长期以来,老乌火山岩被认为是闪长岩类侵入体。本文着重论述了老乌火山岩系的岩石学某些特征,地层对比及古火山机构。老乌火山岩系属钙碱性玄武岩类,高铝、高钾、低钠、低钙、低镁,局部有铜、铁、钛的聚集,是前寒武纪富良棚期海底火山喷发的产物,可分为三个喷发韵律,后期有次火山岩侵入。火山岩系较塔甸剖面发育完全。古火山口在岩系的中部。 For a long time, the Laowu volcanic rocks are considered as diorite intrusions. This article focuses on some petrological characteristics of Laowu volcanic rock series, stratigraphic contrast and paleo-volcanic institutions. Laowu volcanic rocks belong to the class of calc-alkaline basalt, high aluminum, high potassium, low sodium, low calcium, low magnesium, local copper, iron, titanium accumulation, is the product of the submarine volcanic eruption in the prosperous Cambrian period, Can be divided into three eruptive rhythms, later volcanic rocks invaded. Volcanic rocks than Tadan profile complete development. Ancient crater in the middle of the rock series.