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Integrated Radiometric Mapping using Field Based and Remote Sensing Techniques for Uranium and Thorium Exploration at Mamuju Region, West Sulawesi, Indonesia

Indrastomo, Frederikus Dian and Sukadana, I Gde and Saepuloh, Asep and Handoyo, Agus (2015) Integrated Radiometric Mapping using Field Based and Remote Sensing Techniques for Uranium and Thorium Exploration at Mamuju Region, West Sulawesi, Indonesia. In: Joint Convention Balikpapan 2015 HAGI-IAGI-IAFMI-IATMI, 5–8 October 2015, Balikpapan.

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Abstract

Mamuju Region in West Sulawesi, Indonesia is a “green” field area of uranium/thorium in Indonesia. High radiometric concentrations were located in Adang Volcanic Rocks. This formation is grouped as basaltic to intermediate rock and composed by lava, pyroclastic rocks, and tuff. Regional field radiometric mapping, including radiation dose rates, potassium, uranium, and thorium contents of soil and rock was conducted to identify the existence of radioactive minerals and prospect zones. Some radiometric anomalies are detected and probably related to hydrothermal alteration, leaching, and precipitation processes. Uranium anomaly (97,261 ppm) located in Mamuju River upstream, Botteng, Takandeang and Ahu area. The anomaly related to uranium leaching and precipitation processes in leucite basalt lava. Thorium anomaly (369,461 ppm) located in Pangasaan, Takandeang, Ahu, and Taan area. To expand this radiometric mapping, we characterized the reflectance of Landsat-8 imagery based on field measurement data. Based on circular structures identification, uranium/thorium anomaly are related to the existence of volcano vents on Adang Volcanic. Based on band rationing, high uranium contents distributed in the area with less ferromagnesian mineral, while thorium did not affected. These field based and remote sensing characterization results could be used as preliminary parameters to identify wide and detail prospects.

Item Type: Conference or Workshop Item (Paper)
Uncontrolled Keywords: radioactive, uranium, thorium, mamuju, Landsat-8.
Subjects: Daur Bahan Bakar Nuklir dan Bahan Maju > Bahan Galian Nuklir > Teknik Eksplorasi Bahan Galian Nuklir
Divisions: Pusat Teknologi Bahan Galian Nuklir
Depositing User: USER PTBGN BATAN
Date Deposited: 07 May 2018 07:42
Last Modified: 07 May 2018 07:42
URI: http://repo-nkm.batan.go.id/id/eprint/1084

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