Pore water chemical concentration data and location from push cores collected by the ROV Jason II on dive J2-773 from cruise MSM37 on R/V Maria S. Merian from March to April 2014 (NCEI Accession 0277831)

This dataset contains chemical and physical data collected on R/V Maria S. Merian during cruise MSM37 in the North Atlantic Ocean on 2014-04-11. These data include Fe, Mn, Si, Sulfur, and pH. The instruments used to collect these data include Inductively Coupled Plasma Mass Spectrometer, Inductively Coupled Plasma Optical Emission Spectrometer, Push Corer, and ROV Jason. These data were collected by Dr C. Geoffrey Wheat of Monterey Bay Aquarium Research Institute as part of the "Characterization of Microbial Transformations in Basement Fluids, from Genes to Geochemical Cycling (North Pond Microbes)" project and "Center for Dark Energy Biosphere Investigations (C-DEBI)" and "International Ocean Discovery Program (IODP)" programs. The Biological and Chemical Oceanography Data Management Office (BCO-DMO) submitted these data to NCEI on 2019-04-18.

The following is the text of the dataset description provided by BCO-DMO:

Pore water chemical concentration data and location from push cores collected by the ROV Jason II on dive J2-773

Dataset Description:
Acquisition Description:
Push cores were collected by the ROV Jason II on dive J2-773 on 11-April-2014.

Pore waters were extracted in a cold room at 4C using acid-rinsed, washed and dried rhizomes. The first 2 ml of fluid was discarded, then the remaining fluid was filtered through a 0.45 micron membrane and stored in hot acid (60C) washed high-density polyethylene bottles. Fluids were analyzed by electrode (pH), titration (chlorinate, calcium, and alkalinity), colorimetric (nitrate), inductively coupled optical emission spectroscopy (ICPOES), and inductively coupled mass spectroscopy (ICPMS). Precision was generally 0.2% for chlorinate and calcium titrations, 2% for alkalinity titrations, 0.01 for pH, 5% for nitrate determinations, 2% for ICPOES measurements and 5% for ICPMS measurements. All measurements were above detection limits with the exception of Mn (0.1 umol/kg) and Fe (0.01 mol/kg).

Careful consideration of these data should examine the potential of sampling artifacts for many of the solutes. We believe, for example, the Ca difference from bottom seawater values is an artifact of sample handling, resulting from the movement of sediment with carbonate present to the ship where the sediment was handled. Other solutes are likewise probably affected.