本文選題：羅河鐵礦床 + 綠泥石��； 參考：《合肥工業(yè)大學(xué)》2017年碩士論文

【摘要】：羅河鐵礦床位于長江中下游成礦帶內(nèi)廬樅礦集區(qū)的西北部,是成礦帶內(nèi)資源量最大的鐵礦床,其發(fā)現(xiàn)于上世紀(jì)七十年代,前人研究成果認(rèn)為其屬于玢巖型鐵礦床。2013年,羅河礦床的深部又發(fā)現(xiàn)了厚大鐵礦體,也稱之為小包莊鐵礦床。這是近年來在長江中下游成礦帶內(nèi)找礦的重大突破之一,具有重要的理論研究意義和勘探應(yīng)用價值。本文在前人對羅河鐵礦床地質(zhì)特征、礦化蝕變分帶特征研究基礎(chǔ)上,以礦床中廣泛發(fā)育的特征蝕變礦物綠泥石和綠簾石為研究對象,系統(tǒng)的采集了礦床-545m中段不同位置和四個鉆孔-870-1850m不同深度的綠泥石和綠簾石樣品。在詳細(xì)的鏡下鑒定和電子探針分析工作的基礎(chǔ)上,開展了系統(tǒng)的LA-ICP-MS礦物原位分析實驗,查明綠泥石和綠簾石中微量元素特征,分析不同微量元素之間的相關(guān)關(guān)系,得出了以下認(rèn)識。綠泥石和綠簾石微量元素特征表明:(1)羅河礦床-545m中段不同位置的綠泥石和鉆孔不同深度的綠泥石,均具有Fe與Na、Si、K呈負(fù)相關(guān),而與Mg呈正相關(guān)的特征;(2)-545m中段綠泥石中Fe、Ti、Na、Zn、Ca元素的含量遠(yuǎn)高于鉆孔中的綠泥石,含量變化范圍也更廣,而Si、Mg、Mn、K、Li元素含量則無明顯差別。同時在同一鉆孔中,較深處綠泥石的Fe、Mn、Cr、As、Zr、Sb、Hf、Th、U等元素含量要低于較淺處的綠泥石,而Ni、B、Mg、Ti、Co、Ni等元素則相反;(3)羅河鐵礦床的綠簾石中Y vs Cr,Sr vs Mn,Y vs V,Co vs Ni,Ti vs As,Ti vs V元素之間都有著良好的正相關(guān)性。此外,國外諸多學(xué)者總結(jié)了斑巖型礦床的找礦勘探模型,利用綠泥石和綠簾石的微量元素含量可以計算出與礦化中心和成礦巖體的距離,并取得了良好的效果。本次工作在此基礎(chǔ)上,對羅河鐵礦床中的綠泥石和綠簾石進(jìn)行了同樣的研究,對比斑巖型礦床中綠泥石和綠簾石微量元素確定成礦中心位置的方法,估算了羅河鐵礦床的礦化中心和隱伏巖體的位置。數(shù)據(jù)結(jié)果表明通過玢巖礦床中綠泥石和綠簾石微量元素特征估算礦化中心也是可行的,而推算出的成礦巖體的位置也與當(dāng)前地質(zhì)事實較為符合,具有一定的可信度。
[Abstract]:The Luohe iron deposit, located in the northwest of the inner Lu-abong ore concentration area of the middle and lower reaches of the Yangtze River, is the most abundant iron ore deposit in the metallogenic belt. It was discovered in the 1970s, and the previous research results considered it to belong to the porphyrite iron ore deposit. A thick iron ore body was found in the deep part of Luohe deposit, also known as Xiaobuzhuang iron deposit. This is one of the major breakthroughs in prospecting in the metallogenic belt of the middle and lower reaches of the Yangtze River in recent years and has important theoretical research significance and exploration and application value. Based on the study of geological characteristics and mineralization alteration zoning characteristics of Luohe iron deposit, this paper takes the widely developed alteration minerals chlorite and verdite as the objects of study. The samples of chlorite and verdite from different positions and four boreholes of -870-1850m in the middle segment of -545m ore deposit were systematically collected. On the basis of detailed microscopic identification and electron probe analysis, systematic in situ LA-ICP-MS mineral analysis experiments were carried out to find out the characteristics of trace elements in chlorite and verdite, and to analyze the correlation between different trace elements. The following conclusions are drawn. The trace element characteristics of chlorite and verdite indicate that there is a negative correlation between Fe and Na Si Si K in different positions of chlorite and chlorite at different depths of borehole in the middle segment of the Luohe River deposit at 545m. However, the content of Fe ~ (2 +) Ti-Na ~ (2 +) Zn ~ (+) Ca in chlorite is much higher than that in borehole, and the range of variation is wider, but there is no significant difference in the content of Si-Mg ~ (2 +) mn ~ (+) K ~ (+) Li in the middle segment of chlorite with positive correlation with mg. At the same time, in the same drilling hole, the content of Fe, mn, Cr, Cr, SbHfU and Thu in the deeper chlorite is lower than that in the shallower chlorite. On the other hand, there is a good positive correlation between Y vs Cr-Sr vs Mn-Y vs V + Co vs Ni + Ti vs As-Ti vs V elements in the green curtain of the Luo River iron ore deposit. In addition, many foreign scholars have summarized the prospecting and exploration models of porphyry deposits. The distance from mineralization center and ore-forming rock can be calculated by using trace element content of chlorite and verdite, and good results have been obtained. On the basis of this work, the chlorite and verdite in Luohe iron deposit were studied in the same way, and the methods of determining the metallogenic center of chlorite and verdite in porphyry deposit were compared. The location of mineralization center and concealed rock mass of Luohe iron deposit is estimated. The data show that it is feasible to estimate the mineralization center by the trace element characteristics of chlorite and verdite in porphyrite deposit, and the calculated location of ore-forming rock body is consistent with the present geological facts and has certain credibility.
【學(xué)位授予單位】：合肥工業(yè)大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2017
【分類號】：P618.31;P595

【參考文獻(xiàn)】

相關(guān)期刊論文 前10條

1 劉一男;范裕;高昌生;張千明;張樂駿;;長江中下游成礦帶廬樅盆地小包莊鐵礦床地質(zhì)特征研究[J];巖石學(xué)報;2016年02期

2 王小雨;毛景文;程彥博;張興康;劉鵬;劉石華;方思;;粵東新寮崠銅多金屬礦床綠泥石特征及其地質(zhì)意義[J];巖石礦物學(xué)雜志;2014年05期

3 范裕;劉一男;周濤發(fā);張樂駿;袁峰;王文財;;安徽廬樅盆地泥河鐵礦床年代學(xué)研究及其意義[J];巖石學(xué)報;2014年05期

4 王世偉;周濤發(fā);袁峰;范裕;俞滄海;葛嶺虹;石誠;池月余;;安徽沙溪斑巖型銅金礦床成巖序列及成巖成礦年代學(xué)研究[J];巖石學(xué)報;2014年04期

5 梁婉娟;杜澤忠;甄世軍;張志輝;李永勝;甄世民;;甘肅白銀廠礦床綠泥石特征及其成礦意義[J];礦物學(xué)報;2013年S2期

6 袁峰;周濤發(fā);王世偉;范裕;湯誠;張千明;俞滄海;石誠;;安徽廬樅沙溪斑巖銅礦蝕變及礦化特征研究[J];巖石學(xué)報;2012年10期

7 周濤發(fā);王彪;范裕;袁峰;張樂駿;鐘國雄;;廬樅盆地與A型花崗巖有關(guān)的磁鐵礦-陽起石-磷灰石礦床——以馬口鐵礦床為例[J];巖石學(xué)報;2012年10期

8 吳禮彬;陳芳;柳丙全;杜建國;許衛(wèi);楊道X;;安徽省廬江縣羅河式鐵礦床地質(zhì)特征與成礦模式[J];合肥工業(yè)大學(xué)學(xué)報(自然科學(xué)版);2011年06期

9 周濤發(fā);范裕;袁峰;張樂駿;馬良;錢兵;謝杰;;長江中下游成礦帶火山巖盆地的成巖成礦作用[J];地質(zhì)學(xué)報;2011年05期

10 范裕;周濤發(fā);袁峰;唐敏惠;張樂駿;馬良;謝杰;;廬樅盆地高硫化型淺成低溫?zé)嵋撼傻V系統(tǒng):來自礬山明礬石礦床地質(zhì)特征和硫同位素地球化學(xué)的證據(jù)[J];巖石學(xué)報;2010年12期

，

本文編號：1898925