摘要
Laoyaquan alkaline granite is located in eastern Junggar area, northern Xinjiang. Identification of the rock and minerals in Laoyaquan alkaline granite body and the Kamusite tin deposit and Ganliangzi tin deposit, and the REE geochemical and fluid inclusions studies indicate that all of the granite porphyry, ore-bearing quartzite, greisen body-type tin ore body, and quartz vein-type ore body were the products derived from the same alkali-rich granitic magma. Under the conditions of reduction-oxidation state and acidity-alkalinity, the tin-complex taken by the fluid was decompounded because of its unstabilizing, which leads the tin element to be deposited and form the ore.