alabandite

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首次发现了热液成因的硫锰矿和硫砷锑矿、碱灰成因的胶锐钛矿和陆成因的斜绿泥石。