Böttcher, Michael Ernst; Brumsack, Hans-Jürgen (2026): Iron and sulfur geochemistry of deep biosphere sediments from ODP Leg 207 site 1261 [dataset]. PANGAEA, https://doi.pangaea.de/10.1594/PANGAEA.993271 (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)
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Published: 2026-03-27
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):
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):
Funding:
German Research Foundation (DFG), grant/award no. BO 1584/2: Infrastructure Priority Programme “International Ocean Drilling Programme (IODP³)” (SPP 527)
German Research Foundation (DFG), grant/award no. BR 775/16: Infrastructure Priority Programme “International Ocean Drilling Programme (IODP³)” (SPP 527)
German Research Foundation (DFG), grant/award no. BR 775/17: Infrastructure Priority Programme “International Ocean Drilling Programme (IODP³)” (SPP 527)
Coverage:
Median Latitude: 9.048620 * Median Longitude: -54.317390 * South-bound Latitude: 9.048610 * West-bound Longitude: -54.317480 * North-bound Latitude: 9.048630 * East-bound Longitude: -54.317300
Date/Time Start: 2003-02-16T15:47:00 * Date/Time End: 2003-02-23T00:35:00
Minimum Elevation: -1899.7 m * Maximum Elevation: -1899.7 m
Event(s):
207-1261A * Latitude: 9.048610 * Longitude: -54.317300 * Date/Time Start: 2003-02-16T15:47:00 * Date/Time End: 2003-02-19T11:40:00 * Elevation: -1899.7 m * Penetration: 669.5 m * Recovery: 355.42 m * Location: Walvis Ridge, Southeast Atlantic Ocean * Campaign: Leg207 * Basis: Joides Resolution * Method/Device: Drilling/drill rig (DRILL) * Comment: 51 core; 484 m cored; 185.5 m drilled; 73.4 % recovery
207-1261B * Latitude: 9.048630 * Longitude: -54.317480 * Date/Time Start: 2003-02-19T11:40:00 * Date/Time End: 2003-02-23T00:35:00 * Elevation: -1899.7 m * Penetration: 674.1 m * Recovery: 92.49 m * Location: Walvis Ridge, Southeast Atlantic Ocean * Campaign: Leg207 * Basis: Joides Resolution * Method/Device: Drilling/drill rig (DRILL) * Comment: 16 cores; 148.8 m cored; 525.3 m drilled; 62.2 % 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):
| # | Name | Short Name | Unit | Principal Investigator | Method/Device | Comment |
|---|---|---|---|---|---|---|
| 1 | Event label | Event | Böttcher, Michael Ernst | |||
| 2 | Date/Time of event | Date/Time | Böttcher, Michael Ernst | |||
| 3 | Latitude of event | Latitude | Böttcher, Michael Ernst | |||
| 4 | Longitude of event | Longitude | Böttcher, Michael Ernst | |||
| 5 | Sample code/label | Sample label | Böttcher, Michael Ernst | |||
| 6 | Unit | Unit | Böttcher, Michael Ernst | |||
| 7 | Depth, composite | Depth comp | mcd | Böttcher, Michael Ernst | ||
| 8 | Iron, dithionite extractable | FeD | % | Böttcher, Michael Ernst | Spectrophotometry after room temperature dithionite extraction | dwt. |
| 9 | Iron, hydrochloric acid soluble | Fe HCl acid soluble | mg/kg | Böttcher, Michael Ernst | Spectrophotometry after room temperature 0.5 M HCl extraction | |
| 10 | Sulfur, total reduced inorganic | TRIS | % | Böttcher, Michael Ernst | Spectrophotometric method | dwt.; TRIS = AVS + CrS(II) |
| 11 | Chromium reducible sulfur | CRS | % | Böttcher, Michael Ernst | Spectrophotometric method | dwt.; chromium(II) reducible inorganic sulfur; essentially pyrite |
| 12 | Acid volatile sulfides | AVS | mg/kg | Böttcher, Michael Ernst | Spectrophotometric method | |
| 13 | Sulfur, organic | S org | % | Böttcher, Michael Ernst | Elemental Analyser, Fison | 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)
Status:
Curation Level: Enhanced curation (CurationLevelC) * Processing Level: PANGAEA data processing level 3 (ProcLevel3)
Size:
137 data points
Data
| 1 Event | 2 Date/Time | 3 Latitude | 4 Longitude | 5 Sample label | 6 Unit | 7 Depth comp [mcd] | 8 FeD [%] | 9 Fe HCl acid soluble [mg/kg] | 10 TRIS [%] | 11 CRS [%] | 12 AVS [mg/kg] | 13 S org [%] |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 207-1261A | 2003-02-16T15:47:00 | 9.0486 | -54.3173 | 1261-A-1R-2 | I | 2.95 | 0.74 | 85.4 | 0.047 | |||
| 207-1261A | 2003-02-16T15:47:00 | 9.0486 | -54.3173 | 1261-A-3R-1 | 14.54 | 0.39 | 73.0 | 0.071 | ||||
| 207-1261A | 2003-02-16T15:47:00 | 9.0486 | -54.3173 | 1261-A-4R-1 | 71.15 | 0.69 | 158.2 | 0.160 | ||||
| 207-1261A | 2003-02-16T15:47:00 | 9.0486 | -54.3173 | 1261-A-5R-4 | 137.30 | 0.88 | 231.0 | 0.163 | ||||
| 207-1261A | 2003-02-16T15:47:00 | 9.0486 | -54.3173 | 1261-A-6R-5 | 196.50 | 0.92 | 157.0 | 0.128 | ||||
| 207-1261A | 2003-02-16T15:47:00 | 9.0486 | -54.3173 | 1261-A-7R-3 | 241.30 | 0.54 | 252.0 | 0.044 | ||||
| 207-1261A | 2003-02-16T15:47:00 | 9.0486 | -54.3173 | 1261-A-8R-3 | 250.90 | 0.97 | 238.0 | 0.177 | ||||
| 207-1261A | 2003-02-16T15:47:00 | 9.0486 | -54.3173 | 1261-A-10R-3 | 270.20 | 0.51 | 228.0 | 0.053 | ||||
| 207-1261A | 2003-02-16T15:47:00 | 9.0486 | -54.3173 | 1261-A-12R-5 | 291.10 | 0.43 | 302.0 | 0.040 | ||||
| 207-1261A | 2003-02-16T15:47:00 | 9.0486 | -54.3173 | 1261-A-14R-6 | 312.80 | 0.63 | 195.0 | 0.324 | ||||
| 207-1261A | 2003-02-16T15:47:00 | 9.0486 | -54.3173 | 1261-A-16R-3 | 328.00 | 0.14 | 23.7 | 0.025 | ||||
| 207-1261A | 2003-02-16T15:47:00 | 9.0486 | -54.3173 | 1261-A-18R-5 | I | 350.29 | 0.30 | 71.0 | 0.091 | |||
| 207-1261A | 2003-02-16T15:47:00 | 9.0486 | -54.3173 | 1261-A-20R-6 | II | 370.90 | 0.14 | 33.0 | 0.028 | |||
| 207-1261A | 2003-02-16T15:47:00 | 9.0486 | -54.3173 | 1261-A-22R-3 | 384.86 | 0.09 | 27.0 | 0.009 | ||||
| 207-1261A | 2003-02-16T15:47:00 | 9.0486 | -54.3173 | 1261-A-25R-4 | 414.64 | 0.10 | 33.0 | 0.003 | ||||
| 207-1261A | 2003-02-16T15:47:00 | 9.0486 | -54.3173 | 1261-A-28R-3 | 442.98 | 0.10 | 29.0 | 0.008 | ||||
| 207-1261A | 2003-02-16T15:47:00 | 9.0486 | -54.3173 | 1261-A-32R-5 | 484.60 | 0.11 | 32.1 | 0.010 | ||||
| 207-1261A | 2003-02-16T15:47:00 | 9.0486 | -54.3173 | 1261-A-35R-5 | III | 512.10 | 18.4 | 0.225 | ||||
| 207-1261A | 2003-02-16T15:47:00 | 9.0486 | -54.3173 | 1261-A-37R-1 | 526.65 | 0.08 | 23.3 | 0.064 | ||||
| 207-1261A | 2003-02-16T15:47:00 | 9.0486 | -54.3173 | 1261-A-39R-1 | III | 545.95 | 0.04 | 6.0 | 0.192 | |||
| 207-1261A | 2003-02-16T15:47:00 | 9.0486 | -54.3173 | 1261-A-45R-3 | IV | 606.31 | 0.02 | 3.0 | 0.660 | 0.64 | 168.0 | 1.39 |
| 207-1261B | 2003-02-19T11:40:00 | 9.0486 | -54.3175 | 1261-B-11R-2 | 612.38 | 3.6 | 0.870 | 0.84 | 260.0 | 1.77 | ||
| 207-1261A | 2003-02-16T15:47:00 | 9.0486 | -54.3173 | 1261-A-48R-5 | 635.37 | 0.02 | 4.3 | 1.520 | 1.52 | 10.4 | 1.88 | |
| 207-1261B | 2003-02-19T11:40:00 | 9.0486 | -54.3175 | 1261-B-14R-2 | IV | 647.25 | 0.03 | 6.9 | 0.880 | 0.88 | 66.0 | 1.42 |