The development features of reservoir space are different in different lithofacies belts. In a word, around volcanic vent is favorable reservoir development position.

不同岩相带储集空间的发育特征不同，火山通道周围是有利储集层发育区。

The scientists determined that the depression was a volcanic vent, and the bright ring around it was pyroclastic, remnants of lava that had been spewed outward, much like a volcanic fountain on Earth.

科学家确定凹陷处是一个火山口，并且在它附近明亮的圆环是火山碎屑岩，是火山喷发出岩浆的残余，很象地球上的火山喷口。

They have both the flooding and the intrusive lithofacies but also have the volcanic and the volcano vent lithofacies and the lithology is mainly the middle acidic intrusive rocks.

既有溢流相，又有侵入岩相，还有次火山岩相和火山通道相；岩性主要以中酸性侵入岩为主。