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EVOLUSI GEOMORFIK MATAROMBEO: DARI CEKUNGAN MESOZOIKUM MENJADI PEGUNUNGAN HOLOSEN Saptono Budi samodro
KURVATEK Vol 1 No 1 (2016): April 2016
Publisher : Institut Teknologi Nasional Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33579/krvtk.v1i1.215

Abstract

Pegunungan Matarombeo merupakan salah satu pegunungan di lengan Tenggara Pulau Sulawesi, dibatasi oleh Sesar Matano di bagian utara dan Sesar Lawanopo di bagian Baratdaya – Selatan  yang menghasilkan struktur geologi yang sangat kompleks. Penelitian ini bertujuan  melakukan kajian geologi, berupa pengamatan morfologi, stratigrafi dan struktur geologi untuk mengetahui evolusi geomorfik yang bekerja di Pegunungan Matarombeo. Metode yang dilakukan adalah  interpretasi terhadap citra ifsar, pengamatan geologi lapangan, dilanjutkan dengan pengamatan petrografi, paleontologi, dan analisis struktur geologi. Berdasarkan kajian stratigrafi, terutama lingkungan pengendapan batuan serta digabungkan dengan hasil analisis struktur geologi dan evolusi tektonik yang terjadi, diperkirakan evolusi geomorfik di daerah Matarombeo diawali pada masa Mesozoik berupa cekungan dasar laut hingga sekarang menjadi pegunungan.
GEORADAR INVESTIGATION AT THE KEDULAN TEMPLE EXCAVATION SITE, KALASAN, YOGYAKARTA Salahuddin Husein; Saptono Budi Samodra; Subagyo Pramumijoyo; Wahyu Astuti
Journal of Applied Geology Vol 2, No 1 (2010)
Publisher : Geological Engineering Department Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (2649.483 KB) | DOI: 10.22146/jag.7234

Abstract

Kedulan Site is the buried and ruined 9th century Mataram Hindu Kingdom temple, located in Tirtomartani Village, Kalasan District, Sleman Regency, Yogyakarta Special Province. This temple was incidentally discovered by sand diggers on 24 November 1993 under several meter thick of fluvio-volcanic deposit of the modern Merapi. Several technical studies were needed to carefully excavate the temple, including geology and geophysical approaches. One of the geophysical method have been applied was ground penetration radar (georadar). This method uses radar technology to obtain a continuous profile of the shallow sub-surface and thus allows scientists to image soil substratums based on differing dielectric constants. Georadar investigation by Department of Geological Engineering, Faculty of Engineering, Universitas Gadjah Mada, was conducted on 4 December 2007. The main purpose was to identify the location of the outer stone fence as an estimation to define the temple site area to be excavated. About one line was chosen to cross the site in north-south direction in a distance of 328 m. Two runs were completed on the same line but different courses, i.e. forward and backward, where one was checked with another. The result indicates the presence of the outer stone fence was possibly buried in a depth of 7 m. It was located about 40 m distance outside the inner stone fence. Assuming the fences were quadrangle relative to the main temple, hence it is estimated that the site area to be excavated is about 13.830 m² and total 96.808 m³ gravels and sands to be removed.