【摘要】：地球化學(xué)塊體理論從提出至今,雖然它的發(fā)展歷史僅僅有二十多年歷史,但是它在基礎(chǔ)理論研究及礦產(chǎn)勘查方面具有重大的意義。一方面,它從物質(zhì)供應(yīng)量的角度出發(fā)區(qū)別了巨型礦床與一般礦床,使地質(zhì)學(xué)家們的視野得到開闊,奠定了其它地質(zhì)學(xué)科發(fā)展的基礎(chǔ);另一方面,塊體理論在資源量預(yù)測、成礦潛力分析方面的應(yīng)用,有利于縮小找礦靶區(qū),在研究程度較低的研究區(qū)內(nèi)實現(xiàn)找礦突破。研究區(qū)地處保山-鎮(zhèn)康地塊構(gòu)造單元南段,是三江特提斯構(gòu)造帶的重要組成部分,區(qū)內(nèi)各類礦產(chǎn)資源豐富,其中,蘆子園Cu-Pb-Zn-Fe礦多金屬礦床已達(dá)超大型規(guī)模。但由于該區(qū)的礦礦產(chǎn)勘查工作起步最晚,僅有少數(shù)幾個礦床處在普查、詳查階段,具有較大的找礦潛力。故本文以研究區(qū)土壤地球化學(xué)數(shù)據(jù)為基礎(chǔ),運(yùn)用地球化學(xué)塊體的技術(shù)方法,圈定了研究區(qū)的地區(qū)化學(xué)塊體,繪制了塊體圖,通過追蹤元素逐步富集的趨勢,實現(xiàn)對研究區(qū)內(nèi)的成礦預(yù)測;并進(jìn)一步對該區(qū)的成礦元素資源量、潛在資源量進(jìn)行了計算,定量的評估了塊體的成礦潛力。本文首先對數(shù)據(jù)進(jìn)行因子分析,將12種元素分為3種元素組合,結(jié)合研究區(qū)實際情況,確定Pb、Zn為研究區(qū)的成礦元素;然后迭代剔除3倍方差以外的離群點,得到成礦元素Pb、Zn的異常下限,并將塊體分為6個級次,求得每個級次的分級值;再根據(jù)劃分的分級級次,繪制了地球化學(xué)塊體圖和譜系樹,追蹤元素逐步富集的趨勢,對研究區(qū)成礦潛力進(jìn)行定性的預(yù)測;最后,根據(jù)已探明的礦床的資源量,計算了成礦率。對研究程度較低的其他塊體進(jìn)行資源量、潛在資源量的預(yù)測,定量的評估了塊體的成礦潛力,確定了找礦遠(yuǎn)景區(qū)。本論文所做工作,有利于縮小研究區(qū)的找礦靶區(qū),指導(dǎo)研究區(qū)內(nèi)礦床的尋找。
[Abstract]:Geochemical block theory is of great significance in basic theoretical research and mineral exploration, although it has only a history of more than 20 years since it was put forward. On the one hand, it distinguishes giant deposits from general deposits from the point of material supply, which broadens the horizons of geologists and lays the foundation for the development of other geological disciplines; on the other hand, block theory predicts the amount of resources. The application of metallogenic potential analysis is helpful to narrow down the prospecting target area and to realize the ore prospecting breakthrough in the research area where the degree of research is low. The study area is located in the southern section of the structural unit of Baoshan-Zhenkang block. It is an important part of the Sanjiang Tethys tectonic belt and is rich in all kinds of mineral resources. Among them, the Cu-Pb-Zn-Fe ore deposit of Luziyuan has reached a very large scale. However, only a few ore deposits in this area are in the stage of general survey and detailed investigation, which has great prospecting potential because of the late start of mineral exploration work in this area. Therefore, based on the soil geochemical data of the study area, using the technical method of geochemical block, this paper delineates the regional chemical block in the study area, draws the block map, and by tracing the trend of gradual enrichment of elements, The metallogenic potential of the block is evaluated quantitatively by further calculation of the metallogenic element resources and potential resources in the study area. In this paper, the data are first analyzed by factor analysis, 12 elements are divided into 3 kinds of element combinations, and Pb,Zn is determined to be the ore-forming element in the study area, and then the outliers other than 3 times variance are eliminated iteratively. The anomalous lower limit of metallogenic element Pb,Zn is obtained, and the block is divided into 6 stages, and the classification value of each grade is obtained, and the geochemical block map and pedigree tree are drawn according to the classification order, and the trend of element enrichment is traced. The metallogenic potential of the studied area is predicted qualitatively, and finally, the metallogenic rate is calculated according to the resource quantity of the proved ore deposit. The resources and potential resources of other blocks with low degree of study were forecasted, the ore-forming potential of blocks was evaluated quantitatively, and the prospecting prospect was determined. The work done in this paper is helpful to narrow down the ore-prospecting target in the research area and to guide the prospecting of the ore deposit in the research area.
【學(xué)位授予單位】：中國地質(zhì)大學(xué)(北京)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2017
【分類號】：P632

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本文編號：2246921