1.Electronmicroscopic examination shows that Ti-oxide (rutile or anatase) is replaced by brannerite, indicat-ing the metasomatic origin of brannerite.
在电镜下观察到钛铀矿与钛氧化(金红石或锐钛矿)成交代关系,说明钛铀矿是交代成。
2.The alabandite and getchellite of hydrothermal origin, cement anatase of alkaline volcanic origin, and the high content of chlorite in coal were fist found in coals.
在西南地区晚二叠世煤中现了液成锰矿和砷锑矿、碱性火山灰成胶态锐钛矿和陆源碎屑成斜绿泥石。
3.There is siderite, iron dolomite , calcite, Barite, pyrite, anatase, rutile, piece quartz, the mica ( or hydromica ), diaspore,etc. in the impurity in the mineral .