Karakteristik Intensitas Radioaktivitas Batuan dan Sedimen Terpilih di Pantai Sedau, Kalimantan Barat

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Published: Nov 30, 2015
DOI: https://doi.org/10.17146/eksplorium.2015.36.2.2773
Keywords:
intensitas pancaran radioaktif, aktivitas batuan, paparan serbuk, monzogranit, Pantai Sedau

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Noor Cahyo Dwi Aryanto
Puslitbang Geologi Kelautan
Lili Sarmili
Puslitbang Geologi Kelautan
Emmy Suparka
Fakultas Ilmu Teknologi Kebumian, ITB
Haryadi Permana
Pusat Penelitian Geoteknologi LIPI

Abstract

The intensity of the radioactive elements based on the rock activity data and ß powder emission activity on Sedau Coast were done using Gamma Spectrometer analysis method and  ß detector to the nine samples of sediment and rocks. Radioactive intensity of U238 in rocks showed a range from 0.1202 ± 0.008 Bq/ 25gr  to 0.4348 ± 0.005 Bq/ 25gr; Th232 0.0768 ± 0.005 Bq/ 25gr to 0.4812 ± 0.015 Bq/ 25gr; while the gross gamma intensity ranged from 1.0503 ± 0.029 Bq/ 25gr to 5.6433 ± 0.273 Bq/25gr. All the sample that has high intensity of radioactive element, occurs in the same rock (monzogranite) which is from samples in location SKP08-04. The same results in the emission of ß powder, which showed the highest gross ß activity also occurs in the rocks monzogranite (SKP08-04) with exposure intensity was 0.370 ± 0.025 Bq/25gr. Based on petrographic observations, monzogranite in SKP08-04 showed the presence of abundant feldspar with the condition which relatively not altered, whereas the affinity based on geochemical analysis showed a calc-alkaline series of high potassium.

Article Details

How to Cite
Aryanto, N. C. D., Sarmili, L., Suparka, E., & Permana, H. (2015). Karakteristik Intensitas Radioaktivitas Batuan dan Sedimen Terpilih di Pantai Sedau, Kalimantan Barat. EKSPLORIUM, 36(2), 89–96. https://doi.org/10.17146/eksplorium.2015.36.2.2773
Issue
Vol. 36 No. 2 (2015): NOVEMBER 2015
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