https://doi.pangaea.de/10.1594/PANGAEA.997438Knoke, MelinaMelinaKnoke0000-0002-5270-8487Institute for Chemistry and Biology of the Marine Environment, Carl von Ossietzky Universität OldenburgDittmar, ThorstenThorstenDittmar0000-0002-3462-0107Institute for Chemistry and Biology of the Marine Environment, Carl von Ossietzky Universität OldenburgNiggemann, JuttaJuttaNiggemann0000-0003-1237-9233Institute for Chemistry and Biology of the Marine Environment, Carl von Ossietzky Universität OldenburgWagner, SashaSashaWagnerRensselaer Polytechnic InstituteFörster, OliverOliverFörsterInstitute for Chemistry and Biology of the Marine Environment, Carl von Ossietzky Universität OldenburgLeclerc, Ahlyia J.Ahlyia J.LeclercRensselaer Polytechnic InstituteUlber, Ina IdaIna IdaUlberInstitute for Chemistry and Biology of the Marine Environment, Carl von Ossietzky Universität OldenburgGünther, JanaJanaGüntherInstitute for Chemistry and Biology of the Marine Environment, Carl von Ossietzky Universität OldenburgSimon, HeikeHeikeSimonInstitute for Chemistry and Biology of the Marine Environment, Carl von Ossietzky Universität OldenburgSeidel, MichaelMichaelSeidel0000-0003-0934-1939Institute for Chemistry and Biology of the Marine Environment, Carl von Ossietzky Universität OldenburgPANGAEA2026Dissolved Black CarbonDissolved Organic MatterGuaymas Basinhydrothermal mobilizationIODPporewaterEvent labelLATITUDELONGITUDEDate/time startDate/time endSample commentSample typeDEPTH, sediment/rockDEPTH, waterBenzenepentacarboxylic acid, δ13CBenzenepentacarboxylic acid, δ13C, standard deviationBenzenehexacarboxylic acid, δ13CBenzenehexacarboxylic acid, δ13C, standard deviationCore drillingSolid‑phase extracted (SPE) of filtered seawater according to Green et al. 2014High 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]Exp385Joides ResolutionTeske, Andreas PAndreas PTeske2009-09-24T00:00:00/2019-11-04T05:30:00Dataset10.1594/PANGAEA.974052https://doi.pangaea.de/10.1594/PANGAEA.997437https://doi.pangaea.de/10.1594/PANGAEA.99743010.1016/j.gca.2025.06.00510.1002/lom3.1021910.3791/5392240 data pointstext/tab-separated-valuesCreative Commons Attribution 4.0 InternationalData access is restricted (moratorium, sensitive data, license constraints)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.-156.0667-111.219719.733327.5069Guaymas BasinKailua‑Kona, Hawaii, USADeutsche Forschungsgemeinschaft, Bonnhttps://doi.org/10.13039/501100001659447583997IODP GUAYMAS BASIN - The biogeochemistry of dissolved organic matter in hydrothermal Guaymas Basin sediments