DOI: 10.1016/j.epsl.2019.115912
论文题名: Evolution and maturation of the nascent Mariana arc
作者: Ribeiro J.M. ; Ishizuka O. ; Lee C.-T.A. ; Girard G.
刊名: Earth and Planetary Science Letters
ISSN: 0012821X
出版年: 2020
卷: 530 语种: 英语
中文关键词: 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
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. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/165235
Appears in Collections: 气候变化与战略
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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
Recommended Citation:
Ribeiro J.M.,Ishizuka O.,Lee C.-T.A.,et al. Evolution and maturation of the nascent Mariana arc[J]. Earth and Planetary Science Letters,2020-01-01,530