云南江城巖腳鉛鋅礦床地球物理異常解譯及找礦預(yù)測(cè)
發(fā)布時(shí)間：2018-11-17 10:44
【摘要】：江城巖腳鉛鋅礦位于蘭坪—思茅中生代坳陷盆地南段,普洱—江城坳陷盆地中,江城縣城南西13km,夾持于李仙江斷裂與把邊江斷裂之間。礦床在沉積成巖(成礦)作用的基礎(chǔ)上,經(jīng)后期以熱鹵水為主的改造疊加所形成。本文從基礎(chǔ)地質(zhì)研究入手,經(jīng)過(guò)野外地質(zhì)調(diào)研,在收集了大量的的第一手地質(zhì)資料的基礎(chǔ)上,通過(guò)大量宏觀和微觀資料的分析研究,進(jìn)行了成礦作用及礦床成因研究。認(rèn)為該礦床屬沉積—改造層控型鉛鋅礦床。其成礦過(guò)程可分為兩種機(jī)制,即同生定位和后生定位,礦床的成礦作用具有多源,多種轉(zhuǎn)移匯集方式和多種改造疊加的特點(diǎn)。其中成礦、富化的更重要因素是熱鹵水的改造作用。同時(shí)結(jié)合了物探勘探方面的研究,對(duì)現(xiàn)有礦體以外的地區(qū)用激電中梯工作及物探音頻大地電磁法測(cè)探方法進(jìn)行了解異,提出了4個(gè)有利的找礦靶區(qū)。在結(jié)合了上述工作的基礎(chǔ)上,本文通過(guò)成礦建造、控礦構(gòu)造和物探勘探的研究,獲得以下主要成果：1.通過(guò)對(duì)主要的控礦因素的分析,得知構(gòu)造、地層和巖性等因素控制了礦床的成礦作用,其中構(gòu)造對(duì)成礦的控制作用尤為明顯,礦床均賦存在白堊系下統(tǒng)景星組地層中,含礦巖石為中粒石英砂巖及紫色、淺紫色交互帶的泥質(zhì)粉砂巖。2.通過(guò)對(duì)礦區(qū)進(jìn)行激電中梯工作及物探音頻大地電磁法測(cè)探得到以下成果：基本了解了礦區(qū)的激電特征,有效的驗(yàn)證了部分地層的地質(zhì)界線(xiàn)以及斷裂構(gòu)造的出露分布,并在礦區(qū)圈定了5個(gè)激電異常區(qū)；驗(yàn)證2條一級(jí)構(gòu)造,1條二級(jí)構(gòu)造,推斷5條一級(jí)構(gòu)造,7條二級(jí)構(gòu)造；8處一級(jí)異常區(qū),3處二級(jí)異常區(qū)；推斷4條有利成礦帶；3.在綜合研究的基礎(chǔ)上,系統(tǒng)總結(jié)了成礦預(yù)測(cè)規(guī)律,結(jié)合物探研究數(shù)據(jù),提出了有利的找礦靶區(qū),分析了預(yù)測(cè)區(qū)內(nèi)的找礦前景。
[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.
【學(xué)位授予單位】：昆明理工大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2015
【分類(lèi)號(hào)】：P618.4
本文編號(hào)：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.
【學(xué)位授予單位】：昆明理工大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2015
【分類(lèi)號(hào)】：P618.4
【參考文獻(xiàn)】
相關(guān)期刊論文 前1條
1 劉本培,馮慶來(lái),方念喬,賈進(jìn)華,何馥香;滇西南昌寧—孟連帶和瀾滄江帶古特提斯多島洋構(gòu)造演化[J];地球科學(xué);1993年05期
，本文編號(hào)：2337487
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