PANGAEA_995258 Sediment and pore water geochemistry of seep core MOZ4-CSF04 offshore northwest Madagascar (PAMELA-MOZ4, 2015) Rooze, Jurjen; Sansjofre, Pierre; Meile, Christof; Böttcher, Michael Ernst; Jouet, Gwenael; Pastor, Lucie Sediment and pore water geochemistry of seep core MOZ4-CSF04 offshore northwest Madagascar (PAMELA-MOZ4, 2015) 2026-07-09 PANGAEA Dataset https://doi.pangaea.de/10.1594/PANGAEA.995258 Investigator Jurjen Rooze Earth Science Event label Optional event label DEPTH, sediment/rock Carbon, organic, total δ13C, total organic carbon Iron, dithionite extractable Iron disulfide δ34S, FeS2 Calcite High magnesium calcite Aragonite δ13C δ18O Iron Aluminium Methane, dissolved δ13C, methane Sulfate, dissolved Hydrogen sulfide, dissolved Iron, dissolved Alkalinity, total Manganese, dissolved Calcium, dissolved Magnesium, dissolved δ13C, dissolved inorganic carbon Porosity, total δ13C, carbonate δ18O, carbonate δ13C, organic carbon geoscientificInformation carbonates Diagenesis Gas seeps iron Madagascar Marine sediment Methane MOZ4-CSF04 PAMELA-MOZ4 pore water Radiocarbon S2-G Stable isotopes Sulfur Cavity ring-down spectroscopy (CRDS) isotopic water analyzer, Picarro Inc., L2130-i; coupled to a Combustion Module (CM), Picarro Inc., A020 Cavity ring-down spectroscopy (CRDS), isotopic water analyzer, Picarro Inc., L2101-i Inductively coupled plasma-atomic emission spectrometer (ICP-AES), HORIBA, ULTIMA 2 Chromium reducible sulfur extraction according to Canfield et al. (1986) Elemental analyzer - isotope ratio mass spectrometer (EA-IRMS), Europa Scientific, ANCA-SL/20–20 X-Ray Diffractometer, Bruker Corporation, D8 ADVANCE Isotope ratio mass spectrometer (IRMS), Thermo Finnigan, MAT 253; coupled with Gas bench II, Thermo Fisher Scientific Wavelength Dispersive X-Ray Fluorescence (WDXRF), Bruker Corporation, S8 Tiger Wave-length dispersive X-ray fluorescence spectroscopy (WD-XRF) Flame Ionization Detector (FID), Perichrom, PR2100 Cavity ring-down spectrometer (CRDS), Picarro, G2201-i Ion chromatograph, Dionex Corporation, ICS-5000 Cline method according to Cline (1969) Inductively coupled plasma mass spectrometer (ICP-MS), ThermoFisher Scientific, Element XR Automatic titrator, Metrohm, 888 Titrando coupled with pH electrode Ion chromatograph, Thermo Scientific, Dionex ICS-5000 GasBench II-IRMS, MAT 253, Thermo Scientific Gravimetric analysis Pourquoi Pas ? (2005) 2015-11-14 2015-11-14 Complete -15.3705 -15.3705 45.951833 45.951833 0.0 m (DEPTH, sediment/rock) 10.673 m (DEPTH, sediment/rock) unrestricted CC-BY-4.0: Creative Commons Attribution 4.0 International English PANGAEA Data Publisher for Earth & Environmental Science https://www.pangaea.de/ Data Center Contact Michael Diepenbroek info@pangaea.de

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Bremen Bremen 28359 Germany online 704 data points text/tab-separated-values Rooze, Jurjen; Sansjofre, Pierre; Meile, Christof; Böttcher, Michael Ernst; Jouet, Gwenael; Pastor, Lucie (2026): Reversible anaerobic oxidation of methane, carbon assimilation, and mineral authigenesis in pockmark sediments over the past 40 kyr: Insights from C–S–O isotopes and diagenetic modelling. Geochimica et Cosmochimica Acta, 424, 361-376, https://doi.org/10.1016/j.gca.2026.04.020 Canfield, Donald E; Raiswell, Robert; Westrich, Joseph T; Reaves, Christopher M; Berner, Robert A (1986): The use of chromium reduction in the analysis of reduced inorganic sulfur in sediments and shales. Chemical Geology, 54 (1-2), 149-155, https://doi.org/10.1016/0009-2541(86)90078-1 Cline, J D (1969): Spectrophotometric determination of hydrogen sulfide in natural waters. Limnology and Oceanography, 14, 454-458, https://doi.org/10.4319/lo.1969.14.3.0454 Kostka, Joel E; Luther, Georg W (1995): Seasonal cycling of Fe in saltmarsh sediments. Biogeochemistry, 29(2), https://doi.org/10.1007/BF00000230

This dataset contains biogeochemical solid-phase and pore water data from sediment core MOZ4-CSF04 (named S2-G in the publication cited below), collected on 14 November 2015 during the PAMELA-MOZ4 oceanographic cruise offshore northwest Madagascar. This core was analyzed to assess the impact of fluid seepage on sediment biogeochemistry and diagenetic processes. Solid-phase parameters comprise total organic carbon (TOC), stable carbon isotopes of organic matter, reactive iron phases (dithionite-extractable Fe), pyrite content (FeS2) and its sulfur isotopic composition (δ34S), carbonate mineralogy (calcite, high Mg-calcite, aragonite), and stable carbon and oxygen isotopes of background carbonates and concretions, as well as δ13C of organic carbon associated with concretions. Bulk elemental concentrations of Fe and Al were determined by X-ray fluorescence (XRF). Pore water analyses include dissolved methane (CH4), sulfate (SO4), sulfide (H2S), dissolved iron (Fe), manganese (Mn), calcium (Ca), magnesium (Mg), total alkalinity (TA), and stable carbon isotopic compositions of methane and dissolved inorganic carbon (DIC). The dataset also includes porosity measurements. ** For all details see the full metadata description at "https://doi.pangaea.de/10.1594/PANGAEA.995258"!

http://www.mindat.org/min-307.html Aragonite http://www.mindat.org/min-859.html Calcite https://doi.org/10.1007/BF00000230 Seasonal cycling of Fe in saltmarsh sediments https://doi.org/10.1016/0009-2541(86)90078-1 Chromium reducible sulfur extraction according to Canfield et al. (1986) https://doi.org/10.1016/0009-2541(86)90078-1 The use of chromium reduction in the analysis of reduced inorganic sulfur in sediments and shales https://doi.org/10.1016/j.gca.2026.04.020 Reversible anaerobic oxidation of methane, carbon assimilation, and mineral authigenesis in pockmark sediments over the past 40 kyr: Insights from C–S–O isotopes and diagenetic modelling https://doi.org/10.4319/lo.1969.14.3.0454 Cline method according to Cline (1969) https://doi.org/10.4319/lo.1969.14.3.0454 Spectrophotometric determination of hydrogen sulfide in natural waters https://en.wikipedia.org/wiki/Porosity Porosity, total https://www.ifremer.fr/fr/flotte-oceanographique-francaise/decouvrez-les-navires-de-la-flotte-oceanographique-francaise/le-pourquoi-pas Pourquoi Pas ? (2005) DIF 9.4 2026-07-09 2026-07-22