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因的硫和硫、碱性火山灰因的胶态锐钛和陆源碎屑因的斜绿泥石。