Monsoon induced cobalt enrichment in Porites (coral) from the Arabian Sea
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Cobalt concentrations in growth bands of a reef building coral (Porites sp.) collected from Kalpeni Atoll of the Lakshadweep group of islands (Arabian Sea), rvealed that cobalt concentrations and Co/Ca ratios exhibit similar trend. Study indicates that most of the cobalt is located in non-lattice phases. Positive relations were found among cobalt concentrations, Co/Ca ratios and rainfall in the monsoonal bands. Cobalt concentrations are in tune with the intensity of land run-off which is the main source of cobalt to surface seawater. Results suggest that cobalt could be a potential proxy for paleomonsoons.
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