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Integrated Gravity and AMT Survey in Exploration of Primary Tin Deposit
- Publisher: European Association of Geoscientists & Engineers
- Source: Conference Proceedings, EAGE-HAGI 1st Asia Pacific Meeting on Near Surface Geoscience and Engineering, Apr 2018, Volume 2018, p.1 - 5
Abstract
An integrated Geophysical survey are Gravity and AMT has been carried out in Bangka Island to make a delineation of granite that is thought to be the source of tin mineralization.
Gravity anomalies show a high density around the edge of the maps, this high anomaly coincide with metasediment. While the low anomaly is related with alteration zone that surrounded the medium anomaly, it is interpreted as granite.
AMT inversion show an anomaly that confirmed the existence of granite which high density and high resistivity. This is supported by the existence of the low resistivity and low density as kaolin alteration zone that surrounded the anomaly.
The two fault direction are shown by Gravity map and also evident in AMT data. Fault with the trend of NW-SE from Gravity map is coincide with AMT Section, there is a low resistivity contrast extended downward that looks like a fault. On the other side, the high resistivity and high density is highly probable a metasediment unit which is resistive and dense but slipped NE-SW as shown in the gravity map.
The Gravity and AMT surveys delineated the existence of potential of the primary tin deposit of the granite at Bangka Island.