENIC BELT ; EASTERN HEILONGJIANG PROVINCE ; A-TYPE GRANITES ; I-TYPE GRANITES ; TECTONIC IMPLICATIONS ; JIAMUSI MASSIF ; NORTHEASTERN CHINA ; INNER-MONGOLIA ; CRUSTAL GROWTH ; ACCRETIONARY COMPLEX
WOS研究方向Geochemistry & Geophysics ; Mineralogy
语种英语
WOS记录号WOS:000397375400016
出版者ELSEVIER SCIENCE BV
资助机构Major State Basic Research Development Program of China(2013 CB429804) ; Fundamental Research Funds for the Central Universities(310827161010) ; Major State Basic Research Development Program of China(2013 CB429804) ; Fundamental Research Funds for the Central Universities(310827161010) ; Major State Basic Research Development Program of China(2013 CB429804) ; Fundamental Research Funds for the Central Universities(310827161010) ; Major State Basic Research Development Program of China(2013 CB429804) ; Fundamental Research Funds for the Central Universities(310827161010)
源URL[http://ir.iggcas.ac.cn/handle/132A11/52997]  
专题地质与地球物理研究所_岩石圈演化国家重点实验室
通讯作者Zhang, Jinjiang
作者单位1.Peking Univ, Key Lab Orogen & Crustal Evolut, Minist Educ, Beijing 100871, Peoples R China
2.Curtin Univ, Inst Geosci Res, Dept Appl Geol, POB 111987, Perth, WA, Australia
3.Jilin Univ, Coll Earth Sci, Changchun 130061, Peoples R China
4.Changan Univ, Sch Earth Sci & Resources, Key Lab Study Focused Magmatism & Giant Ore Depos, Xian 710054, Peoples R China
5.Chinese Acad Sci, Inst Geol & Geophys, State Key Lab Lithospher Evolut, Beijing 100029, Peoples R China
推荐引用方式
GB/T 7714		 Liu, Kai,Zhang, Jinjiang,Wilde, Simon A.,et al. Initial subduction of the Paleo-Pacific Oceanic plate in NE China: Constraints from whole-rock geochemistry and zircon U-Pb and Lu-Hf isotopes of the Khanka Lake granitoids[J]. LITHOS,2017,274:254-270.
APA Liu, Kai.,Zhang, Jinjiang.,Wilde, Simon A..,Zhou, Jianbo.,Wang, Meng.,...&Ling, Yiyun.(2017).Initial subduction of the Paleo-Pacific Oceanic plate in NE China: Constraints from whole-rock geochemistry and zircon U-Pb and Lu-Hf isotopes of the Khanka Lake granitoids.LITHOS,274,254-270.
MLA Liu, Kai,et al."Initial subduction of the Paleo-Pacific Oceanic plate in NE China: Constraints from whole-rock geochemistry and zircon U-Pb and Lu-Hf isotopes of the Khanka Lake granitoids".LITHOS 274(2017):254-270.

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来源：地质与地球物理研究所

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