Located in the middle segment of the Three River region, the Yunlong metallogenic belt is considered to be connected with the Southeast Asian giant tin belt. The authors performed LA-ICP-MS zircon U-Pb analysis of two-mica granite closely related to tin mineralization, and got a Late Cretaceous emplacement age of (72.2±0.8) Ma (MSWD=1.9). The genesis of tin deposits in the Yunlong tin metallogenic belt can hardly be explained by one single model(granite-related magmatic-hydrothermal or magmatite-hydrothermal model).Granitic magmatism and tectonic-related magmatism had both contributed to the formation of tin deposits, but they played different roles in different metallogenic periods.
© 2004-2018 中国地质图书馆版权所有 京ICP备05064691号 京公网安备11010802017129号 地址:北京市海淀区学院路29号 邮编:100083 电话:办公室:(+86 10)66554848;文献借阅、咨询服务、科技查新:66554700 |