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Mid-Late Cretaceous igneous activity in South China: the Qianjia example, Hainan Island
Sun, Sai-Jun1; Zhang, Li-Peng2; Zhang, Rong-Qing1; Ding, Xing4,5; Zhu, Hong-Li5; Zhang, Zhao-Feng5; Sun, Wei-Dong2,3,4
2018
发表期刊INTERNATIONAL GEOLOGY REVIEW
ISSN0020-6814
卷号60期号:11-14页码:1665-1683
通讯作者Sun, Wei-Dong(weidongsun@gig.ac.cn)
摘要Both Pacific and Neo-Tethys plates had major influences on the Cretaceous magmatisms in southeastern China. The subduction of the Neo-Tethys plate is, however, not well studied. This paper reports zircon U-Pb ages, Lu-Hf isotopes, whole-rock geochemistry, and Sr-Nd isotopes for the Qianjia intrusive rocks in Hainan Island, southeast China. LA-inductively coupled plasma mass spectrometry zircon U-Pb dating of granites and dark enclave monzonite in the area yield magmatic crystallization ages of ca. 100Ma, which are consistent with other Late Cretaceous granites, e.g. Baocheng, Tunchang, and Yaliang. Both rocks show high-K calc-alkaline compositions and metaluminous to weakly peraluminous signatures belonging to I-type rocks. They are enriched in the alkalis, Rb, Th, U, K, and light rare earth elements, depleted in Nb, Ta, Ti, and P, and characterized by high Al2O3 contents (14-15wt%) and high Mg-# values (50-53). Among them, some of granodiorites have geochemical affinities of adakitic rocks. Zircon epsilon(Hf)(t) values range from -5.97 to -1.18, with fairly constant whole-rock Sr-Nd isotopes (I-Sr=0.7084-0.7086; epsilon(Nd)(t)=-4.97 to -4.29) similar with those of the Cretaceous mafic dikes (136-81Ma) in Hainan Island, which are the result of partial melting of subduction-related sub-continental lithospheric mantle. Combined with Sr-Nd isotopes and negative Hf isotope, Qianjia intrusive rocks were likely derived from hybrid melts of underplated continental crust-derived with mantle-derived, then experienced varied degrees of fractional crystallization. According to the latest geophysical, sedimentological, and geochemical data, previous authors identified a Cretaceous E-W-trend subduction zone in the northern margin of the South China Sea. Combined with the southern margin magmatisms (110-80Ma) and magmatisms of similar to 120Ma distributed east-west ward from the Philippines to the Vietnam, We preferred that the subduction of the E-W-trend Neo-Tethys plate was the main geodynamic mechanism which induced the Cretaceous large-scale magmatisms in the southern margin of South China Block.
关键词Zircon ages Mid-Late Cretaceous intrusive rocks South China Hainan Island Neo-Tethys plate
DOI10.1080/00206814.2017.1402379
收录类别SCI
语种英语
资助项目Ministry of Science and Technology[2016YFC0600408] ; National Natural Science Foundation of China[41403034] ; Ministry of Science and Technology[2016YFC0600408] ; National Natural Science Foundation of China[41403034]
WOS研究方向Geology
WOS类目Geology
WOS记录号WOS:000443879500016
出版者TAYLOR & FRANCIS INC
引用统计
被引频次:17[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.qdio.ac.cn/handle/337002/160248
专题深海极端环境与生命过程研究中心
通讯作者Sun, Wei-Dong
作者单位1.Chinese Acad Sci, Guangzhou Inst Geochem, CAS Key Lab Mineral & Metallogeny, Guangzhou, Guangdong, Peoples R China
2.Chinese Acad Sci, Inst Oceanog, Ctr Deep Sea Res, Qingdao 266071, Peoples R China
3.Qingdao Natl Lab Marine Sci & Technol, Lab Marine Mineral Resources, Qingdao, Peoples R China
4.Chinese Acad Sci, cAS Ctr Excellence Tibetan Plateau Earth Sci, Beijing, Peoples R China
5.Chinese Acad Sci, Guangzhou Inst Geochem, State Key Lab Isotope Geochem, Guangzhou, Guangdong, Peoples R China
通讯作者单位中国科学院海洋研究所
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Sun, Sai-Jun,Zhang, Li-Peng,Zhang, Rong-Qing,et al. Mid-Late Cretaceous igneous activity in South China: the Qianjia example, Hainan Island[J]. INTERNATIONAL GEOLOGY REVIEW,2018,60(11-14):1665-1683.
APA Sun, Sai-Jun.,Zhang, Li-Peng.,Zhang, Rong-Qing.,Ding, Xing.,Zhu, Hong-Li.,...&Sun, Wei-Dong.(2018).Mid-Late Cretaceous igneous activity in South China: the Qianjia example, Hainan Island.INTERNATIONAL GEOLOGY REVIEW,60(11-14),1665-1683.
MLA Sun, Sai-Jun,et al."Mid-Late Cretaceous igneous activity in South China: the Qianjia example, Hainan Island".INTERNATIONAL GEOLOGY REVIEW 60.11-14(2018):1665-1683.
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