Scheelite is an important ore mineral, and is well known among collectors for its distinctly colored crystals associated with brilliant fluorescence. It forms a series with the rarer mineral Powellite, which contains molybdenum in place of the tungsten. Scheelite is named after the Swedish chemist Karl Wilhelm Scheele .
Virtually all tin in Myanmar39;s Slate belt occurs as cassiterite and almost all tungsten as wolframite. Scheelite is present in little more than trace amounts. Tin and tungsten are invariably associated with granites. Production is from primary deposits, which may be either hard rock or weathered , and from alluvial or placer deposits.
A comparison of the general characteristics of Nb Ta bearing minerals in Thailand and Malaysia are as follows: Nb Ta bearing minerals are closely associated with tin bearing pegmatites along the Western Tin Belt of the Burma Thai Malaya orogen.
The complex nature of occurrence of both tungsten and tin minerals necessitated an integrated process comprising physical beneficiation and chemical extraction. The process route that was developed gave a tungsten and tin recovery of about 80 and 90%, respectively, on treating a primary gravity preconcentrate analyzing 16.5% WO 3 and 25.7% Sn.
As measured by reserves, Myanmar hosts at least three mineral deposits of global significance: the Bawdwin lead zinc silver deposits; the Monywa copper deposits; and the Mawchi tin and tungsten mine.29 In 2014, Myanmar produced 10% of the world39;s mined tin supply , emerging as the
Scheelite is a calcium tungstate mineral and an important ore of tungsten found in W skarn deposits The collection of ore minerals found in a skarn deposit depends mainly on the chemistry of the granite and are a mixture of sulphide and oxide minerals. Fe skarns contain mostly the Fe oxide mineral, magnetite.