MANGANESE IN SEAWATER AND MARINE MANGANESE BALANCE
MANGANESE IN SEAWATER AND MARINE MANGANESE BALANCE
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DOI：
10.1016/0146-6291(77)90473-8
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发表时间：
1977-01-01
期刊：
影响因子：
--
通讯作者：
SPENCER, DW
中科院分区：
文献类型：
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作者：
BENDER, ML;KLINKHAMMER, GP;SPENCER, DW
马尾藻海、北大西洋西部和太平洋东北部的地表水样本中锰浓度均约为 0.1 ppb。马尾藻海和东北太平洋深水样本的浓度约为这些浓度的 1/4；北大西洋西边界流的浓度处于中等水平。锰从海水中去除的速度可能比一般海洋周转时间（约 1500 年）还要快。下降的地表水和下落的生物碎片中的锰向下输送只能供应远洋沉积物中积累的总量的百分之几，尽管它可以供应铁锰结壳和结核中积累的全部锰。马尾藻海和东北太平洋剖面没有显示深水锰最大值，这表明海底火山活动和热液输入不是深海水或正常中上层沉积物中锰的主要来源。由于沉积物中的锰既不是由海水中溶解的锰提供的，也不是由热液输入提供的，因此远洋沉积物中过量的锰可能来自陆源颗粒。
Surface water samples from the Sargasso Sea, the western North Atlantic and the northeast Pacific all have Mn concentrations of about 0.1 ppb. Sargasso Sea and northeast Pacific deep water samples have about 1/4 those concentrations; concentrations in the North Atlantic western boundary current appear intermediate. Mn is probably removed from seawater more rapidly than the general oceanic turnover time of about 1500 yr. Downward transport of Mn in downwelling surface water and falling biogenic debris can supply only a few per-cent of the total amount accumulating in pelagic sediments, although it can supply all the Mn accumulating in ferromanganese crusts and nodules. A Sargasso Sea and a northeast Pacific profiles show no indication of a deep water Mn maximum, suggesting that submarine volcanism and hydrothermal input is not a major source of Mn to either deep ocean water or normal pelagic sediments. Because the sedimentary Mn is supplied neither by dissolved Mn in seawater nor by hydrothermal inputs, the excess Mn in pelagic sediments probably comes from terrigenous particles.