Zircon is a common accessory mineral in various rocks,especially in the crustal ones.It is the best mineral for U-Pb dat......

米仓山地区发现一种自然界较为少见的与超基性岩有关的富镁钙质矽卡岩。矽卡岩产于晋宁中期超基怀岩与中元古代大理岩接触带上，并被......