【摘要】：湖南寶山地區(qū)位于南嶺東西向構(gòu)造-巖漿成礦帶中段北緣,處于南嶺W、Sn、Mo、Bi、Cu、Pb、Zn、Au、Ag、Fe、Mn等元素高度濃集的地球化學(xué)塊體之中,是南嶺多金屬成礦帶的重要組成部分。本文通過(guò)對(duì)湖南寶山地區(qū)1:5萬(wàn)水系沉積物地球化學(xué)測(cè)量數(shù)據(jù)進(jìn)行地球化學(xué)參數(shù)特征統(tǒng)計(jì),運(yùn)用相關(guān)分析、R型聚類(lèi)分析、因子分析方法進(jìn)行元素的共生組合特征分析;對(duì)單元素地球化學(xué)異常、綜合異常區(qū)根據(jù)其所處的地質(zhì)背景進(jìn)行了解析評(píng)價(jià);結(jié)合區(qū)內(nèi)地質(zhì)、礦產(chǎn)、地球物理、地球化學(xué)特征進(jìn)行綜合分析,圈定找礦靶區(qū),取得了以下認(rèn)識(shí):1、寶山地區(qū)出露地層主要為泥盆系、石炭系、二疊系等,先后經(jīng)歷了加里東運(yùn)動(dòng)、海西運(yùn)動(dòng)、印支運(yùn)動(dòng)、燕山運(yùn)動(dòng)、喜山運(yùn)動(dòng)等多次構(gòu)造活動(dòng)。巖漿巖出露面積不大,巖體規(guī)模小,主要為燕山早期酸性-中酸性花崗斑巖、花崗閃長(zhǎng)斑巖、石英斑巖等。2、研究區(qū)內(nèi)各元素間的總體相關(guān)性較好,相關(guān)性最強(qiáng)的為Pb與Ag、Zn、Bi,Cu與Zn,其相關(guān)系數(shù)0.8,呈強(qiáng)正相關(guān);其次是Au、W、Sn、Sb、As,Ni、V、Co、Cr、Mn等元素間的相關(guān)系數(shù)介于0.5-0.8之間,呈正相關(guān);F、La、Hg元素與其它元素間相關(guān)系數(shù)較低甚至為負(fù)相關(guān)。3、對(duì)19種元素進(jìn)行地球化學(xué)異常特征分析,圈定了38處單元素異常,在單元素異常的基礎(chǔ)上,共圈定8處綜合異常,其中有進(jìn)一步擴(kuò)大礦床(點(diǎn))找礦遠(yuǎn)景的A1類(lèi)異常1處,已知礦床能很好地解釋引起異常原因的A2類(lèi)異常2處,推斷可能發(fā)現(xiàn)礦點(diǎn)的B3類(lèi)異常5處。異常與已知礦(床)點(diǎn)的吻合程度較高,為礦產(chǎn)普查提供了大量的找礦信息。通過(guò)分析區(qū)內(nèi)的地層、巖性、構(gòu)造、巖漿巖、地球物理、地球化學(xué)等諸方面控礦因素,以寶山鉛鋅銀多金屬礦床為典型礦床,建立了區(qū)內(nèi)找礦模式,提出了找礦標(biāo)志,圈定了麥子坪-金子崗-梧桐鉛鋅多金屬找礦靶區(qū)與禾茂村-馬鞍嶺鉛鋅多金屬礦找礦靶區(qū),為區(qū)內(nèi)開(kāi)展下一步工作尋找鉛鋅多金屬礦提供有意義的幫助。
[Abstract]:Baoshan area, Hunan Province, is located in the northern margin of the east-west tectonic-magmatic metallogenic belt in Nanling. It is located in the highly concentrated geochemical blocks of WSnMo, Mo, Bi, Cuand Pb, au, Fe, mn and other elements in Nanling WSN, Mo, Bi, Pb, au, Fe, mn and other elements. It is an important part of Nanling Polymetallic metallogenic belt. In this paper, the geochemical parameter characteristics of 1: 50 000 stream sediment geochemistry survey data in Baoshan area of Hunan Province are counted, and the symbiotic assemblage characteristics of elements are analyzed by correlation analysis, R-type cluster analysis and factor analysis. The single element geochemical anomaly is analyzed and evaluated according to its geological background. Based on the comprehensive analysis of geological, mineral, geophysical and geochemical characteristics in the area, the prospecting target areas are delineated, and the following understandings are obtained: 1. The exposed strata in Baoshan area are mainly Devonian, carbonitic, Permian and so on. Successively experienced Caledonian movement, Hercynian movement, Indosinian movement, Yanshan movement, Himalayan movement and many other tectonic activities. The magmatic rocks have small exposed area and small rock mass, mainly acid-intermediate acid granodiorphyry, granodiorite porphyry, quartz porphyry and so on in the early Yanshan period. 2. The overall correlation among the elements in the study area is good, and the strongest correlation is between Pb and Ag,. The correlation coefficient between Zn,Bi,Cu and Zn, was 0.8, which was strongly positive correlation. Secondly, the correlation coefficient between Au,W,Sn,Sb,As,Ni,V,Co,Cr,Mn and other elements is between 0.5 and 0.8, which is positive correlation. F, La. the correlation coefficient between mercury and other elements is low or even negative. 3. The characteristics of geochemical anomalies of 19 elements are analyzed, and 38 single element anomalies are delineated on the basis of single element anomalies. A total of 8 comprehensive anomalies are identified, including 1 type A1 anomaly which further expands the prospecting prospect of the deposit (point). It is known that the deposit can well explain two A2 anomalies causing the anomaly, and it is inferred that five B3 anomalies may be found at the ore site. The anomaly is in good agreement with the known ore (bed) points, which provides a great deal of prospecting information for mineral prospecting. Based on the analysis of strata, lithology, structure, magmatic rocks, geophysics, geochemistry and other ore-controlling factors in the area, taking Baoshan lead-zinc-silver polymetallic deposit as a typical deposit, the prospecting model in the area is established, and the prospecting criteria are put forward. The target area of Maiziping-Jinzigang-Indus lead-zinc polymetallic prospecting and the prospecting target area of Wemaocun-Maanling lead-Zinc Polymetallic Mine are delineated, which provides meaningful help for the next work in the area to find lead-Zinc Polymetallic Mine.
【學(xué)位授予單位】：湖南科技大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2015
【分類(lèi)號(hào)】：P632.3

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相關(guān)期刊論文 前1條

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本文編號(hào)：2472218