Volume : III, Issue : V, May - 2013

Magnetic Method Interpretation to Determine Subsurface Structure Around Kelud Volcano

Bagus Jaya Santosa

Abstract :

Measurements have been performed using magnetic method to determine the structure of the subsurface in the vicinity of Mount kelud. Data collection is conducted at random in an area of 0.6 km x 1 km with the amount of points gained 244 points of measurement. Acquisition process is performed using the Proton Magnetometer ENVI SCINTREX. Data processing begins with a correction IGRF and daily variation correction to get the total magnetic field anomalies. Then the reduction of flat areas, the upward continuation at a height of 100 feet to 400 feet above the sferoida reference and the result is used for the separation of local and regional anomaly. A qualitative interpretation of the results shows that there is a magnetic dipole anomalies in the East which stretches from the Northwest to the southeast of–2125 nT until 1863 nT. Talwani method of 2–D is used for quantitative interpretation. The resulting geological model is fracturing fault plane. The value of magnetic suseptibilitas under the dome of the volcano mount Kelud to Lirang (k = 0,0124 emu/g) is dominated by basalt rocks and mount Sumbing (k = 0,0234 emu/g – 0,0239 emu/g) which is dominated by andesite.

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Article: Download PDF   DOI : 10.36106/ijar  

Cite This Article:

Bagus Jaya Santosa Magnetic Method Interpretation to Determine Subsurface Structure Around Kelud Volcano Indian Journal of Applied Research, Vol.III, Issue.V May 2013

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