CHAPTER: Gravitational Field Data Modeling and Interpretation

Abstract

Abstract In order to interpret observed earth gravitational field, it is assumed that the surface is homogenous and the gravity fluctuation occurs only underground. A number of corrections of the data is applied to compensate for these fluctuations before modelling is performed. Gravity data in the form of Bouguer anomaly is obtained by correcting the measured gravity for the effects of latitude and topography and other minor corrections that allows for a clearer view of subsurface density. Variations in Bouguer Anomalies provide crucial information about the variations in earths subsurface rock distributions. Gravitational-field interpretation involve the qualitative and quantitative analysis of gravity data to derive reasonable and acceptable models that provide valuable insights into Earth's subsurface which in turn supports geological exploration results and resource assessment. The Bouguer gravity is analysed and modelled to estimate density-depth distribution. Examples of applications in geotechnical, petroleum, groundwater, regional crustal and tectonic models using different 2D and3D soft wares were provided here.