THE 1ST DISCOVERY OF A TIN DEPOSIT RELATED TO HERCYNIAN A-TYPE GRANITES IN CHINA

This paper introduces the petrological, mineralogical and geochemical features of the rocks hosting the Sareshik tin deposit-an independent tin deposit related to Hercynian A-type granites discovered in China i n 1987. A comparison with the features of A-type granites at home and abroad indicates that some of their petrological features are more typ ical than those of famous A-type granites of Nigeria. The geological f eatures of the tin deposit are salient and notably different from thos e of some famous tin deposits in China, so the deposit may represent C hina's deposits associated with anorogenic granites. This tin deposit was formed in the Hercynian Stage. This type of tin deposit was for th e first time discovered in China and is also rare in the world. It is a new type of tin deposit in China.