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All Journal Jurnal Geologi Kelautan: Media Hasil Penelitian Geologi Kelautan Jurnal Geologi dan Sumberdaya Mineral (Journal of Geology and Mineral Resources)
Dida Kusnida
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Chemistry Earth & Planetary Sciences Energy

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PENAFSIRAN GEOLOGI PERAIRAN SUMUR, UJUNG KULON-BANTEN BERDASARKAN DATA SEISMIK PANTUL SALURAN TUNGGAL Joni Widodo; Dida Kusnida; Lukman Arifin
JURNAL GEOLOGI KELAUTAN Vol 20, No 2 (2022)
Publisher : Pusat Penelitian dan Pengembangan Geologi Kelautan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32693/jgk.20.2.2022.769

Abstract

Perairan Sumur hingga Teluk Lada merupakan bagian dari Selat Sunda, yang secara fisiografi merupakan ujung barat dari Lajur Bogor, Lajur Depresi Tengah dan Lajur Bandung. Untuk menganalisis kondisi geologi bawah laut, dapat dirunut dari geologi darat, yang mengacu pada Geologi Lembar Cikarang 1109-2 yang diterbitkan oleh Pusat Penelitian dan Pengembangan Geologi. Batimetri daerah penelitian memperlihatkan kecenderungan adanya pengaruh struktur geologi terhadap perubahan kedalaman laut, dimana struktur geologi berupa sesar normal dan perlipatan banyak dijumpai di daerah penelitian. Hasil penetrasi seismik dangkal yang dipergunakan secara umum terbatas hingga kedalaman 350 milidetik, atau + 250 m. Terdapat 2 satuan batuan Pliosen (awal dan akhir) dan 4 satuan batuan Pleistosen/Kuarter dari tua ke muda: Q0, Q1, Q2, dan Q3, yang dapat dikenali dari seluruh penampang seismik dangkal di Selat Sunda. 
Sediment Core from the Seafloor of Aru Trough, West Papua - Indonesia Dida Kusnida; Tommy Naibaho
Jurnal Geologi dan Sumberdaya Mineral Vol. 19 No. 1 (2018): Jurnal Geologi dan Sumberdaya Mineral
Publisher : Pusat Survei Geologi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33332/jgsm.geologi.v19i1.334

Abstract

Results of multi-sensor core logger measurement of single sediment core from the Aru Trough are presented in this paper. In this study an effort is to depict the general pattern of seafloor sediment over the study area to its physical characteristics. Microscopic observations of sediments extracted from the top and bottom of the core in general show the presence of shell fragments and foraminiferas (f), mafic minerals (m) and organic residuals of blackish-brownish lignite (l). The physical characteristics of sediment core indicate that the cps value of natural gamma measurement with range of 32-38 is interpreted associated with terrigenous sediment type transported and deposited on the seafloor. Magnetic susceptibility graph spikes of core sample located at depth of 180-185 cm and 195-200 cm of darker sandy silt lens seems to have more prominent values compared to the uniform background values and also indicate that the sediment fill derived and associated with the terrigenous sediment type. The gradually change of velocity gradient in the interval between 45 and 226 cm may reflect a change from a relatively consolidated sediments above 45 cm to poorly consolidated sediments below 45 cm. XRF data show that Th/U ratios = 1.44 (
Co-Authors Joni Widodo Lukman Arifin Tommy Naibaho