摘要
The elastic thickness parameter was estimated using the mobile correlation technique between the observed isostatic disturbance and the gravity disturbance calculated through direct gravimetric modeling. We computed the vertical flexure value of the crust for a specific elastic thickness using a given topographic dataset. The gravity disturbance due to the topography was determined after the calculation. A grid of values for the elastic thickness parameter was generated. Then, a moving correlation was performed between the observed gravity data(representing actual surface data) and the calculated data from the forward modeling. The optimum elastic thickness of the particular point corresponded to the highest correlation coefficient. The methodology was tested on synthetic data and showed that the synthetic depth closely matched the original depth, including the elastic thickness value. To validate the results, the described procedure was applied to a real dataset from the Barreirinhas Basin, situated in the northeastern region of Brazil. The results show that the obtained crustal depth is highly correlated with the depth from known models. Additionally, we noted that the elastic thickness behaves as expected, decreasing from the continent towards the ocean. Based on the results, this method has the potential to be employed as a direct estimate of crustal depth and elastic thickness for any region.
作者简介
Corresponding author:Nelson Ribeiro-Filho has a degree in Mathematics from the Federal Institute of Pará(IFPA),a Bachelor's degree in Geophysics from the Federal University of Pará(UFPA)and a Master's degree in Geophysics from the National Observatory(ON).As a Professor,he has experience in teaching Basic Mathematics for Calculus,Differential and Integral Calculus and Linear Algebra.As a Bachelor,he has experience in Modeling and Inversion of Gravimetric and Magnetic Data,Interpretation of Gravimetric and Magnetic Data and Potential Methods applied to Sedimentary Basin Analysis.Currently,he is a graduate student of the Graduate Program in Geophysics at the Federal University of Pará,at the Doctorate level,with research focused on the area of Potential Methods.He is also a Professor of Basic,Technical and Technological Education at the Federal Institute of Pará-Campus Altamira,in the area of Applied,Basic and Computational Mathematics.Instituto Federal do Pará(IFPA),Altamira,Pará,Brazil.E-mail addresses:nelsondelimar@gmail.com,nelson.filho@ifpa.edu.br。
