PANGAEA_993243 Iron and sulfur geochemistry of deep biosphere sediments from ODP Leg 207 site 1257 Böttcher, Michael Ernst; Brumsack, Hans-Jürgen Iron and sulfur geochemistry of deep biosphere sediments from ODP Leg 207 site 1257 2026-03-27 PANGAEA Dataset https://doi.pangaea.de/10.1594/PANGAEA.993243 Investigator Michael Ernst Böttcher michael.boettcher@io-warnemuende.de Earth Science Event label Date/Time of event Latitude of event Longitude of event Sample code/label Depth, composite DEPTH, sediment/rock Unit Iron, dithionite extractable Iron, hydrochloric acid soluble Sulfur, total reduced inorganic Chromium reducible sulfur Acid volatile sulfides Sulfur, organic geoscientificInformation 207-1257A 207-1257B 207-1257C black shale deep biosphere Demerara Rise Drilling/drill rig iron content iron species Leg207 ODP 207 organic sulfur sulfur content Sulfur species Spectrophotometry after room temperature dithionite extraction Spectrophotometry after room temperature 0.5 M HCl extraction Spectrophotometric method Elemental Analyser, Fison Joides Resolution 2003-01-15 2003-01-22 Complete 9.45343 9.45383 -54.34195999999997 -54.34158000000002 1.45 m (DEPTH, sediment/rock) 275.81 m (DEPTH, sediment/rock) IODP3 International Ocean Drilling Programme 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 195 data points text/tab-separated-values 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

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. ** For all details see the full metadata description at "https://doi.pangaea.de/10.1594/PANGAEA.993243"! ** 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

https://doi.org/10.1016/j.palaeo.2008.11.005 Paleo-redox conditions during OAE 2 reflected in Demerara Rise sediment geochemistry (ODP Leg 207) https://doi.org/10.2973/odp.proc.ir.207.2004 Leg207 https://doi.org/10.2973/odp.proc.sr.207.108.2006 Sulfur-iron-carbon geochemistry in sediments of the Demerara Rise https://iodp3.org/ IODP3 https://www-odp.tamu.edu:443/resolutn.html Joides Resolution PANGAEA_993242 DIF 9.4 2026-03-27 2026-03-27