The factors controlling along-arc and across-arc variations of primitive arc magma compositions: A global perspective

doi:10.3389/feart.2022.1055255

	Wang, Jian 1; Gleeson, Matthew 1; Smith, William D. D.1,2; Ma, Lin3 ; Lei, Zhibin 1; Shi, Guanghai 4; Chen, Long 5
	The factors controlling along-arc and across-arc variations of primitive arc magma compositions: A global perspective
刊名	FRONTIERS IN EARTH SCIENCE
	2022-12-23
卷号	10 页码:14
DOI	10.3389/feart.2022.1055255
语种	英语
WOS研究方向	Geology
摘要	Arc volcanism is a key process influencing Earth's climate, continental growth, and the formation of mineral deposits. Therefore in this contribution, we have compiled whole-rock geochemistry of frontal arc and rear-/back-arc basalts, crustal thickness, and slab parameters (e.g., slab age, slab dip, and convergence velocity) from global convergent margins to investigate the factors controlling along-arc and across-arc variations. Crustal thickness or lithosphere thickness plays a dominant role in elements immobile in aqueous fluids (e.g., Zr/Yb and Nb/Yb). The effect is imposed through mantle partial melting for both frontal arc and rear-/back-arc rocks. Slab thermal structure also affects these immobile elements and gives rise to along-arc variations. Both slab sediment and altered oceanic crust can melt especially in hot subduction zones which yield across-arc variations (e.g., Nd isotope). Aqueous fluids (represented by element ratios such as Ba/Nb and Sr/Nd) also show across-arc variations as they decrease toward rear-/back-arc. This meanwhile decreases mantle wedge melting as rear-/back-arcs show higher Zr/Yb and Nb/Yb. However, no correlations between aqueous fluids and slab parameters suggest aqueous fluids in arc rocks are controlled by complex processes. We summarize factors such as slab alteration, slab dehydration, and mantle metasomatism might impose an effect on the content of fluid mobile elements in arc rocks.
关键词	primitive arc magma crustal thickness slab thermal structure frontal arc rear-arc back-arc along-arc variations across-arc variations
WOS记录号	WOS:000908429500001
收录类别	SCI
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.gig.ac.cn/handle/344008/69901
专题	同位素地球化学国家重点实验室
通讯作者	Wang, Jian
作者单位	1.Cardiff Univ, Sch Earth & Environm Sci, Cardiff, Wales 2.Carleton Univ, Dept Earth Sci, Ottawa, ON, Canada 3.Chinese Acad Sci, Guangzhou Inst Geochem, State Key Lab Isotope Geochem, Guangzhou, Peoples R China 4.China Univ Geosci, State Key Lab Geol Proc & Mineral Resources, Beijing, Peoples R China 5.Ocean Univ China, Key Lab Submarine Geosci & Prospecting Tech, Qingdao, Peoples R China
推荐引用方式 GB/T 7714	Wang, Jian,Gleeson, Matthew,Smith, William D. D.,et al. The factors controlling along-arc and across-arc variations of primitive arc magma compositions: A global perspective[J]. FRONTIERS IN EARTH SCIENCE,2022,10:14.
APA	Wang, Jian.,Gleeson, Matthew.,Smith, William D. D..,Ma, Lin.,Lei, Zhibin.,...&Chen, Long.(2022).The factors controlling along-arc and across-arc variations of primitive arc magma compositions: A global perspective.FRONTIERS IN EARTH SCIENCE,10,14.
MLA	Wang, Jian,et al."The factors controlling along-arc and across-arc variations of primitive arc magma compositions: A global perspective".FRONTIERS IN EARTH SCIENCE 10(2022):14.