钻遇二叠系火山岩的厚度为285 ～ 1 133 m，识别出大型火山机构7 个，多数火山口呈圆形或近圆形，火山机构在剖面上呈蘑菇状、伞状和漏斗状特征，火山通道呈管状。这些证据表明，该区火山喷发模式以中心式喷发为主，如此密集分布的火山机构群说明本区是塔里木大火成岩省的喷发中心之一。

of point-line-plane-body analysis of drilling，seismic profiles and time slices． The thickness of the Permian volcanic rocks ranges from 285 m to 1 133 m at the well points，and 7 large craters are identified． Most of the craters were circular or nearly circular，while the volcanic structures are mushroom-shaped，umbrella-shaped and funnelshaped，with tubular-shaped volcanic channels． These evidences indicate that the volcanic eruption pattern in this area is dominated by central type eruption． Such a densely distributed group of volcanic structures indicates that this area is one of the eruption centers of the Tarim large igneous province．