摘要
东小山火山遗迹位于吉林省中部伊通盆地东缘,火山活动产物,玄武岩同位素年龄5.46±0.32Ma,为著名的伊通火山群成员之一(图1)。伊通火山群的火山机制,以往研究者多认为具火山口构造的火山锥和剥蚀后的火山颈。
The Dongxiaoshan volcano is a member of the famous Yitong volcanic cluster.In the past,most researchers considered the Dongxiaoshan volcano as the crater structure,and hold that its basalt and internal clasties all belong to eruptive facies.Through the analysis on the distribution of the Dongxiao- shan volcanics,occurrence of the rockbodies,denudation in late stage,etc.the authors hold that the existing volcanic mechanism in the Dongxiaoshan should be the remaining volcanic neck after denudation,and the basalt and internal clastics all belong to volcanic neck facies.
出处
《吉林地质》
1989年第3期85-90,84,共6页
Jilin Geology
