Abstract
The gelogical structure of Thailand and Malaysia is a member of folded moutains around the Asian schild. The younger granite which intruded at the Cretaceous period is the ore bringer of metallic ore deposits in both country. Main ore minerals are cassiteritte, iron minerals, stibnite, wolframite, manganese minerals, fluorite, gypsum, lignite and rock-salt. Minor elements contained in cassiterite (SnO2) are Fe, Si, Mn, Mg, Pb, W, In, Bi, Al, Mo, Cu, Ti, Ca, Cr and Nb. Fluorite (CaF2) collected from BAN HONG district contains such minor elements as Fe, Si, Mn, Mg, Al, Cu, Ba, Sr and Sn.
