Analysis of The Subsurface Structure of the Geothermal Potential Area Based on Magnetic Data (Case Study in Blue Mountain-North Nevada)

Abstract

. Energy is an absolute necessity in human life and its availability has a significant influence on the progress of development. One of renewable energy sources exist all the time is geothermal. The magnetic method is one of the advanced exploration techniques in geothermal observations. Magnetic methods are used to determine the magnetic properties of rocks and subsurface geological structures based on magnetic field anomalies. Knowing the subsurface geological structure will be very helpful in interpreting the basic system and faults that may be used as a path for geothermal fluids to escape. This study is an analysis of the magnetization of the earth’s surface from the acquisition of magnetic susceptibility values. Geothermal causes the value of the magnetic anomaly to be low because a demagnetization process removes the rock’s magnetic properties. Mag2dc software is used to determine the earth’s subsurface structure in 2 dimensions. In the modeling obtained, there is magnetic susceptibility contrast which is negative and that is at a depth close to the earth’s core. This area indicates the existence of a geothermal source. In the modelling there are three types of rocks that make up the subsurface structure: granitic, volcanic, and sedimentary rocks.