Blar i forfatter "Crémière, Antoine"

Viser treff 1-3 av 3

    • Boron concentrations and isotopic compositions in methane-derived authigenic carbonates: Constraints and limitations in reconstructing formation conditions 

      Hong, Wei-Li; Lepland, Aivo; Kirsimäe, Kalle; Crémière, Antoine; Rae, James W.B. (Journal article; Tidsskriftartikkel; Peer reviewed, 2021-12-23)
      The boron content and isotopic composition (δ<sup>11</sup>B), of marine carbonates have the potential to constrain CO<sub>2</sub> chemistry during carbonate growth conditions. However, obtaining and interpreting boron compositions from authigenic carbonates in geological archives present several challenges that may substantially limit their application. In particular, contamination from non-carbonate ...

    • Methane seepage at Vestnesa Ridge (NW Svalbard) since the Last Glacial Maximum 

      Schneider, Andrea; Panieri, Giuliana; Lepland, Aivo; Consolaro, Chiara; Crémière, Antoine; Forwick, Matthias; Johnson, J.E.; Plaza-Faverola, Andreia; Sauer, Simone; Knies, Jochen (Journal article; Tidsskriftartikkel; Peer reviewed, 2018-06-21)
      <p>Multiple proxies in the geological record offshore NW Svalbard track shallow subseafloor diagenesis and seafloor methane seepage during the Last Glacial Maximum (LGM) extent and the disintegration of the Svalbard Barents Sea Ice Sheet (SBIS). Vestnesa Ridge, located at 79°N and in 1200 m water depth, is one of the northernmost known active methane seep sites and is characterised by a subseafloor ...

    • Sulfur diagenesis under rapid accumulation of organic-rich sediments in a marine mangrove from Guadeloupe (French West Indies) 

      Crémière, Antoine; Strauss, Harald; Sebilo, Mathieu; Hong, Wei-Li; Gros, Olivier; Schmidt, Sabine; Tocny, Jennifer; Henry, Françoise; Gontharet, Swanne; Laverman, Anniet M. (Journal article; Tidsskriftartikkel; Peer reviewed, 2017-02-21)
      The biogeochemistry of sulfur and carbon during early-diagenetic processes within organic-rich marine mangrove sediments was studied in the “Manche à Eau” lagoon, Guadeloupe, West Indies. These sediments are characterized by a total organic carbon content (TOC) mostly above 11 wt%, δ<sup>13</sup>C<sub>TOC</sub> below − 25‰ VPDB and C/N<sub>molar</sub> ratios exceeding 15. Rates of mangrove-derived ...