本文選題：崇陽坪　切入點：整裝勘查　出處：《中國地質大學(北京)》2015年碩士論文　論文類型：學位論文

【摘要】：崇陽坪地區(qū)位于揚子地塊與華南裂陷槽的過渡地帶江南地塊東南緣,經歷了雪峰、加里東、印支、燕山和喜山等五次大的地殼運動,區(qū)內地層、構造發(fā)育,巖漿活動強烈,為本區(qū)鎢、錫、銅多金屬礦的形成提供了十分有利的區(qū)域地質條件。近年來,為提高找礦成效,進行實施了整裝勘查項目(崇陽坪地區(qū)鎢礦整裝勘查)。本次論文工作,在充分收集前人資料的基礎上,重點對崇陽坪地區(qū)的鎢礦開展了地質調查和樣品分析,對區(qū)內鎢礦找礦取得了以下認識:1、通過本次工作,在工作區(qū)印支期花崗巖內外接觸帶附近均發(fā)現了礦化較好的鎢礦體,礦床規(guī)模從小型-中到大型,充分證明了該區(qū)鎢礦成礦條件有利,也說明湘南地區(qū)鎢礦不僅在燕山期花崗巖內具有形成中-大型礦床的潛力,在印支期花崗巖內同樣具有尋找中-大型鎢礦床的潛力。2、通過研究發(fā)現該區(qū)圍巖蝕變存在一定的分帶性:脈側蝕變水平方向(從脈依次向外)與垂直方向(從上到下)顯示出較一致的變化,即脈→云英巖→硅化→鉀長石化→正�；◢弾r。通過分析,初步認為花崗巖初期為高酸富堿的,隨著溫度、壓力等變化,依次經歷鉀長石化、硅化、云英巖化等蝕變,在這些蝕變過程中,成礦流體逐漸由堿性過渡向酸性環(huán)境,導致含鎢絡合物分解,最終沉淀成礦。3、通過本次工作,發(fā)現該區(qū)鎢礦化類型眾多,分別有石英大脈型黑鎢、白鎢礦、石英細脈帶型白鎢礦、矽卡巖化角巖型白鎢礦、矽卡巖型白鎢礦、蝕變花崗巖型白鎢礦、云英巖型白鎢礦、花崗偉晶巖型白鎢礦等,其中石英細脈帶型白鎢礦為區(qū)內最主要的礦床類型。通過對比分析,認為中華山巖體內,栗山坡鎢礦和沙溪鎢礦深部和外圍具尋找石英細脈帶型白鎢礦和矽卡巖化角巖型白鎢礦的潛力,崇陽坪和瓦屋塘巖體具有尋找石英細脈帶型白鎢礦的潛力。分析認為三個巖體中以中華山和崇陽坪巖體及外圍找礦潛力較大,應作為下一步整裝勘查區(qū)的重點主攻方向。4、在了解崇陽坪地區(qū)鎢礦床成礦地質背景和礦床地質特征的基礎上,通過對崇陽坪地區(qū)鎢礦成礦地質條件及成礦作用的分析,對比不同巖體各個礦床特點,結合研究區(qū)不同礦化類型及礦化富集規(guī)律,初步建立了找礦模型,為下步找礦評價、成礦預測及勘查工作提供方向及依據,并認為本區(qū)具備形成中、大型鎢礦的條件,外圍及深部還具較大找礦潛力。
[Abstract]:The Chongyangping area is located in the southeastern margin of the Jiangnan block in the transitional zone between the Yangtze block and the South China rift trough. It has undergone five major crustal movements, such as Xuefeng, Caledonian, Indosinian, Yanshanian and Himalayan, with stratigraphic, structural development and strong magmatic activity in the area. It provides a favorable regional geological condition for the formation of tungsten, tin and copper polymetallic deposits in this area. In recent years, in order to improve the prospecting effect, the project of integrated exploration has been carried out. Based on the full collection of previous data, the geological investigation and sample analysis of tungsten deposits in Chongyangping area have been carried out, and the following understanding of tungsten ore prospecting in this area has been obtained, and through this work, The mineralized tungsten ore bodies were found in the vicinity of the Indosinian granite contact zone in the working area. The scale of the deposits ranges from small to medium to large, which fully proves that the metallogenic conditions of tungsten deposits in this area are favorable. It also shows that tungsten deposits in southern Hunan have the potential to form meso-large-scale deposits not only in Yanshanian granites, but also in Yanshanian granites. The Indosinian granites also have the potential to look for medium-large tungsten deposits. Through the study, it is found that there is a certain zonation of the wall rock alteration in this area: the horizontal direction of vein side alteration (from the vein to the outward direction) and the vertical direction (from the top up). To the bottom) showing a more consistent change, Namely pulse. 鈫扱uartz rock. 鈫扴ilicification. 鈫扨otassium petrifaction. 鈫扤ormal granite. Through analysis, it is preliminarily considered that the initial stage of the granite is acid-rich and alkali-rich, and with the change of temperature and pressure, it goes through the alteration of potassium feldspar, silicification, and quartz in turn, in the process of these alteration, The ore-forming fluid gradually transitioned from alkaline to acidic environment, resulting in the decomposition of tungsten complex, and finally precipitated mineralization .3.Through this work, it was found that there are many types of tungsten mineralization in this area, which are quartz large-vein black tungsten and scheelite, respectively. Quartz vein-belt type scheelite, skarn hornstone type scheelite, skarn type scheelite, altered granite type scheelite, dolomite type scheelite, granitic pegmatite type wolframite, etc., The quartz veinlet type scheelite deposit is the most important deposit type in this area. The deep and outer parts of the Li-shan and Shaxi tungsten deposits have the potential to look for quartz vein-belt type scheelite and skarn hornstone scheelite. The Chongyangping and Wawutang pluton bodies have the potential to search for quartz vein-type scheelite deposits. It is considered that the Zhonghua Mountain and Chongyangping intrusions and their periphery have great prospecting potential. It should be regarded as the next major direction of attack in the integrated exploration area. On the basis of understanding the metallogenic geological background and geological characteristics of tungsten deposits in Chongyangping area, the metallogenic geological conditions and metallogenic processes of tungsten deposits in Chongyangping area are analyzed. By comparing the characteristics of various ore deposits in different rock masses, combining with different mineralization types and mineralization enrichment laws in the study area, a preliminary prospecting model is established, which provides the direction and basis for the next prospecting evaluation, metallogenic prediction and exploration work. It is considered that this area has the conditions for forming medium and large tungsten deposits and the potential for prospecting in the periphery and in the deep.
【學位授予單位】：中國地質大學(北京)
【學位級別】：碩士
【學位授予年份】：2015
【分類號】：P618.67

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