Electrochemical data from sediment cores collected on the Louisiana Shelf of the Northern Gulf of Mexico during November 2020 on R/V Savannah cruise SAV-20-07

This data set reports sediment depth profiles of dissolved O2, Mn2+, Fe2+, and total dissolved sulfide (SH2S) concentrations, as well as pH and current intensities of organic-Fe(III) complexes and aqueous clusters of FeS (FeS(aq)) that cannot be quantified directly. These data were obtained by profiling intact sediment cores using voltammetric and pH microelectrodes deployed on a computer-operated micromanipulator. Sediment cores were collected at five different stations on the Louisiana Shelf on the Northern Gulf of Mexico during the week of November 3-6, 2020 using an MC-800 multi-corer. These stations extend from the middle of the shelf offshore from Cocodrie, LA to the mouth of the Mississippi River North West Pass. All depth profiles were started within 30 minutes after collection. The field sampling was conducted during R/V Savannah cruise SAV-20-07.本数据集收录沉积物深度剖面数据，涵盖溶解氧（dissolved O₂）、锰离子（Mn²+）、亚铁离子（Fe²+）与总溶解硫化物（total dissolved sulfide, SH₂S）的浓度信息，同时包含pH值，以及有机铁(III)配合物（organic-Fe(III) complexes）与FeS水相团簇（FeS(aq)）的电流强度数据——该类电流强度无法直接定量。上述数据通过搭载于计算机操控微操作台（computer-operated micromanipulator）上的伏安微电极（voltammetric microelectrode）与pH微电极，对完整沉积物岩芯进行剖面扫描采集所得。沉积物岩芯采自墨西哥湾北部路易斯安那陆架的5个不同站位，采集工作于2020年11月3日至6日期间开展，所用采样设备为MC-800型多管采泥器（MC-800 multi-corer）。该批站位覆盖范围从路易斯安那州科科德里近海的陆架中部延伸至密西西比河西北航道河口区域。所有深度剖面测量均在岩芯采集后30分钟内启动。本次野外采样由‘萨凡纳号’科考船（R/V Savannah）航次SAV-20-07执行完成。