火山筒（volcanic pipe）又称火山管(volcanic chimney)。岩浆喷出地表时形成的圆形或近圆形的地下通路,常被熔岩、火山碎屑岩所充填。
晋东北地区出露一系列与燕山期富碱的酸性、中酸性浅成相-次火山相有成因联系的爆破角砾岩筒。
A series of explosive breccia pipes, related to acid rich-alkaline subvolcanic rocks of Yanshan period in origin, occur in the Northeast Shanxi Province.
本文研究了含铁火山角砾岩筒的形态、内部结构和成因问题。
The morphology, inner structure and problems of the iron-bearing diatremes genesis are considered.
主要控矿条件为小岩株状石英闪长玢岩（次火山岩），其中寄生的隐爆角砾岩筒及外围裂隙中赋存着金矿体；
The main control condition is quartz diorite-porphyrite with the shape of small rock stub(subvolcanic rocks), among the parasitic rubblerack tube and the off-lying crack, the gold orebody occurs.
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