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Neoproterozoic (similar to 900 Ma) Sariwon sills in North Korea: Geochronology, geochemistry and implications for the evolution of the south-eastern margin of the North China Craton

文献类型：期刊论文

作者Peng, Peng1,2; Zhai, Ming-Guo1,2; Li, Qiuli1; Wu, Fuyuan1; Hou, Quanlin3; Li, Zhong1; Li, Tiesheng1; Zhang, Yanbin1
刊名GONDWANA RESEARCH
出版日期2011-07-01
卷号20期号:1页码:243-254
关键词North China Craton Neoproterozoic Korean Peninsula Sill And Dyke Rodinia Supercontinent
ISSN号1342-937X
DOI10.1016/j.gr.2010.12.011
文献子类Article
英文摘要The Sariwon sills are distributed in the Pyongnam basin at the center of the Korean peninsula, eastern part of the North China Craton. These sills are up to 150 m in thickness and up to more than 10 km in length. Baddeleyite grains separated from a similar to 50 m thick sill give a SIMS (206)Pb-(207)Pb age of 899 +/- 7 Ma (MSWD = 0.34, n = 14), which is interpreted to be the crystallization age of this sill. Zircon grains from the same sill gives a lower intercept U-Pb age of similar to 400 Ma, which is likely a close estimation of the greenschist-facies metamorphism of this sill. The Sariwon sills are dolerites and have tholeiitic compositions. They show enrichment of light rare earth element concentrations (La/Yb(N) = 1.4-2.8) and are slightly depleted in high field strength elements (e.g. Nb, Zr, and Ti), in comparison to neighboring elements on the primitive-mantle normalized spidergram. The whole rock epsilon Nd(t) (t = 900 Ma) values are around -2, whereas in-situ epsilon Hf(t) (t = 900 Ma) values from zircon grains vary from -25 to +8. They are similar to the coeval sills in other parts of the North China Craton, e.g., the Chulan sills (Xu-Huai basin, Shandong peninsula) and the Dalian sills (Lv-Da basin, Liaodong peninsula). These sills possibly originated from a depleted mantle source (e.g., asthenosphere), rather than from the ancient lithospheric mantle of the North China Craton, and have experienced significant assimilation of lithospheric materials. The strata and sills in the Xu-Huai, Lv-Da and Pyongnam basins are comparable; moreover the three basins are geographically correlatable based on Neoproterozoic geographical reconstruction. We therefore propose that there is a Xu-Huai-Lv-Da-Pyongnam rift system along the south-eastern edge of the North China Craton during Neoproterozoic (similar to 900 Ma), with the closure of the rift at similar to 400 Ma as a result of a continent-margin process. It is possible that this southeastern margin of the NCC did not face the inland in the configuration of the supercontinent Rodinia. (C) 2011 International Association for Gondwana Research. Published by Elsevier B.V. All rights reserved.
WOS关键词ZIRCON U-PB ; OGCHEON METAMORPHIC BELT ; TECTONIC IMPLICATION ; COLLISION BELT ; VOLCANIC-ROCKS ; YANGTZE BLOCK ; HF ISOTOPES ; LU-HF ; CONSTRAINTS ; PENINSULA
WOS研究方向Geology
语种英语
WOS记录号WOS:000292123600017
出版者ELSEVIER SCIENCE BV
资助机构(90714003) ; (90714003) ; (1731017007) ; (1731017007) ; (41072146) ; (41072146) ; (90714003) ; (90714003) ; (1731017007) ; (1731017007) ; (41072146) ; (41072146) ; (90714003) ; (90714003) ; (1731017007) ; (1731017007) ; (41072146) ; (41072146) ; (90714003) ; (90714003) ; (1731017007) ; (1731017007) ; (41072146) ; (41072146)
源URL[http://ir.iggcas.ac.cn/handle/132A11/73594]  
专题中国科学院地质与地球物理研究所
通讯作者Peng, Peng
作者单位1.Chinese Acad Sci, State Key Lab Lithospher Evolut, Inst Geol & Geophys, Beijing 100029, Peoples R China
2.Chinese Acad Sci, Key Lab Mineral Resources, Beijing 100029, Peoples R China
3.Chinese Acad Sci, Grad Univ, Beijing 100039, Peoples R China
推荐引用方式
GB/T 7714		 Peng, Peng,Zhai, Ming-Guo,Li, Qiuli,et al. Neoproterozoic (similar to 900 Ma) Sariwon sills in North Korea: Geochronology, geochemistry and implications for the evolution of the south-eastern margin of the North China Craton[J]. GONDWANA RESEARCH,2011,20(1):243-254.
APA Peng, Peng.,Zhai, Ming-Guo.,Li, Qiuli.,Wu, Fuyuan.,Hou, Quanlin.,...&Zhang, Yanbin.(2011).Neoproterozoic (similar to 900 Ma) Sariwon sills in North Korea: Geochronology, geochemistry and implications for the evolution of the south-eastern margin of the North China Craton.GONDWANA RESEARCH,20(1),243-254.
MLA Peng, Peng,et al."Neoproterozoic (similar to 900 Ma) Sariwon sills in North Korea: Geochronology, geochemistry and implications for the evolution of the south-eastern margin of the North China Craton".GONDWANA RESEARCH 20.1(2011):243-254.

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