Identification High Sulphidation Gold Mineralization Zones in the “R” Area Using the Induced Polarization Method

Nisriinaa Nasywaa Ariefianty; Yoqi Ali Taufan; Budy Santoso

doi:10.24036/eksakta/vol27-iss05/733

EKSAKTA: Berkala Ilmiah Bidang MIPA

Open Access

Identification High Sulphidation Gold Mineralization Zones in the “R” Area Using the Induced Polarization Method

Nisriinaa Nasywaa Ariefianty ¹

, Yoqi Ali Taufan ²

, Budy Santoso ¹

¹ Department of Geophysics, Faculty of Mathematics and Natural Science, Universitas Padjadjaran, Bandung, Indonesia

² PT. Puncakbaru Jayatama, Jakarta, Indonesia

Published 2026-09-28

Vol. 27 No. 05 (2026) PAGES 808-827

DOI 10.24036/eksakta/vol27-iss05/733

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Abstract

Sumbawa Island, Indonesia, is part of the Sunda–Banda
magmatic arc and has high potential for gold mineralization,
particularly in high-sulfidation epithermal systems characterized by
abundant sulfide minerals associated with highly acidic magmatic
hydrothermal fluids. However, subsurface gold mineralization in
Sumbawa Regency, West Nusa Tenggara Province, has not been
specifically investigated. This study aims to identify subsurface gold
mineralization zones using the Induced Polarization (IP) method,
which is sensitive to sulfide minerals. Resistivity and chargeability
data were integrated to characterize and delineate mineralization
zones. Results show low resistivity values of 11.7–48.1 Ω·m associated
with hydrothermal alteration and high chargeability values of 126–
826.5 msec indicating disseminated sulfides. The anomalies occur
within andesite host rock, show vertical continuity, and are associated
with fault structures that provide pathways for hydrothermal fluid
circulation. These structures are related to the Flores Back-Arc Thrust
Belt and its splay faults. Integrated resistivity and chargeability
anomalies indicate silicification zones or mineralized quartz veins
containing disseminated sulfides as prospective gold mineralization
targets. These results demonstrate that IP effectively identifies
structurally controlled gold mineralization in high-sulfidation
epithermal systems and improves exploration-zone delineation in
Sumbawa Regency, thereby providing a basis for follow-up
exploration programs and investigations in the area.

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