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Geochronology and geochemistry of Late Cretaceous-Paleocene granitoids in the Sikhote-Alin Orogenic Belt: Petrogenesis and implications for the oblique subduction of the paleo-Pacific plate
Tang, Jie1,2; Xu, Wenliang1,3; Niu, Yaoling2,4; Wang, Feng1; Ge, Wenchun1; Sorokin, A. A.5; Chekryzhov, I. Y.6,7
2016-12-01
发表期刊LITHOS
卷号266页码:202-212
文章类型Article
摘要We present zircon U-Pb ages, major and trace element analyses, and zircon Hf isotope data on the Late Cretaceous-Paleocene granitoids at the southern end of the Sikhote-Alin Orogenic Belt of the Russian Far East. These data are used to discuss the petrogenesis of the granitoids in the context of the paleo-Pacific subduction beneath the eastern Eurasia. Zircons from four granitoid samples give emplacement ages of similar to 56, similar to 83, similar to 91, and similar to 92 Ma. These granitoids with high SiO2 (73.43-76.76 wt%) are metaluminous to weakly peraluminous (A/CNK = 0.97-1.03) and belong to the high-K calc-alkaline series (K2O = 3.75-4.95 wt%). They are all enriched in light rare earth elements (LREEs) and large ion lithophile elements (LILEs), and relatively depleted in high field strength elements (HFSEs) with striking depletion also in Ba, Sr, P and Eu. They are petrographically and geochemically consistent with being of I-type granitoids. The zircons have epsilon(Hf) (t) values (-0.8 to + 7.6) higher than whole-rock epsilon(Hf) (t) values predicted from whole-rock epsilon(Nd) (t) (-4.1 to +0.5) in the literature. All these observations suggest that primary magmas parental to these granitoids were likely to have derived from partial melting of a juvenile lower crust accompanied by assimilation with ancient mature crust during magma ascent and evolution. A recent study illustrates that the collision of an exotic terrane carried by the paleo-Pacific plate with the continental China at similar to 100 Ma accreted the basement of the Chinese continental shelf (beneath East and South China Seas), and resulted in a new plate boundary of transform nature between the NNW moving paleo-Pacific plate and the eastern margin of the shelf. Our new data and analysis of existing data support this hypothesis, but we hypothesize that this transform becomes transpressional in its northern segment with oblique subduction of the paleo-Pacific plate beneath northeastern Asia as manifested by the Late Cretaceous Paleocene granitoids in the Russian Far East-NE China (97-56 Ma) and South Korea-SW Japan (96-71 Ma). These tectonic and magmatic events took place prior to the opening of the Huanghai, Bohai and Japan seas, which are of rift-origin from continental China much later. Our study emphasizes the necessity and significance of plate tectonics reconstruction in the greater northwestern Pacific region since the Cretaceous. (C) 2016 Elsevier B.V. All rights reserved.
关键词Sikhote-alin Orogenic Belt Late Cretaceous-paleocene Granitoids Petrogenesis Oblique Subduction Paleo-pacific Plate
DOI10.1016/j.lithos.2016.09.034
收录类别SCI
语种英语
WOS记录号WOS:000390724200012
引用统计
文献类型期刊论文
版本出版稿
条目标识符http://ir.qdio.ac.cn/handle/337002/136260
专题海洋地质与环境重点实验室
作者单位1.Jilin Univ, Coll Earth Sci, 2199 Jianshe St, Changchun 130061, Peoples R China
2.Univ Durham, Dept Earth Sci, Durham DH1 3LE, England
3.China Univ Geosci, State Key Lab Geol Proc & Mineral Resources, Wuhan 430074, Peoples R China
4.Chinese Acad Sci, Inst Oceanol, Qingdao 266071, Peoples R China
5.Russian Acad Sci, Far Eastern Branch, Inst Geol & Nat Management, Ul B Khmelnitskogo 2, Blagoveshchensk 675000, Russia
6.Far East Geol Inst, 159 Pr 100 Let Viadivostoku, Vladivostok, Russia
7.Far Eastern Fed Univ, Sch Engn, 8 Sukhanova Str, Vladivostok, Russia
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Tang, Jie,Xu, Wenliang,Niu, Yaoling,et al. Geochronology and geochemistry of Late Cretaceous-Paleocene granitoids in the Sikhote-Alin Orogenic Belt: Petrogenesis and implications for the oblique subduction of the paleo-Pacific plate[J]. LITHOS,2016,266:202-212.
APA Tang, Jie.,Xu, Wenliang.,Niu, Yaoling.,Wang, Feng.,Ge, Wenchun.,...&Chekryzhov, I. Y..(2016).Geochronology and geochemistry of Late Cretaceous-Paleocene granitoids in the Sikhote-Alin Orogenic Belt: Petrogenesis and implications for the oblique subduction of the paleo-Pacific plate.LITHOS,266,202-212.
MLA Tang, Jie,et al."Geochronology and geochemistry of Late Cretaceous-Paleocene granitoids in the Sikhote-Alin Orogenic Belt: Petrogenesis and implications for the oblique subduction of the paleo-Pacific plate".LITHOS 266(2016):202-212.
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