Application of Airborne Geophysics to the Interpretation of Geologic Setting in Nan-Uttaradit Area, Northern Thailand
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Abstract
This investigation is aimed to process airborne magnetic and radiometric data by various techniques. We applied RTP, vertical derivative for airborne magnetic data and Cooking Technique for airborne radiometric data. Three magnetic domains have been identified, namely northern, central and southern domain. The central domain is a significant highly anomalous NESW trending narrow zone, possesses high magnetic and low radiometric intensities. This central high is enveloped by very low magnetic and high radiometric intensities. Both of the north and south domains, which roughly orient in the N-S trend, exhibit low magnetic and various radiometric intensities with the sporadic high magnetic patterns. The high magnetic anomalies in this area has been recognized in 2 patterns, elongate pattern located in central high and circular pattern located in the northernmost area. The polarity of magnetic bodies was identified by magnetic modeling program and shows the well-defined east-dipping direction. It can be summarized that the Nan suture shows eastward-dipping anomaly indicating the eastward polarity of the plate, by the collision tectonic setting. Therefore, it is ascertained that the Nan suture zone can be well delineated from this study.
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Copyright © 2008 Department of Geology, Faculty of Science, Chulalongkorn University. Parts of an article can be photocopied or reproduced without prior written permission from the author(s), but due acknowledgments should be stated or cited accordingly.
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