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Sedimentation rates and characteristics of manganese micronodules

机译:沉淀率和锰微芯片的特征

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摘要

A study of core sections from the northern tropical Pacific (Northeast Basin) revealed that pelagic sediments are represented by Quaternary oxidized carbonate-free clayeyaEuro'radiolarian to radiolarianaEuro'clayey mud, miopelagic clays locally enriched in radiolarians, and pre-Pleistocene miopelagic to eupelagic clays, zeoliteaEuro'clayey varieties, and zeolitites. The study also included an analysis of the grain-size and chemical composition, abundance, mass, and distribution of manganese micronodules (MN) contained in these sediments. The data made it possible to calculate relative sedimentation rates (Vr) in sections. In calculations, the estimate of the absolute (V) sedimentation rates for the upper (homogenous) core layer (approximately 5 ka old) was taken to represent a basic value. The values of relative sedimentation rates give grounds to assume that the mass of micronodules (Pmn), average mass of a single micronodule (Pmn/Nmn), mass of the sediment fraction (Pfr > 005 mm), and abundance of micronodules in sediments (Pmn/Psed) reflect the trends of variations in pelagic sedimentation rates.
机译:北部热带太平洋(东北盆地)的核心部分研究表明,古典氧化碳酸化粘土的甲酸克莱伊氏菌与放射性乳糖型富含呋喃甲基粘土的核心沉积物,对欧化胶质粘土的前列腺内茂甲基粘土和预先亲中茂的粘土。 ,Zeoliteaeuro'clayey品种和zeolitites。该研究还包括对这些沉积物中含有的晶粒尺寸和化学成分,丰度,质量和分布的分析。数据使得可以在部分中计算相对沉降速率(VR)。在计算中,对上(均匀)芯层(大约5ka旧)的绝对(v)沉降速率的估计表示基本值。相对沉降率的值施用地,假设微渗(PMN)的质量(PMN),单个微泡(PMN / NMN)的平均质量(PMN / NMN),沉积物级分的质量(PFR> 005mm)和沉积物中的微芯片的丰度( PMN / PSED)反映了皮袋沉降率的变化趋势。

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  • 来源
    《Oceanology》 |2017年第3期|共15页
  • 作者单位

    Russian Acad Sci Shirshov Inst Oceanol Moscow 117218 Russia;

    Moscow MV Lomonosov State Univ Dept Geol Moscow 119991 Russia;

    Russian Acad Sci Shirshov Inst Oceanol Moscow 117218 Russia;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 海洋学;
  • 关键词

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