西藏波龙铜（金）矿矿体地质要素特征研究

发布时间：2018-05-29 12:03

本文选题：波龙铜(金)矿床 + 斑岩型　；参考：《成都理工大学》2015年硕士论文

【摘要】：多龙矿集区位于班公湖-怒江成矿带西段,以其矿床规模巨大、类型多样、研究程度较高而备受关注。波龙斑岩型铜(金)矿床是多龙矿集区大型矿床之一。本文优选矿体特征研究程度较低的波龙矿床为研究对象,在充分了解了矿区的地层、构造、岩浆岩及围岩蚀变类型的基础之上,对矿床地质要素进行了详细的研究。波龙矿区矿体主要赋存于中酸性花岗闪长斑岩和曲色组长石石英砂岩中。受斑岩体主动侵位和气水隐爆作用,使岩体周边接触带附近的围岩形成大量交错状、网脉状裂隙。为成矿物质的运移提供通道,使成矿物质在裂隙沉淀成矿。矿化多呈细脉状充填于裂隙中,也可见浸染状矿化的分布。矿物类型主要为黄铜矿、黄铁矿,可见少量的斑铜矿、辉钼矿。根据矿区近两年的钻探工程资料,并结合样品测试分析,对矿床地质要素进行解析研究,通过对矿床地质要素以及相互之间关系的综合研究得出以下认识:波龙矿区控矿因素主要为花岗闪长斑岩、长石石英砂岩以及岩浆侵位时发育的裂隙构造。矿区矿体主要赋存于中酸性侵入岩以及靠近侵入岩分布的长石石英砂岩中,岩体及围岩蚀变发育,从内向外主要发育钾硅酸盐化、石英-绢云母化、绿泥石-绿帘石化。波龙矿区侵入岩呈近直立的扁椭圆状的不规则体,岩体顶面凹凸不平。矿区侵入岩体在工程控制范围内整体呈北高-中部底的趋势,中部控制厚度较大。矿区中部岩体的底界未控制。推测岩浆热液的聚集中心在矿区中部,并以此为中心向北西、北东以及南东向运移。波龙矿区成矿热液聚集中心为矿区中部ZK17101附近区域,以此为中心矿液向四周运移,矿体整体呈不规则的火焰状,平面呈似椭圆形状,整体呈东西走向,倾向南。矿体顶、底部凹凸不平,相对高差较大。波龙矿区矿体东西向主要分布在187-155勘探线之间,南北向主要分布在02-07排之间。矿区矿体厚度具有中部厚,边缘薄的特点。矿体四周边界已被控制,只有矿区北东部可能有少量矿体出露,深部矿体边界未被控制,说明深部还有巨大的找矿潜力。通过岩体和矿化关系的研究,成矿和岩体密切相关,成矿晚于岩浆侵位,成矿热液上侵利用了岩浆侵位形成的通道系统,但沉积范围更广,以致岩体并非全岩矿化,岩体与围岩均容矿。根据矿体厚度等值线图和品位×厚度等值线图表明,成矿热液最初聚集场所为侵入岩分布厚度大的部位。后期成矿热液沿着岩体裂隙侵位,在岩体裂隙聚集及沉淀,同时沿着长石石英砂岩的原生或次生裂隙运移及沉淀。导致侵入岩体和长石石英砂岩中都富集成矿物质。根据品位×厚度等值线图表明,Cu品位由矿区中部向四周逐渐降低,在侵入岩体厚度大的部位品位值较高,说明成矿物质在侵入岩体中聚集程度较高。综上所述,通过对矿化与其他相关地质体关系的分析研究,可以看出波龙矿区中部的深部以及矿区北东部有找矿潜力,其中,深部找矿存在很大的潜力。
[Abstract]:The duo dragon mine area is located in the west section of the ban Gong Lake Nu River metallogenic belt, with its large scale, variety and high degree of study. The porphyry copper (gold) deposit of the porphyry type is one of the large ore deposits in the duo dragon ore area. On the basis of structural, magmatic rocks and surrounding rock alteration types, the geological elements of the deposit are studied in detail. The orebodies of the PORON mining area mainly occur in the medium acid granodiorite porphyry and the zigzag feldspar quartz sandstone. The active emplacement and gas explosion of the porphyry rocks make the surrounding rock around the surrounding contact zone of the rock mass form a large number of interlaced forms. The net veins fissures provide channels for the migration of mineral formation to deposit minerals in fissure deposits. The mineralization is usually filled with fine veins in fissures and also in the distribution of disseminated mineralization. The mineral types are mainly chalcopyrite, pyrite, and a small amount of porphyry and molybdenite. The geological elements of the deposit are analyzed and analyzed. Through the comprehensive study of the geological elements and the relationship between the deposits, the following understanding is drawn: the ore controlling factors are mainly the granodiorite porphyry, the feldspar quartz sandstone and the fissures developed during the emplacement of the magma. The ore bodies of the mining area are mainly in the middle acidic intrusive rocks. In the feldspar quartz sandstone near the intrusive rocks, the rock and surrounding rock alteration is developed, and the main development of rock and rock is potassium silicate, quartz sericite, chlorite and epidote. The intrusive rocks of the perilong mining area are near erect and elliptical irregular bodies, and the top surface of the rock mass is not flat and uneven. The intrusive rock mass in the mining area is integrated within the control range of the project. There is a trend of North High and central bottom, and the central control thickness is larger in the middle part. The bottom boundary of the rock mass is not controlled in the middle part of the mining area. It is assumed that the center of the magmatic hydrothermal solution is in the middle of the mining area, and the center is moved toward the North West, the North East and the South East, and the center of the hydrothermal fluid accumulation in the middle of the mining area is near the ZK17101 area in the middle of the mining area. The ore body has an irregular flame shape, the plane appears elliptical shape, the whole is east-west, the ore body is heading south, the ore body is top, the bottom is uneven and the relative high difference is large. The ore body is mainly distributed between the 187-155 exploration lines and the north and south direction is mainly distributed between the 02-07 rows. The ore body thickness of the mining area is of the middle thickness and the edge is thin. Characteristics. The surrounding boundary of the ore body has been controlled, only a small amount of ore bodies may be exposed in the eastern part of the mining area, and the deep ore body boundary is not controlled, indicating that there is a great potential for prospecting in the deep part. According to the contour map of the ore body thickness and the contour map of the grade and thickness, the initial gathering place of the ore-forming hydrothermal fluid is the part of the large thickness of the intrusive rock. The later metallogenic hydrothermal fluid is emplacement along the rock fracture, and it is aggregated and precipitated in the rock fracture. When the primary or secondary fissure of the feldspar quartz sandstone is migrated and precipitated, both the intrusive rock mass and the feldspar quartz sandstone are rich in minerals. According to the contour map of the grade and thickness, the grade of Cu is gradually reduced from the middle of the mining area to the surrounding area, and the value of the product position is higher in the area with large thickness of the intrusive rock, indicating that the minerals are intruded in the intrusive rock mass. In summary, through the analysis of the relationship between mineralization and other related geological bodies, it can be seen that the deep part of the central part of the Po long mining area and the northern East of the mining area have the potential for prospecting, and there is a great potential for the deep prospecting.
【学位授予单位】：成都理工大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：P618.41;P618.51

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