火山机构 meaning in English

edifice
volcanic apparatus

It ' s the biggest and youngest volcanic island in china , it has the mosttyical volcano framc ( vcnt ) , thc most abundant volccano sccncrics and thc most complctcly conscrvcd multi - periodical volcanic activities in china
它是我国最大和最年轻的火山岛，具有中国最典型的火山机构（火山口）、中国最丰富的火山景观、中国保存最完整的多期火山活动。
The gold lies the northern of paleovolcanic institution . the main stratum of the mine is arqishan formation of lower - carboniferous series . the annular faults and radial faults of the volcanic mechanism are very development
矿区位于古火山机构的北缘，出露地层为陆相火山岩-火山碎屑岩建造特征的下石炭统阿奇山组，火山机构边缘环状、放射状断裂发育。
Ascertaining the most favorable structure background - radical and annular fault lie in the edge of volcanic mechanism . moreover , according collecting and analysising geochemical samples at different vertical depths of l4 ore body
通过对石英滩金矿床控矿、导矿、容矿构造的系统分析，确定了该矿床形成最有利的构造背景?火山机构边缘环状、放射状断裂。