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All Journal IJOG : Indonesian Journal on Geoscience Eksplorium : Buletin Pusat Pengembangan Bahan Galian Nuklir Indonesian Journal on Geoscience Indonesian Journal on Geoscience
Noor Cahyo Aryanto
Pusat Penelitian dan Pengembangan Geologi Kelautan Jln. Dr. Djundjunan 236 Bandung 40174
Earth & Planetary Sciences Engineering Social Sciences

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Penyebaran dan Karakteristik Zirkon Dasar Laut sebagai Endapan Sekunder di Perairan Singkawang dan sekitarnya, Kalimantan Barat Aryanto, Noor Cahyo; Kurnio, H.
Indonesian Journal on Geoscience Vol 5, No 2 (2010)
Publisher : Geological Agency

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1725.606 KB) | DOI: 10.17014/ijog.v5i2.98

Abstract

DOI: 10.17014/ijog.v5i2.98The abundance of sea floor zircon mineral in the studied area was found at the southwest of Kabung Island (SKWL-56) which was accumulated in silty sand sediments at 23 m water depth. Based on the grain mineragraphy analysis, this mineral has various characteristics: rose, white, and brownish yellow colours, elongated prismatic crystals, and translucent to transparent appearances. The distribution profile lines have shown that the distribution of seafloor zircon tends to decrease from Kabung and its surrounding areas to Lemukutan, and from Kabung to the Land of Kalimantan. Considering the abundances, distribution, crystal shape, and mineral association, the zircon mineral in the studied area is a placer deposit that was produced by transport processes characterized by the changing form of crystal. Some samples observed, showed corrosion marks due to a transportation activity, while the transparent level change of these minerals was suggested to be due to much penetration into cavities in the mineral, which lead to the presence of gangue material during the deposition process.
Karakteristik Intensitas Radioaktivitas Batuan dan Sedimen Terpilih di Pantai Sedau, Kalimantan Barat Aryanto, Noor Cahyo Dwi; Suparka, Emmy; Permana, Haryadi
Eksplorium Buletin Pusat Teknologi Bahan Galian Nuklir Vol 36, No 2 (2015): November 2015
Publisher : Pusat Teknologi Bahan Galian Nuklir - BATAN

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (30.019 KB)

Abstract

Intensitas pancaran unsur radioaktif berdasarkan data aktivitas batuan dan aktivitas pancaran ß serbuk di Pantai Sedau dilakukan menggunakan metode analisis Spektrometer Gamma dan alat cacah ß terhadap sembilan contoh sedimen dan batuan. Intensitas radioaktif batuan memperlihatkan kisaran U238 dari 0,1202 ± 0,008 Bq/25gr hingga 0,4348 ± 0,005 Bq/25gr;  Th232 0,0768 ± 0,005 Bq/25gr hingga 0,4812 ± 0,015 Bq/25gr; sedangkan intensitas gross gammanya berkisar dari 1,0503 ± 0,029 Bq/25gr  hingga 5,6433 ± 0,273 Bq/25gr. Semua contoh yang memiliki intensitas unsur radioaktif untuk aktivitas batuan tinggi berasal dari batuan yang sama (monzogranit), yaitu di lokasi SKP08-04. Hasil yang sama pada pancaran ß serbuknya yang memperlihatkan aktivitas  ß gross tertinggi juga terjadi di lokasi SKP08-04 pada batuan monzogranit dengan intensitas paparan 0,370 ± 0,025 Bq/25gr. Berdasarkan pengamatan petrografi, monzogranit di SKP08-04 memperlihatkan pelimpahan feldspar dengan kondisi yang relatif belum teralterasi sedangkan berdasarkan analisis geokimia memperlihatkan afinitas berupa seri kalk-alkali yang tinggi potasium. Kata kunci: intensitas pancaran radioaktif, aktivitas batuan, paparan serbuk, monzogranit, Pantai Sedau
Penyebaran dan Karakteristik Zirkon Dasar Laut sebagai Endapan Sekunder di Perairan Singkawang dan sekitarnya, Kalimantan Barat Aryanto, Noor Cahyo; Kurnio, H.
Indonesian Journal on Geoscience Vol 5, No 2 (2010)
Publisher : Geological Agency

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1725.606 KB) | DOI: 10.17014/ijog.5.2.127-135

Abstract

DOI: 10.17014/ijog.v5i2.98The abundance of sea floor zircon mineral in the studied area was found at the southwest of Kabung Island (SKWL-56) which was accumulated in silty sand sediments at 23 m water depth. Based on the grain mineragraphy analysis, this mineral has various characteristics: rose, white, and brownish yellow colours, elongated prismatic crystals, and translucent to transparent appearances. The distribution profile lines have shown that the distribution of seafloor zircon tends to decrease from Kabung and its surrounding areas to Lemukutan, and from Kabung to the Land of Kalimantan. Considering the abundances, distribution, crystal shape, and mineral association, the zircon mineral in the studied area is a placer deposit that was produced by transport processes characterized by the changing form of crystal. Some samples observed, showed corrosion marks due to a transportation activity, while the transparent level change of these minerals was suggested to be due to much penetration into cavities in the mineral, which lead to the presence of gangue material during the deposition process.
Penyebaran dan Karakteristik Zirkon Dasar Laut sebagai Endapan Sekunder di Perairan Singkawang dan sekitarnya, Kalimantan Barat Aryanto, Noor Cahyo; Kurnio, H.
Indonesian Journal on Geoscience Vol 5, No 2 (2010)
Publisher : Geological Agency

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.17014/ijog.5.2.127-135

Abstract

DOI: 10.17014/ijog.v5i2.98The abundance of sea floor zircon mineral in the studied area was found at the southwest of Kabung Island (SKWL-56) which was accumulated in silty sand sediments at 23 m water depth. Based on the grain mineragraphy analysis, this mineral has various characteristics: rose, white, and brownish yellow colours, elongated prismatic crystals, and translucent to transparent appearances. The distribution profile lines have shown that the distribution of seafloor zircon tends to decrease from Kabung and its surrounding areas to Lemukutan, and from Kabung to the Land of Kalimantan. Considering the abundances, distribution, crystal shape, and mineral association, the zircon mineral in the studied area is a placer deposit that was produced by transport processes characterized by the changing form of crystal. Some samples observed, showed corrosion marks due to a transportation activity, while the transparent level change of these minerals was suggested to be due to much penetration into cavities in the mineral, which lead to the presence of gangue material during the deposition process.
Co-Authors Emmy Suparka, Emmy H. Kurnio Haryadi Permana Kurnio, H.