Aleutian island arc magma production rates and primary controlling factors

doi:10.1016/j.margeo.2020.106346

CORC > 深海科学与工程研究所 > 中国科学院深海科学与工程研究所 > 深海科学研究部 > 深海地球物理与资源研究室

	Aleutian island arc magma production rates and primary controlling factors
	Bai, Yongliang 2; Zhang, Diya 2; Dong, Dongdong 1; Wu, Shiguo 3; Wang, Zhenjie 2
刊名	MARINE GEOLOGY
	2020-12-01
卷号	430 页码:13
关键词	Island arc magmatism Aleutian subduction zone Gravity inversion Subduction zone temperature Mantle melting
ISSN号	0025-3227
DOI	10.1016/j.margeo.2020.106346
英文摘要	Island arc magmatism is considered a major mechanism of continental crustal growth; hence, the variation in island arc magma production rates and its influencing factors are of great importance. The along-arc strike variation in the island arc magma production rate is important for elucidating whether the subduction zone temperature is a controlling factor on arc magmatism. No back-arc spreading or ridge subduction is occurring in the intraoceanic subduction region of the Aleutian subduction zone, and the along-arc temperatures vary due to differences in the subducting plate age, convergence rate, and slab dip. Therefore, this is an ideal region to study the correlation between magma production rates and subduction zone temperatures. However, previous studies estimated the magma production rates at only a few locations due to the insufficient coverage of seismic data. Here, we employ the gravity inversion method based on density modelling and seismic data constraints to calculate the present-day arc crustal thickness and then obtain the magmatic thickness by removing the preexisting crustal thickness from the present-day arc crustal thickness. Finally, the magma production rates along the main intraoceanic subduction region of the Aleutian Arc are mapped by estimating the island arc magmatic thickness and the most recent subduction inception dating result. In addition, the subduction zone temperatures and mantle melt amounts along five profiles across the Aleutian Arc are calculated. The magma production rate variation is highly correlated with the mantle melt amount. The slab temperature controls the extent of the slab dehydration, which is essential for mantle wedge melting, and the mantle wedge temperature controls the size of the hydrated mantle melting region and the melting fraction therein. Therefore, as the subduction zone temperature controls the mantle melt amount, we suggest that the subduction zone temperature is the first-order controlling factor on the magma production rate.
资助项目	National Natural Science Foundation of China[91958211] ; National Natural Science Foundation of China[41976051] ; National Natural Science Foundation of China[U1701245] ; Key National Research Project of China[2019YFC1509204] ; Key National Research Project of China[2018YFC0603300] ; Key Deployment Project of the Center for Ocean Mega-Science of CAS[OMS2019Q10] ; Open Fund of State Key Laboratory of Earthquake Dynamics[LED2019B01]
WOS研究方向	Geology ; Oceanography
语种	英语
出版者	ELSEVIER
WOS记录号	WOS:000595643300015
资助机构	National Natural Science Foundation of China ; Key National Research Project of China ; Key Deployment Project of the Center for Ocean Mega-Science of CAS ; Open Fund of State Key Laboratory of Earthquake Dynamics
内容类型	期刊论文
源URL	[http://ir.idsse.ac.cn/handle/183446/8450]
专题	深海科学研究部_深海地球物理与资源研究室
通讯作者	Bai, Yongliang
作者单位	1.Chinese Acad Sci, Inst Oceanol, Key Lab Marine Geol & Environm, Qingdao 266071, Peoples R China 2.China Univ Petr, Coll Oceanog & Space Informat, Qingdao 266580, Peoples R China 3.Chinese Acad Sci, Inst Deep Sea Sci & Engn, Sanya 572000, Peoples R China
推荐引用方式 GB/T 7714	Bai, Yongliang,Zhang, Diya,Dong, Dongdong,et al. Aleutian island arc magma production rates and primary controlling factors[J]. MARINE GEOLOGY,2020,430:13.
APA	Bai, Yongliang,Zhang, Diya,Dong, Dongdong,Wu, Shiguo,&Wang, Zhenjie.(2020).Aleutian island arc magma production rates and primary controlling factors.MARINE GEOLOGY,430,13.
MLA	Bai, Yongliang,et al."Aleutian island arc magma production rates and primary controlling factors".MARINE GEOLOGY 430(2020):13.