Study of the variation in the value of gravity resulting from basalt intrusions in the area of Massallata and its surroundings using Bouguer gravity anomaly maps

Abstract

In this paper an attempt to locate the sites of basalt intrusion, an analysis and study of Bouguer map was carried out for the area, which lies between two circles of width 32,250 - 32,360 north, and between longitudes 14.30 - 13.49 east. The paper included processing the gravity data and separating the gravity anomaly from each other using the derivatives method Interpretation of gravity data was performed using the modeling program (2D, 3D), which aims to create a geological profile that shows the third dimension of the distribution of different rocks, and rather olivine and phenolitic basalt intrusions in the study area depending on the vertical distribution of density, which is reflected in the values of the gravity anomalies in the contour map of the region. Basalt does not have wide openings in the study area, but it is found in the form of dikes in irregularly sprawling areas, especially those that are considered areas of sculpture by the action of running water in the valleys As for the southeastern region of the study area, olivine basalt rocks were found at a depth of 3 - 5 meters, and they are deaf, which indicates their crystallization under the surface of the earth, especially in the area of the Tarhuna agricultural project. Keywords: Basalt intrusions, Bouguer gravity anomaly, Geological profile, Rock density.