Crustal structure study based on principal component analysis of receiver functions

doi:10.1007/s11430-018-9341-9

CORC > 地质与地球物理研究所 > 中国科学院地质与地球物理研究所 > 岩石圈演化国家重点实验室

	Crustal structure study based on principal component analysis of receiver functions
	Zhang, Jianyong 1,2; Chen, Ling 1,2,3; Wang, Xu 1,2
刊名	SCIENCE CHINA-EARTH SCIENCES
	2019-07-01
卷号	62 期号:7 页码:1110-1124
关键词	Principal component analysis Receiver function Crustal structure Dipping discontinuity Anisotropy Sichuan Basin
ISSN号	1674-7313
DOI	10.1007/s11430-018-9341-9
英文摘要	The receiver function (RF) technique is an effective method for studying crustal structure. For a single station, the average 1-D crustal structure is usually derived by stacking the radial RFs from all back-azimuths, whereas structural variations (such as dipping discontinuities or anisotropy) can be constrained through analysis of waveform dependence on the back-azimuth of both the radial and tangential RFs. However, it is often difficult to directly extract information about structural variations from the waveform of RF, due to the common presence of noise in real data. In this study, we proposed a new method to derive structural variation information for individual stations by applying principal component analysis (PCA) to RFs sorted by back-azimuth. In this method (termed as RF-PCA), a set of principal components (PCs), which are uncorrelated with each other and reflect different characteristics of the RF data, were extracted and utilized separately to reconstruct new RFs. Synthetic tests show that the first PC of the radial RFs contains the average structural information of the crust beneath the corresponding station, and the second PC of the radial RFs and the first PC of the tangential RFs both reflect the variations of the crustal structure. Our synthetic modeling results indicate that the new RF-PCA method is valid for a variety of synthetic models with intra-crustal dipping discontinuities and/or anisotropy. We applied this method to the real data from a broadband temporary seismic station (s233) in the central part of the Sichuan Basin. The results suggest that the RF data can be best explained by the presence of two nearly parallel dipping discontinuities within the crust. Combining with previous logging data, seismic exploration and deep sounding observations, we interpret the shallow dipping discontinuity as the top boundary of the Precambrian crystalline basement of the Sichuan Basin and the deep one corresponding to the Conrad interface between the upper and lower crust, consistent with the geological feature of the study area. In this work, both synthetic tests and real data application results demonstrate the effectiveness of the RF-PCA method for studying crustal structures.
资助项目	National Natural Science Foundation of China[41688103] ; State Key Laboratory of the Lithospheric Evolution, IGGCAS[SKL-Z201704-11712180]
WOS关键词	LARGE IGNEOUS PROVINCE ; SEISMIC ANISOTROPY ; ADJACENT REGIONS ; TIBETAN PLATEAU ; BENEATH ; BASIN ; DEFORMATION ; CONVERSIONS ; EASTERN ; CHINA
WOS研究方向	Geology
语种	英语
出版者	SCIENCE PRESS
WOS记录号	WOS:000469804300005
资助机构	National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; State Key Laboratory of the Lithospheric Evolution, IGGCAS ; State Key Laboratory of the Lithospheric Evolution, IGGCAS ; State Key Laboratory of the Lithospheric Evolution, IGGCAS ; State Key Laboratory of the Lithospheric Evolution, IGGCAS ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; State Key Laboratory of the Lithospheric Evolution, IGGCAS ; State Key Laboratory of the Lithospheric Evolution, IGGCAS ; State Key Laboratory of the Lithospheric Evolution, IGGCAS ; State Key Laboratory of the Lithospheric Evolution, IGGCAS ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; State Key Laboratory of the Lithospheric Evolution, IGGCAS ; State Key Laboratory of the Lithospheric Evolution, IGGCAS ; State Key Laboratory of the Lithospheric Evolution, IGGCAS ; State Key Laboratory of the Lithospheric Evolution, IGGCAS ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; State Key Laboratory of the Lithospheric Evolution, IGGCAS ; State Key Laboratory of the Lithospheric Evolution, IGGCAS ; State Key Laboratory of the Lithospheric Evolution, IGGCAS ; State Key Laboratory of the Lithospheric Evolution, IGGCAS
内容类型	期刊论文
源URL	[http://ir.iggcas.ac.cn/handle/132A11/92253]
专题	地质与地球物理研究所_岩石圈演化国家重点实验室
通讯作者	Chen, Ling
作者单位	1.Chinese Acad Sci, Inst Geol & Geophys, State Key Lab Lithospher Evolut, Beijing 100029, Peoples R China 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 3.CAS Ctr Excellence Tibetan Plateau Earth Sci, Beijing 100101, Peoples R China
推荐引用方式 GB/T 7714	Zhang, Jianyong,Chen, Ling,Wang, Xu. Crustal structure study based on principal component analysis of receiver functions[J]. SCIENCE CHINA-EARTH SCIENCES,2019,62(7):1110-1124.
APA	Zhang, Jianyong,Chen, Ling,&Wang, Xu.(2019).Crustal structure study based on principal component analysis of receiver functions.SCIENCE CHINA-EARTH SCIENCES,62(7),1110-1124.
MLA	Zhang, Jianyong,et al."Crustal structure study based on principal component analysis of receiver functions".SCIENCE CHINA-EARTH SCIENCES 62.7(2019):1110-1124.