纳米级高岭石晶胞数、原子数和晶面原子数的计算与研究   总被引：7，自引：2，他引：7       下载免费PDF全文

韩炜  陈敬中 《岩石矿物学杂志》2003,22(3):293-296

以矿物晶体结构、晶体化学理论为基础，通过对纳米级高岭石颗粒的晶胞数、原子数以及平行(001)面的表面原子数的计算，讨论了它们与纳米级高岭石颗粒尺度大小的相关规律，并结合纳米微粒的特性对其进行了简要分析。  相似文献   

高岭石形成赛隆过程相变初探   总被引：5，自引：0，他引：5  

邱克辉  张其春 《矿物学报》1996,16(1):72-76

本文对比了高岭石热分解及经碳热还原氮化作用制备赛隆过程中的相变情况，我们发现高岭石在这两种过程中发生的相变并不尽相同，加热高岭石最终形成莫来石和方石英过程中的相变，在其经碳热还原氮化作用制备赛隆的过程中是否出现，取决于温度、时间、Ｃ／Ｓｉ原子比、Ｎ２流量等实验条件，后者因受众多实验因素的影响，其相变过程远较前者复杂。因此，笔者认为这两种过程中相变是相同的观点有进一步探讨的必要。  相似文献   

煤系高岭石有机夹层作用的实验研究   总被引：4，自引：0，他引：4  

刘钦甫  丁述理  宋丽君  朱在兴 《岩石矿物学杂志》1996,15(2):153-157

本文利用ＸＲＤ和ＩＲ研究了丙烯酰胺和脂肪酸盐与煤系高岭石的夹层作用及稳定性。通过极性有机化合物作夹带剂，成功地合成了高岭石－丙烯酰胺、高岭石－脂肪酸盐有机复合体。夹层作用完成后，层面间距从７．１８Ａ分别扩大到１１．２２Ａ和１１．３２Ａ。有机化合物能在高岭石层间形成稳定的夹层主要与夹层分子和高岭石内表面羟基形成氢键有关。  相似文献   

高岭石有机插层复合物的研究现状及发展趋势   总被引：1，自引：0，他引：1  

赵彦巧  王万军  张进宇 《四川地质学报》2008,28(3):243-247

综述了高岭石-有机物插层复合物发展历程,分析了高岭石插层复合物制备方法、插层反应影响因素及插层应用,并阐述了有机插层复合物的研究重点及发展趋势。  相似文献   

河曲-保德矿区煤系高岭岩矿床特征与利用方向     

黄岑丽  袁文峰 《中国煤炭地质》2008,20(5):20-23

河曲-保德矿区含煤地层中高岭岩资源丰富,分别赋存于太原组顶部和山西组中部,其类型以隐晶质高岭岩为主,少量为细-粗晶质及烧变高岭岩。根据大量样品试测结果,其SiO2／Al2O3摩尔比值在2．0左右,说明本区高岭岩纯度高。分析其成因属沉积型煤系高岭岩矿床,其成矿母质类型有两种,一是陆地搬运高岭岩母质多为粘土矿物,运移至静水沼泽环境中沉积,在有机质酸的作用下形成较纯的高岭岩层;二是成矿母质为火山碎屑物质,在酸性沼泽环境下经成岩作用形成,区内高岭岩质地优良,具有广泛的利用前景,为发展煤矿循环经济提供了依据。  相似文献   

Spatial distribution of altered minerals in the Gadag Schist Belt (GSB) of Karnataka,Southern India using hyperspectral remote sensing data     

Nisha Rani  Tejpal Singh 《国际地球制图》2017,32(3):225-237

Spatial distribution of altered minerals in rocks and soils in the Gadag Schist Belt (GSB) is carried out using Hyperion data of March 2013. The entire spectral range is processed with emphasis on VNIR (0.4–1.0 μm) and SWIR regions (2.0–2.4 μm). Processing methodology includes Fast Line-of-sight Atmospheric Analysis of Spectral Hypercubes correction, minimum noise fraction transformation, spectral feature fitting (SFF) and spectral angle mapper (SAM) in conjunction with spectra collected, using an analytical spectral device spectroradiometer. A total of 155 bands were analysed to identify and map the major altered minerals by studying the absorption bands between the 0.4–1.0-μm and 2.0–2.3-μm wavelength regions. The most important and diagnostic spectral absorption features occur at 0.6–0.7 μm, 0.86 and at 0.9 μm in the VNIR region due to charge transfer of crystal field effect in the transition elements, whereas absorption near 2.1, 2.2, 2.25 and 2.33 μm in the SWIR region is related to the bending and stretching of the bonds in hydrous minerals (Al-OH, Fe-OH and Mg-OH), particularly in clay minerals. SAM and SFF techniques are implemented to identify the minerals present. A score of 0.33–1 was assigned for both SAM and SFF, where a value of 1 indicates the exact mineral type. However, endmember spectra were compared with United States Geological Survey and John Hopkins University spectral libraries for minerals and soils. Five minerals, i.e. kaolinite-5, kaolinite-2, muscovite, haematite, kaosmec and one soil, i.e. greyish brown loam have been identified. Greyish brown loam and kaosmec have been mapped as the major weathering/altered products present in soils and rocks of the GSB. This was followed by haematite and kaolinite. The SAM classifier was then applied on a Hyperion image to produce a mineral map. The dominant lithology of the area included greywacke, argillite and granite gneiss.  相似文献   

华北晚古生代煤系高岭岩微量元素和稀土元素地球化学研究   总被引：19，自引：4，他引：15  

刘钦甫  丁述理 《地球化学》1998,27(2):196-203

通过华北晚古生代煤系高岭岩微量元素和稀土元素研究,以及利用Ｔｉ／Ａｌ、Ｃｒ／Ａｌ、Ｚｒ／Ａｌ、Ｎｉ／Ａｌ和Ｚｒ／Ｈｆ比值,探讨了研究区煤系高岭岩形成时的地质条件和成岩物质来源。  相似文献   

The dynamics of turbulent, transitional and laminar clay-laden flow over a fixed current ripple   总被引：1，自引：0，他引：1  

JACO H. BAAS  JAMES L. BEST 《Sedimentology》2008,55(3):635-666

Most aqueous sedimentary environments contain varying concentrations of fine‐grained, often clay‐rich, sediment that is transported in suspension and may modify the properties of the flow and underlying mobile bed. This paper presents results from a series of laboratory experiments examining the mean and turbulent properties of clay‐laden (kaolinite) flows, of various volumetric sediment concentrations between 0·046% and 12·7%, moving over a fixed, idealized current ripple. As the kaolinite concentration was raised, with flow velocity and depth constant, four flow types were observed to occur: (i) turbulent flow, in which flow separation is dominant in the leeside of the ripple; (ii) turbulence‐enhanced transitional flow, in which turbulence in the leeside separation zone region is enhanced; (iii) turbulence‐attenuated transitional flow, in which turbulence along the separation zone shear layer and in the free flow above it becomes damped, eventually leading to a reduction in the size of the separation zone wake region; and (iv) laminar plug flow, in which turbulence is damped and flow is almost stagnant in the lee of the ripple. Such modulation of turbulence by increasing clay concentrations suggests that many paradigms of flow and bedform dynamics, which have been based on extensive past work in clear water flows, require revision. The present results highlight a need to fully characterize the boundary conditions for turbulence modulation as a function of clay type and applied flow conditions, and the effects of such flows on fully mobile cohesionless beds.  相似文献   

“Water Consumption” in the Diagenetic Stage and Its Petroleum Geological Significance     

ZHANG Shanwen 《《地质学报》英文版》2008,82(3):663-668

Inspired from the anomaly of low pressure in the middle and deep reservoir of the Paleogene in the Jiyang depression, this paper theoritically discusses＂waterconsumption＂of the principal mineral alteration during the diagenetic stage. The preliminary research result shows that ＂water consumption＂ of mineral alteration in the diagenetic stage can make formation water greatly decrease. Relevant formations will be in the stage of low pressure without supply of exterior liquid. Pressure differences between the relevant formations and wall rocks make hydrocarbons enter easily to form the effective reservoir.  相似文献   

天然烧变高岭石中水铝英石的发现   总被引：1，自引：0，他引：1  

何宏平  郭九皋  张惠芬  王辅亚  胡澄 《矿物学报》1995,15(4):367-371

作者用DTA、TG、XRD、29Si和27AlMASNMR等手段对我国北方的一些天然烧变高岭石及其热处理产物进行了研究．首次在天然烧变高岭石的29Si魔角旋转核磁共振谱中（MASNMR）记录到了-79．0×10－6位置附近的水铝英石的特征29Si信号，说明在一定的自然条件下，经过水的化学作用，变高岭石可以转变成水铝英石。但是，水铝英石是一种非晶质相物质，它不稳定，易脱失结构水而转变成其它物相，这些发现对完善高岭石的相变理论具有重要的科学意义  相似文献