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>