摘要
本文从蛇绿岩角度重新分析德尔尼铜钴多金属硫化物矿床资料,认为德尔尼矿床产于陆缘裂谷,控矿岩是蛇绿岩,赋矿的超铁镁岩是“变质橄榄岩”而不是超镁铁火山岩,成矿作用不和火山沉积作用发生关系,主要是地幔岩重熔硫化矿浆贯入上地幔裂隙系统而形成原始矿体,随裂谷复杂演化发生变质变形,后经多次热液叠加以及表生改造,是一种新类型铜多金属硫化物矿床。基此提出深部找矿可能取得突破。
Taking advantage of the method of studying on ophiolite to analyse the data of copper-Cobalt and polymetallicsulphide deposit of Deerni,the conclusion is reached that Deerni deposit was formed in the epicontinental rift.The rock ofControlling mineralization is the ophiolite and hosting ultramafic rock is not ultramafic yolcano-rock but metamorphicperidotite.There is no relation between mineralization and volcano-sedimentation.With sulfide mineralizing magma ofanatectic pyrolite injecting into the cracks Of upper mantle,the origional ore bodies were formed and developed into a new typeof copper-polymetallic sulphide deposit through metamorphic deformation,multiple superimposed hydrothermalism andexogenic reformation companying with complex evolutional process of the rift.So deep prospecting is considered as a possiblesuccessful way.
关键词
铜矿床
成矿条件
德尔尼矿床
metamorphic“peridotite”partly anatectic pyrolite anatectic sulfide mineralizing magma copper deposit of Deerni Type
