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Radioactive Mineral Occurrences on Submarine Alkaline Volcanic Rocks in West Tapalang, Mamuju, West Sulawesi, Indonesia

Sukadana, I Gde and Indrastomo, Frederikus Dian (2016) Radioactive Mineral Occurrences on Submarine Alkaline Volcanic Rocks in West Tapalang, Mamuju, West Sulawesi, Indonesia. In: GEOSEA XIV AND 45TH IAGI ANNUAL CONVENTION 2016 (GIC2016), 10-13 Oktober 2016, Bandung.

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Abstract

Mamuju Region recently has become one of radioactive minerals prospecting area in Indonesia. High radiometric concentration of uranium and thorium in Mamuju are distributed in basaltic to intermediate rocks (foidite to andesite) of Adang Volcanic. Radioactive minerals(uranium and thorium) occurrences were detected by using gamma spectrometer (model RS-125). The field measurements of RS-125 resulted dose rate, uranium and thorium equivalent (eU and eTh) contents of rock and soil. West Tapalang Area, part of Mamuju Region dominantly composed by lava and autobrecciaphonolite rocks. There are three volcanic domes identified in the area. They are Ahu, Labuhan Rano, and Sumare domes. Ahu dome is the biggest domes and characterized by the occurrences of leucite rich lava rocks. Some of the lava around the volcanic neck were formed in pillow lava structure shape. The other domes were composed by autobreccia rocks. Meanwhile, sedimentary rocks (limestones) were distributed in the southern part of the area and some of them were silicified. Based on measurements result, lava and autobreccia phonolite rocks as product of sub marine volcanic are the most radioactive rocks in these area.

Item Type: Conference or Workshop Item (Paper)
Uncontrolled Keywords: submarine volcanic, radioactive minerals, alkaline rocks, West Tapalang
Subjects: Daur Bahan Bakar Nuklir dan Bahan Maju > Bahan Galian Nuklir > Teknik Eksplorasi Bahan Galian Nuklir
Divisions: Pusat Teknologi Bahan Galian Nuklir
Depositing User: Unnamed user with email kurnias@batan.go.id
Date Deposited: 07 May 2018 07:31
Last Modified: 07 May 2018 07:31
URI: http://repo-nkm.batan.go.id/id/eprint/1088

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