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大椅山火山是龙岗火山群的一个组成部分,其地质特征与龙岗火山群的其它火山相类似。龙岗火山群位于吉林省东南部,横跨辉南、靖宇两县境,在东西长六十多公里、南北宽十余公里的几百平方公里面积上,分布有大椅山、佟家旺、孤山子、金龙顶子、三角龙湾等百余座火山。各火山锥体及其周围蕴藏着丰富的火山渣、浮石资源。该区的火山渣、浮石多孔、质轻,保温、隔音性能较好,是良好的天然轻骨料。一、地质概况该区地层主要为第四系,仅局部出露有鞍山群杨家店组混合花岗岩(Ary)。
The Big Chair Mountain Volcano is an integral part of Longgang volcano group and its geological characteristics are similar to other volcanoes in Longgang volcano group. Longgang volcanic group is located in southeastern Jilin Province, across Huinan, Jingyu two counties in the east-west long more than 60 kilometers, north-south width of more than ten kilometers of hundreds of square kilometers of area, the distribution of chair mountain, Tong Jiawang, Gushanzi , Golden Dragon Top, Triceal Bay and so on a hundred volcano. Each volcano cone and its surroundings are rich in volcanic slag, pumice stone resources. The area of volcanic slag, pumice porous, light weight, thermal insulation, sound insulation performance is good, is a good natural light aggregate. First, the geological overview The main strata in the area Quaternary, only exposed Anshan Group Yangjiadian group mixed granite (Ary).