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Mineral magnetic characteristics of the late Quaternary coastal red sands of Bheemuni, East Coast (India)

Research paper by Priyeshu Srivastava, S.J. Sangode, Nikita Parmar, D.C. Meshram, Priyanka Jadhav, A.K. Singhvi

Indexed on: 07 Oct '16Published on: 26 Aug '16Published in: Journal of Applied Geophysics



Abstract

The voluminous red sand deposits of Bheemuni in the east coast of India provide record of coastal land-sea interaction during the late Quaternary climatic and eustatic oscillations. Limited information on the origin and depositional environments of these red sands and their chronology is available. We studied two inland to coast cross profiles from Bheemuni red sand deposits using mineral magnetism, color characteristics and Citrate-bicarbonate-dithionite (CBD) extractable pedogenic iron oxides over 23 horizons along with optically stimulated luminescence (OSL) chronology at 6 horizons. The oldest exposed bed had an optical age of ~ 48.9 ± 1.7 ka. Differential ages between the two parallel sections (SOS = ~ 48.9 ± 1.7 to 12.1 ± 0.3 ka and IMD = ~ 29.3 ± 3.5 ka) suggest laterally shifting fluvial sedimentation.

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