STRUKTUR GEOLOGI BAWAH PERMUKAAN DAERAH PEKALONGAN DAN SEKITARNYA BERDASARKAN ANALISIS ANOMALI GAYA BERAT DAN MAGNET

D A Nainggolan (Pusat Survei Geologi)

Jurnal Geologi dan Sumberdaya Mineral (Journal of Geology and Mineral Resources)
Vol. 19 No. 2 (2009): Jurnal Sumber Daya Geologi

The result of gravity measurement in the studied area, which is mainly covered by volcanic rocks, has an anomaly value ranging from -11 to 45 mgal. Quantitative interpretation of Bouguer anomaly and magnet shows a subsurface profile depicting the geological processes and tectonic activities. The qualitative analysis results of residual and Bouguer anomalies indicate faults mainly have east - west and north - south directions. Meanwhile, the quantitative analyses of three subsurface model profiles show the graben structure in the Subah area to the south east of Batang city.  Keywords : gravity, magnet, faults, graben, structural geology, Pekalongan area