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海洋沉积物中的石英作为陆源物质的标志性矿物,是古环境和古气候演化的信息载体,已成为古环境和古气候演化研究的重要替代指标。提供了改进了的化学分离海洋沉积物中石英单矿物的方法流程。在流程中的不同阶段可有效去掉全样中的生物组分、粘土矿物和长石等,取得海洋沉积物全样的总陆源矿物、石英+长石、石英的相对和绝对含量,通过计算可获得各种组分的通量,通过粒度分析可获得粒度数据。同一样品的17次重复实验表明,含量结果的平均相对误差仅为2 36%;显微镜和X射线衍射分析检查所分离出的石英纯度可达98%以上;激光粒度分析表明,化学试剂对石英的溶蚀作用不明显,不影响粒度分析结果。
As a landmark mineral of terrigenous material, quartz in marine sediments is the information carrier of paleoenvironment and paleoclimate evolution, and it has become an important alternative index for paleoenvironment and paleoclimate evolution research. An improved process flow for the chemical separation of quartz mono-mineral in marine sediments is provided. In different stages of the process can effectively remove the whole sample of biological components, clay minerals and feldspar, etc., to obtain a full sample of marine sediments of terrestrial minerals, quartz + feldspar, quartz relative and absolute content, by calculating The flux of the various components is obtained, and the particle size data can be obtained by the particle size analysis. The 17 replicates of the same sample showed that the average relative error of the content results was only 2 36%. The purity of quartz isolated by microscopy and X-ray diffraction analysis was over 98%. The laser particle size analysis showed that the chemical reagent Dissolution is not obvious, does not affect the results of particle size analysis.