Derivative Analysis of Gravity Anomalies and 2D Induced Polarization Inversion to Minimise the Risk of Exploration Failure in Potential Gold Mineralisation Areas Waluran District, Sukabumi Regency, West Java Province Wrego Seno Giamboro , Hafiz Hamdalah, Wahyu Hidayat, Yasmina Amalia, Rosyad Najdan Muttaqin, Abdurrohim Kustanto Putra, Muhammad Zayyan Lorinsi, Amza Maulana
Universitas Pembangunan Nasional Veteran Yogyakarta
Abstract
Gold mining is an activity that has a high risk of failure. Failures in gold mining exploration include determining prospective zones of gold mineralisation in the subsurface that are not mapped properly. As a result, the determination of gold resource estimates becomes inaccurate and there is no definite clue about the image of gold mineralisation in the subsurface. Measurements were conducted on 40 TDIP tracks with electrode spacing of 10 meters and track spacing ranging from 100 to 300 meters and gravity data of the study area obtained via TOPEX satellite in order to cover the whole WIUP area. The agreements with the employer, the size of the research area, geological data, justification, and citizen mining are the foundations of the data acquisition design. Data resistivity and chargeability are dependent on the position of justifications and information mining citizens in order to determine the gold^s mineralization potential. WIUP Waluran is composed of argylic and propylitic alteration zones that have been discovered with changes in resistivity values, according to the overall results of data processing. While the porpylitic alteration zone has a resistiveness range of > 700 Ohm.m., the argilic alteration zone is in the resistivity range of 5 to 500 Ohm.m. The gold^s potential for mineralization in the study region was suggested by a high chargeability value more than 700 msec. The information gathered from the 3D modeling findings on chargability revealed that the reserve value on the WIUP Waluran district of Sukabumi West Java was as much as 7.73 tons, approximately. We suggest six drilling locations, specifically at points of passage 4, 8, 16, 25, 35, and 37, in order to collect high-quality data from the gold mineralization in the study area. Based on Total Horizontal Derivative (THD) and Tilt Derivative (TDR) data, the gravity data shows a fault structure pattern with a southeast - northwest orientation, which is thought to be the carrier structure of gold mineralisation in the study area.
