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All Journal Jurnal Geologi dan Sumberdaya Mineral (Journal of Geology and Mineral Resources)
Tommy Naibaho, Tommy
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Education Energy Engineering Environmental Science

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Depositional Modification In Seram Through, Eastern Indonesia Kusnida, Dida; Naibaho, Tommy; Firdaus, Yulinar
Jurnal Geologi dan Sumberdaya Mineral Vol 17, No 2 (2016): Jurnal Geologi dan Sumberdaya Mineral
Publisher : Pusat Survei Geologi

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (260.569 KB)

Abstract

Seismic reflection profiles considered to represent the morphotectonics of the study area and verified by surficial sedimentary data presented in this paper directed to understand  the sedimentary depositional dynamics.  Seismic data interpretation results show the gradation and sediment facies cycles in accordance with the episode of tectonic activities, which is characterized by the avalanche of the Seram Trough base-of slopes materials. Seismic data reveal more than 1250 meters acoustically chaotic to laminated, indicate fine-grained sediments between slumps at its base of slope and fine marine sediments at the trough floor. Thus, it suggests that the Seram Trough is in the process of differential vertical movement causing depositional modification due to the accretionary prism growths.
Sediment Core from the Seafloor of Aru Trough, West Papua - Indonesia Kusnida, Dida; Naibaho, Tommy
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 | Full PDF (231.882 KB) | DOI: 10.33332/jgsm.geologi.19.1.1-7

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 Dida Kusnida Yulinar Firdaus, Yulinar