Track: Technology Management

Abstract

Estimation of the location of the basaltic intrusion in Karanglewas Village, Jatilawang District, Banyumas Regency has been carried out based on the pseudogravity anomaly map. The amount of the pseudogravity anomalies data is 239 which stretches at 109.107222° – 109.134944° E and 7.561361° – 7.577306° S with values ranging of -115.938 – 124.286 mGal. These data are obtained from the local magnetic anomalies data with values ranging of -2,961.11 – 1,516.31 nT which have been transformed into the pseudogravity anomalies data. The transformation is conducted because the local magnetic anomaly map shows complex closures, making interpretation difficult. Based on the interpretation results of the pseudogravity anomaly contour map, basaltic rocks intrusion is estimated to occur at positions 109.131225° E and 7.569342° S in the form of a dyke structure. At this location, the pseudogravity anomaly map shows the maximum value, which is 124.286 mGal. While to identify the distribution of basaltic intrusion on the surface, horizontal gradient analysis is applied to the pseudogravity anomaly data, so that it can be obtained the basaltic rock distribution patterns oriented from west to east in accordance with the geological map of the study area.