Bulletin of the Geological Society of Malaysia, Volume 9, Nov. 1977, pp. 159 – 173
Geological Survey Division, Department of Mineral Resources, Bangkok, Thailand
Abstract: The Khuntan batholith lies within the tin-rich granitic belt of S.E. Asia. Petrological investigations reveal that the igneous rocks at Khuntan consist predominantly of granite with subordinate amounts of quartz monzonite, biotite-muscovite granite and tourmaline granite. The manor phase is a coarse-grained porphyritic rock. Whole rock radiometric dating by Rb/Sr method suggests an age of 206 ± 4 m.y. (Upper Triassic-Lower Jurassic).
Known deposits of tin, antimony and manganese indicate a considerable mineral potential for the area. Geochemical data suggest high trace occurrences of Sn, Sb, Pb, Zn, Cu and Mn in the granitoids.