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液成因的硫和硫砷锑、火山灰成因的胶态锐钛和陆源碎屑成因的斜绿泥石。