/* DATA DESCRIPTION: Citation: Böttcher, Michael Ernst; Brumsack, Hans-Jürgen (2026): Iron and sulfur geochemistry of deep biosphere sediments from ODP Leg 207 site 1257 [dataset]. PANGAEA, https://doi.pangaea.de/10.1594/PANGAEA.993243 (DOI registration in progress), In: Böttcher, ME; Brumsack, H-J (2026): Iron and sulfur geochemistry of deep biosphere sediments from ODP Leg 207, Demerara Rise, southern North Atlantic [dataset publication series]. PANGAEA, https://doi.pangaea.de/10.1594/PANGAEA.993242 (DOI registration in progress) Abstract: 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. Keyword(s): black shale; deep biosphere; Demerara Rise; iron content; iron species; ODP 207; organic sulfur; sulfur content; Sulfur species Related to: Böttcher, Michael Ernst; Hetzel, Almut; Brumsack, Hans-Jürgen; Schipper, Andrea (2006): Sulfur-iron-carbon geochemistry in sediments of the Demerara Rise. 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; Wortmann, Ulrich G; Brumsack, Hans-Jürgen (2009): Paleo-redox conditions during OAE 2 reflected in Demerara Rise sediment geochemistry (ODP Leg 207). Palaeogeography, Palaeoclimatology, Palaeoecology, 273(3-4), 302-328, https://doi.org/10.1016/j.palaeo.2008.11.005 Project(s): International Ocean Drilling Programme (IODP3) (URI: https://iodp3.org/) Funding: German Research Foundation (DFG) (URI: http://www.dfg.de/en/), grant/award no. BO 1584/2: Infrastructure Priority Programme “International Ocean Drilling Programme (IODP³)” (SPP 527) (URI: https://www.dfg.de/de/aktuelles/neuigkeiten-themen/info-wissenschaft/2025/ifw-25-88) German Research Foundation (DFG) (URI: http://www.dfg.de/en/), grant/award no. BR 775/16: Infrastructure Priority Programme “International Ocean Drilling Programme (IODP³)” (SPP 527) (URI: https://www.dfg.de/de/aktuelles/neuigkeiten-themen/info-wissenschaft/2025/ifw-25-88) German Research Foundation (DFG) (URI: http://www.dfg.de/en/), grant/award no. BR 775/17: Infrastructure Priority Programme “International Ocean Drilling Programme (IODP³)” (SPP 527) (URI: https://www.dfg.de/de/aktuelles/neuigkeiten-themen/info-wissenschaft/2025/ifw-25-88) Coverage: MEDIAN LATITUDE: 9.453630 * MEDIAN LONGITUDE: -54.341780 * SOUTH-BOUND LATITUDE: 9.453430 * WEST-BOUND LONGITUDE: -54.341960 * NORTH-BOUND LATITUDE: 9.453830 * EAST-BOUND LONGITUDE: -54.341580 DATE/TIME START: 2003-01-15T14:30:00 * DATE/TIME END: 2003-01-22T15:30:00 MINIMUM DEPTH, sediment/rock: 1.45 m * MAXIMUM DEPTH, sediment/rock: 275.81 m Event(s): 207-1257A * LATITUDE: 9.453830 * LONGITUDE: -54.341960 * DATE/TIME START: 2003-01-15T14:30:00 * DATE/TIME END: 2003-01-19T22:45:00 * ELEVATION: -2951.0 m * Penetration: 284.7 m * Recovery: 216.05 m * LOCATION: North Atlantic Ocean * CAMPAIGN: Leg207 (URI: https://doi.org/10.2973/odp.proc.ir.207.2004) * BASIS: Joides Resolution (URI: https://www-odp.tamu.edu:443/resolutn.html) * METHOD/DEVICE: Drilling/drill rig (DRILL) * COMMENT: 31 core; 284.7 m cored; 0 m drilled; 75.9 % recovery 207-1257B * LATITUDE: 9.453630 * LONGITUDE: -54.341800 * DATE/TIME START: 2003-01-19T22:45:00 * DATE/TIME END: 2003-01-21T13:20:00 * ELEVATION: -2951.0 m * Penetration: 227.3 m * Recovery: 116.23 m * LOCATION: North Atlantic Ocean * CAMPAIGN: Leg207 (URI: https://doi.org/10.2973/odp.proc.ir.207.2004) * BASIS: Joides Resolution (URI: https://www-odp.tamu.edu:443/resolutn.html) * METHOD/DEVICE: Drilling/drill rig (DRILL) * COMMENT: 27 cores; 187.3 m cored; 40 m drilled; 62.1 % recovery 207-1257C * LATITUDE: 9.453430 * LONGITUDE: -54.341580 * DATE/TIME START: 2003-01-21T13:20:00 * DATE/TIME END: 2003-01-22T15:30:00 * ELEVATION: -2951.0 m * Penetration: 235.9 m * Recovery: 96.6 m * LOCATION: North Atlantic Ocean * CAMPAIGN: Leg207 (URI: https://doi.org/10.2973/odp.proc.ir.207.2004) * BASIS: Joides Resolution (URI: https://www-odp.tamu.edu:443/resolutn.html) * METHOD/DEVICE: Drilling/drill rig (DRILL) * COMMENT: 16 cores; 153.9 m cored; 82 m drilled; 62.8 % recovery Comment: 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 Parameter(s): Event label (Event) * PI: Böttcher, Michael Ernst (https://orcid.org/0000-0002-8877-0303, michael.boettcher@io-warnemuende.de) Date/Time of event (Date/Time) * PI: Böttcher, Michael Ernst (https://orcid.org/0000-0002-8877-0303, michael.boettcher@io-warnemuende.de) Latitude of event (Latitude) * PI: Böttcher, Michael Ernst (https://orcid.org/0000-0002-8877-0303, michael.boettcher@io-warnemuende.de) Longitude of event (Longitude) * PI: Böttcher, Michael Ernst (https://orcid.org/0000-0002-8877-0303, michael.boettcher@io-warnemuende.de) Sample code/label (Sample label) * PI: Böttcher, Michael Ernst (https://orcid.org/0000-0002-8877-0303, michael.boettcher@io-warnemuende.de) Depth, composite [mcd] (Depth comp) * PI: Böttcher, Michael Ernst (https://orcid.org/0000-0002-8877-0303, michael.boettcher@io-warnemuende.de) DEPTH, sediment/rock [m] (Depth sed) * GEOCODE * PI: Böttcher, Michael Ernst (https://orcid.org/0000-0002-8877-0303, michael.boettcher@io-warnemuende.de) * COMMENT: mbsf Unit (Unit) * PI: Böttcher, Michael Ernst (https://orcid.org/0000-0002-8877-0303, michael.boettcher@io-warnemuende.de) Iron, dithionite extractable [%] (FeD) * PI: Böttcher, Michael Ernst (https://orcid.org/0000-0002-8877-0303, michael.boettcher@io-warnemuende.de) * METHOD/DEVICE: Spectrophotometry after room temperature dithionite extraction * COMMENT: dwt. Iron, hydrochloric acid soluble [mg/kg] (Fe HCl acid soluble) * PI: Böttcher, Michael Ernst (https://orcid.org/0000-0002-8877-0303, michael.boettcher@io-warnemuende.de) * METHOD/DEVICE: Spectrophotometry after room temperature 0.5 M HCl extraction Sulfur, total reduced inorganic [%] (TRIS) * PI: Böttcher, Michael Ernst (https://orcid.org/0000-0002-8877-0303, michael.boettcher@io-warnemuende.de) * METHOD/DEVICE: Spectrophotometric method * COMMENT: dwt.; TRIS = AVS + CrS(II) Chromium reducible sulfur [%] (CRS) * PI: Böttcher, Michael Ernst (https://orcid.org/0000-0002-8877-0303, michael.boettcher@io-warnemuende.de) * METHOD/DEVICE: Spectrophotometric method * COMMENT: dwt.; chromium(II) reducible inorganic sulfur; essentially pyrite Acid volatile sulfides [mg/kg] (AVS) * PI: Böttcher, Michael Ernst (https://orcid.org/0000-0002-8877-0303, michael.boettcher@io-warnemuende.de) * METHOD/DEVICE: Spectrophotometric method Sulfur, organic [%] (S org) * PI: Böttcher, Michael Ernst (https://orcid.org/0000-0002-8877-0303, michael.boettcher@io-warnemuende.de) * METHOD/DEVICE: Elemental Analyser, Fison * COMMENT: dwt.; Kerogen-bond-organic sulfur); elemental analysis on washed and dried sediment residue after TRIS extraction License: Creative Commons Attribution 4.0 International (CC-BY-4.0) (URI: https://creativecommons.org/licenses/by/4.0/) Status: Curation Level: Enhanced curation (URI: https://wiki.pangaea.de/wiki/Curation_levels) * Processing Level: PANGAEA data processing level 3 (URI: https://wiki.pangaea.de/wiki/Processing_levels#PANGAEA_data_processing_level_3) Size: 195 data points */ Event Date/Time Latitude Longitude Sample label Depth comp [mcd] Depth sed [m] Unit FeD [%] Fe HCl acid soluble [mg/kg] TRIS [%] CRS [%] AVS [mg/kg] S org [%] 207-1257A 2003-01-15T14:30:00 9.4538 -54.3420 1257-A-1H-1 1.45 1.45 I 0.4370 30.0 0.00010 207-1257A 2003-01-15T14:30:00 9.4538 -54.3420 1257-A-2H-4 8.55 8.55 II 0.1210 23.1 0.03300 207-1257A 2003-01-15T14:30:00 9.4538 -54.3420 1257-A-3H-4 18.05 18.05 II 0.0910 17.2 0.02800 207-1257A 2003-01-15T14:30:00 9.4538 -54.3420 1257-A-4H-3 26.05 26.05 II 0.0940 18.7 0.04300 207-1257A 2003-01-15T14:30:00 9.4538 -54.3420 1257-A-5H-3 35.55 35.55 II 0.1490 23.3 0.01000 207-1257A 2003-01-15T14:30:00 9.4538 -54.3420 1257-A-6X-3 45.05 45.05 II 0.0590 12.6 0.01600 207-1257A 2003-01-15T14:30:00 9.4538 -54.3420 1257-A-7X-3 49.35 49.35 II 0.0740 13.4 0.00100 207-1257B 2003-01-19T22:45:00 9.4536 -54.3418 1257-B-3R-2 56.12 52.75 II 0.0570 13.2 0.00092 207-1257A 2003-01-15T14:30:00 9.4538 -54.3420 1257-A-8X-3 58.55 58.55 II 0.0886 13.3 0.00220 207-1257B 2003-01-19T22:45:00 9.4536 -54.3418 1257-B-4R-3 70.93 63.82 II 0.0950 15.5 0.00001 207-1257B 2003-01-19T22:45:00 9.4536 -54.3418 1257-B-5R-3 76.70 73.65 II 0.1040 15.0 0.00017 207-1257B 2003-01-19T22:45:00 9.4536 -54.3418 1257-B-7R-2 95.60 91.23 III 0.0750 15.0 0.00078 207-1257B 2003-01-19T22:45:00 9.4536 -54.3418 1257-B-8R-3 107.22 103.79 III 0.0860 14.1 207-1257B 2003-01-19T22:45:00 9.4536 -54.3418 1257-B-9R-3 113.79 112.02 III 0.1070 18.2 0.00088 207-1257A 2003-01-15T14:30:00 9.4538 -54.3420 1257-A-14X-4 117.70 117.70 III 0.1350 20.1 0.00085 207-1257B 2003-01-19T22:45:00 9.4536 -54.3418 1257-B-10R-3 125.68 123.10 III 0.1120 0.00080 207-1257A 2003-01-15T14:30:00 9.4538 -54.3420 1257-A-15X-5 128.49 128.90 III 0.1000 17.6 0.00110 207-1257B 2003-01-19T22:45:00 9.4536 -54.3418 1257-B-11R-4 135.28 132.70 III 0.1680 20.2 0.00160 207-1257B 2003-01-19T22:45:00 9.4536 -54.3418 1257-B-12R-3 143.27 140.60 III 0.0870 18.9 207-1257B 2003-01-19T22:45:00 9.4536 -54.3418 1257-B-13R-4 154.90 151.70 III 0.0480 8.3 0.39900 207-1257C 2003-01-21T13:20:00 9.4534 -54.3416 1257-C-8R-6 159.95 157.50 III 0.0470 8.6 0.01240 207-1257A 2003-01-15T14:30:00 9.4538 -54.3420 1257-A-18X-4 161.96 156.16 III 0.0546 9.9 0.25000 207-1257C 2003-01-21T13:20:00 9.4534 -54.3416 1257-C-9R-6 168.56 166.15 III 0.0480 10.6 0.20200 207-1257C 2003-01-21T13:20:00 9.4534 -54.3416 1257-C-10R-1 172.21 169.80 III 0.0440 7.8 0.35500 207-1257C 2003-01-21T13:20:00 9.4534 -54.3416 1257-C-12R-2 192.65 190.10 IV 0.0850 24.9 1.62000 1.62 31.0 0.45 207-1257C 2003-01-21T13:20:00 9.4534 -54.3416 1257-C-13R-2 202.75 200.20 IV 0.0313 6.5 0.47000 0.46 62.0 0.81 207-1257C 2003-01-21T13:20:00 9.4534 -54.3416 1257-C-15R-3 221.53 218.98 IV 0.0120 2.3 0.46000 0.45 106.0 0.95 207-1257B 2003-01-19T22:45:00 9.4536 -54.3418 1257-B-27R-3 228.94 225.30 V 0.1640 49.5 1.70000 1.70 1.0 0.00 207-1257C 2003-01-21T13:20:00 9.4534 -54.3416 1257-C-16R-6 237.50 233.87 V 0.1930 74.4 1.08000 1.08 1.0 0.00 207-1257A 2003-01-15T14:30:00 9.4538 -54.3420 1257-A-31X-1 281.61 275.81 V 0.2799 140.4 1.06000 1.06 1.0 0.00