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Geochemistry of 0.7 Ma B.P. microtektite bearing loess layers (IV) - Trace elements

机译:地球化学特征为0.7 Ma B.P.含黄铁矿的黄土层(IV)-微量元素

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ab:INNA of sequential samples of great dense intervals within, above and below the 0.73 Ma B.P. microtektite-bearing loess layers revealed discernible anomalies of Cr, Co, Mo, Hf, Ta, Sc and As in an about 12-cm layer of the microtektite-bearing loess, in spite of serious dilution of trace elements caused by rapid accumulation of loess. The anomalous layer is in the lower part of the microtektite-bearing loess layers, and exactly coincides with anomalies of C isotope components, magnetic susceptibility and grain-size distribution. Thereupon we conclude that the trace element anomalies reflect contamination of the loess sediments by the impact materials. Owing to high accumulative rate of the loess, serious dilution made intensity of the anomalies reduce and most likely concealed anomalies of Ir and ∑Pt content,
机译:ab:在0.73 Ma B.P.以内,之上和之下的高密集间隔的连续样本的INNA。尽管由黄土的快速堆积引起微量元素的严重稀释,但在含黄铁矿的黄土层中约有12 cm的层中发现了Cr,Co,Mo,Hf,Ta,Sc和As的明显异常。 。异常层位于含微晶石的黄土层的下部,并且与C同位素组分,磁化率和粒度分布的异常完全吻合。因此,我们得出结论,微量元素异常反映了冲击材料对黄土沉积物的污染。由于黄土积累率高,严重稀释使异常强度降低,最有可能掩盖了Ir和∑Pt含量异常,

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