Experimental Study on the Mechanism for the Formation of Sn‐bearing Granite in Northern Guangxi1

Abstract

Abstract Experimental results have proved that the Xuefengian Sn‐bearing biotite granites were formed by remelting and recrystallization of the Proterozoic metamorphic rocks of the Sibao Group at 500 × 105 —2000× 105 Pa and 750‐570 °C and further testified that the F‐ and B‐bearing aqueous solution played an important part in decreasing the formation temperature of the rocks. The results tally with the reality of the field geology. The authors have thus brought to light the mechanism for the formation of the Sn‐bearing biotite granites and expounded the significance of their formation in the crust dynamics of South China.