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Estimation of Crustal and Upper Mantle Configuration of Dhanbad Region Using Receiver Function Analysis
- Publisher: European Association of Geoscientists & Engineers
- Source: Conference Proceedings, 78th EAGE Conference and Exhibition 2016, May 2016, Volume 2016, p.1 - 3
Abstract
In this work, we have tried to study the crustal and upper mantle properties through receiver function analysis. A total of 115 teleseismic events have been recorded by broadband three-component seismological station set up at Indian School of Mines, Dhanbad having magnitude greater than 5.5. Out of 115 events, 49 best events have been chosen for the generation of receiver function. Receiver function is a mathematical approach which has been implied in identification of various crustal characteristics specially Mohorovicic discontinuity (Crustal Depth). These characteristics are studied by the information carried out by teleseismic waveform which includes aberrations from mantle and local anomalies beneath the recording site and source time function. The estimation of receiver function mainly involves two processes that are rotation of the components of recorded seismogram and deconvolution. The estimated receiver function has radial and transverse time series function showing the arrival time of converted P wave phases at the recording station. Zhu and kanamori (2000) stacking algorithm has used to find the average Vp/Vs ratio and Crustal thickness. The estimated Vp/Vs ratio is 1.84 and Crustal depth is 43.4 km. Further the neighborhood Algorithm has been applied to generate the 1-D velocity model of the concerned region