Assessment of Textural Characteristics and Magnetic Susceptibility to understand the Sedimentation environment of the Chandratal Lake, Spiti Valley, Himachal Pradesh, India
The present study demonstrates characterisation sediments collected from the Chandratal Lake, a high altitude Himalayan glacial lake, with respect to its texture and magnetic susceptibility. The distribution of grain size in the lake sediments provides enormous information about the properties and depositional environment and helps to understand the various processes effecting erosion and deposition. The textural parameters such as- mean, standard deviation, skewness and kutosis have been examined to understand hydrodynamics of the depositional environment. This work is focused to justify the textural behaviour of the Chandratal lake sediments, how energy correlates with grain size distribution and the degree of sedimentation process. Based on C-M pattern, it is revealed that the past deposited sediments were transported through rolling mode and the present surface sediments through suspension of minor importance. The determined magnetic susceptibility of each sample demonstrates the moderate concentration of the magnetic particles present in the sediments. As the melt increases, the erosion and weathering increase. Hence, more concentration of minerals increases and the value of magnetic susceptibility reveals that the lake experiences high energy processes. The observed behaviour of magnetic susceptibility indicates very less impression of magnetism of anthropogenic factor.