Title: Structures and Basin Setting Of Semanggol Formation, Bukit Merah Using Gravity Data
Abstract: Geophysical investigations have been widely used in studying geology and subsurface structures. A study on the application of gravity survey covering the Semanggol area has been acquired and analysed. The aim of this survey is to study the basin setting and subsurface structures such as fractures and faults. The survey is conducted by using the Scintrex model CG-5 gravimeter. There are total of 171 gravity stations established during the survey with a 500 m to 1 km spacing. In order to generate a corrected gravity data, the raw data were corrected for drift, latitude, free-air, terrain and Bouguer corrections. The corrected data were processed and analysed to produce Bouguer, regional and residual gravity anomaly maps for qualitative and quantitative interpretations. Techniques of regional-residual separation was applied to study the deep-seated and shallow-seated geologic features. The Bouguer and regional gravity values decreased towards the eastern part in the map, indicating the thickening of basement depth. The rose diagram for residual gravity and DEM maps reveal that the dominant orientation for gravity lineaments is in NE-SW direction. Also, the 2-D modelling was established by the A-A’ profile from Bouguer gravity map to study the basin setting.