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Trace element distribution: An indicator of fossil brachiopod shell preservation
Author(s): 
Pages: 584-591
Year: Issue:  6
Journal: GEOCHIMICA

Keyword:  微量元素腕足化石成岩作用地球化学碳酸盐LA-ICP-MS;
Abstract: 以产于四川龙门山地区泥盆系观雾山组的有铰纲腕足化石Independatrpa lemma Chen为研究对象,利用激光熔样等离子质谱(LA-ICP-MS)对其壳体棱柱层中Fe、Mg、Mn、Na、Ba和Sr六种微量元素进行了就位分析.它们在壳体横切面中的对称分布特征总体上与壳体增生方式和过程相一致,表明壳体的绝大部分未经成岩作用的改造.与常用的结构判据、阴极发光判据和微量元素含量判据相比较,微量元素分布判据以壳体的原生特征为依据,具有绝对性.
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