吉林省长白山地区新生代火山岩基本特征及成因模式探讨

The basic features and genetic model of Cenozoic volcanic rocks in Changbai Mountain area, Jilin Province

长白山火山岩区位于滨太平洋构造域西侧,东北大陆裂谷系的东部,北东向断裂较为发育,有敦密断裂、鸭绿江断裂、伊通—依兰断裂等超壳断裂,这些断裂为后期岩浆喷溢提供了通道,也基本控制了火山岩的展布方向。该区新生代以来的火山活动可分为甑峰山期、奶头山期、平顶村期、军舰山期、广坪期、白头山期和天文峰期7个期次,通过对该区的深部构造研究,结合板块运动理论综合分析,笔者将该区火山岩的形成分为了6个阶段,提出了长白山地区火山活动的成因模式。

The volcanic rock area of Changbai Mountain was located in the west shore of the Paciifc tectonic domain, the east of the northeast continental rift system. The NE fracture developed. It includes Dunmi Fault Zone, Yalu River Fault Zone, Yitong-Yilan Fault Zone etc, which provide channels for magmatic eruption and control spreading direction of volcanic rock. The Cenozoic volcano activity can be divided into 7 stages： Zengfeng mountain, Naitou mountain, Pingdingcun, Junjian mountain, Guangping, Baitou mountain and Tianwenfeng stage. Combining with theory of plate tectonics, the authors analyze the area’s deep structure, summarize six stage of the area’s Volcano rock formation, put forward genetic model of volcanic activity in Changbai Mountain area.