General geology and influences of regional structural pattern with slope failure at Kampung Sungai Asap, Gua Musang, Kelantan

Slope failure is mainly control by geological structure such as joint, bedding, foliation and others. Slope failure is defined as the mass movement includes all the processes that involved the outward or downward movement of slope forming material under the influences of gravity. The study area is located within the latitude of 4°57’60” to 4°55’0’’ and longitude 102°1’30” to 102°4’0’’ in Gua Musang, Kelantan. The objectives of this research are to an updated geological map of Kampung Sungai Asap in scale 1:25 000, to analyses the regional structural pattern using satellite imagery, and to investigate the relationship between regional structural pattern with slope failure distribution. The lithologies found in the study area are volcanic tuff, limestone, mudstone, metasiltstone and sandstone. Slope failure mapping was done and the total slope failures are 11 and all of them are translational type of failures. Two slope failures were choose to investigate the influences of structural pattern with slope failure. From the stereonet analysis of slope failure, the present of discontinuities on slope has influences the failure because there are discontinuities sets plotted on critical area for sliding and they are daylighting into the slope. As a result, structural pattern mainly controlled the slope failures.