Böttcher Michael Ernst michael.boettcher@io-warnemuende.de 0000-0002-8877-0303 Leibniz Institute for Baltic Sea Research, Warnemünde IOW https://www.io-warnemuende.de/en_index.html https://ror.org/03xh9nq73 University of Greifswald https://ror.org/00r1edq15 Brumsack Hans-Jürgen brumsack@icbm.de 0000-0002-5549-5018 Institute for Chemistry and Biology of the Marine Environment, Carl von Ossietzky University Oldenburg, Germany ICBM https://uol.de/en/icbm https://ror.org/033n9gh91 2026 Iron and sulfur geochemistry of deep biosphere sediments from ODP Leg 207, Demerara Rise, southern North Atlantic dataset publication series https://doi.pangaea.de/10.1594/PANGAEA.993242 2026-03-27T07:28:46 The iron and sulfur geochemistry was investigated on squeeze cake samples retrieved from deep biosphere sediments during ODP Leg, Demerara Rise, southern North Atlantic. Vertical profiles from 5 sites were analyzed using different chemical extraction methods followed by spectrophotometric geochemical analyses and organic sulfur using elemental analysis, to understand the carbon-iron-sulfur interactions during and black shale formation and upon diagenesis in the times after. Böttcher Michael Ernst michael.boettcher@io-warnemuende.de 0000-0002-8877-0303 Hetzel Almut Brumsack Hans-Jürgen brumsack@icbm.de 0000-0002-5549-5018 Schipper Andrea 2006 Sulfur-iron-carbon geochemistry in sediments of the Demerara Rise book chapter In: Mosher, DC, Erbacher, J, Malone, MJ (eds.), Proceedings of the Ocean Drilling Program, 207 Scientific Results, Proceedings of the Ocean Drilling Program, 207, Ocean Drilling Program https://doi.org/10.2973/odp.proc.sr.207.108.2006 Hetzel Almut Böttcher Michael Ernst michael.boettcher@io-warnemuende.de 0000-0002-8877-0303 Wortmann Ulrich G 0000-0001-7854-9173 Brumsack Hans-Jürgen brumsack@icbm.de 0000-0002-5549-5018 2009 Paleo-redox conditions during OAE 2 reflected in Demerara Rise sediment geochemistry (ODP Leg 207) journal article Palaeogeography, Palaeoclimatology, Palaeoecology 273(3-4) https://doi.org/10.1016/j.palaeo.2008.11.005 302-328 -54.73331 -54.19908 9.04861 9.45383 -54.42715039999999 9.300325133333336 2003-01-15T14:30:00 2003-10-28T10:10:00 IODP3 International Ocean Drilling Programme https://iodp3.org/ German Research Foundation DFG http://www.dfg.de/en/ https://doi.org/10.13039/501100001659 BO 1584/2 Infrastructure Priority Programme “International Ocean Drilling Programme (IODP³)” (SPP 527) https://www.dfg.de/de/aktuelles/neuigkeiten-themen/info-wissenschaft/2025/ifw-25-88 German Research Foundation DFG http://www.dfg.de/en/ https://doi.org/10.13039/501100001659 BR 775/16 Infrastructure Priority Programme “International Ocean Drilling Programme (IODP³)” (SPP 527) https://www.dfg.de/de/aktuelles/neuigkeiten-themen/info-wissenschaft/2025/ifw-25-88 German Research Foundation DFG http://www.dfg.de/en/ https://doi.org/10.13039/501100001659 BR 775/17 Infrastructure Priority Programme “International Ocean Drilling Programme (IODP³)” (SPP 527) https://www.dfg.de/de/aktuelles/neuigkeiten-themen/info-wissenschaft/2025/ifw-25-88 5 CC-BY-4.0 Creative Commons Attribution 4.0 International https://creativecommons.org/licenses/by/4.0/ The data file contains detailed analytical results on the iron and sulfur geochemistry that was investigated on squeeze cake samples retrieved from deep biosphere sediments during ODP Leg 207, Demerara Rise, southern North Atlantic. Vertical profiles from 5 sites were analyzed using different chemical extraction methods followed by spectrophotometric geochemical analyses, and organic sulfur using elemental analysis, to understand the carbon-iron-sulfur interactions during Cretaceous black shale formation and upon diagenesis in the times after. Squeeze cake samples were taken after pore water retrival and kept frozen and anaerobic until freeze-drying in home laboratory Sample code/label | Sample label | Depth, composite | Depth comp | Unit | dwt. | Iron, dithionite extractable | FeD | Spectrophotometry after room temperature dithionite extraction | Iron, hydrochloric acid soluble | Fe HCl acid soluble | Spectrophotometry after room temperature 0.5 M HCl extraction | dwt.; TRIS = AVS + CrS(II) | Sulfur, total reduced inorganic | TRIS | Spectrophotometric method | dwt.; chromium(II) reducible inorganic sulfur; essentially pyrite | Chromium reducible sulfur | CRS | Acid volatile sulfides | AVS | dwt.; Kerogen-bond-organic sulfur); elemental analysis on washed and dried sediment residue after TRIS extraction | Sulfur, organic | S org | Elemental Analyser, Fison black shale deep biosphere Demerara Rise iron content iron species ODP 207 organic sulfur sulfur content Sulfur species method16824 method18911 method18916 method18917 param105435 param116824 param160303 param164164 param2 param49318 param557603 param790 param88478 pi28867 author10238 author116473 author28306 author28867 author40661 award4914 award4915 award4916 funder20472 geocode1599 geocode1600 geocode1601 inst21719 inst461 inst49 journal12485 license21 project4969 ref129154 ref138885 term53247 term72874 term77325 term77326 term77327 term77328 term77329 term77330 term77331