气候变化领域集成服务门户(CCPortal): Crustal Structure of Sri Lanka Derived From Joint Inversion of Surface Wave Dispersion and Receiver Functions Using a Bayesian Approach

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DOI	10.1029/2019JB018688
	Crustal Structure of Sri Lanka Derived From Joint Inversion of Surface Wave Dispersion and Receiver Functions Using a Bayesian Approach
	Dreiling J.; Tilmann F.; Yuan X.; Haberland C.; Seneviratne S.W.M.
发表日期	2020
ISSN	21699313
卷号	125 期号:5
英文摘要	We study the crustal structure of Sri Lanka by analyzing data from a temporary seismic network deployed in 2016–2017 to shed light on the amalgamation process from a geophysical perspective. Rayleigh wave phase dispersion curves from ambient noise cross correlation and receiver functions were jointly inverted using a transdimensional Bayesian approach. The Moho depths in Sri Lanka range between 30 and 40 km, with the thickest crust (38–40 km) beneath the central Highland Complex (HC). The thinnest crust (30–35 km) is found along the west coast, which experienced crustal thinning associated with the formation of the Mannar Basin. VP/VS ratios lie within a range of 1.60–1.82 and predominantly favor a felsic to intermediate bulk crustal composition with a significant silica content of the rocks. A major intracrustal (18–27 km), slightly westward dipping (∼4.3°) interface with high VS (∼4 km/s) underneath is prominent in the central HC, continuing into the western Vijayan Complex (VC). The discontinuity might have been part of the respective units prior to the collision and could be an indicator for the proposed tilting of the Wanni Complex/HC crustal sections. It might also be related to the deep crustal HC/VC thrust contact with the VC as an indenting promontory of high VS. A low-velocity zone in the central HC could have been caused by fluid influx generated by the thrusting process. ©2020. The Authors.
语种	英语
来源期刊	Journal of Geophysical Research: Solid Earth
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/187845
作者单位	Department of Geophysics, Helmholtz-Zentrum Potsdam, German Research Centre for Geosciences (GFZ), Potsdam, Germany; Institute for Geological Sciences, Freie Universität Berlin, Berlin, Germany; Geological Survey and Mines Bureau (GSMB), Pitakotte, Sri Lanka
推荐引用方式 GB/T 7714	Dreiling J.,Tilmann F.,Yuan X.,et al. Crustal Structure of Sri Lanka Derived From Joint Inversion of Surface Wave Dispersion and Receiver Functions Using a Bayesian Approach[J],2020,125(5).
APA	Dreiling J.,Tilmann F.,Yuan X.,Haberland C.,&Seneviratne S.W.M..(2020).Crustal Structure of Sri Lanka Derived From Joint Inversion of Surface Wave Dispersion and Receiver Functions Using a Bayesian Approach.Journal of Geophysical Research: Solid Earth,125(5).
MLA	Dreiling J.,et al."Crustal Structure of Sri Lanka Derived From Joint Inversion of Surface Wave Dispersion and Receiver Functions Using a Bayesian Approach".Journal of Geophysical Research: Solid Earth 125.5(2020).