<![CDATA[Andesite is a vital industrial mineral commodity widely utilized as construction material, necessitating accurate information regarding its geometry and resource potential. To address the data requirements for construction material exploration, a geophysical investigation was conducted to estimate andesite resources using the 2-dimensional (2D) geoelectrical resistivity method in Dukuh Gunung Kukusan, Hargorejo Village, Kokap District, Kulon Progo Regency, Special Region of Yogyakarta. Field data acquisition was carried out on four survey lines utilizing the Wenner-Schlumberger configuration. The data processing stage involved 2D inversion using RES2DINV software, followed by 3-dimensional block modeling via Geosoft Oasis Montaj for volume calculation. Interpretation results indicate that fresh andesite is characterized by relatively high resistivity values, ranging from 1000–1870 Ωm, whereas weathered andesite is characterized by lower resistivity values, ranging from 300–800 Ωm. Fresh andesite is identified starting at an average depth of ± 15 meters below the surface, exhibiting a distribution pattern extending from Southwest to Northeast, which aligns with the regional geological structure. Based on 3-dimensional modeling, the estimated volume of fresh andesite resources is 95,875 m3 and the volume of weathered andesite is 160,125 m3. The results of this study are expected to provide valuable preliminary information for planning the utilization of andesite resources and serve as a reference for the application of the 2D electrical resistivity method in the exploration of construction rocks.]]>
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