南京大学学报(自然科学版) ›› 2019, Vol. 55 ›› Issue (6): 888897.doi: 10.13232/j.cnki.jnju.2019.06.002
张弘1,2,申俊峰1(),董国臣1,刘圣强1,王冬丽1,王伟清1
Hong Zhang1,2,Junfeng Shen1(),Guochen Dong1,Shengqiang Liu1,Dongli Wang1,Weiqing Wang1
摘要:
来利山锡矿位于三江成矿构造带南端,是滇西地区著名的锡多金属矿床之一.应用成因矿物学与找矿矿物学的理论和方法,对该矿主要矿石矿物锡石进行了标型特征研究.结果表明:自成矿早期至成矿晚期,锡石的结晶习性由锥面发育向柱面发育演化,锡石热电导型由P?N型向N?P型逐渐过渡.锡石阴极发光条件下显示出的环带构造可能与U,Th等元素含量有关.其中,淘金处矿段锡石与老熊窝矿段、三个硐矿段锡石的晶形、大小、长宽比等有明显不同,淘金处矿段锡石环带最为发育,且热电性以P?N型为主.综合认为淘金处矿段成矿温度高于老熊窝和三个硐矿段,抑或淘金处矿段即是该矿区成矿热液活动中心.因此淘金处最具找矿潜力.这个研究成果为探讨成矿物质和热液来源及进一步找矿勘查提供了科学依据.
中图分类号:
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