Distribution, provenance and early diagenesis of major and trace metals in sediment cores from the Mandovi estuary, western India
作者： A. Prajith , V. Purnachandra Rao , P. Chakraborty
DOI: 10.1016/J.ECSS.2016.01.014
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摘要: Major elements and trace metals were analyzed in four sediment cores recovered along a transect the Mandovi estuary for their distribution, provenance early diagenesis. The sediments clayey silts from upper/lower sand-dominated middle estuary/bay. Organic carbon (OC) content varied 0.5 to 4%, with higher values fine-grained sediments. mean Fe Mn contents of upper/middle 3–5 times 8–13 times, respectively than reference (RS) same estuary. lower estuary/bay close RS. Strong inter-metal correlation among Ti, V, Cr Zr all indicated contribution common source, probably laterites hinterland. Trace more enriched Early diagenetic control on redistribution metal is evident core Bay. distribution Mo, U Pb followed that upper OC Our results strong anthropogenic ore deposits highly suggestive ‘significant pollution signal’. More moderately enriched. Speciation studies showed occurred abundantly non-residual phases. High its high percentage exchangeable reductive phases indicate it was susceptible be mobilized. However, Fe, Cu Ni residual less them expected bio-available.
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