Source Depth Estimation From Gravity Data Over Bihar Mica Belt, India by Continuous Wavelet Transfor

Abstract

Abstract

Main complications in interpretation of potential field data are caused due to the insufficient information about the geology of the area. To get rid of such complications there are many method have been developed in order to better interpretation. Wavelet transform method is one of them. Wavelet transform is a well-known method to characterize the potential field anomaly. The continuous wavelet transform (CWT) is used to interpret the source and its location by shifting the information into a secondary space. This method has been verified on various synthetic sources (cylindrical and spherical) anomalies and applied to gravity data of Bihar mica belt and surrounding areas. To find depth of causative sources satellite gravity data has been used.

Results shows that there is a maximum source depth is about 4.5 km in northern side while 3.9 km in southern side of for profile AA′. Maximum depth of profile BB′ ranges 2.5 km - 2.9 km western and eastern side of the profile respectively. Moreover the source depth is about 2 km of the profile CC′ using satellite gravity data, it is concluded that mean depth of causative sources decreases slowly from south to north over this profile which directs thickness of sediments. The method contributes an important role to locate mean depth of the causative sources without any priori information which can be used in interpretation of potential field data as an initial model in any inversion algorithm.

AAPG Datapages/Search and Discovery Article #90260 © 2016 AAPG/SEG International Conference & Exhibition, Cancun, Mexico, September 6-9, 2016