Knoke, Melina; Dittmar, Thorsten; Niggemann, Jutta; Wagner, Sasha; Förster, Oliver; Leclerc, Ahlyia J.; Ulber, Ina Ida; Günther, Jana; Simon, Heike; Seidel, Michael (2026): Stable carbon isotope composition (δ¹³C) of dissolved black carbon in hot-water Soxhlet extracts [MS1.1] of Guaymas Basin deep subsurface sediments [dataset]. PANGAEA, https://doi.pangaea.de/10.1594/PANGAEA.997438 (DOI registration in progress)
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Published: 2026-09-29
Abstract:
Dissolved black carbon (DBC) is a condensed aromatic fraction of dissolved organic matter (DOM) and an important component of the marine carbon cycle. Hydrothermal systems have been suggested as a potential source of DBC to the deep ocean, but the mobilization and origin of DBC in organic-rich hydrothermal sediments remain poorly constrained.
This dataset contains compound-specific stable carbon isotope compositions (δ13C) of benzene pentacarboxylic acid (B5CA), a BPCA oxidation product used to characterize dissolved black carbon (DBC), from hot-water Soxhlet extracts of dissolved organic matter (DOM) of deep subsurface sediments collected during IODP Expedition 385 in the Guaymas Basin (Gulf of California). DBC was characterized using benzene polycarboxylic acids (BPCAs). Benzene pentacarboxylic acid (B5CA) was isolated chromatographically for compound-specific stable carbon isotope analysis. The δ13C composition of B5CA was determined by high-performance liquid chromatography coupled to isotope ratio mass spectrometry (HPLC-IRMS) and is reported in per mil (‰) relative to Vienna Pee Dee Belemnite (VPDB). Only δ13C values of B5CA are reported because B6CA peaks could not be sufficiently separated from the analytical background for unambiguous carbon isotope measurements. The dataset contains B5CA δ13C values and the associated analytical variability.
Keyword(s):
Related to:
Knoke, Melina; Böning, Philipp; Dittmar, Thorsten; Friebe, Matthias; Gründken, Eleonore; Günther, Jana; Klaproth, Katrin; Ulber, Ina; Simon, Heike; Seidel, Michael (2025): Molecular composition of dissolved organic matter and biogeochemical parameters in porewater of Guaymas Basin (Gulf of California) deep subsurface sediments [dataset bundled publication]. PANGAEA, https://doi.org/10.1594/PANGAEA.974052
Knoke, Melina; Dittmar, Thorsten; Niggemann, Jutta; Wagner, Sasha; Förster, Oliver; Leclerc, Ahlyia J.; Ulber, Ina Ida; Günther, Jana; Simon, Heike; Seidel, Michael (2026): BPCA-derived dissolved black carbon concentrations in porewater and hot-water Soxhlet extracts of Guaymas Basin deep subsurface sediments [dataset]. PANGAEA, https://doi.pangaea.de/10.1594/PANGAEA.997437
Knoke, Melina; Dittmar, Thorsten; Niggemann, Jutta; Wagner, Sasha; Förster, Oliver; Leclerc, Ahlyia J.; Ulber, Ina Ida; Günther, Jana; Simon, Heike; Seidel, Michael (2026): Temperature-dependent changes in dissolved black carbon during heating of marine and terrestrial dissolved organic matter reference materials [dataset]. PANGAEA, https://doi.pangaea.de/10.1594/PANGAEA.997430
References:
Knoke, Melina; Dittmar, Thorsten; Günther, Jana; Böning, Philipp; Teske, Andreas P; Seidel, Michael (2025): Hydrothermal mobilization and molecular transformations of dissolved organic matter from deep subsurface sediments. Geochimica et Cosmochimica Acta, S0016703725003084, https://doi.org/10.1016/j.gca.2025.06.005
Wagner, Sasha; Brandes, Jay; Goranov, Aleksandar I; Drake, Travis W; Spencer, Robert G M; Stubbins, Aron (2017): Online quantification and compound‐specific stable isotopic analysis of black carbon in environmental matrices via liquid chromatography‐isotope ratio mass spectrometry. Limnology and Oceanography-Methods, 15(12), 995-1006, https://doi.org/10.1002/lom3.10219
Wiedemeier, Daniel B; Lang, Susan Q; Gierga, Merle; Abiven, Samuel; Bernasconi, Stefano M; Früh-Green, Gretchen L; Hajdas, Irka; Hanke, Ulrich M; Hilf, Michael D; McIntyre, Cameron P; Scheider, Maximilian P W; Smittenberg, Rienk H; Wacker, Lukas; Wiesenberg, Guido L B; Schmidt, Michael W I (2016): Characterization, Quantification and Compound-specific Isotopic Analysis of Pyrogenic Carbon Using Benzene Polycarboxylic Acids (BPCA). Journal of Visualized Experiments, (111), 53922, https://doi.org/10.3791/53922
Funding:
Deutsche Forschungsgemeinschaft, Bonn (DFG), grant/award no. 447583997: IODP GUAYMAS BASIN - The biogeochemistry of dissolved organic matter in hydrothermal Guaymas Basin sediments
Coverage:
Median Latitude: 24.780917 * Median Longitude: -126.341133 * South-bound Latitude: 19.733300 * West-bound Longitude: -156.066700 * North-bound Latitude: 27.506900 * East-bound Longitude: -111.219700
Date/Time Start: 2009-09-24T00:00:00 * Date/Time End: 2019-11-04T05:30:00
Minimum Elevation: -2001.2 m * Maximum Elevation: -674.0 m
Event(s):
385-U1547B * Latitude: 27.506900 * Longitude: -111.678900 * Date/Time Start: 2019-10-16T21:25:00 * Date/Time End: 2019-10-20T05:00:00 * Elevation: -1732.2 m * Number of cores: 50 (APC = 10, HLAP = 14, XCB = 26) * Penetration: 209.8 m * Recovery: 76.9 % * Location: Guaymas Basin * Campaign: Exp385 * Basis: Joides Resolution * Method/Device: Core drilling (CDRILL)
385-U1550B * Latitude: 27.252800 * Longitude: -111.507400 * Date/Time Start: 2019-10-28T20:20:00 * Date/Time End: 2019-10-30T05:30:00 * Elevation: -2001.2 m * Number of cores: 23 (APC = 12, HLAP = 5, XCB = 6) * Penetration: 174.2 m * Recovery: 92.3 % * Location: Guaymas Basin * Campaign: Exp385 * Basis: Joides Resolution * Method/Device: Core drilling (CDRILL)
385-U1551B * Latitude: 27.206400 * Longitude: -111.219700 * Date/Time Start: 2019-11-03T18:30:00 * Date/Time End: 2019-11-04T05:30:00 * Elevation: -1843.9 m * Number of cores: 6 (APC) * Penetration: 48.5 m * Recovery: 103.1 % * Location: Guaymas Basin * Campaign: Exp385 * Basis: Joides Resolution * Method/Device: Core drilling (CDRILL)
Parameter(s):
| # | Name | Short Name | Unit | Principal Investigator | Method/Device | Comment |
|---|---|---|---|---|---|---|
| 1 | Event label | Event | Teske, Andreas P | |||
| 2 | LATITUDE | Latitude | Teske, Andreas P | Geocode | ||
| 3 | LONGITUDE | Longitude | Teske, Andreas P | Geocode | ||
| 4 | Date/time start | Date/time start | Teske, Andreas P | |||
| 5 | Date/time end | Date/time end | Teske, Andreas P | |||
| 6 | Sample comment | Sample comment | Teske, Andreas P | |||
| 7 | Sample type | Samp type | Knoke, Melina | porewater or Soxhlet extract with ultrapure water after Knoke et al. (2025) | ||
| 8 | DEPTH, sediment/rock | Depth sed | m | Geocode – Depth of sediment and water column. For IODP samples, depth refers to sediment depth below seafloor. For NELHA samples, depth refers to water sampling depth (21 m for surface water and 674 m for NEqPIW). | ||
| 9 | DEPTH, water | Depth water | m | Knoke, Melina | Geocode | |
| 10 | Benzenepentacarboxylic acid, δ13C | B5CA δ13C | ‰ PDB | Wagner, Sasha | High Performance Liquid Chromatograph (HPLC), Thermo Fisher Scientific, Dionex Ultimate 3000; coupled with Isotope ratio mass spectrometer (IRMS), Thermo Fisher Scientific, Delta V Advantage [LC Isolink interface] | Compound-specific stable carbon isotope composition of B5CA from hot-water extractable sediment SPE-DOM. BPCAs were isolated by HPLC after Wiedemeier et al. (2016) and δ13C was measured according to Wagner et al. (2019). Values are reported relative to VPDB. Analytical error of corrected δ13C values was <0.5‰ |
| 11 | Benzenepentacarboxylic acid, δ13C, standard deviation | B5CA δ13C std dev | ± | Wagner, Sasha | High Performance Liquid Chromatograph (HPLC), Thermo Fisher Scientific, Dionex Ultimate 3000; coupled with Isotope ratio mass spectrometer (IRMS), Thermo Fisher Scientific, Delta V Advantage [LC Isolink interface] | Standard deviation associated with the B5CA δ13C measurement. |
| 12 | Benzenehexacarboxylic acid, δ13C | B6CA δ13C | ‰ PDB | Wagner, Sasha | High Performance Liquid Chromatograph (HPLC), Thermo Fisher Scientific, Dionex Ultimate 3000; coupled with Isotope ratio mass spectrometer (IRMS), Thermo Fisher Scientific, Delta V Advantage [LC Isolink interface] | Compound-specific stable carbon isotope composition of B5CA from hot-water extractable sediment SPE-DOM. BPCAs were isolated by HPLC after Wiedemeier et al. (2016) and δ13C was measured according to Wagner et al. (2019). Values are reported relative to VPDB. Analytical error of corrected δ13C values was <0.5‰. |
| 13 | Benzenehexacarboxylic acid, δ13C, standard deviation | B6CA δ13C std dev | ± | Wagner, Sasha | High Performance Liquid Chromatograph (HPLC), Thermo Fisher Scientific, Dionex Ultimate 3000; coupled with Isotope ratio mass spectrometer (IRMS), Thermo Fisher Scientific, Delta V Advantage [LC Isolink interface] | Standard deviation associated with the B5CA δ13C measurement. |
License:
Creative Commons Attribution 4.0 International (CC-BY-4.0) (License comes into effect after moratorium ends)
Status:
Curation Level: Enhanced curation (CurationLevelC)
Size:
40 data points