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首页> 外文期刊>Estuarine Coastal and Shelf Science >Grain size, geochemistry, magnetic susceptibility: Proxies in identifying sources and factors controlling distribution of metals in a tropical estuary, India
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Grain size, geochemistry, magnetic susceptibility: Proxies in identifying sources and factors controlling distribution of metals in a tropical estuary, India

机译：晶粒尺寸，地球化学，磁化率：确定印度热带河口金属分布的来源和控制因素的代理

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摘要

The aim of this study is to understand the various sources and factors controlling the abundance and distribution of the metals through the analyses of selected metals (iron, manganese, chromium, copper, zinc and cobalt), sand, silt, clay, organic carbon and magnetic susceptibility of the surface sediments of Zuari estuary in three different seasons. Total suspended matter (TSM) concentration and salinity of near surface and bottom waters were also measured. The study undertaken for three seasons, based on 18 selected stations all along the estuary, indicated that the concentration of most of the metals were comparatively higher during pre-monsoon than in monsoon and post-monsoon seasons. Further, along the length of the estuary, high concentrations were observed at lower middle and lower estuary and also at few stations at the upstream end. Salinity, distribution of TSM, size of the sediment, organic matter, geomorphological setup, fresh water input from land and release of industrial waste within the estuary played a role in distribution and concentration of metals. Magnetic measurements indicated the dominance of haematite like minerals and helped in understanding the source and depositional processes.
机译：这项研究的目的是通过分析选定的金属（铁，锰，铬，铜，锌和钴），沙子，粉砂，粘土，有机碳和其他金属来了解控制金属丰度和分布的各种来源和因素。三个不同季节Zuari河口表层沉积物的磁化率。还测量了近地表水和底水的总悬浮物（TSM）浓度和盐度。基于整个河口的18个选定站点进行的三个季节的研究表明，季风前大多数金属的浓度比季风后和季风后的季节要高。此外，沿着河口的长度，在较低的中部和较低的河口以及上游端的几个站点都观察到了高浓度。盐度，TSM的分布，沉积物的大小，有机物，地貌设置，来自土地的淡水输入以及河口内工业废物的释放对金属的分布和集中起了作用。磁性测量表明，赤铁矿等矿物占主导地位，并有助于了解其来源和沉积过程。

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