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Data report: elemental, isotopic, and Rock-Eval compositions of bulk sediments from Hole U1357A in the Adélie Basin, Antarctica: Expedition 318

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Proceedings of the IODP

Integrated Ocean Drilling Program

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      Abstract

      We examined the elemental (total nitrogen, total organic carbon, and C/N), isotopic (δ<sup>13</sup>C<sub>org</sub> and δ<sup>15</sup> N<sub>org</sub> ), and Rock-Eval pyrolysis (S<sub>2</sub>, S<sub>3</sub>, hydrogen index, oxygen index, and T<sub>max</sub> ) compositions of bulk marine sediments from Hole U1357A in the Adelie Basin, Antarctica, to assess the organic geochemical characteristics and vertical variations in the late Holocene diatomaceous-dominated sediments. Pyrolysis parameters indicate that most of the organic materials are immature and in the Type II stage, indicative of a marine source. In contrast, the results from a conventional cross-plot of δ<sup>13</sup>C<sub>org</sub> vs. total organic carbon/total nitrogen indicate organic materials that originated as freshwater organic carbon, not marine organic carbon. Given that <sup>13</sup>C-depleted phytoplankton are dominant in diatomaceous ooze-rich sediments of the Adelie Basin, the apparent dominance of freshwater organic matter is likely attributable to the extremely low δ<sup>13</sup>C<sub>org</sub> (ppm) values in the bulk sediments.

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      Nitrogen and carbon isotopic composition of bone collagen from marine and terrestrial animals

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        Correlation of carbon and nitrogen stable isotope ratios in sedimentary organic matter 1

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          Méthode rapide de caractérisation des roches mètres, de leur potentiel pétrolier et de leur degré d'évolution

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            Author and article information

            Journal
            10.2204/iodp.proc.318.2011
            Proceedings of the IODP
            Integrated Ocean Drilling Program
            1930-1014
            14 October 2014
            10.2204/iodp.proc.318.201.2014

            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/

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

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