Geochemical factors controlling accumulation of major and trace elements in Greenland coastal and fjord sediments
Geochemical factors controlling accumulation of major and trace elements in Greenland coastal and fjord sediments
复制标题
DOI：
10.1007/s002540050072
复制
发表时间：
1996-07-01
期刊：
影响因子：
--
通讯作者：
Asmund, G
中科院分区：
文献类型：
--
作者：
Loring, DH;Asmund, G
本文测定了格陵兰岛附近峡湾和开放沿海沃茨表层沉积物中主要元素（Al、Ti、Ca、Mg、Fe、Mn、Si）和微量元素（Cd、Cr、Cu、Hg、Li、Ni、Pb、V、Zn）的含量。在区域上，高浓度的Fe，Ti，Mg，Cr，Cu，Ni和V出现在一些西部和东部海岸沉积物中，但它们似乎是天然的，因为没有人为影响的迹象。化学分配表明，大多数重金属在结构上结合在各种硅酸盐，氧化物和硫化物矿物。这些寄主矿物在粗粒和细粒沉积物组分（大于63 μ m和小于63 μ m的物质）中的出现量大致相等，并且以与其他碎屑弹性物质相同的速率积累。物源和冰海沉积是控制常量和微量元素丰度和分布的主要因素。化学成分反映了格陵兰附近的水和冰沉积的冰川海洋物质的来源的矿物学差异。富含Ti、Fe、Mg、Cr、Cu、Ni和V的沉积物的主要来源似乎是格陵兰中生代-第三纪火山岩经冰川侵蚀而形成的物质。
The major (Al, Ti, Ca, Mg, Fe, Mn, Si) and trace element (Cd, Cr, Cu, Hg, Li, Ni, Pb, V, Zn) concentrations in surficial (< 20 cm) sediments from fjords and open coastal waters around Greenland have been determined. Regionally, high concentrations of Fe, Ti, Mg, Cr, Cu, Ni, and V occur in some west and east coast sediments, but they appear to be natural in origin, as there is no indication of anthropogenic influence. Chemical partition indicates that most of the heavy metals are structurally bound in various silicate, oxide, and sulfide minerals. These host minerals occur more or less equally in the coarse and fine sediment fractions (material > 63 mu m and < 63 mu m) and have accumulated at the same rate as other detrital elastic material. Provenance and glaciomarine deposition are the main factors controlling the abundance and distribution of the major and trace elements. The chemical composition reflects the mineralogical differences in the provenance of glacial marine material deposited by water and ice adjacent to Greenland. The main source of the sediments enriched in Ti, Fe, Mg, Cr, Cu, Ni, and V appears to be material derived from the volcanic rocks of the Mesozoic-Tertiary Provinces of Greenland by glacial erosion.