青海省东昆仑夏日哈木Cu-Ni硫化物矿床地质特征及成岩成矿研究

发布时间：2018-03-26 22:03

本文选题：铜镍硫化物矿床　切入点：夏日哈木　出处：《青海大学》2015年硕士论文

【摘要】：夏日哈木矿区位于东昆仑造山带西段,柴达木盆地南缘。为了对夏日哈木矿床成岩成矿特点进行研究,本文从矿床的区域地质特征入手分析,在结合区域地质特征的基础上,进一步深入介绍和分析矿区地质特征。包括矿区地层特征、矿区构造特征、地球物理异常以及球化学异常。认为主要矿体M1受基性杂岩体的控制。同时,利用镜下分析、电子探针等手段,对夏日哈木矿石结构和构造、化学组成、矿物成分做了详细分析。夏日哈木铜镍矿石主要以斑杂状、星点状构造为主。黄铜矿、构造以星点状、斑点状、稀疏浸染状,块状为主。利用夏日哈木基性杂岩体主微量元素以及相关地球化学数据,得出夏日哈木赋矿岩浆岩在演化过程中发生过地壳物质混入过程。最后,结合通过对夏日哈木镍矿床进行区域地质背景、镁铁-超镁铁岩体地质特征、矿区及矿床地质、成矿时代和动力学背景分析,认为夏日哈木镍矿形成于早泥盆世,矿床类型属于岩浆融离-贯入型矿床。
[Abstract]:The summer Hamu ore area is located in the western section of the East Kunlun orogenic belt and the southern margin of the Qaidam basin. In order to study the diagenetic and metallogenic characteristics of the summer Hamu deposit, this paper analyzes the regional geological characteristics of the deposit and combines the regional geological characteristics. The geological characteristics of the ore area are further introduced and analyzed, including the stratigraphic characteristics, tectonic features, geophysical anomalies and spherical chemical anomalies. It is considered that the main ore body M1 is controlled by the basic complex rock mass. At the same time, the analysis is made under the microscope. The structure, structure, chemical composition and mineral composition of summer Hamu ore are analyzed in detail by means of electron probe. Based on the main trace elements and related geochemical data of the summer Hamuji complex, the crustal material mixing process occurred during the evolution of the summer Hamufu magmatic rocks. Based on the analysis of the regional geological background, the geological characteristics of the magnesia-ultramafic body, the ore area and deposit geology, the metallogenic age and the dynamic background, it is considered that the summer Hamu nickel deposit was formed in the early Devonian. The deposit type belongs to magmatic melt-through type deposit.
【学位授予单位】：青海大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：P618.41;P618.63

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