Iron and sulfur geochemistry of deep biosphere sediments from ODP Leg 207 site 1257

The iron and sulfur geochemistry was investigated on squeeze cake samples retrieved from deep biosphere sediments during ODP Leg, Demerara Rise, southern North Atlantic. Vertical profiles from 5 sites were analyzed using different chemical extraction methods followed by spectrophotometric geochemical analyses and organic sulfur using elemental analysis, to understand the carbon-iron-sulfur interactions during and black shale formation and upon diagenesis in the times after.

本研究针对北大西洋南部德马拉隆起（Demerara Rise）海域大洋钻探计划（Ocean Drilling Program, ODP）航次所获取的深部生物圈沉积物压榨饼样品，开展铁与硫地球化学特征探究。研究对5个钻探站位的垂直剖面样品采用多种化学萃取方法进行前处理，随后结合分光光度法地球化学分析与元素分析法测定有机硫组分，以此阐明黑色页岩形成过程及后期成岩作用阶段的碳-铁-硫相互作用机制。