【摘要】：高嶺石族礦物是最為常見的粘土礦物類型之一,工業(yè)應(yīng)用廣泛。埃洛石由于具有獨特的空心管狀結(jié)構(gòu)和高生物相容性,使其在化學(xué)工業(yè)、醫(yī)藥等領(lǐng)域有著極大的應(yīng)用價值。然而埃洛石不僅地質(zhì)儲量較低,而且常含高嶺石、石英、長石、云母、鐵氧化物等伴生雜質(zhì)礦物,提純分離難度大,限制了其大范圍應(yīng)用。本文通過X射線衍射光譜、傅立葉紅外吸收光譜、場發(fā)射掃描電子顯微鏡和透射電子顯微鏡等手段對比研究了蘇州和馬鞍山熱液成因高嶺土、江西景德鎮(zhèn)花崗巖風(fēng)化高嶺土和內(nèi)蒙古忙農(nóng)村沉積成因高嶺土的礦物組成和高嶺石族礦物形成的現(xiàn)象。結(jié)果表明:熱液成因和風(fēng)化淋濾成因高嶺土中都觀察到了大量埃洛石,存在鈉長石→埃洛石、鉀長石→高嶺石、白云母→埃洛石反應(yīng)序列;而沉積成因高嶺土中未觀察到。重點觀察了江西景德鎮(zhèn)風(fēng)化花崗巖中白云母的埃洛石化,發(fā)現(xiàn)白云母風(fēng)化所形成的埃洛石在形態(tài)和空間分布上分為兩大類,一類主要分布在白云母顆粒的邊緣和(001)表面,具有很好的定向性,形貌為細(xì)長管狀,另一類主要分布在白云母片的邊緣,分布不規(guī)則,形態(tài)短小�；谏鲜鲇^察,本文提出了白云母風(fēng)化形成埃洛石的兩種可能機(jī)制,即溶解-結(jié)晶模式和淋濾層原位重構(gòu)模式。在地質(zhì)樣品觀察的基礎(chǔ)上,本研究設(shè)計并開展了白云母埃洛石化模擬實驗,觀察到了白云母溶解的現(xiàn)象,且部分片層發(fā)生了卷曲呈瓦片狀,趨近于管狀,顯示了淋濾層原位重構(gòu)模式的埃洛石化現(xiàn)象。
[Abstract]:Kaolinite group minerals are one of the most common clay minerals and are widely used in industry. Because of its unique hollow tubular structure and high biocompatibility, Ellowstone has great application value in chemical industry, medicine and other fields. However, Erluoite not only has low geological reserves, but also contains associated minerals such as kaolinite, quartz, feldspar, mica, iron oxide, etc. It is difficult to purify and separate, which limits its wide application. A comparative study of hydrothermal kaolin from Suzhou and Maanshan has been carried out by means of X-ray diffraction, Fourier infrared absorption spectroscopy, field emission scanning electron microscope and transmission electron microscope. Mineral composition and formation of kaolinite of granite weathering in Jingdezhen, Jiangxi Province, and sedimentary kaolin in busy countryside of Inner Mongolia. The results show that a large number of albite, potassium feldspar, Muscovite and Muscovite are observed in hydrothermal and weathering kaolinite, but not in sedimentary kaolinite. The Eluotization of Muscovite in the weathered granite of Jingdezhen, Jiangxi Province was observed. It was found that the Erluo stone formed by the weathering of Muscovite can be divided into two categories in morphology and spatial distribution, one is mainly distributed on the edge of Muscovite particles and the other is on (001) surface. It has a good orientation, and the shape is slender and tubular. The other kind is mainly distributed on the edge of the Muscovite film. The distribution is irregular and the shape is short. Based on the above observations, two possible mechanisms for weathering of Muscovite to form Elosterite are proposed, that is, dissolution-crystallization model and in-situ reconstruction model of leaching layer. Based on the observation of geological samples, the simulation experiment of Muscovite Erluo Petrochemical was designed and carried out. The phenomenon of Muscovite dissolution was observed. The phenomenon of Ellow fossilization in the mode of in-situ reconstruction of leaching layer is shown.
【學(xué)位授予單位】：南京大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2017
【分類號】：P578.964

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