Geology and sequences of metamorphic rocks mineral assemblages identification in Gerik Ecological Corridor, Gerik, Perak.

The Gerik Ecological Corridor is part of the Baling Formation and is positioned between Jeli, Kelantan, and Ulu Perak, Perak. The study area is approximately 25km2 which is aligned along latitude 05° 33’ 48” N to 05° 35’ 33” N and longitude 101° 24’ 15” E to 101° 28’ 33” E. This research aims to update the geological map of the Gerik Ecological Corridor area with a scale of 1:25000. The method that has been used at the beginning of this research is a preliminary study of the previous research and a literature review that has been conducted surrounding the study area. The geological mapping and collecting of rock samples in the research area are done during fieldwork mapping. The lithologies found in the study area are schist and gneiss which in metamorphic rock types. Based on the petrographic analysis, schist contains more mica groups such as muscovite, while gneiss is dominated by quartz and biotite. The transition of metamorphic rock sequences in the study area towards the east is from low-grade to high-grade metamorphic rocks. For the geomorphological aspect, the landform that has on the study area can be classified into two types which are high relief morphology and medium relief morphology. Besides, the transition of metamorphic rocks mineral assemblages of the study area was correlated by this research. The hand specimen collected from the study area then has been processed by the Scanning Electron Microscope (SEM) analysis and X-Ray Diffraction (XRD) analysis. The analysis shows that the mica schist sample and gneiss sample has a high amount of sillimanite mineral rather than kyanite mineral and staurolite mineral. So, the rock mineral assemblages of the study area can be determined in the sillimanite zone of regional metamorphic rocks.