JURNAL METEOROLOGI DAN GEOFISIKA
Vol 16, No 2 (2015)

PEMODELAN DUA DIMENSI DATA GRAVITASI DI WILAYAH RIAU DENGAN METODE TALWANI (STUDI KASUS LOKASI - X)

Supriyanto Rohadi (Badan Meteorologi Klimatologi dan Geofisika (BMKG))
Rudi Darsono (Badan Meteorologi Klimatologi dan Geofisika (BMKG))



Article Info

Publish Date
15 Aug 2015

Abstract

Observasi nilai percepatan gravitasi dilakukan di Riau (Lokasi - X). Data pengamatan yang didapat diolah sedemikian rupa sehingga didapatkan nilai anomali gravitasi. Secara umum anomali gravitasi terdiri dari anomali bouger, anomali regional, dan anomali residu. Anomali Bouguer dan anomali Residu di wilayah pengamatan menunjukkan area anomali gravitasi tinggi di bagian selatan, sedangkan anomali gravitasi rendah di bagian utara. Selanjutnya peta anomali tersebut dibuat permodelan dua dimensi berbasis Metode Talwani. Dari hasil pemodelan menggunakan model poligon metode Talwani didindikasikan adanya patahan naik dengan penurunan massa pada bagian tengahnya (graben). Model patahan ini merupakan sistem pembentuk sedimen pada wilayah penelitian.  Observation of the gravity is conducted in Riau (Location - X). Observational data is processed in such a way to obtain the value of the gravity anomaly. In general, the gravity anomaly is composed of Bouguer anomaly, regional anomaly, and residual anomaly. High Bouguer anomaly and Residual anomaly observed in the region of the south area, while the low gravity anomaly in the north area. Furthermore, the anomaly map generates by using two-dimensional modeling based on the Talwani method. From two-dimensional modeling (2-D)indicate that fault model due to the loss of mass in the middle (graben). This fault model is a system forming sediment in the study area.

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Journal Info

Abbrev

jmg

Publisher

Subject

Earth & Planetary Sciences Energy Physics

Description

Jurnal Meteorologi dan Geofisika (JMG) is a scientific research journal published by the Research and Development Center of the Meteorology, Climatology and Geophysics Agency (BMKG) as a means to publish research and development achievements in Meteorology, Climatology, Air Quality and ...