Karewa_magnetic_dataset

Description

This dataset deals about Understanding the provenance and depositional processes of Plio-Pleistocene Karewa group sediments exposed in Kashmir valley with the help of mineral magnetism technique. We performed a magnetic mineral analysis on the sediments from the Karewa palaeolake to better understand the provenance and depositional processes within the basin. The Karewa basin is bordered by the Himalayan range to the north and northeast, and the Pir Panjal range to the south and southwest. Sediments from the Dubjan and Pampore members were selected to investigate the characteristics of magnetic mineral concentration, grain size, and mineralogy. The presence of highly variable magnetic grain sizes and a combination of minerals such as magnetite, maghemite, and hematite in the Dubjan sediments suggests that both the Greater Himalayan and Panjal ranges contributed to the sedimentation. In contrast, the dominance of finer magnetite in the Pampore sediments indicates that the main source of sediment influx was the Panjal ranges. The magnetic minerals in the basin have experienced three distinct depositional processes: 1) pre-deposition Catchment-Derived Oxidation, 2) post-deposition Low-Temperature Oxidation, and 3) authigenic Catchment-Derived Erosion. The Dubjan sediments, deposited farther from the Himalayan source and closer to the Panjal range, show evidence of all three processes. Meanwhile, the Pampore sediments, which were deposited more centrally with a significant sediment contribution from the Panjal range, only display signatures of Low-Temperature Oxidation and Catchment-Derived Erosion. These findings suggest that the deposition of sediments in the Karewa basin was influenced by different transportation routes and sediment sources, ultimately governed by tectonic activity.

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