Журнал дистанционного зондирования и ГИС

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Mapping of the Bedrock Topography Using Gravity Data: A Case Study in the South of Hormozgan Province, Iran

Payam Salimi, Asghar Teymorian Motlagh

Modeling of gravity data is used extensively to illustrate the geometry and interface between the sediments and bedrock. There are various methods to illustrate the bedrock topography, and we will describe one of these methods in present paper. Using the upward continuation, we extract the residual gravity anomaly which in fact shows the local effect of bedrock gravity on the observed gravity. Then, according to the following method, the residual gravity data are inversed. The topography of a slab with infinite horizontal size which is considered with flat bottom and wavy top and by a uniform density contrast with respect to upper layers has been inversed while all calculations are carried out in Fourier domain. It should be noted that some softwares like Surfer and Excel are used in this research but the program main code is written using Matlab programming. Using the data from gravimetry performed in south of Hormozgan province, this method has been utilized to determine the bedrock topography and the results were in accordance with the local geology.