黑龙江五大连池火山群现代火山构造及其形成机制

作者根据野外填图获得的大量第一手资料，对老黑山、火烧山的锥体结构、熔岩构造、火山碎屑物的分布特征及其形成机理等提出了新的认识．确定老黑山是复合锥．火烧山是套迭锥．火山通道受北东向断裂控制，断裂（通道）倾向北西．因此火山碎屑物呈椭园形分布于火山锥的东南侧，这一结论否定了火山碎屑物的分布是受风力影响的说法。火山以间歇喷发与喷溢为特点，形成了三层碎屑物和十七个流动单元的熔岩，覆盖面积约70km~2．恢复后的火山喷发过程，可划分为六个阶段，分析了火山的喷发机制．推测五大连地火山群似有再喷发的危险，应加强观测与研究。

VOLCANIC STRUCTURE OF THE PRESENT-DAY VOLCANIC GROUP WUDALIANCHI AND ITS FORMING MECHANISM

According to numerous original data obtuined in geologic mapping in haoheishan and Huoshaoshan has been advanced new conception about cone construotion, lava structure, contributionof volcanoclastics and their forming mechanism.It has approved that Laoheishan is a complex cone and Huoohaoshan is a cone-in-cone. The volcanic conduits deep to NW, are of the same occurrence as the fault controlling and limit contributionrange of volcanoclastics to the SE. This conclusion negates the hypothesis that contribution of vol-canoclastics is controlled by wind. Volcanos are characterized by sequent explosion and eruption re-sulting 3 beds of volcanoclastfor and 13 flowing units of lava and cover area about 70 km2. Processof volcanic outbreak can be suboivided into 7 stages. It has inferred by analysing the mechanism ofvolcanic outbreak that volcanic group Wudalianchi may once again outbreak and must be urgentlyobserved and studied.