【摘要】 鄂东北地区梨木岭矿床为近几年新发现的一脉型钼矿床,矿区内钼矿(化)体受北北东走向的断裂控制,已发现32条赋存其中。通过对矿区内元素异常的分布特征以及矿化富集规律的研究,探讨其对北北东向控矿断裂的指示意义,认为土壤测量元素异常的分布对北北东向控矿断裂的等距性分布以及左行平移性质具有一定的指示意义;岩石测量元素异常分布显示北北东向控矿断裂普遍富集W-Sn-Bi(Ag)等高温元素,中温元素Mo-Cu-Pb-Zn由北西至南东方向则具有富集减弱的水平分带特征;目前工程控制钼矿化垂深600 m,钼矿化富集受断裂性质、岩石破碎变形程度、节理裂隙发育状况及围岩岩性等多种因素影响,主矿体品位厚度显示了明显的水平变化规律,结合矿床地质特征以及成岩成矿的测年数据,认为北北东控矿断裂早白垩世脆性剪切变形作用是钼矿化富集的主导因素。更多还原

【Abstract】 The Limuling molybdenum-polymetallic deposit as a new pulse deposit had found 32 molybdenum mineralization bodies in the NNE faults in the recent years.This paper researches the distribution of the major ore-forming elements and the mineral enrichment regularities,aiming for discussing its implication to the NNE ore-controlling faults.The elements distribution of soil anomaly can signify the isometric distribution and the left translation of the NNE ore-controlling faults.The elements distribution of rock anomaly shows that the NNE ore-controlling faults whicn are commonly rich in high temperature elements W-Sn-Bi(Ag)have the elements zoning characteristics,however medium temperature elements Mo-Cu-Pb-Zn reduce from NW to SE.The vertical depth of molybdenum mineralization is 600 m,the mineral enrichment is affected by several factors,such as the degree of rock fracture,the development of joints and fissures, the lithology of surrounding rocks and the property of the NNE faults.The apparent horizontal changes of the ore body thickness and grade with the deposit geology and the ore-rock ages imply that the brittle shear deformation of the NNE faults in the early Cretaceous is the dominant factor of the mineral enrichment.更多还原