气候变化领域集成服务门户(CCPortal): Evolution and maturation of the nascent Mariana arc

CCPortal

DOI	10.1016/j.epsl.2019.115912
	Evolution and maturation of the nascent Mariana arc
	Ribeiro J.M.; Ishizuka O.; Lee C.-T.A.; Girard G.
发表日期	2020
ISSN	0012821X
卷号	530
英文摘要	Long-standing debate remains regarding the processes by which nascent island arcs evolve into thicker-crust, mature volcanic edifices, long before being accreted into continental crust. How mature island arcs maintain their location for millions of years is still unclear. Arc location is currently believed to be controlled by slab dehydration or by the thermal state of the sub-arc mantle. However, most studies have focused on modern island arcs that have developed mature and stable volcanic edifices. Using published geochemical datasets, here we show that the southern Mariana arc is an incipient island arc that evolves into stable, thicker-crust stratovolcanoes to the north. Because it shares similar geochemical features with the early arc that formed during subduction infancy, it can place new important constraints onto the processes that occurred during island arc infancy. Examination of the Mariana arc along a S-N transect suggests that the growth of the serpentinized fore-arc mantle has the potential to modulate the depth of arc magma generation, which allows, in return, stabilization of the volcanic edifices during arc maturation. Arc stabilization further enables the deeply-sourced, slab fluids to infiltrate the sub-arc mantle wedge, which results in magmas with a typical arc fingerprint to the north. Melt focusing along magmatic conduits further promotes magma differentiation, magma-crust assimilation, and subsequent crustal thickening. We further propose that transient magmatic activity may also occur during island arc infancy in the Izu-Bonin-Mariana convergent margin, until serpentinization of the fore-arc mantle develops and stabilizes. © 2019 Elsevier B.V.
关键词	arc location arc maturation fore-arc mantle serpentinization island arc infancy Izu-Bonin-Mariana subduction zone
英文关键词	Geochemistry; Location; Stabilization; Volcanoes; arc maturation; Island arc; Izu-Bonin-Mariana; Serpentinization; Subduction zones; Buildings; island arc; magmatism; maturation; serpentinization; stratovolcano; subduction zone; tectonic evolution; Izu-Bonin Arc; Mariana Arc; Pacific Ocean
语种	英语
来源期刊	Earth and Planetary Science Letters
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/202857
作者单位	Guangzhou Institute of Geochemistry, The Chinese Academy of Sciences, Guangzhou, China; Geological Survey of Japan, AIST, Ibaraki, Japan; Rice University, Earth Science Department, Houston, TX, United States; Department of Geology and Environmental Geosciences, Northern Illinois University, DeKalb, IL, United States; Japan Agency for Marine-Earth Science and Technology, Yokosuka, Japan
推荐引用方式 GB/T 7714	Ribeiro J.M.,Ishizuka O.,Lee C.-T.A.,et al. Evolution and maturation of the nascent Mariana arc[J],2020,530.
APA	Ribeiro J.M.,Ishizuka O.,Lee C.-T.A.,&Girard G..(2020).Evolution and maturation of the nascent Mariana arc.Earth and Planetary Science Letters,530.
MLA	Ribeiro J.M.,et al."Evolution and maturation of the nascent Mariana arc".Earth and Planetary Science Letters 530(2020).