MODEL DEFORMASI GETAS DI ZONA SESAR KALIGARANG SEMARANG

Fahrudin, Fahrudin and Winarno, (2012) MODEL DEFORMASI GETAS DI ZONA SESAR KALIGARANG SEMARANG. Jurnal Sumber Daya Geologi, 2 (2). pp. 89-100. ISSN 1829-5819

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Abstract

Abstrak Kegiatan tektonik di Kota Semarang menyebabkan terbentuknya sesar. Identifikasi sesar dan struktur penyerta yang tepat akan memberikan pemahaman kinematika dan dinamika dari Zona Sesar Kaligarang. Zona Sesar Kaligarang sudah terbentuk sejak Tersier dengan orientasi sistem tegasan σ1 = 37°, N158°E, σ2 =,45°, N12°E, σ3 = 30°, N244°E, yang mengindikasikan pergeseran mendatar mengiri. Setelah itu pada Plio-Plistosen mengalami reaktifasi dengan pergeseran mendatar menganan yang ditunjukkan oleh orientasi sistem tegasan σ1 = 51°, N185°E, σ2 = 30°, N205°E, σ3 = 8°, N275°E. Selain itu, kelurusan di sekitar Sesar Kaligarang mempunyai arah NEE-SWW sampai NWW-SEE. Struktur ini disebabkan oleh aktivitas Gunung Unggaran. Kata kunci: Sesar Kaligarang, sistem tegasan, reaktifasi, mendatar mengiri, mendatar menganan Abstract Tectonic activities in Semarang have resulted fault formations. A proper identification on faults and subsidiary structures will provide understanding on the kinematic and dynamic of the Kaligarang Fault. The Kaligarang Fault Zone has been formed since the Tertiary time with stress system orientation of σ1 = 37°, N158°E, σ2 =,45°, N12°E, σ3 = 30°, N244°E indicating left lateral displacement. Afterwards during Plio-Plistocene, the Kaligarang Fault Zone was reactivated with right lateral displacement as indicated by stress system orientation of σ1 = 51°, N185°E, σ2 = 30°, N205°E, σ3 = 8°, N275°E. Beside that, the linements at surroundings of the Kaligarang Fault have NEE-SWW until NWW-SEE directions. This structures were caused by the Unggaran activities. Keywords: Kaligarang Fault, stress system, reactivated, right lateral, left lateral

Item Type:Article
Divisions:Faculty of Engineering > Department of Geological Engineering
Faculty of Engineering > Department of Geological Engineering
ID Code:38807
Deposited By:Fahrudin Fahrudin
Deposited On:14 Mar 2013 16:31
Last Modified:14 Mar 2013 16:36

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