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All Journal IJOG : Indonesian Journal on Geoscience Jurnal Geologi dan Sumberdaya Mineral (Journal of Geology and Mineral Resources)
Ungkap M. Lumbanbatu
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.  
MORFOGENETIK DAERAH LUBUKSIKAPING PROVINSI SUMATERA BARAT Lumbanbatu, Ungkap M.
Jurnal Geologi dan Sumberdaya Mineral Vol 19, No 2 (2009): Jurnal Sumber Daya Geologi
Publisher : Pusat Survei Geologi

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1986.84 KB)

Abstract

The landscape of Lubuksikaping and the surrounding area is belong to the Barisan Mountain Range. In general, it had been built up by Structural Ridge, Volcanic Cone Remnant, Volcanic Cone, Structural Valley and Alluvial Plain. Those landscapes are devided into landforms based upon their genetic. It is interested to know that the landform in the western part of Structure Valley is more complexes compared to that of the eastern part. The westernpart landform is composed of several land form such as Fault Scarpment, Volcanic Cone, Volcanic Cone Remnant, Denudated hilly structure), Aluvial Fan and Aluvial Plain, while in the eastern part, the landscape mostly consists of Denudational Hill. These mean that the western part of studied area is being more dynamic. Based on those data mentioned above, it can be deduced that the landscape of this region has been influenced by volcanic and regional and or local tectonic activities, as well as by weathering, erosion, and sedimentation processes Keywords: landscape, landform, regional tectonic, local tectonic
Co-Authors Suyatman Hidayat