Electronmicroscopic examination shows that Ti-oxide (rutile or anatase) is replaced by brannerite, indicat-ing the metasomatic origin of brannerite.

在电镜下观察到铀矿与化（金红石或锐矿）成交代关系，说明铀矿是交代成因。

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.

在西南区晚二叠世煤中首次发现了热液成因硫锰矿和硫砷锑矿、碱性成因胶态锐矿和陆源碎屑成因斜绿泥石。

There is siderite, iron dolomite , calcite, Barite, pyrite, anatase, rutile, piece quartz, the mica ( or hydromica ), diaspore,etc. in the impurity in the mineral .

杂质矿物见有菱铁矿，铁白云石，方解石，重晶石、黄铁矿，锐矿，金红石，碎屑石英，云母（或水云母），水铝石等。