After normalized with the typical terrestrial element Sc, iridium shows marked enrichment at the B/M boundary;

用地壳元素钪进行标准化之后，铱异常十分明显，而其它元素在界线附近则没有变化。

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After normalized with the typical terrestrial element Sc, iridium shows marked enrichment at the B/M boundary;

用地壳元素钪进行标准化之后，铱异常十分明显，而其它元素在界线附近则没有变化。

youdao