INTERPRETASI STRUKTUR KERAK DAN MANTEL ATAS DI BAWAH PROVINSI BENGKULU MENGGUNAKAN TOMOGRAFI SEISMIK WAKTU TUNDA
Bengkulu is one of Province in the southern of Sumatra which is its geological structure influenced by increasing of tectonic activities. It is noted by active earthquake due to fault and volcanoes activities and also subduction zone existance along west coast. Seismic Tomography method is used to d...
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| Main Authors: | , |
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| Format: | Theses and Dissertations NonPeerReviewed |
| Published: |
[Yogyakarta] : Universitas Gadjah Mada
2014
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| Subjects: | |
| Online Access: | https://repository.ugm.ac.id/133787/ http://etd.ugm.ac.id/index.php?mod=penelitian_detail&sub=PenelitianDetail&act=view&typ=html&buku_id=74607 |
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| Summary: | Bengkulu is one of Province in the southern of Sumatra which is its geological
structure influenced by increasing of tectonic activities. It is noted by active
earthquake due to fault and volcanoes activities and also subduction zone
existance along west coast. Seismic Tomography method is used to delineatethe
subsurface stucture. Using LOTOS-12 program and data inputfrom seismic wave.
The interpretation of subsurface based on the P-wave and S- wave velocity
variation is got to resulted negative velocity anomaly from Bukit Barisan
Mountain. The lowest negative anomaly is beneath volcanoes with the deviation
velocity is-5 % (Vp = 7.35 km/s dan Vs = 4.19 km/s) and it is found partial
melting existance in 110-130 km depth. The negative anomaly with low velocity
is estimated as fluids and subduction slub melting. From inversion processing is
got velocity increasing from 25 to 35 km depth which is estimated as transition
zona from crust to upper mantle noted by mohorovisic discontinuitiy. |
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