Geological Environments of the Kledang Range, Perak Triassic Crystalline Rock in Supporting Safety Case Development for Radioactive Waste Disposal

Kinta Valley consists of Kinta river and its tributaries, while the Kinta river itself is a tributary of the great Perak river. To the west of Perak river locates the Kledang Range and to the east is the Malaysia Main Range. The geology of Kinta Valley consists of crystalline rocks, sedimentary rocks, and alluvium. Crystalline rocks in the Kledang Range consist of medium grained muscovite-bearing biotite granite, greenish medium to fine grained felsic, muscovite-bearing leucogranite, highly disrupted and altered granite (PTG) containing large K-feldspar megacrysts, fresh biotite granite (PTG) with weak alignment of K-feldspar phenocrysts and biotite, coarse grained biotite granite (PTG) with 5 cm large K-feldspar megacrysts and foliate biotite granite. The understanding of crystalline host rock behaviour and factors that influence waste isolation performance over a long period of time are important as technical basis for future surveys of the area and siting investigations for radioactive waste repository applications. (author)