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All Journal IJOG : Indonesian Journal on Geoscience Jurnal Geologi dan Sumberdaya Mineral (Journal of Geology and Mineral Resources) Indonesian Journal on Geoscience Indonesian Journal on Geoscience
Dida Kusnida
Marine Geological Institute, Jl. Dr. Djundjunan 236 Bandung 40174
Earth & Planetary Sciences Education Energy Engineering Environmental Science

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Journal : Indonesian Journal on Geoscience

 1 
Deep Sea Sediment Gravity Flow Deposits in Gulf of Tomini, Sulawesi Kusnida, Dida; Subarsyah, Subarsyah
Indonesian Journal on Geoscience Vol 3, No 4 (2008)
Publisher : Geological Agency

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.17014/ijog.3.4.217-224

Abstract

http://dx.doi.org/10.17014/ijog.vol3no4.20084Micro plate collision against the Eastern Arm of Sulawesi since Pliocene has resulted in a major supply of terigenous sediments into Late Miocene rift-basins in Gulf of Tomini. Studies on offshore multi-channel seismic reflection data complemented by published on-land geological data indicate a series of tectonic events that influenced the depositional system in the Gulf of Tomini. During the Late Neogene, alternating pulses of terigenous sediments were deposited in the basins in the form of deep-sea slump-turbidite-pelagic sediments. A sediment gravity flow deposit system at the slope and the base of the basins changed gradually into a deep-sea pelagic fill system toward the center of the basins. Three tectono-stratigraphy sequences (A, B, and C) separated by unconformities indicating the Late Neogene history and the development of the basins were identified. These tectonic processes imply that the earlier sediments in the Gulf of Tomini are accomplished by a differential subsidence, which allows a thickening of basin infill. The Pliocene-Quaternary basin fill marks the onset of a predominant gravity flow depositional system  
Basement Configuration of the Tomini Basin deduced from Marine Magnetic Interpretation Kusnida, Dida; Subarsyah, Subarsyah; Nirwana, B.
Indonesian Journal on Geoscience Vol 4, No 4 (2009)
Publisher : Geological Agency

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.17014/ijog.4.4.269-274

Abstract

DOI: 10.17014/ijog.v4i4.86This paper presents the result of marine magnetic survey in Tomini Basin, Central Indonesia. On the basis of marine magnetic modeling, the main structural and geological elements of the basement of Tomini Basin are identified. At the centre of the basin, the up-doming feature points to an elevated magnetic susceptibility value. A geological model indicates that the entire basement of Tomini Basin is characterized by an oceanic-like crust with a basin axis at the centre nearly an east-west direction and suggests a rift-related graben.
Paleocene postgenetic Accumulation of Nannoplankton on the Phillipsite Minerals in Roo Rise, Indian Ocean Adisaputra, Mimin Karmini; Kusnida, Dida
Indonesian Journal on Geoscience Vol 5, No 1 (2010)
Publisher : Geological Agency

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.17014/ijog.5.1.49-56

Abstract

DOI: 10.17014/ijog.v5i1.92The sample studied was derived from the base of core MD 982156, one of the boreholes obtained during the IMAGES Expedition. The expedition was carried out as a research cooperation between Indonesia and French Governments using Marion Dufresne Research Vessel, belonging to IFRTP (French Institute for Polar Research). Within this sample, the phillipsite minerals were firstly found by the first author. Using SEM (Scanning Electron Microscope) at the magnification of x1,000 for group and up to x20,000 for individual photos, the nannoplanktons were shown to accumulate on the phillipsite minerals as a binding matrix. Different directions and velocity of the bottom current when the phillipsite minerals were originated, might have contributed in binding of the various mineral shapes. The calcareous nannoplankton in the studied area is preserved within the sediments between 3880 m to 3914 m depths below sea level (bsl). This interval possibly located between Lysocline and Carbonate Compensation Depth (CCD), is indicated by the presence of well preserved calcite minerals and calcareous nannoplankton within sediments. Discoaster multiradiatus, the dominant fossil within the sediments in the studied area, is Paleocene in age. Therefore, the binding of nannoplakton accumulation as a matrix of the phillipsite minerals occurred as a postgenetic deposition.
Co-Authors Adisaputra, Mimin Karmini arif ali, arif B. Nirwana Eko Saputro, Eko Mimin Karmini Adisaputra Nirwana, B. P. Astjario, P. Subarsyah Subarsyah Subarsyah Subarsyah Subarsyah, Subarsyah Subarsyah, Subarsyah Tommy Naibaho, Tommy Yulinar Firdaus, Yulinar