Sequential extraction procedure to obtain the composition of terrigenous detritus in marine sediments.
Sequential extraction procedure to obtain the composition of terrigenous detritus in marine sediments.
复制标题
连续提取程序以获得海洋沉积物中的陆源碎屑的成分。
DOI：
10.1016/j.mex.2020.100888
复制
发表时间：
2020
期刊：
影响因子：
1.9
通讯作者：
Simon MH
中科院分区：
文献类型：
--
作者：
Simon MH
海洋沉积物中陆源粘土的地球化学和同位素组成可以提供沉积物来源和沉积路径的重要信息。为了从大量海洋沉积物中提取碎屑信号，通常应用标准的沉积物浸出方法来去除碳酸盐和铁锰氧化物。与大多数旨在从海洋沉积物中提取陆地信号的先前研究相比，我们在整个样品制备过程中额外应用了氯化铯清洗Simon等人。[1]。这一额外步骤背后的动机（不经常使用）是去除由于海洋中或沥滤过程中自生微量金属的再吸附而在粘土表面获得的离子，如果不进行阳离子交换，这些离子可能会改变碎屑部分的原始组成。在这里，我们提出了一种改进的详细分步浸出方案，用于提取散装深海沉积物的碎屑部分，包括常用的缓冲乙酸和酸还原混合溶液，包括最终的阳离子交换洗涤。·去除碳酸盐和铁锰氧化物的标准方法和斯托克斯沉降以分离粘土部分·额外应用阳离子阳离子交换洗涤（CsCl）·去除由于海洋中或浸出过程中自生痕量金属的吸附而在粘土表面获得的离子
The geochemical and isotopic composition of terrigenous clays from marine sediments can provide important information on the sources and pathways of sediments. In order to extract the detrital signal from bulk marine sediments, standard sediment leaching methods are commonly applied to remove carbonate and ferromanganese oxides. In comparison to most previous studies that aimed to extract the terrestrial signal from marine sediments we additionally applied a CsCl wash throughout the sample preparation Simon et al. [1]. The motivation behind that extra step, not frequently applied, is to remove ions that are gained on the clay surface due to re-adsorption of authigenic trace metals in the ocean or during the leaching procedure and thus could alter the original composition of the detrital fraction if no cation exchange was applied. Here we present an improved and detailed step-by-step leaching protocol for the extraction of the detrital fraction of bulk deep-sea sediments including commonly used buffered acetic acid and acid-reductive mix solutions including a final cation exchange wash.•standard method to remove carbonate and ferromanganese oxides and Stokes settling to isolate the clay fractions•additional application of cation cation exchange wash (CsCl)•removal of ions that are gained on the clay surface due to adsorption of authigenic trace metals in the ocean or during the leaching procedure