Sulfate reduction rates at Main Endeavor grotto chimney from samples collected on RV Atlantis (AT18-08) during Jason II dives in the Juan de Fuca Ridge from July to August 2011

<p>The effects of key environmental variables (temperature, pH, H2S, SO42-, DOC) on sulfate reduction rates in material recovered from a hydrothermal flange from the Grotto edifice in the Main Endeavor Field, Juan de Fuca Ridge. Sulfate reduction was measured in batch reactions across a range of&nbsp;physico-chemical&nbsp;conditions. Temperature and pH were the strongest stimuli, and maximum sulfate reduction rates were observed at 50 degrees celsius and pH 6.</p>

<p>Information for this dataset was derived from single massive piece of hydrothermal deposit (approximately ~100 kg in weight) that was recovered from a flange on the Grotto vent (47.949, -129.098) at a depth of 2188.3 m (Dive J2-575, AT-18-08, <em>R/V Atlantis</em>) and brought up to the surface in the basket of the <em>ROV Jason II</em>.&nbsp;</p>

<p><strong>Analysis and </strong><strong>write-up</strong><strong> of these data are found in Frank <em>et al</em>., 2015</strong></p>

本数据集聚焦胡安·德·富卡洋脊（Juan de Fuca Ridge）主奋进区（Main Endeavor Field）洞穴构造（Grotto edifice）热液法兰盘（hydrothermal flange）回收样品中关键环境变量对硫酸盐还原速率的影响，所涉变量包括温度、pH、硫化氢（H₂S）、硫酸盐（SO₄²⁻）与溶解有机碳（DOC）。研究通过批量反应体系，在一系列物化条件下测定了硫酸盐还原速率，结果表明温度与pH为影响最为显著的调控因子，在50℃、pH=6的条件下可观测到最高的硫酸盐还原速率。

本数据集的样品来源于一块单块大型热液沉积物，重量约100 kg。该样品于2188.3米水深处从洞穴喷口（Grotto vent）的法兰盘处回收，采样坐标为47.949、-129.098，下潜任务编号为Dive J2-575与AT-18-08，搭载平台为“亚特兰蒂斯号”研究船（R/V Atlantis），并通过“杰森二号”遥控无人潜水器（ROV Jason II）的机械吊篮带回海面。

本数据集的分析与研究成文详见Frank等人2015年发表的研究成果。