Knoke Melina melina.knoke1@uni-oldenburg.de 0000-0002-5270-8487 Institute for Chemistry and Biology of the Marine Environment, Carl von Ossietzky Universität Oldenburg ICBM https://uol.de/en/icbm https://ror.org/0060pja03 Dittmar Thorsten thorsten.dittmar@uol.de 0000-0002-3462-0107 Institute for Chemistry and Biology of the Marine Environment, Carl von Ossietzky Universität Oldenburg ICBM https://uol.de/en/icbm https://ror.org/0060pja03 Niggemann Jutta jutta.niggemann@uni-oldenburg.de 0000-0003-1237-9233 Institute for Chemistry and Biology of the Marine Environment, Carl von Ossietzky Universität Oldenburg ICBM https://uol.de/en/icbm https://ror.org/0060pja03 Wagner Sasha wagnes3@rpi.edu Rensselaer Polytechnic Institute RPI https://www.rpi.edu https://ror.org/01rtyzb94 Förster Oliver oliver.foerster1@uol.de Institute for Chemistry and Biology of the Marine Environment, Carl von Ossietzky Universität Oldenburg ICBM https://uol.de/en/icbm https://ror.org/0060pja03 Leclerc Ahlyia J. leclea@rpi.edu Rensselaer Polytechnic Institute RPI https://www.rpi.edu https://ror.org/01rtyzb94 Ulber Ina Ida ina.ida.ulber@uol.de Institute for Chemistry and Biology of the Marine Environment, Carl von Ossietzky Universität Oldenburg ICBM https://uol.de/en/icbm https://ror.org/0060pja03 Günther Jana jana_guenther@web.de Institute for Chemistry and Biology of the Marine Environment, Carl von Ossietzky Universität Oldenburg ICBM https://uol.de/en/icbm https://ror.org/0060pja03 Simon Heike heike.simon@uol.de Institute for Chemistry and Biology of the Marine Environment, Carl von Ossietzky Universität Oldenburg ICBM https://uol.de/en/icbm https://ror.org/0060pja03 Seidel Michael m.seidel@uol.de 0000-0003-0934-1939 Institute for Chemistry and Biology of the Marine Environment, Carl von Ossietzky Universität Oldenburg ICBM https://uol.de/en/icbm https://ror.org/0060pja03 2026 Stable carbon isotope composition (δ¹³C) of dissolved black carbon in hot-water Soxhlet extracts [MS1.1] of Guaymas Basin deep subsurface sediments dataset https://doi.pangaea.de/10.1594/PANGAEA.997438 2026-09-29T10:19:34 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. Knoke Melina melina.knoke1@uni-oldenburg.de 0000-0002-5270-8487 Böning Philipp p.boening@icbm.de 0009-0003-7375-4567 Dittmar Thorsten thorsten.dittmar@uol.de 0000-0002-3462-0107 Friebe Matthias matthias.friebe@uol.de Gründken Eleonore eleonore.gruendken@uni-oldenburg.de Günther Jana jana_guenther@web.de Klaproth Katrin katrin.klaproth@uol.de Ulber Ina ina.ida.ulber@uni-oldenburg.de Simon Heike heike.simon@uol.de Seidel Michael m.seidel@uol.de 0000-0003-0934-1939 2025 Molecular composition of dissolved organic matter and biogeochemical parameters in porewater of Guaymas Basin (Gulf of California) deep subsurface sediments dataset bundled publication https://doi.org/10.1594/PANGAEA.974052 Knoke Melina melina.knoke1@uni-oldenburg.de 0000-0002-5270-8487 Dittmar Thorsten thorsten.dittmar@uol.de 0000-0002-3462-0107 Niggemann Jutta jutta.niggemann@uni-oldenburg.de 0000-0003-1237-9233 Wagner Sasha wagnes3@rpi.edu Förster Oliver oliver.foerster1@uol.de Leclerc Ahlyia J. leclea@rpi.edu Ulber Ina Ida ina.ida.ulber@uol.de Günther Jana jana_guenther@web.de Simon Heike heike.simon@uol.de Seidel Michael m.seidel@uol.de 0000-0003-0934-1939 2026 BPCA-derived dissolved black carbon concentrations in porewater and hot-water Soxhlet extracts of Guaymas Basin deep subsurface sediments dataset https://doi.pangaea.de/10.1594/PANGAEA.997437 Knoke Melina melina.knoke1@uni-oldenburg.de 0000-0002-5270-8487 Dittmar Thorsten thorsten.dittmar@uol.de 0000-0002-3462-0107 Niggemann Jutta jutta.niggemann@uni-oldenburg.de 0000-0003-1237-9233 Wagner Sasha wagnes3@rpi.edu Förster Oliver oliver.foerster1@uol.de Leclerc Ahlyia J. leclea@rpi.edu Ulber Ina Ida ina.ida.ulber@uol.de Günther Jana jana_guenther@web.de Simon Heike heike.simon@uol.de Seidel Michael m.seidel@uol.de 0000-0003-0934-1939 2026 Temperature-dependent changes in dissolved black carbon during heating of marine and terrestrial dissolved organic matter reference materials dataset https://doi.pangaea.de/10.1594/PANGAEA.997430 Knoke Melina melina.knoke1@uni-oldenburg.de 0000-0002-5270-8487 Dittmar Thorsten thorsten.dittmar@uol.de 0000-0002-3462-0107 Günther Jana jana_guenther@web.de Böning Philipp p.boening@icbm.de 0009-0003-7375-4567 Teske Andreas P teske@email.unc.edu Seidel Michael m.seidel@uol.de 0000-0003-0934-1939 2025 Hydrothermal mobilization and molecular transformations of dissolved organic matter from deep subsurface sediments journal article Geochimica et Cosmochimica Acta https://doi.org/10.1016/j.gca.2025.06.005 S0016703725003084 Wagner Sasha wagnes3@rpi.edu Brandes Jay jay.brandes@skio.uga.edu Goranov Aleksandar I Drake Travis W 0000-0002-7564-974X Spencer Robert G M 0000-0003-0777-0748 Stubbins Aron aron.stubbins@skio.uga.edu 0000-0002-3994-1946 2017 Online quantification and compound‐specific stable isotopic analysis of black carbon in environmental matrices via liquid chromatography‐isotope ratio mass spectrometry journal article Limnology and Oceanography-Methods 15(12) https://doi.org/10.1002/lom3.10219 995-1006 Wiedemeier Daniel B 0000-0001-8997-700X Lang Susan Q Gierga Merle Abiven Samuel 0000-0002-5663-0912 Bernasconi Stefano M stefano.bernasconi@erdw.ethz.ch 0000-0001-7672-8856 Früh-Green Gretchen L frueh-green@erdw.ethz.ch 0000-0003-0353-7842 Hajdas Irka hajdas@phys.ethz.ch 0000-0003-2373-2725 Hanke Ulrich M 0000-0002-4270-225X Hilf Michael D McIntyre Cameron P Scheider Maximilian P W Smittenberg Rienk H 0000-0001-5578-9916 Wacker Lukas wacker@phys.ethz.ch http://www.ams.ethz.ch/people/person-detail.html?persid=110331 0000-0002-8215-2678 Wiesenberg Guido L B guido.wiesenberg@geo.uzh.ch 0000-0003-2738-5775 Schmidt Michael W I 0000-0002-7227-0646 2016 Characterization, Quantification and Compound-specific Isotopic Analysis of Pyrogenic Carbon Using Benzene Polycarboxylic Acids (BPCA) journal article Journal of Visualized Experiments (111) https://doi.org/10.3791/53922 53922 -156.0667 -111.2197 19.7333 27.5069 -126.34113333333333 24.78091666666667 2009-09-24T00:00:00 2019-11-04T05:30:00 -2001.21 -674.0 irregular surface Deutsche Forschungsgemeinschaft, Bonn DFG http://www.dfg.de/en/ https://doi.org/10.13039/501100001659 447583997 IODP GUAYMAS BASIN - The biogeochemistry of dissolved organic matter in hydrothermal Guaymas Basin sediments https://uol.de/en/icbm/marine-geochemistry/research/dom-at-interfaces/iodp-guaymas-basin 385-U1547B 27.5069 -111.6789 Guaymas Basin -1732.22 2019-10-16T21:25:00 2019-10-20T05:00:00 Exp385 2019-09-16T00:00:00 2019-11-16T00:00:00 Joides Resolution https://www-odp.tamu.edu:443/resolutn.html Teske, Andreas P Lizarralde, Daniel Joides Resolution https://www-odp.tamu.edu:443/resolutn.html Core drilling CDRILL 50 (APC = 10, HLAP = 14, XCB = 26) 209.8 m 76.9 % 385-U1550B 27.2528 -111.5074 Guaymas Basin -2001.21 2019-10-28T20:20:00 2019-10-30T05:30:00 Exp385 2019-09-16T00:00:00 2019-11-16T00:00:00 Joides Resolution https://www-odp.tamu.edu:443/resolutn.html Teske, Andreas P Lizarralde, Daniel Joides Resolution https://www-odp.tamu.edu:443/resolutn.html Core drilling CDRILL 23 (APC = 12, HLAP = 5, XCB = 6) 174.2 m 92.3 % 385-U1551B 27.2064 -111.2197 Guaymas Basin -1843.9 2019-11-03T18:30:00 2019-11-04T05:30:00 Exp385 2019-09-16T00:00:00 2019-11-16T00:00:00 Joides Resolution https://www-odp.tamu.edu:443/resolutn.html Teske, Andreas P Lizarralde, Daniel Joides Resolution https://www-odp.tamu.edu:443/resolutn.html Core drilling CDRILL 6 (APC) 48.5 m 103.1 % NELHA_NEqPIW_2009 North Equatorial Pacific Intermediate Water 19.7333 -156.0667 Kailua‑Kona, Hawaii, USA -674.0 2009-09-24T00:00:00 Solid‑phase extracted (SPE) of filtered seawater according to Green et al. 2014 https://doi.org/10.1016/j.marchem.2014.01.012 NELHA_seasurface_2009 North Equatorial Pacific Intermediate Water 19.7333 -156.0667 Kailua‑Kona, Hawaii, USA -674.0 2009-09-24T00:00:00 Solid‑phase extracted (SPE) of filtered seawater according to Green et al. 2014 https://doi.org/10.1016/j.marchem.2014.01.012 40 CC-BY-4.0 Creative Commons Attribution 4.0 International https://creativecommons.org/licenses/by/4.0/ Event label Event Teske Andreas P teske@email.unc.edu Event LATITUDE Latitude http://en.wikipedia.org/wiki/ISO_6709 Teske Andreas P teske@email.unc.edu Latitude LONGITUDE Longitude http://en.wikipedia.org/wiki/ISO_6709 Teske Andreas P teske@email.unc.edu Longitude Date/time start Date/time start http://en.wikipedia.org/wiki/ISO_8601 Teske Andreas P teske@email.unc.edu Date/time start Date/time end Date/time end http://en.wikipedia.org/wiki/ISO_8601 Teske Andreas P teske@email.unc.edu Date/time end Sample comment Sample comment Teske Andreas P teske@email.unc.edu Sample comment Sample type Samp type Knoke Melina melina.knoke1@uni-oldenburg.de 0000-0002-5270-8487 porewater or Soxhlet extract with ultrapure water after Knoke et al. (2025) Samp type 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 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). Depth sed [m] DEPTH, water Depth water m depth http://purl.obolibrary.org/obo/PATO_0001595 water http://purl.obolibrary.org/obo/CHEBI_15377 Length L http://dbpedia.org/resource/Length Knoke Melina melina.knoke1@uni-oldenburg.de 0000-0002-5270-8487 Depth water [m] Benzenepentacarboxylic acid, δ13C B5CA δ13C ‰ PDB δ13C http://en.wikipedia.org/wiki/List_of_elements_by_stability_of_isotopes 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] Wagner Sasha wagnes3@rpi.edu 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‰ B5CA δ13C [‰ PDB] Benzenepentacarboxylic acid, δ13C, standard deviation B5CA δ13C std dev ± δ13C http://en.wikipedia.org/wiki/List_of_elements_by_stability_of_isotopes standard deviation std dev https://en.wikipedia.org/wiki/Standard_deviation 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] Wagner Sasha wagnes3@rpi.edu Standard deviation associated with the B5CA δ13C measurement. B5CA δ13C std dev [±] Benzenehexacarboxylic acid, δ13C B6CA δ13C ‰ PDB δ13C http://en.wikipedia.org/wiki/List_of_elements_by_stability_of_isotopes 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] Wagner Sasha wagnes3@rpi.edu 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‰. B6CA δ13C [‰ PDB] Benzenehexacarboxylic acid, δ13C, standard deviation B6CA δ13C std dev ± δ13C http://en.wikipedia.org/wiki/List_of_elements_by_stability_of_isotopes standard deviation std dev https://en.wikipedia.org/wiki/Standard_deviation 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] Wagner Sasha wagnes3@rpi.edu Standard deviation associated with the B5CA δ13C measurement. B6CA δ13C std dev [±] CurationLevelC Enhanced curation https://wiki.pangaea.de/wiki/Curation_levels Dissolved Black Carbon Dissolved Organic Matter Guaymas Basin hydrothermal mobilization IODP porewater author100500 author105046 author108860 author108861 author108862 author109456 author119059 author119060 author119061 author119201 author119204 author119205 author119206 author22858 author25758 author28319 author32411 author34251 author35350 author37338 author41473 author46053 author53785 author54503 author61337 author62955 author63589 author63595 author66063 author66584 author66585 author66591 author68043 author69917 author77559 author83898 award3467 basis5 campaign3390598 campaign47026 curlevel30 event3200129 event3200130 event3200131 event3507932 event3507940 funder213 geocode1 geocode1599 geocode1600 geocode1601 geocode1619 geocode8128 inst22987 inst461 journal10210 journal10609 journal6009 license21 method10903 method19616 method19619 param150986 param152460 param18011 param577530 param577531 param577532 param577533 param7059 pi119059 pi35350 pi68043 ref130980 ref141766 ref141770 refds974052 refds997430 refds997437 term1073089 term1073131 term22142 term2606205 term37764 term38263 term41056 term43863 term48527 term49036 term492 term51513 term76960 term78587 term78593 topotype6