西藏玉龙铜矿床Ⅰ矿体地质特征及其储量验证

发布时间：2018-04-20 12:27

本文选题：玉龙铜矿 + 地质特征　；参考：《成都理工大学》2015年硕士论文

【摘要】：西藏玉龙铜(钼)矿床位于特提斯构造域东段的三江构造带内,构造格局十分复杂,所属的玉龙斑岩铜(钼)矿带不仅是我国重要的铜矿成矿远景区带,藏东昌都地区也是我国重要的有色金属工业基地。西藏玉龙铜矿床是西藏境内发现最早,也是第一个勘查成型的斑岩型铜矿床,长期以来备受关注。矿体地质特征作为矿床地质特征的核心部分,是成矿作用、控矿构造、成矿结构面、矿床类型、找矿方向等判定的最基本的约束,然而长期以来矿体地质特征研究常常被人忽视,导致对成矿作用、控矿构造、成矿结构面等问题众说纷纭,莫衷一是,严重妨碍了了研究工作的深入和更大的找矿成就的突破和取得。前人曾对玉龙铜矿床做过较为系统的研究,但相关研究是基于极为有限的勘查工程进行的,后期商业性勘查项目的介入投入了大量勘查工程,但基本上都未做深入研究,仅根据品位进行了矿体圈定,因此,有关矿体地质特征的认识依然存在局限,作者以玉龙铜矿床Ⅰ矿体为研究对象,针对最基础的Ⅰ矿体地质特征选题具有较大的理论意义和现实意义。笔者在前人研究的基础上,全面收集了玉龙矿床各种地质勘查成果资料,结合自己在矿区多年的实际工作经验和认识,重新对部分钻孔的岩心样品就行重新的编录,并且对Ⅰ号矿体进行了详实的野外调查。利用公司新引入的DIMINE三维数字化矿山软件,构建了Ⅰ号矿体三维实体模型,对其进行了全方位、多视角、多层次的剖析并且用软件重新进行了储量估算。通过实地调查和论文写作,深化了对Ⅰ号矿体的成矿背景和基本地质特征的认识,Ⅰ号矿体铜资源量占全矿区总铜资源量的80%以上,以斑岩型和角岩型浸染状硫化铜矿石为主,是小岩体成大矿的典型代表矿床。利用DIMINE软件对矿体全面剖析了不同切面、断面的形态特征、品位变化特点。比较直观形象的展示了矿体品位和矿化具有浅部富集、深部贫化特点。空间上不同品位斑块呈斑杂状镶嵌显示出成矿过程的多期性特征和岩体成岩成矿的特点。运用DIMINE软件对矿体进行距离幂反比法估值,并与地勘单位广泛使用的块段法进行对比发现,无论是矿体的矿石量、金属量还是品位变化系数均小于10%,处于比较合理的浮动区间,因此DIMINE软件在实体建模与估算储量方面有着很好的使用效果,能够直观的显示矿体实际形态,高效精确的估算整个矿体和局部块段的储量,可靠性比较强,在玉龙矿区今后的地勘工作和资源开发方面将有着广泛的应用。
[Abstract]:The Yulong copper (molybdenum) deposit in Tibet is located in the Sanjiang structural belt in the eastern section of the Tethys tectonic domain, and the tectonic framework is very complex. The Yulong porphyry copper (molybdenum) ore belt is not only an important copper ore metallogenic area in China. Changdu area in eastern Tibet is also an important non-ferrous metal industry base in China. Yulong copper deposit in Tibet is the earliest discovered and the first porphyry copper deposit in Tibet. As the core part of the geological characteristics of ore deposits, orebody geological features are the most basic constraints for the determination of ore-forming processes, ore-controlling structures, ore-forming structural planes, deposit types, ore-prospecting directions, etc. However, for a long time, the study of geological characteristics of orebodies is often ignored, which leads to different opinions on ore-forming processes, ore-controlling structures, ore-forming structural planes, etc. It seriously hinders the further research and the breakthrough and achievement of ore prospecting. Previous studies on the Yulong copper deposit have been systematic, but the related research is based on a very limited exploration project. In the late stage, a large number of exploration projects were invested in commercial exploration projects, but basically no in-depth study was done. Only according to the grade, the ore body is delineated. Therefore, there are still some limitations in the understanding of the geological characteristics of the orebody. The author takes the Yulong copper deposit I orebody as the research object. It is of great theoretical and practical significance to select the most basic geological features of orebody I. On the basis of previous studies, the author has collected all kinds of geological exploration data of Yulong deposit, combined with his practical working experience and understanding in the mine area for many years, and recataloged some core samples from boreholes. A detailed field investigation was carried out on the No. 1 orebody. The 3D solid model of No. 1 ore body is constructed by using the newly introduced DIMINE 3D digitized mining software of the company. The 3D solid model of No. 1 ore body is analyzed in all directions, from multiple perspectives and at different levels, and the reserves are estimated again with the software. Through field investigation and paper writing, the metallogenic background and basic geological characteristics of No. 1 ore body are deepened. The copper resources of No. 1 ore body account for more than 80% of the total copper resources in the mining area, and the main copper ore is porphyry type and hornstone type disseminated copper sulfide ore. It is a typical ore deposit of small rock mass. In this paper, DIMINE software is used to analyze the shape and grade change of different sections and sections of ore bodies. The ore body grade and mineralization have the characteristics of shallow enrichment and deep dilution. The plaques of different grade in space show the multi-stage characteristics of metallogenic process and the characteristics of diagenesis and metallogenesis of rock masses. By using DIMINE software, the distance power inverse ratio method is used to estimate the ore body, and compared with the block section method widely used in geological prospecting units, it is found that both the ore quantity, metal quantity and grade change coefficient of ore body are less than 10, and they are in a reasonable floating range. Therefore, DIMINE software has a good effect in solid modeling and reserves estimation, it can show the actual shape of orebody intuitively, estimate the reserves of the whole orebody and local block section efficiently and accurately, and the reliability is relatively strong. It will be widely used in geological prospecting and resource development in Yulong mining area.
【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

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