Geochemical and geochronological constraints on the tectonic and magmatic evolution of the southwestern Mariana subduction zone

doi:10.1016/j.dsr.2023.104039

	Geochemical and geochronological constraints on the tectonic and magmatic evolution of the southwestern Mariana subduction zone
	Zhang, Ji 1,2; Zhang, Guoliang 1,2; Wu, Jonny 3
	2023-07-01
发表期刊	DEEP-SEA RESEARCH PART I-OCEANOGRAPHIC RESEARCH PAPERS
ISSN	0967-0637
卷号	197 页码:10
通讯作者	Zhang, Guoliang([email protected])
摘要	Interaction of a subduction zone with an oceanic plateau has implications for plate tectonics. However, the geodynamic processes and petrological responses to oceanic plateau-arc interactions remain enigmatic. The southwestern Mariana and Yap arcs have experienced interactions with the Caroline Plateau, which have affected the regional tectonism. In this study, tholeiitic basalts and metamorphosed volcanic rocks (i.e., greenstones) were recovered from the southwestern Mariana forearc. The protoliths of the metamorphosed volcanic rocks have geochemical affinities to low-silica boninites. These boninitic rocks have similar K-Ar and apatite U-Pb ages of ca. 24 Ma, which record the timing of collision between the southwestern Mariana arc and the Caroline Plateau. 40Ar/39Ar dating of plagioclase in the tholeiitic basalts dates post-collisional magmatism to ca. 18 Ma. The tholeiites have geochemical signatures of fore-arc basalts (e.g., low Ti/V ratios and light rare earth element-depleted patterns) and high Th/Yb ratios, which reflect a depleted mantle source with a subduction compo-nent inherited from a pre-collisional subduction event. We suggest that the southwestern Mariana arc is an intra-oceanic arc that underwent plateau-arc collisions. These plateau-arc interactions affected the tectonic and magmatic evolution of the southwestern Mariana arc and nearby western Pacific basins.
关键词	Boninitic greenstones Post-collisional magmatism Yap-Mariana junction Plateau-arc interaction
DOI	10.1016/j.dsr.2023.104039
收录类别	SCI
语种	英语
资助项目	Institute of Geology, China Earthquake Administration; Strategic Priority Research Program of the Chinese Academy of Sciences[XDA22050101]; National Key R&D Program of China[2022YFF0801000]; Marine S&T Fund of Shandong Province for Pilot National Laboratory for Marine Science and Technology (QNLM)[2022QNLM050201-3]; National Natural Science Foundation of China[91858206]; China Postdoctoral Science Foundation[2022M713184]; United States National Science Foundation[EAR-1848327]
WOS研究方向	Oceanography
WOS类目	Oceanography
WOS记录号	WOS:001003653900001
出版者	PERGAMON-ELSEVIER SCIENCE LTD
WOS关键词	PHILIPPINE-SEA ; SLAB DETACHMENT ; PARECE VELA ; MANTLE ; BASALTS ; ELEMENT ; HF ; CLASSIFICATION ; PETROGENESIS ; METAMORPHISM
引用统计	被引频次：2[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/337002/182238
专题	深海极端环境与生命过程研究中心
通讯作者	Zhang, Guoliang
作者单位	1.Chinese Acad Sci, Ctr Deep Sea Res, Inst Oceanol, Qingdao 266071, Peoples R China 2.Chinese Acad Sci, Ctr Ocean Mega Sci, Qingdao 266071, Peoples R China 3.Univ Houston, Dept Earth & Atmospher Sci, Houston, TX 77004 USA
第一作者单位	中国科学院海洋研究所
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	Zhang, Ji,Zhang, Guoliang,Wu, Jonny. Geochemical and geochronological constraints on the tectonic and magmatic evolution of the southwestern Mariana subduction zone[J]. DEEP-SEA RESEARCH PART I-OCEANOGRAPHIC RESEARCH PAPERS,2023,197:10.
APA	Zhang, Ji,Zhang, Guoliang,&Wu, Jonny.(2023).Geochemical and geochronological constraints on the tectonic and magmatic evolution of the southwestern Mariana subduction zone.DEEP-SEA RESEARCH PART I-OCEANOGRAPHIC RESEARCH PAPERS,197,10.
MLA	Zhang, Ji,et al."Geochemical and geochronological constraints on the tectonic and magmatic evolution of the southwestern Mariana subduction zone".DEEP-SEA RESEARCH PART I-OCEANOGRAPHIC RESEARCH PAPERS 197(2023):10.