山西灵丘太白维山多金属矿床的地质特征及成因

Geology and genesis of Taibai-Weishan polymetallic deposit, Lingqiu County, Shanxi Province, China

论证了太白维山大型多金属矿的成因类型和形成年代（140-132.2Ma）。详细研究了晚侏罗世2套不同性质的火山岩系,特别是晚期流纹质火山岩系成矿母岩的岩相类型和地质特征;矿体、火山岩和次火山岩的稀土元素具同源性,它们是上地壳花岗岩重熔所致,并经历过强烈的分馏作用;揭示了太白维山矿区的基本构造特点（在区域NE向断裂构造系统的基础上发展起来的多层次推覆构造）、形成时期及其伴随的快速隆升;认为区域NE向断裂构造、多层次推覆构造及其伴生断裂是三级控岩、控矿构造;隐爆角砾岩也是有利的矿液通道和储集场所。本区还有更大的成矿远景。

Ore genesis of Taibai-Weishan big polymetallic deposit was presented, and the ore deposit forming time from 140 Ma to 132.2Ma. There are two series of late Jurassic volcanics at the area, and the late stage rhyolitic lavas are metallogenic parent rocks. Lithofacies and geological characters of the late stage rhyolitic lavas were described. The REE elements characters show homology of orebodies, volcanics and subvocanic rocks, and they came from refusion of upper crust, and suffered strong fractionation. Primary structure features and forming time of the ore district were revealed, and multi-scale nappe structure overprinted on the NE-trending fracture structure system with rapid regional uplifting. The north-east fracture structure and multi-scale nappe structure of the ore district are the third level controling structures of rock and ore. Explosive breccias are also the favorable pathway and reservoir space of ore fluid. The area are prospective for more ore deposits.