Blog
About

  • Record: found
  • Abstract: found
  • Article: found
Is Open Access

Data report: quantification of potential drilling contamination using perfluorocarbon tracer at IODP Expedition 329 sites

Read this article at

ScienceOpenPublisher
Bookmark
      There is no author summary for this article yet. Authors can add summaries to their articles on ScienceOpen to make them more accessible to a non-specialist audience.

      Abstract

      To quantify the potential for biological contamination associated with the coring process, we conducted perfluorocarbon tracer (PFT) analysis on 556 sediment samples from Integrated Ocean Drilling Program (IODP) Expedition 329. The expedition cored deep-sea sediment at seven sites in the South Pacific Gyre (Sites U1365-U1371). We analyzed two types of sediment samples: (1) samples taken in the central part of the core (i.e., interior samples) and (2) samples taken near the core edge (i.e., exterior samples). We calculated the amount of potential drilling fluid intrusion from the mass of PFT that we measured in each sample. For the seven Expedition 329 sites (15 holes analyzed), PFT content ranges from below detection to levels where contamination is extremely apparent. The centers of the sediment cores (interior samples) contained generally less PFT than the core margins (exterior samples) and thus have lower potential drilling fluid (DF) contamination. The majority of sediment samples (interior) at Sites U1370 and U1371 have a contamination potential close to or below detection levels (i.e., 1.19 × 10<sup>-4</sup> ng<sub>PFT</sub>/g<sub>sediment</sub> or 1.78 × 10<sup>-3</sup> µL<sub>DF</sub>/g<sub>sediment</sub> on average). We observed higher contamination values (i.e., 7.28 × 10<sup>-3</sup> ng<sub>PFT</sub>/g<sub>sediment</sub> or 6.98 × 10<sup>-2</sup> µL<sub>DF</sub>/g<sub>sediment</sub> on average) at Sites U1365, U1366, and U1367. Finally, we measured much higher PFT concentrations throughout the sediment of Sites U1368 and U1369 (i.e., 5.48 × 10<sup>-2</sup> ng<sub>PFT</sub>/g<sub>sediment</sub> or 6.60 × 10<sup>-1</sup> µL<sub>DF</sub>/g<sub>sediment</sub> on average). We observe no apparent correlation of sample PFT content to sediment lithology, degree of sediment disturbance, core section number, or porosity.

      Related collections

      Most cited references 8

      • Record: found
      • Abstract: not found
      • Article: not found

      Presence of oxygen and aerobic communities from sea floor to basement in deep-sea sediments

        Bookmark
        • Record: found
        • Abstract: not found
        • Article: not found

        Trends in Basalt and Sediment Core Contamination During IODP Expedition 301

          Bookmark
          • Record: found
          • Abstract: not found
          • Article: not found

          Methods for Quantifying Potential Microbial Contamination during Deep Ocean Coring

            Bookmark

            Author and article information

            Journal
            10.2204/iodp.proc.329.2011
            Proceedings of the IODP
            Integrated Ocean Drilling Program
            1930-1014
            30 January 2017
            10.2204/iodp.proc.329.204.2017

            This work is licensed under a Creative Commons Attribution 4.0 Unported License. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/

            Product
            Self URI (journal page): http://publications.iodp.org/

            Comments

            Comment on this article