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 site 1257 dataset https://doi.pangaea.de/10.1594/PANGAEA.993243 2026-03-27T07:28:46 https://doi.pangaea.de/10.1594/PANGAEA.993242 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 -54.34195999999997 -54.34158000000002 9.45343 9.45383 -54.34177999999997 9.45363 2003-01-15T14:30:00 2003-01-22T15:30:00 1.45 275.81 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-25-88 207-1257A 9.45383 -54.34196 -2951.0 2003-01-15T14:30:00 2003-01-19T22:45:00 284.7 m 216.05 m North Atlantic Ocean Leg207 https://doi.org/10.2973/odp.proc.ir.207.2004 2003-01-04 2003-03-06 Joides Resolution https://www-odp.tamu.edu:443/resolutn.html Drilling/drill rig DRILL 31 core; 284.7 m cored; 0 m drilled; 75.9 % recovery 207-1257B 9.45363 -54.3418 -2951.0 2003-01-19T22:45:00 2003-01-21T13:20:00 227.3 m 116.23 m North Atlantic Ocean Leg207 https://doi.org/10.2973/odp.proc.ir.207.2004 2003-01-04 2003-03-06 Joides Resolution https://www-odp.tamu.edu:443/resolutn.html Drilling/drill rig DRILL 27 cores; 187.3 m cored; 40 m drilled; 62.1 % recovery 207-1257C 9.45343 -54.34158 -2951.0 2003-01-21T13:20:00 2003-01-22T15:30:00 235.9 m 96.6 m North Atlantic Ocean Leg207 https://doi.org/10.2973/odp.proc.ir.207.2004 2003-01-04 2003-03-06 Joides Resolution https://www-odp.tamu.edu:443/resolutn.html Drilling/drill rig DRILL 16 cores; 153.9 m cored; 82 m drilled; 62.8 % recovery 195 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 Event label Event Böttcher Michael Ernst michael.boettcher@io-warnemuende.de 0000-0002-8877-0303 Event Date/Time of event Date/Time Böttcher Michael Ernst michael.boettcher@io-warnemuende.de 0000-0002-8877-0303 Date/Time Latitude of event Latitude Böttcher Michael Ernst michael.boettcher@io-warnemuende.de 0000-0002-8877-0303 Latitude Longitude of event Longitude Böttcher Michael Ernst michael.boettcher@io-warnemuende.de 0000-0002-8877-0303 Longitude Sample code/label Sample label Böttcher Michael Ernst michael.boettcher@io-warnemuende.de 0000-0002-8877-0303 Sample label Depth, composite Depth comp mcd depth http://purl.obolibrary.org/obo/PATO_0001595 Luminous Intensity J http://dbpedia.org/resource/Luminous_intensity Böttcher Michael Ernst michael.boettcher@io-warnemuende.de 0000-0002-8877-0303 Depth comp [mcd] DEPTH, sediment/rock Depth sed m depth http://purl.obolibrary.org/obo/PATO_0001595 sediment http://purl.obolibrary.org/obo/ENVO_00002007 rock Length L http://dbpedia.org/resource/Length Böttcher Michael Ernst michael.boettcher@io-warnemuende.de 0000-0002-8877-0303 mbsf Depth sed [m] Unit Unit Böttcher Michael Ernst michael.boettcher@io-warnemuende.de 0000-0002-8877-0303 Unit Iron, dithionite extractable FeD % Dimensionless Ratio ψ Spectrophotometry after room temperature dithionite extraction Böttcher Michael Ernst michael.boettcher@io-warnemuende.de 0000-0002-8877-0303 dwt. FeD [%] Iron, hydrochloric acid soluble Fe HCl acid soluble mg/kg Spectrophotometry after room temperature 0.5 M HCl extraction Böttcher Michael Ernst michael.boettcher@io-warnemuende.de 0000-0002-8877-0303 Fe HCl acid soluble [mg/kg] Sulfur, total reduced inorganic TRIS % sulfur Dimensionless Ratio ψ Spectrophotometric method Böttcher Michael Ernst michael.boettcher@io-warnemuende.de 0000-0002-8877-0303 dwt.; TRIS = AVS + CrS(II) TRIS [%] Chromium reducible sulfur CRS % Dimensionless Ratio ψ Spectrophotometric method Böttcher Michael Ernst michael.boettcher@io-warnemuende.de 0000-0002-8877-0303 dwt.; chromium(II) reducible inorganic sulfur; essentially pyrite CRS [%] Acid volatile sulfides AVS mg/kg Spectrophotometric method Böttcher Michael Ernst michael.boettcher@io-warnemuende.de 0000-0002-8877-0303 AVS [mg/kg] Sulfur, organic S org % sulfur organic Dimensionless Ratio ψ Elemental Analyser, Fison Böttcher Michael Ernst michael.boettcher@io-warnemuende.de 0000-0002-8877-0303 dwt.; Kerogen-bond-organic sulfur); elemental analysis on washed and dried sediment residue after TRIS extraction S org [%] CurationLevelC Enhanced curation https://wiki.pangaea.de/wiki/Curation_levels ProcLevel3 PANGAEA data processing level 3 https://wiki.pangaea.de/wiki/Processing_levels#PANGAEA_data_processing_level_3 black shale deep biosphere Demerara Rise iron content iron species ODP 207 organic sulfur sulfur content Sulfur species author10238 author116473 author28306 author28867 author40661 award4914 award4915 award4916 basis5 campaign25503 curlevel30 event2106591 event2106592 event2106593 funder20472 geocode1 geocode1599 geocode1600 geocode1601 geocode8128 inst21719 inst461 inst49 journal12485 license21 method10974 method16824 method18911 method18916 method18917 param105435 param116824 param160303 param164164 param2 param49318 param557603 param790 param88478 pi28867 proclevel40 project4969 ref129154 ref138885 term1073131 term21434 term38263 term40685 term41056 term43794 term43863 term43884 term44419 term53247 term72874 term77325 term77326 term77327 term77328 term77329 term77330 term77331