新疆干梁子锡矿田成岩成矿作用同位素年代学研究及矿床成因探讨

干梁子锡矿田位于准噶尔盆地东北缘，构造上处于西伯利亚和哈萨克斯坦－准噶尔板块的交汇部位，是贝勒库都克锡矿带的重要组成部分。地质地球化学和同位素年代学研究表明，干梁子锡矿田的形成与碰撞造山期花岗岩体的侵位有关，属岩浆热液型锡矿，成矿时代为中石炭世。

Chronology and Oricin of the Canlianczitin Orefield, Xinjiang

Located geographically in the northeastern border of Junggar Basin, Uygur Autonomous Region of Xinjiang,and geologically in the juncture of Siberia and Kazakhstan Junggar palaeoplate,the Gznliangzi tin orefield constitutes an important part of the Beileikudouke tin metallogenic zone in East Junggar area.Five kinds of orebodies in the orefield have been found,namely cassiterite quartz vein type,greisen type,tin bearing granaite type,alluvial tin type and pegmatitic vein type.The natural forms of the orebodies vary with the host structures,mineralization positions and metallogenic physicochemical conditions,and comprise simple veins,irregularly shaped veins,beaded veins,lens shaped veins and lenticular veins.According to occurrence types of ores,mineraization process,paragenetic association and formation order of ore minerals,mineralization of the Ganliangzi tin deposit underwent a very complex process and can be divided into three metallogenic stages,viz.,mineralization during late stage of magmatic differentiation and metasomatic alteraton,postmagmatic mineralization and superagene leaching mineralization.Geological,geochemical and geochronological studies show that the formation of the Ganliangzi tin orefield was related to the granitic bodies of the Carboniferous collision orogenic cycle.Metallogenic materials came from the lower crust and the metallogenic hydrothermal solution was a typical magmatic one.