额尔古纳市八间房大黑山东火山机构特征

Volcanic edifice characteristics of eastern part of Daheishan in Bajianfang,Erguna City

通过对内蒙古自治区八间房火山岩综合研究发现,大黑山东中心式(破)火山为晚侏罗世满克头鄂博期产物,为中心式火山喷发,是调查区内主要火山喷发活动期之一。在区内形成为一套中酸性火山岩类。火山喷发作用产物构成多个火山岩喷发韵律。从火山口向外形成较完整的火山喷发旋回。通过对该火山机构特征进行阐述,为该区域今后地质找矿工作具有重要指导意义。

Through a comprehensive study of the Bajianfang volcanic rocks in Inner Mongolia Autonomous Region,it was found that the central type(broken)volcano in the eastern part of Daheishan was a product of the Late Jurassic Manketouebo period,and was a central type volcanic eruption,which is one of the main eruptive periods in the survey area.It is one of the main eruptive periods in the survey area.It is formed as a set of medium acidic volcanic rocks in the area.The products of volcanic eruption form multiple volcanic rock eruption rhythms.A more complete volcanic eruptive cycle is formed from the crater outward.By elaborating on the characteristics of this volcanic edifice,it has important guiding significance for future geological exploration work in this region.