气候变化领域集成服务门户(CCPortal): Time-Dependent Crustal Accretion on the Southeast Indian Ridge Revealed by Malaysia Airlines Flight MH370 Search

CCPortal

DOI	10.1029/2020GL087349
	Time-Dependent Crustal Accretion on the Southeast Indian Ridge Revealed by Malaysia Airlines Flight MH370 Search
	Parnell-Turner R.; Sim S.J.; Olive J.-A.
发表日期	2020
ISSN	0094-8276
卷号	47 期号:12
英文摘要	Our understanding of oceanic crustal formation is mostly limited to observations of young crust formed in the past several million years, due to the thick sediments on older crust and the remote location of many spreading centers. Here we use 40 m-resolution bathymetric data collected over hundreds of square kilometers during the search for Malaysia Airlines Flight 370 on the flank of the Southeast Indian Ridge, which provides a record of crustal accretion from 11–23 Ma. Spectra calculated from the data show a characteristic timescale of 300–400 kyr and no evidence for periodicity coinciding with glacial cycles. This characteristic timescale could be explained by fluctuations in melt supply and the amount of faulting, leading to variations in crustal thickness. We show that this timescale of variation is consistent with porosity waves observed in a two-phase flow model, which persist over millions of years. ©2020. American Geophysical Union. All Rights Reserved.
英文关键词	Structural geology; Two phase flow; Bathymetric data; Crustal formation; Crustal thickness; Glacial cycles; Malaysia airlines; Remote location; Southeast Indian Ridge; Two phase flow model; Air transportation; accretion; aircraft; bathymetry; crustal structure; crustal thickness; fault; glacial environment; meltwater; porosity; sediment thickness; time dependent behavior; Indian Ocean; Mid-Indian Ridge; Southeast Indian Ridge
语种	英语
来源期刊	Geophysical Research Letters
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/170206
作者单位	Institute of Geophysics and Planetary Physics, Scripps Institution of Oceanography, University of California, San Diego, CA, United States; Department of Terrestrial Magnetism, Carnegie Institution for Science, Washington, Washington, DC, United States; Laboratoire de Géologie, Ecole Normale Supérieure/CNRS UMR 8538, PSL Research University, Paris, France
推荐引用方式 GB/T 7714	Parnell-Turner R.,Sim S.J.,Olive J.-A.. Time-Dependent Crustal Accretion on the Southeast Indian Ridge Revealed by Malaysia Airlines Flight MH370 Search[J],2020,47(12).
APA	Parnell-Turner R.,Sim S.J.,&Olive J.-A..(2020).Time-Dependent Crustal Accretion on the Southeast Indian Ridge Revealed by Malaysia Airlines Flight MH370 Search.Geophysical Research Letters,47(12).
MLA	Parnell-Turner R.,et al."Time-Dependent Crustal Accretion on the Southeast Indian Ridge Revealed by Malaysia Airlines Flight MH370 Search".Geophysical Research Letters 47.12(2020).