本文選題：成因礦物學(xué)　切入點(diǎn)：礦物標(biāo)型　出處：《中國(guó)地質(zhì)大學(xué)(北京)》2015年碩士論文

【摘要】：華北地臺(tái)北緣是我國(guó)重要的金礦床(點(diǎn))聚集區(qū),成礦地質(zhì)條件非常優(yōu)越,是進(jìn)行金礦勘探的理想?yún)^(qū)塊。哈達(dá)門溝-柳壩溝金礦床位于位華北地臺(tái)北緣,是一類與鉀長(zhǎng)石化關(guān)系密切的超大型金礦床。本文在綜合研究前人研究成果的基礎(chǔ)上,從成因礦物學(xué)與找礦礦物學(xué)角度,對(duì)與成礦關(guān)系密切的黃鐵礦、石英、鉀長(zhǎng)石礦物進(jìn)行研究,并通過(guò)哈達(dá)門溝-柳壩溝金礦床對(duì)比研究成果,為礦區(qū)深部預(yù)測(cè)提供有用的信息。研究區(qū)黃鐵礦均為N型導(dǎo)電類型,柳壩溝黃鐵礦形成溫度主要集中于260oC~360oC,哈達(dá)門溝礦區(qū)形成溫度主要集中于205 oC~289oC。晶胞參數(shù)ao介于0.54167~0.54252nm之間,略大于理論值,與高程呈負(fù)相關(guān)。黃鐵礦以強(qiáng)烈富集Mo、Pb元素,強(qiáng)烈虧損Cr、Rb、Nb等元素為主要特征。(Co+Ni)/As比值較大、As含量極低是該礦床的典型標(biāo)型特征。石英晶胞參數(shù)與高程呈一定的正相關(guān)關(guān)系。微量元素以強(qiáng)烈富集Mo、As、Ba、Pb,相對(duì)富集Sr為特征。鉀長(zhǎng)石微量元素以Ba、Pb的強(qiáng)烈富集和Cr、Ni、Zr、Nb、Hf、Ta元素的強(qiáng)烈虧損為主要特征。黃鐵礦虧損Nb、Ta、Zr、Hf等高場(chǎng)強(qiáng)元素,相對(duì)富集LREE,Hf/Sm、Nb/La和Th/La值均小于1,說(shuō)明成礦流體是富Cl的流體。成礦階段黃鐵礦、石英、鉀長(zhǎng)石稀土元素具明顯的銪正異常,表明成礦流體是一種中高溫強(qiáng)還原性流體。綜合黃鐵礦熱電性、晶胞參數(shù)和石英晶胞參數(shù)研究成果,認(rèn)為柳壩溝礦區(qū)較哈達(dá)門溝礦區(qū)剝蝕程度小,深部有很大的找礦潛力。313號(hào)脈東段是下一步找礦工作的重點(diǎn)區(qū)域。哈達(dá)門溝礦區(qū)28、62號(hào)脈相對(duì)礦區(qū)內(nèi)其他脈體剝蝕程度較小,具有較好的找礦潛力。
[Abstract]:The Taibei margin of North China is an important gold deposit (spot) accumulation area in China with excellent metallogenic geological conditions and is an ideal area for gold exploration.The Hadamengou-Liubagou gold deposit, which is located on the Taipei margin of the North China platform, is a kind of super large gold deposit closely related to the potash petrifaction.In this paper, based on the comprehensive study of the previous research results and from the perspective of genetic mineralogy and prospecting mineralogy, the pyrite, quartz and potash feldspar minerals, which are closely related to metallogenesis, are studied in this paper.The results of comparative study on the Hadamengou-Liubagou gold deposit provide useful information for the deep prediction of the ore area.The pyrite in the study area is of N-type conductive type. The formation temperature of Liubagou pyrite is mainly concentrated at 260oCn360oC, and the formation temperature of Hadamenggou mine is 205oC ~ (289oC).The unit cell parameter ao is between 0.54167~0.54252nm, slightly larger than the theoretical value, and negatively correlated with height.Pyrite is characterized by strong enrichment of Mo-Pb elements and strong depletion of Cr-RbNb, etc. The typical typomorphic characteristics of the deposit are the high ratio of Ni)/As and the extremely low content of as.There is a positive correlation between quartz cell parameters and height.The trace elements are characterized by strong enrichment of Mo-As-BaPb and relative enrichment of Sr.The main characteristics of the potassium feldspar trace elements are the strong enrichment of Bahl Pb and the strong depletion of the elements such as Cr, Ni, Zr, NB, HfU, Ta.Pyrite is depleted in high field strength elements such as TaZrZrHf, and is relatively enriched in LREEN HF / SmNb / La and Th/La values less than 1, indicating that the ore-forming fluid is a Cl-rich fluid.In the metallogenic stage, the rare earth elements of pyrite, quartz and potassium feldspar have obvious europium positive anomalies, indicating that the ore-forming fluid is a medium and high temperature strongly reductive fluid.Based on the research results of pyrite thermoelectric properties, unit cell parameters and quartz cell parameters, it is considered that the denudation degree of Liubagou mining area is smaller than that of Hadamenggou mining area, and the east section of No. 313 vein in the deep part is the key area of the next prospecting work.Compared with other veins in Hadamenggou mining area, No. 28C62 vein has a relatively small denudation degree and has better prospecting potential.
【學(xué)位授予單位】：中國(guó)地質(zhì)大學(xué)(北京)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2015
【分類號(hào)】：P618.51

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