摘要
冰洲石系透明如水的方解石,CaCO_3含量达99.95％,县高折射率,用于制作各种偏光仪器,是现代高科技工业的重要矿物原料。我省碳酸盐岩分布地区赋存岩溶型、脉型、裂隙破碎带型冰洲石矿床。在古岩溶与节理裂隙相结合地段及方解石脉膨胀部位于成矿有利,光学材料晶体获得率较高。冰洲石的精选是以台灯聚光,在暗室里重点鉴定节瘤、管道、包体、剔出缺陷部分,获取商品晶体。四川地区现已发现有待勘查开发的冰洲石矿点30余处,建议加强地质勘查工作,对冰洲石资源进行保护性开采。
Iceland spar is a transparent calcite which contains 99. 95% CaCO3and has a high index of re-fraction. It is used for making various polarizing films and is an important mineral raw material for high technical industry.
More than 30 iceland spar ore spots have been found in Sichuan. They are confined to carbon-ate rock and may be divided into karst type, vein type and fissure -fracture zone type. Location where paleokarst joins fissures, and zone of dilation of calcite vein favor the ore -formation and have higher recovery ration of crystals for optical material.
Commercial iceland spar crystals are obtained by means of rejecting such defects as inclusion, knot and conduit from iceland spar raw material
Geological exploration for the iceland spar ores should be strengthened, and iceland spar resources should be protectingly exploited.
出处
《四川地质学报》
1993年第2期144-149,共6页
Acta Geologica Sichuan
关键词
冰洲石
光学材料
商品矿
四川
iceland spar,optical material,commercial ore,Sichuan
