Early Cretaceous Magma Mingling in Xiaocuo,Southeastern China Continental Margin:Implications for Subduction of Paleo-Pacific Plate

被引:0
|
作者
ZHOU Liyun [1 ]
WANG Yu [1 ]
HEI Huixin [1 ]
ZHOU Xiaohui [2 ]
机构
[1] Institute of Earth Sciences,China University of Geosciences,Beijing
[2] Department of Earth and Environmental Sciences,University of Waterloo
关键词
magma mingling; mafic and felsic magma; zircon U-Pb ages; zircon Hf isotopes; southeastern China continental margin;
D O I
暂无
中图分类号
P542 [构造运动];
学科分类号
070904 ;
摘要
Magma mingling has been identified within the continental margin of southeastern China.This study focuses on the relationship between mafic and felsic igneous rocks in composite dikes and plutons in this area,and uses this relationship to examine the tectonic and geodynamic implications of the mingling of mafic and felsic magmas.Mafic magmatic enclaves(MMEs) show complex relationships with the hosting Xiaocuo granite in Fujian area,including lenticular to rounded porphyritic microgranular enclaves containing abundant felsic/mafic phenocrysts,elongate mafic enclaves,and back-veining of the felsic host granite into mafic enclaves.LA-ICP-MS zircon U-Pb analyses show crystallization of the granite and dioritic mafic magmatic enclave during ca.132 and 116 Ma.The host granite and MMEs both show zircon growth during repeated thermal events at-210 Ma and 160-180 Ma.Samples from the magma mingling zone generally contain felsic-derived zircons with well-developed growth zoning and aspect ratios of 2-3,and maficderived zircons with no obvious oscillatory zoning and with higher aspect ratios of 5-10.However,these two groups of zircons show no obvious trace element or age differences.The Hf-isotope compositions show that the host granite and MMEs have similar εHf(t) values from negative to positive which suggest a mixed source from partial melting of the Meso-Neoproterozoic with involvement of enriched mantlederived magmas or juvenile components.The lithologies,mineral associations,and geochemical characteristics of the mafic and felsic rocks in this study area indicate that both were intruded together,suggesting Early Cretaceous mantle—crustal interactions along the southeastern China continental margin.The Early Cretaceous magma mingling is correlated to subduction of Paleo-Pacific plate.
引用
收藏
页码:1713 / 1742
页数:30
相关论文
共 50 条
  • [1] Early Cretaceous Magma Mingling in Xiaocuo, Southeastern China Continental Margin: Implications for Subduction of Paleo-Pacific Plate
    Zhou Liyun
    Wang Yu
    Hei Huixin
    Zhou Xiaohui
    [J]. ACTA GEOLOGICA SINICA-ENGLISH EDITION, 2016, 90 (05) : 1713 - 1742
  • [2] Thermal histories of Cretaceous basins in Korea: Implications for response of the East Asian continental margin to subduction of the Paleo-Pacific Plate
    Choi, Taejin
    Lee, Yong Il
    [J]. ISLAND ARC, 2011, 20 (03) : 371 - 385
  • [3] Jurassic to Early cretaceous sedimentary record: indications of Paleo-Pacific Plate subduction in Southeast China
    Xu, Qingjun
    Liu, Shaofeng
    Li, Ruiwei
    Wang, Zhifeng
    Zhang, Chuan
    Zhang, Bo
    [J]. INTERNATIONAL GEOLOGY REVIEW, 2022, 64 (16) : 2233 - 2261
  • [4] Early Cretaceous granitoids and gabbro in the Liaodong Peninsula: implications for delamination of the North China Craton and Paleo-Pacific Plate subduction
    Li, Jinyu
    Qian, Ye
    Sun, Jinlei
    Li, Haoran
    Zhao, Changji
    Sun, Fengyue
    Shen, Yanjie
    [J]. MINERALOGY AND PETROLOGY, 2021, 115 (03) : 299 - 322
  • [5] Early Cretaceous granitoids and gabbro in the Liaodong Peninsula: implications for delamination of the North China Craton and Paleo-Pacific Plate subduction
    Jinyu Li
    Ye Qian
    Jinlei Sun
    Haoran Li
    Changji Zhao
    Fengyue Sun
    Yanjie Shen
    [J]. Mineralogy and Petrology, 2021, 115 : 299 - 322
  • [6] Early ? Middle Jurassic magmatic rocks along the coastal region of southeastern China: Petrogenesis and implications for Paleo-Pacific plate subduction
    Zhao, Jiao-Long
    Qiu, Jian-Sheng
    Liu, Liang
    [J]. JOURNAL OF ASIAN EARTH SCIENCES, 2021, 210
  • [7] Magmatic responses to Cretaceous subduction and tearing of the paleo-Pacific Plate in SE China: An overview
    Guo, Feng
    Wu, Yangming
    Zhang, Bo
    Zhang, Xiaobing
    Zhao, Liang
    Liao, Jie
    [J]. EARTH-SCIENCE REVIEWS, 2021, 212
  • [8] Subduction of the paleo-Pacific plate recorded by arc volcanism in the South China Sea margin
    Xu, Feng
    Zhang, Guoliang
    Yan, Wen
    Zhang, Ji
    Yao, Junhua
    [J]. GONDWANA RESEARCH, 2022, 110 : 58 - 72
  • [9] Implications of Late Triassic-Middle Jurassic detrital zircons from the southeastern margin of the South China Block for the Paleo-Pacific Plate subduction
    Kong, Jintao
    Xu, Zhongjie
    Sun, Ningchen
    Cheng, Rihui
    [J]. GEOCHEMISTRY, 2024, 84 (03):
  • [10] Petrogenesis of Early Cretaceous volcanic rocks in the southeastern margin of the Songliao Basin, NE China: implications for the geodynamic evolution of Paleo-Pacific Ocean
    Shengnan Sun
    Zhigang Song
    Zuozhen Han
    Xiang Ren
    Pengfei Wei
    [J]. International Journal of Earth Sciences, 2024, 113 : 687 - 712