PERMODELAN SUSEPTIBILITAS BATUAN BAWAH PERMUKAAN DASAR LAUT PERAIRAN BANGGAI-SULA UNTUK MENENTUKAN STRUKTUR SESAR BERDASARKAN RESPON ANOMALI MEDAN MAGNET TERHADAP KORELASI DATA SEISMIK

• Main Authors: , AGRYANZIS CHEPTIAN G, , Drs. Imam Suyanto., M.Si.
• Format: Theses and Dissertations NonPeerReviewed
• Published: [Yogyakarta] : Universitas Gadjah Mada 2014
• Subjects: ETD
• Online Access: https://repository.ugm.ac.id/129113/; http://etd.ugm.ac.id/index.php?mod=penelitian_detail&sub=PenelitianDetail&act=view&typ=html&buku_id=69491
• Institution: Universitas Gadjah Mada

Marine magnetic measurement for Banggai-Sula have done in 2010 with an area of 200 km x 300 km. This acquisition was conducted by survey vessel on a predetermined design survey to know magnetic field value of research area. Total magnetic field data were corrected for IGRF and diurnal variation correction to obtain total magnetic field anomalies. Reduce to magnetic pole result compared with the result of reduce to magnetic equator from total magnetic field data, then local-regional anomaly separated by using polynomial fitting method. Polynomial order it�s used is 3. The trend of the third polynomial order match against magnetic data trend. Result of local anomalies of each line created a model using Geosoft Oasis Montaj 6.4.2 software. The resulted model shows the susceptibility value of metamorphic rocks 0,007 cgs, sandstone 0,0007 cgs, marl-limestone 0,001 cgs, limestone 0,0003 cgs, sandstone 0,0001 cgs, and granite intrusions 0,015 cgs which is dominated by the presence of east-west fault structures with a force direction from the south.