风化成因埃洛石形成机制的初步研究
发布时间：2018-08-18 15:22
【摘要】：高岭石族矿物是最为常见的粘土矿物类型之一,工业应用广泛。埃洛石由于具有独特的空心管状结构和高生物相容性,使其在化学工业、医药等领域有着极大的应用价值。然而埃洛石不仅地质储量较低,而且常含高岭石、石英、长石、云母、铁氧化物等伴生杂质矿物,提纯分离难度大,限制了其大范围应用。本文通过X射线衍射光谱、傅立叶红外吸收光谱、场发射扫描电子显微镜和透射电子显微镜等手段对比研究了苏州和马鞍山热液成因高岭土、江西景德镇花岗岩风化高岭土和内蒙古忙农村沉积成因高岭土的矿物组成和高岭石族矿物形成的现象。结果表明:热液成因和风化淋滤成因高岭土中都观察到了大量埃洛石,存在钠长石→埃洛石、钾长石→高岭石、白云母→埃洛石反应序列;而沉积成因高岭土中未观察到。重点观察了江西景德镇风化花岗岩中白云母的埃洛石化,发现白云母风化所形成的埃洛石在形态和空间分布上分为两大类,一类主要分布在白云母颗粒的边缘和(001)表面,具有很好的定向性,形貌为细长管状,另一类主要分布在白云母片的边缘,分布不规则,形态短小。基于上述观察,本文提出了白云母风化形成埃洛石的两种可能机制,即溶解-结晶模式和淋滤层原位重构模式。在地质样品观察的基础上,本研究设计并开展了白云母埃洛石化模拟实验,观察到了白云母溶解的现象,且部分片层发生了卷曲呈瓦片状,趋近于管状,显示了淋滤层原位重构模式的埃洛石化现象。
[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.
【学位授予单位】：南京大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：P578.964
本文编号：2189880
[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.
【学位授予单位】：南京大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：P578.964
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