The mine zone is sandwiched between an overlying block of flows, pillow lavas and minor pyroclastics, and underlying agglomerates, tuffs, and more massive diabase bodies.

• 含矿带夹在上覆的岩流、枕状岩流和少量火山碎屑岩块与下伏的集块岩、凝灰岩和块状辉绿岩体之间。