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首页> 外文期刊>Environmental Monitoring and Assessment >Geochemistry of the suspended sediment in the estuaries of the Mandovi and'Zuari rivers, central west coast of India
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Geochemistry of the suspended sediment in the estuaries of the Mandovi and'Zuari rivers, central west coast of India

机译：印度中西部海岸曼多维河和祖拉里河河口悬浮泥沙的地球化学

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摘要

The geochemistry of the suspended partic-ulate matter (SPM) collected during the monsoon was determined to identify the sources of SPM and to understand the physicochemical processes in the Mandovi and Zuari river estuaries. The concentrations of SPM decrease seaward in both estuaries, but are relatively high at bay stations. Kaolinite is the most dominant clay mineral in the upstream of both rivers. Smectite increases seaward in both estuaries and is abundant in the bay. Upstream stations of Mandovi, where ore deposits are stored on the shore, exhibit high Fe, Mn, total rare earth elements (ΣREE), and middle REE- and heavy REE-enriched patterns. Channel stations of both estuaries exhibit middle REE- and light REE-enriched patterns, which gradually changed seaward to middle REE- and heavy REE-enriched patterns. Canal stations exhibit the highest concentrations of major and trace metals. High metal/Al ratios occur at stations in the upstream of Zuari and at the confluence of canals in the Mandovi estuary. Enrichment factors of metals indicate that Mn is significantly polluted while other metals are moderately polluted. The δ~(13)C and δ~(15)N of organic matter indicate that the terrigenous organic matter at the upstream is diluted seaward by marine organic matter. Organic matter at bay stations is largely marine and altered-type. The compositions of SPM are controlled by the particu-lates from ore dust, the geology of the drainage basins, and the physicochemical processes in the estuaries. Particulates resuspended from the bay are dominated by ore dust, which are advected into the channels of both estuaries during the lull periods of the monsoon.
机译：确定了季风期间收集的悬浮颗粒物（SPM）的地球化学，以识别SPM的来源并了解曼多维河和祖阿里河口的理化过程。在两个河口，SPM的浓度都向海减小，但在海湾站则相对较高。高岭石是两条河流上游最主要的粘土矿物。蒙脱石在两个河口都向海增加，并且在海湾中含量丰富。曼多维（Mandovi）的上游站（矿床存储在海岸上）显示出高的铁，锰，总稀土元素（ΣREE）以及中等的REE和重REE富集模式。两个河口的航道站均表现出中等的REE和轻度REE富集模式，并逐渐向海转变为中等REE和中度REE富集模式。运河站的主要金属和痕量金属含量最高。高金属/铝比发生在Zuari上游的站点和曼多维河口的运河汇合处。金属的富集因子表明Mn被严重污染，而其他金属被中度污染。有机质的δ〜（13）C和δ〜（15）N表明上游的陆源有机质被海洋有机质向海稀释。海湾站的有机物主要是海洋生物和蚀变类型。 SPM的组成受矿石粉尘，流域的地质以及河口的理化过程控制。从海湾重新悬浮的颗粒物以矿石粉尘为主，在季风淡季期间，这些矿石粉尘进入两个河口的通道。

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  • 来源
    《Environmental Monitoring and Assessment》 |2013年第5期|4461-4480|共20页
  • 作者

    Pratima M. Kessarkar; R. Shynu; V. Purnachandra Rao; Feng Chong; Tanuja Narvekar; Jing Zhang;

  • 作者单位

    CSIR-National Institute of Oceanography,Dona Paula 403 004 Goa, India;

    CSIR-National Institute of Oceanography,Dona Paula 403 004 Goa, India;

    CSIR-National Institute of Oceanography,Dona Paula 403 004 Goa, India;

    State Key Laboratory of Estuarine and Coastal Research,East China Normal University,3663 Zhongshan Road North,Shanghai 200062, People's Republic of China;

    CSIR-National Institute of Oceanography,Dona Paula 403 004 Goa, India;

    State Key Laboratory of Estuarine and Coastal Research,East China Normal University,3663 Zhongshan Road North,Shanghai 200062, People's Republic of China;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《化学文摘》(CA);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    suspended sediment; estuarine processes; clay minerals; major and trace metals; mandovi and zuari estuaries;

    机译：悬浮沉积物河口过程;粘土矿物;主要和微量金属;曼多维和祖阿里河口;

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