关键词: 接收函数, 最大或然性, 反褶积, 大别山

Abstract: Up to now,all of the methods of isolating the receiver function from teleseismic P waves are based on the data recorded at a single station. However,the estimation of the receiver function based on the so called source equalization scheme will not be valid for broadband data,when a sharp discontinuity exists within the crust. The outlet for solving this problem is to avoid using the source equalization assumption. In this study,we propose a method for isolating the 3 component receiver function from multi channel seismic data based on multi channel maximal likelihood deconvolution princple. The source equalization scheme is avoided in our method,and this is valuable for improving the estimation of the receiver function in case of complex crustal structure. The numerical test by synthetics proves our method to be effective. Using this new method,we obtain the 3 component receiver functions at stations along the passive seismic profile across the Dabieshan orogenic belt from Daqipu (30°20′N,115°03′E) nearby Daye,Jiangxi Province to Cuilin(34°40′N,114°49′E)nearby Lankao,Henan Province. In comparison with the radial components of the receiver function from the data of a single station,it is indicated that the results given by both methods have un negligible differences.

Key words: maximal likelihood, deconvolution, receiver function, Dabieshan