The poly metallic deposit occurred in the Erlangping ophiolite of eastern Qinling Mountain was regarded as volcanogenic type.
二郎坪群蛇绿巖中多金属矿床属火山成因块状硫化物矿床。
With three types of volcanogenic clay rocks as examples, the natural gamma logging data are proved to be essential for finding and studying clay strata formed by volcanic events.
例举三种产状的火山成因粘土巖论证用自然伽玛测井资料寻找和研究火山事件粘土巖层的必要和优越性。
They mainly belong to effusive facies, explosive facies and volcanogenic sedimentary facies.