PELAGIC SEDIMENTATION OF ARAGONITE - ITS GEOCHEMICAL SIGNIFICANCE
PELAGIC SEDIMENTATION OF ARAGONITE - ITS GEOCHEMICAL SIGNIFICANCE
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DOI：
10.1126/science.211.4485.940
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发表时间：
1981-01-01
期刊：
影响因子：
56.9
通讯作者：
HONJO, S
中科院分区：
文献类型：
--
作者：
BERNER, RA;HONJO, S
对从沉积物收集器和开阔大西洋异常浅的部分（格兰德河海隆）收集的样品进行定量X射线衍射研究，评价了文石与方解石相比，在深海海底的远洋通量的相对重要性。在世界范围内，文石通量占CaCO3总通量的至少12%。几个样本中含有高镁方解石，这表明落入深海海底的一些钙质物质可能来自浅水底栖生物的碎片的远距离运输和浮游生物遗骸的沉降。这一观察结果支持了12%是最低值的论点。文石和高镁方解石从浅水区横向运输，在沉淀到深水溶解，可能有助于中和过量的人为CO2添加到海洋。
The relative importance of the pelagic flux of aragonite, as compared to calcite, to the deep-sea floor was evaluated, using a quantitative X-ray diffraction study of samples collected from sediment traps and from an unusually shallow portion of the open Atlantic Ocean (the Rio Grande Rise). The aragonite flux constitutes at least 12% of the total flux of CaCO3 on a worldwide basis. The presence of high-magnesium calcite in several samples suggests that some of the calcareous material falling to the deep-sea floor may be derived from long-distance transport of debris from shallow-water benthic organisms and from the settling of planktonic remains. This observation supports the contention that 12% represents a minimum value. Aragonite and high-magnesium calcite transported laterally from shallow-water regions, upon dissolution during settling into deeper water, may contribute to the neutralization of excess anthropogenic CO2 added to the oceans.