Characterization Of Clay Samples Separated From Subsurface Alluvial Soils Of Tinsukia And Jorhat Districts, Assam, India

It has been observed from chemical analysis of the clay samples separated from sub-surface alluvial soils of Tinsukia and Jorhat districts of Assam that the percentage of major constituents like silica, alumina and iron were in the range of 40.50-53.03, 23.41-32.34 and 4.62-14.24 respectively. X-ray diffraction pattern of the clay samples confirmed the presence of different minerals along with the impurities. The major minerals found are kaolinite, halloysite and mixed kaolinite-halloysite minerals. The impurities found in the clay samples are quartz, calcite, goethite, siderite, hematite and pyrite.