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All Journal IJOG : Indonesian Journal on Geoscience Jurnal Geologi dan Sumberdaya Mineral (Journal of Geology and Mineral Resources)
Suyatman Hidayat
Pusat Survei Geologi, Jln. Diponegoro No. 57, Bandung
Earth & Planetary Sciences Education Energy Engineering Environmental Science

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Evaluasi awal kerentanan pelulukan/likuefaksi daerah Kendal dan sekitarnya, Jawa Tengah Lumbanbatu, Ungkap M.; Hidayat, Suyatman
Indonesian Journal on Geoscience Vol 2, No 3 (2007)
Publisher : Geological Agency

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1574.21 KB) | DOI: 10.17014/ijog.v2i3.36

Abstract

http://dx.doi.org/10.17014/ijog.vol2no3.20074The investigated area is a region prone to liquefaction hazards since it consists of loose, saturated Quaternary deposits. The Quaternary deposits were deposited in several sediment environments such as swamp, estuary, near shore, off shore, and fluvial (flood plain, flood basin and paleo channel). Among those Quaternary deposits, the paleo channel and estuary deposits which mainly consist of fine - to medium - sand have high susceptibility to liquefaction. An earthquake-source zone which is able to trigger earthquake and to cause liquefaction hazards is known to be thrust fault and subduction zones. Earthquakes produced by thrust fault activities are classified as shallow earthquakes while earthquakes produced by a subduction zone are deep earthquakes. The investigated area is divided into low liquefaction susceptibility, moderate susceptibility and high liquefaction susceptibility zones. This division has been made based on physical characteristic of the sand deposits, grain size, thickness of sand and its position to groundwater level as well as the physical character of overburden layer.  
PERUBAHAN LINGKUNGAN DAN KARAKTER SISTEM PENGENDAPAN PLISTOSEN AKHIR HOLOSEN DI DATARAN PANTAI PEKALONGAN, JAWA TENGAH Moechtar, Herman; mulyana, Herman; Hidayat, Suyatman
Jurnal Geologi dan Sumberdaya Mineral Vol 19, No 6 (2009): Jurnal Sumber Daya Geologi
Publisher : Pusat Survei Geologi

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Abstract

The study of the environmental changes and character of the depositonal systems during Late Plistocene to Holocene on the Pekalongan coastalplain was based on analyses of the sedimentology and stratigraphy of fourteen boreholes. The penentration of the bore head varied from 7.70 to 15.80 m. Six depositional environments which occurred above the Damar Formation (QTd) are: linier clastic deposits (offshore, nearshore, and beach), fluvial deposits (river channel and floodplain), and swamp deposits. These deposits are separated by three depositional intervals (IP I-III). Based on the correlation of lateral and vertical stratigraphic successions, the environmental changes and character of the depostional systems are controled by sea level changes during the Late Pleistocene which were related by glacial and inter-glacial periods. Probably, after deposition of IP I, a local tectonichsve controled deplifting of the are. Keywords: Sedimentology, Stratigraphy, late Pleistocene - Holocene
ANALISIS BENTANG ALAM KUARTER DAERAH CIREBON BERDASARKAN GENESANYA Hidayat, Suyatman; Lumbanatu, Ungkap M
Jurnal Geologi dan Sumberdaya Mineral Vol 20, No 6 (2010): Jurnal Sumber Daya Geologi
Publisher : Pusat Survei Geologi

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Abstract

The research is to study geomorphology of Cirebon area to understand its genetic process. A remote sensing analysis and field observations resulted in seven landform units. These are, Marine Origin, Fluvio-Marine, Fluvial, Volcanic, Fluvio-volcanic, Denudated, and Structural Origin. It reveals that development of landscape features of the investegated area was strongly affected by marine and fluvial processes.Keywords: landscape, landform, marine, river
GEOLOGI KUARTER DATARAN PANTAI JEPARA, JAWA TENGAH Lumbanbatu, Ungkap M; Hidayat, Suyatman; Sukapti, Woro Sri; Patriani, Emma Yan
Jurnal Geologi dan Sumberdaya Mineral Vol 15, No 1 (2014): Jurnal Geologi dan Sumberdaya Mineral
Publisher : Pusat Survei Geologi

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Abstract

Untuk mengetahui dinamika Kuarter di daerah penelitian, urut-urutan lingkungan pengendapan baik secara vertikal dan mendatar perlu dilakukan. Selain itu, untuk menafsirkan proses pengisian cekungan sedimen, korelasi beberapa penampang stratigrafi sangat diperlukan. Pengumpulan data geologi bawah permukaan dilakukan dengan pemboran dangkal menggunakan bor tangan. Sejumlah 52 pemboran telah dilakukan dengan kedalaman maksimum 11,50 m dan total kedalalaman 268,61m. Berdasarkan data tersebut diketahui bahwa satuan batuan di daerah ini dapat dipisahkan Tanah penutup (S), endapan dataran banjir (FP), endapan cekungan banjir (FB), endapan alur Sungai Purba), endapan pasir dataran pantai (B), endapan pasir pematang pantai (BS), endapan rawa bakau (SW), endapan paya (LG), koral / reef (Q), endapan laut dangkal (SM), endapan volkanik / (V), endapan pre-Holosen (pHs). Secara vertikal kombinasi urut-urutan lingkungan pengendapan tersebut menghasilkan 16 tipe penampang. Hasilnya beberapa fenomena geologi dapat diamati seperti adanya perulangan lingkungan endapan rawa, satu indikasi daerah yang mengalami penurunan secara perlahan lahan. Kehadiran endapan volkanik muda berupa tuf dapat ditafsirkan sebagai hasil aktivitas Gunung api Muria paling Muda. Indikasi proses-proses progradasi atau retrogradasi garis pantai ditunjukkan oleh proporsi mangrove yang perlahan-lahan semakin berkurang sementara polen-polen grassland semakin meningkat. Dari kedalaman 150 cm, kecenderungan perubahan itu berbalik yaitu proporsi polen-polen mangrove semakin bertambah sementara polen-polen grassland semakin berkurang. Secara umum kondisi cekungan sedimen pada saat proses pengendapan adalah dalam kondisi tenang (stabil). Dengan demikian abrasi tidak berhubungan dengan kegiatan tektonika.Kata kunci : Dinamika kuarter, retrogradasi, progradasi, kondisi tenang
SEDIMENTOLOGI DAN STRATIGRAFI ALUVIUM BAWAH PERMUKAAN DI PESISIR CIREBON DAN SEKITARNYA Hidayat, Suyatman; Mulyana, Herman; Moechtar, Herman; Subiyanto, Subiyanto
Jurnal Geologi dan Sumberdaya Mineral Vol 19, No 4 (2009): Jurnal Sumber Daya Geologi
Publisher : Pusat Survei Geologi

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Abstract

This study was based on sedimentological analyses of seven boreholes located along the NW to SE traverse, approximately parallel to coastal line of Cirebon. The penetration of the bore head varies from 8 to 13 m. Holocene subsurface of alluvial deposits can be divided into seven environment systems, consisting of Gintung Formation and deposits of offshore, nearshore, beach sand, swamp, channel river, and floodplain. Based on stratigraphic aspects, the succession of that sediments can be divided into three sedimentary intervals (IP I-III). Each interval is typically for environment changes which is controlled by changes of sea level, such as high sea level (IP I), sea level falling (IP II), and low sea level (IP III). The Quaternary dynamics related to environment changes and changes of basin fill were influenced by universal of climatic circulation, regional tectonic, and local of sea level changes. Keywords: Aluvium deposits, sea level, tectonic, climate
KARAKTER WILAYAH GENANGAN LAKUSTRIN HOLOSEN BERDASARKAN ASPEK SEDIMENTOLOGI DAN STRATIGRAFI ENDAPAN RAWA DAN UNDAK SUNGAI (Studi Kasus Geologi Kuarter Daerah Air Molek dan Sekitarnya, Kab. Singingi dan Kab. Indragiri Hulu, Provinsi Riau) Hidayat, Suyatman; Basri, C; Subiyanto, Subiyanto; Mulyana, Herman; Moechtar, Herman
Jurnal Geologi dan Sumberdaya Mineral Vol 19, No 5 (2009): Jurnal Sumber Daya Geologi
Publisher : Pusat Survei Geologi

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Abstract

This study was based on analyses of sedimentology and stratigraphy of nine sediment samples obtained from shallow boreholes. The boring was done of A - B traverse, southwest – northeast direction around Indragiri river, south of Rengat. The study was focus on river channel and lauctrin deposits under the swamp sediments and river terraces as the resent of penetration of the bore head varies from 3.80 to 9.95 m . Based on the correlation of lateral and vertical variation, the stratigraphic succession can be grouped into two depositional interval i.e. depositional interval I & II. (IP.I & IP II). Vertical changes on the lithologic composition can be related to changes on humidity conditions. It is shown from the changes in the character of the facies between lower and upper lacustrine. Changes in basin centre between lower and upper lacustrine environment, as the result of basement movement caused by tectonic activity, impected to up and down movement of the basin floor. Keywords : Quaternary sediments, lacustrine, climate, tectonic
Co-Authors Anak Agung Istri Sri Wiadnyani C Basri, C Emma Yan Patriani, Emma Yan Herman Moechtar Herman Mulyana Ungkap M Lumbanatu, Ungkap M Ungkap M Lumbanbatu, Ungkap M Ungkap M. Lumbanbatu Woro Sri Sukapti, Woro Sri