气候变化领域集成服务门户(CCPortal): Variations in faulting style of the Southwest Indian Ridge (46°–53.5°E): Implications for crustal accretion process at ultraslow-spreading ridges

CCPortal

DOI	10.1016/j.tecto.2020.228552
	Variations in faulting style of the Southwest Indian Ridge (46°–53.5°E): Implications for crustal accretion process at ultraslow-spreading ridges
	Liu C.; Li J.; Tao C.; Fan Q.; Song J.; Luo Y.; Feng B.
发表日期	2020
ISSN	00401951
卷号	790
英文摘要	The variations in faulting style at the Southwest Indian Ridge (SWIR) 46°–53.5°E segment, correspond to different patterns of crustal accretion under different magma supply in an ultraslow-spreading ridge. We use multi-beam and filtered bathymetry to identify the fault characteristics and measure the fraction of magmatic accretion M and axial valley depth D. Four styles of faulting, namely, mode-C, mode-E, one-side detachment, and flip-flop detachment faults, are identified in the study area. The heave of these four faulting styles tends to increase gradually, and these faults can be progressive evolve in order from symmetrical to asymmetrical spreading. The reducing M significantly affects the faulting styles from mode-C to mode-E faults by largening fault heave, resulting in a deeper D at mode-E faults. However, there was no significant difference in M and D from mode-E to one-side detachment faults with the increase of heave. We consider that more magma may preferentially intrude into the asthenosphere at one-side detachment faults. Moreover, the flip-flop detachment faults are developed at the amagmatic segments, constrained by the extreme low M, talc- serpentinization, and dense transform faults. © 2020 Elsevier B.V.
关键词	Amagmatic segment Detachment fault Magma supply Multi-beam bathymetry Southwest Indian Ridge
英文关键词	Transform faults; Accretion process; Amagmatic segment; Detachment fault; Fault characteristics; Serpentinization; Southwest Indian Ridge; Study areas; Ultra-slow spreading; Flip flop circuits; accretion; bathymetry; crustal structure; detachment fault; faulting; heave; magma; Indian Ocean; Mid-Indian Ridge
语种	英语
来源期刊	Tectonophysics
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/207812
作者单位	Division of Geology and Mineral Resources, Beijing Research Institute of Uranium Geology, Beijing, 100029, China; The Key Laboratory of Orogenic Belts and Crustal Evolution, School of Earth and Space Sciences, Peking University, Beijing, 100871, China; Key Laboratory of Submarine Geosciences, Second Institute of Oceanography, Ministry of Natural Resources, Hangzhou, 310012, China
推荐引用方式 GB/T 7714	Liu C.,Li J.,Tao C.,等. Variations in faulting style of the Southwest Indian Ridge (46°–53.5°E): Implications for crustal accretion process at ultraslow-spreading ridges[J],2020,790.
APA	Liu C..,Li J..,Tao C..,Fan Q..,Song J..,...&Feng B..(2020).Variations in faulting style of the Southwest Indian Ridge (46°–53.5°E): Implications for crustal accretion process at ultraslow-spreading ridges.Tectonophysics,790.
MLA	Liu C.,et al."Variations in faulting style of the Southwest Indian Ridge (46°–53.5°E): Implications for crustal accretion process at ultraslow-spreading ridges".Tectonophysics 790(2020).