综合地球物理方法在小牛群西部铜多金属矿产勘查中的应用研究

发布时间：2017-12-27 16:56

本文关键词：综合地球物理方法在小牛群西部铜多金属矿产勘查中的应用研究　出处：《东华理工大学》2017年硕士论文　论文类型：学位论文

【摘要】：小牛群西部地区成矿带归属于华北地台北缘成矿区(Ⅱ3)乌拉山-集宁-阜新太古代、燕山期金、银、铁、铜、铅、锌、石墨、白云母成矿带(Ⅲ10),大水清-热水金、铜成矿带(Ⅳ107)中段,明干山-大水清金、铜成矿带(Ⅴ107-1)的南西部,是多金属成矿的有利地段。研究区出露岩性复杂,断裂构造及脉岩发育。前人研究结果表明研究区内铜及多金属成矿受断裂构造控制,基底与盖层的接触部位是成矿有利部位,矿(化)体主要受北东向断裂构造及中基性脉岩控制。论文开展对地面高精度磁测和时间法域激电法研究,利用地面高精度磁法圈定地层、构造格架、脉岩的空间分布。利用时间域激发极化法查明区内铜、铅、锌等金属硫化物的空间分布情况。取得了以下认识:1.以小牛群-三家复背斜为中心,中侏罗统新民组中酸性火山岩盖层向两翼逐渐变厚,复背斜核部盖层被剥蚀殆尽,寒武系老地层及三叠世花岗岩大面积出露,并沿北东向展布。盖层与基底呈角度不整合接触,以北东向F1、F2断裂为分界。区内脉岩发育,主要为花岗斑岩、闪长岩,以岩脉、岩株的形式产出;展布方向均受北东断裂控制。2.研究区存在两条激电异常带,分别位于小牛群-三家复背斜两侧,均分布于基底与盖层的接触带处,受北东向断裂控制,地表见有黄铜矿化、黄铁矿化等蚀变。最后通过地表工程及钻探工程查证,验证了综合物探方法在该地区寻找铜多金属矿产的有效性。
[Abstract]:The cattle in western region of metallogenic belt belongs to the northern margin of North China Craton metallogenic region (II 3) - Jining - Fuxin Archean Wulashan, Yanshan gold, silver, iron, copper, lead, zinc, graphite, muscovite metallogenic belt (III 10), dashuiqing gold and copper metallogenic belt - hot water (107 middle IV) Ming - Qing Shan, flood of gold and copper metallogenic belt (V 107-1) South West, is favorable area for polymetallic metallogenesis. The lithology of the study area is complex, the fracture structure and the development of the vein rock. Previous studies show that the copper and polymetallic mineralization in the study area are controlled by fault structures. The contact area between basement and cap rocks is favorable for mineralization. Ore bodies are mainly controlled by NE trending faults and intermediate basic veins. In this paper, the research of high precision magnetic survey and time domain excitation method is carried out, and the ground high precision magnetic method is used to delineate the formation, tectonic framework and the spatial distribution of the pulse rock. The spatial distribution of copper, lead, zinc and other metallic sulphides in the region was detected by the time domain excitation polarization method. Made the following understanding: 1. to three small cattle - anticlinorium is the center of the Middle Jurassic Xinmin group acidic volcano rock layer to the wings became thicker, complex anticline core cover layer is eroded, Cambrian strata and three old Triassic granite area exposed, and along the North East trending. The caprock is unconformable with the base, and the F1 and F2 faults in the North East are divided. The development of the vein rocks in the area is mainly granite porphyry and diorite, which is produced in the form of rock veins and rock strains, and the distribution direction is controlled by the North East fault. 2., there are two IP anomalies in the study area, which are located on both sides of the small cattle three complex anticlinal area, which are distributed at the contact zone between the basement and the cap rock. They are controlled by the NE trending faults, and there are copper mineralization and pyrite alteration on the surface. Finally, through the investigation of surface engineering and drilling engineering, the effectiveness of comprehensive geophysical prospecting method in finding copper polymetallic minerals in this area is verified.
【学位授予单位】：东华理工大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：P631;P618.2

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