Mid-Late Cretaceous igneous activity in South China: the Qianjia example, Hainan Island

doi:10.1080/00206814.2017.1402379

	Mid-Late Cretaceous igneous activity in South China: the Qianjia example, Hainan Island
	Sun, Sai-Jun 1; Zhang, Li-Peng 2; Zhang, Rong-Qing 1; Ding, Xing 4,5; Zhu, Hong-Li 5; Zhang, Zhao-Feng 5; Sun, Wei-Dong2,3,4
	2018
发表期刊	INTERNATIONAL GEOLOGY REVIEW
ISSN	0020-6814
卷号	60 期号:11-14 页码:1665-1683
通讯作者	Sun, Wei-Dong([email protected])
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
DOI	10.1080/00206814.2017.1402379
收录类别	SCI
语种	英语
资助项目	Ministry of Science and Technology[2016YFC0600408]###2216; National Natural Science Foundation of China[41403034]###2217; 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：21[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
推荐引用方式 GB/T 7714	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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