Morphological Lineament Analysis: Implication to Tectonics of Sarawak

Digital Elevation Model (DEM) data are produced from Geographic Information Systems (GIS) and express topography based on elevation sets. It is a remarkable tool to observe and analyse tectonic and structural lineaments especially in areas of limited or no access. Limited work has been done in the field of morpho-tectonics and morpho-structural analysis in the area which limits the understanding of the tectonic evolution of Sarawak. The primary objective of this work was to observe and understand the lineament trend of the area and its relation to tectonic implications. Due to inaccessibility of many onshore parts of Central Sarawak, the location of study was divided into several zones and high resolution Digital Elevation Models were used to carry out structural lineament analysis in this study. Processing of DEM data sets help to control factors pertaining to sun azimuth and sun angles in order to create shaded relief images by illumination method. Manipulation of these attributes aid in obtaining images with different enhanced
features and to observe the continuity of lineaments. From the resulting images,lineaments will be mapped and interpreted based on tectonic evolution that occurred
in the area either locally or regionally. By understanding geomorphology and tectonic history of a region, it could help in the exploration of new prospect.