云南江城岩脚铅锌矿床地球物理异常解译及找矿预测
发布时间：2018-11-17 10:44
【摘要】：江城岩脚铅锌矿位于兰坪—思茅中生代坳陷盆地南段,普洱—江城坳陷盆地中,江城县城南西13km,夹持于李仙江断裂与把边江断裂之间。矿床在沉积成岩(成矿)作用的基础上,经后期以热卤水为主的改造叠加所形成。本文从基础地质研究入手,经过野外地质调研,在收集了大量的的第一手地质资料的基础上,通过大量宏观和微观资料的分析研究,进行了成矿作用及矿床成因研究。认为该矿床属沉积—改造层控型铅锌矿床。其成矿过程可分为两种机制,即同生定位和后生定位,矿床的成矿作用具有多源,多种转移汇集方式和多种改造叠加的特点。其中成矿、富化的更重要因素是热卤水的改造作用。同时结合了物探勘探方面的研究,对现有矿体以外的地区用激电中梯工作及物探音频大地电磁法测探方法进行了解异,提出了4个有利的找矿靶区。在结合了上述工作的基础上,本文通过成矿建造、控矿构造和物探勘探的研究,获得以下主要成果：1.通过对主要的控矿因素的分析,得知构造、地层和岩性等因素控制了矿床的成矿作用,其中构造对成矿的控制作用尤为明显,矿床均赋存在白垩系下统景星组地层中,含矿岩石为中粒石英砂岩及紫色、浅紫色交互带的泥质粉砂岩。2.通过对矿区进行激电中梯工作及物探音频大地电磁法测探得到以下成果：基本了解了矿区的激电特征,有效的验证了部分地层的地质界线以及断裂构造的出露分布,并在矿区圈定了5个激电异常区；验证2条一级构造,1条二级构造,推断5条一级构造,7条二级构造；8处一级异常区,3处二级异常区；推断4条有利成矿带；3.在综合研究的基础上,系统总结了成矿预测规律,结合物探研究数据,提出了有利的找矿靶区,分析了预测区内的找矿前景。
[Abstract]:Jiangcheng Yanjiao lead-zinc deposit is located in the southern section of the Lanping-Simao Mesozoic depression, in the Pu 'er-Jiangcheng depression basin, and in the south of Jiangcheng County, 13 km west of Jiangcheng County, between the Li Xianjiang fault and the Jiabanjiang fault. The deposit was formed on the basis of sedimentary diagenesis and superposition of thermal brine. This paper begins with the basic geological research, through the field geological investigation, on the basis of collecting a large number of first-hand geological data, through a lot of macro and micro data analysis and research, carried on the metallogenesis and the genesis of the deposit. It is considered that the deposit belongs to sedimentary-reformation-controlled lead-zinc deposit. The ore-forming process can be divided into two kinds of mechanisms, that is, syngenic location and epigenetic location. The metallogenic process of the deposit has the characteristics of multi-source, multi-transfer, gathering and superposition. The transformation of hot brine is a more important factor of mineralization and enrichment. At the same time, combined with the research of geophysical exploration, four favorable ore-prospecting target areas are put forward in this paper, which are different from the existing areas outside the orebody by using the work of induced electric medium ladder and geophysical sounding audio frequency magnetotelluric method. On the basis of the above work, through the study of metallogenic formation, ore-controlling structure and geophysical exploration, the main results are as follows: 1. Through the analysis of the main ore-controlling factors, it is found that structural, stratigraphic and lithologic factors control the mineralization of the deposit, especially the tectonic control of the ore-forming, which occurs in the strata of the lower Cretaceous Tongjingxing formation. The ore-bearing rocks are medium-grained quartz sandstone and shaly siltstone with purple and light purple interaction zones. 2. The following results are obtained by working on the middle echelon of IP in the mining area and geophysical exploration by audio frequency magnetotelluric method: the characteristics of the induced electricity in the mining area are basically understood, and the geological boundary of some strata and the outburst distribution of the fault structure are effectively verified. Five anomalous areas of IP have been delineated in the mining area. 2 primary structures, 1 secondary structure, 5 primary structures, 7 secondary structures, 8 primary anomalies, 3 secondary anomalies, 4 favorable metallogenic belts, 3. On the basis of comprehensive research, the metallogenic prediction law is systematically summarized, combined with the geophysical research data, the favorable prospecting target area is put forward, and the prospecting prospect in the prediction area is analyzed.
【学位授予单位】：昆明理工大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：P618.4
本文编号：2337487
[Abstract]:Jiangcheng Yanjiao lead-zinc deposit is located in the southern section of the Lanping-Simao Mesozoic depression, in the Pu 'er-Jiangcheng depression basin, and in the south of Jiangcheng County, 13 km west of Jiangcheng County, between the Li Xianjiang fault and the Jiabanjiang fault. The deposit was formed on the basis of sedimentary diagenesis and superposition of thermal brine. This paper begins with the basic geological research, through the field geological investigation, on the basis of collecting a large number of first-hand geological data, through a lot of macro and micro data analysis and research, carried on the metallogenesis and the genesis of the deposit. It is considered that the deposit belongs to sedimentary-reformation-controlled lead-zinc deposit. The ore-forming process can be divided into two kinds of mechanisms, that is, syngenic location and epigenetic location. The metallogenic process of the deposit has the characteristics of multi-source, multi-transfer, gathering and superposition. The transformation of hot brine is a more important factor of mineralization and enrichment. At the same time, combined with the research of geophysical exploration, four favorable ore-prospecting target areas are put forward in this paper, which are different from the existing areas outside the orebody by using the work of induced electric medium ladder and geophysical sounding audio frequency magnetotelluric method. On the basis of the above work, through the study of metallogenic formation, ore-controlling structure and geophysical exploration, the main results are as follows: 1. Through the analysis of the main ore-controlling factors, it is found that structural, stratigraphic and lithologic factors control the mineralization of the deposit, especially the tectonic control of the ore-forming, which occurs in the strata of the lower Cretaceous Tongjingxing formation. The ore-bearing rocks are medium-grained quartz sandstone and shaly siltstone with purple and light purple interaction zones. 2. The following results are obtained by working on the middle echelon of IP in the mining area and geophysical exploration by audio frequency magnetotelluric method: the characteristics of the induced electricity in the mining area are basically understood, and the geological boundary of some strata and the outburst distribution of the fault structure are effectively verified. Five anomalous areas of IP have been delineated in the mining area. 2 primary structures, 1 secondary structure, 5 primary structures, 7 secondary structures, 8 primary anomalies, 3 secondary anomalies, 4 favorable metallogenic belts, 3. On the basis of comprehensive research, the metallogenic prediction law is systematically summarized, combined with the geophysical research data, the favorable prospecting target area is put forward, and the prospecting prospect in the prediction area is analyzed.
【学位授予单位】：昆明理工大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：P618.4
【参考文献】
相关期刊论文 前1条
1 刘本培,冯庆来,方念乔,贾进华,何馥香;滇西南昌宁—孟连带和澜沧江带古特提斯多岛洋构造演化[J];地球科学;1993年05期
，本文编号：2337487
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