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首页> 外文期刊>Current Science: A Fortnightly Journal of Research >Characterization of clay minerals in the sediments of Schirmacher Oasis, East Antarctica: their origin and climatological implications
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Characterization of clay minerals in the sediments of Schirmacher Oasis, East Antarctica: their origin and climatological implications

机译：南极东部Schirmacher绿洲沉积物中粘土矿物的特征：其来源和气候学意义

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A total of 16 glacial sediments consisting of loose admixture of sand, silt and clay have been collected from different parts of the Schirmacher Oasis and adjoining areas, viz. main rocky land, inland lakes, ice sheet and coastal area. The clay from the sediments has been separated and studied for mineral identification using different thermal analysis (DTA), thermogravimetric analysis (TGA) and X-ray diffraction (XRD) analysis. The thermograms of all the samples are almost similar, showing minor gain or loss of weight. DTA curves show a small notch around 585 degrees C, i.e. kaolinite. XRD analysis of the samples treated with Ca and K, glycolated, and heated at various temperatures shows well-developed peaks of chlorite, illite, kaolinite, smectite and vermiculite. An attempt has been made to decipher the origin of clay minerals along with their climatological implications.
机译：从席尔马赫绿洲的不同部分及其毗连地区收集了总共16种冰川沉积物，包括沙子，淤泥和粘土的松散混合物。主要多石土地，内陆湖泊，冰原和沿海地区。已分离出沉积物中的粘土，并使用不同的热分析（DTA），热重分析（TGA）和X射线衍射（XRD）分析进行了矿物识别研究。所有样品的热分析图几乎相似，显示出轻微的体重增加或减少。 DTA曲线显示了大约585摄氏度的小缺口，即高岭石。用Ca和K处理，糖化并在各种温度下加热的样品的XRD分析表明，绿泥石，伊利石，高岭石，蒙脱石和ver石的峰非常发达。已经尝试破译粘土矿物的来源及其气候学意义。

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