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

doi:10.1016/j.dsr.2023.104039

CORC > 海洋研究所 > 中国科学院海洋研究所 > 深海极端环境与生命过程研究中心

	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
刊名	DEEP-SEA RESEARCH PART I-OCEANOGRAPHIC RESEARCH PAPERS
	2023-07-01
卷号	197 页码:10
关键词	Boninitic greenstones Post-collisional magmatism Yap-Mariana junction Plateau-arc interaction
ISSN号	0967-0637
DOI	10.1016/j.dsr.2023.104039
通讯作者	Zhang, Guoliang(zhangguoliang@qdio.ac.cn)
英文摘要	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.
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关键词	PHILIPPINE-SEA ; SLAB DETACHMENT ; PARECE VELA ; MANTLE ; BASALTS ; ELEMENT ; HF ; CLASSIFICATION ; PETROGENESIS ; METAMORPHISM
WOS研究方向	Oceanography
语种	英语
出版者	PERGAMON-ELSEVIER SCIENCE LTD
WOS记录号	WOS:001003653900001
内容类型	期刊论文
源URL	[http://ir.qdio.ac.cn/handle/337002/182237]
专题	海洋研究所_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 Ocean Mega Sci, Qingdao 266071, Peoples R China 2.Chinese Acad Sci, Ctr Deep Sea Res, Inst Oceanol, Qingdao 266071, Peoples R China 3.Univ Houston, Dept Earth & Atmospher Sci, Houston, TX 77004 USA
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.