https://doi.pangaea.de/10.1594/PANGAEA.997437Knoke, 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 code/labelReplicateSample typeDEPTH, sediment/rockTemperature, in rock/sedimentBenzenepentacarboxylic acidBenzenehexacarboxylic acidBenzenepentacarboxylic acid/Benzenehexacarboxylic acid ratioBlack carbon, dissolvedBlack carbon, dissolved/carbon, organic, dissolved ratioBlack carbon, dissolved per unit mass total organic carbonCore drillingSubmersible AlvinDSDP/ODP/IODP sample designationBenzene polycarboxylic acid method (BPCA); measured with Ultra Performance Liquid Chromatograph (UPLC), Waters Corporation, ACQUITYCalculatedExp385Joides ResolutionTeske, Andreas PAndreas PTeske2016-12-15T15:46:29/2019-11-04T05:30:00Dataset10.1594/PANGAEA.974052https://doi.pangaea.de/10.1594/PANGAEA.997438https://doi.pangaea.de/10.1594/PANGAEA.99743010.1016/j.orggeochem.2008.01.01510.1016/j.gca.2025.06.00510.3389/feart.2015.0006310.14379/iodp.proc.385.20211519 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 benzene polycarboxylic acid (BPCA)-derived dissolved black carbon (DBC) concentrations from porewater and water-extractable hot-water Soxhlet extracts of deep subsurface sediments collected during IODP Expedition 385 in the Guaymas Basin (Gulf of California). Sample handling and the preparation and characterization of porewater and hot-water Soxhlet extracts have been described previously (Teske et al., 2021; Knoke et al., 2025). DBC was quantified using the benzene polycarboxylic acid method. Methanolic SPE-DOM extracts were oxidized with nitric acid, and the resulting BPCAs were quantified by ultra-performance liquid chromatography (UPLC). Benzene pentacarboxylic acid (B5CA) and benzene hexacarboxylic acid (B6CA) were considered for DBC quantification, and DBC concentrations were calculated according to Stubbins et al. (2015). The dataset includes B5CA and B6CA concentrations, B6CA/B5CA ratios, calculated DBC concentrations, and operationally defined hot-water-extractable DBC normalized to sediment total organic carbon content.-111.88900999999998-111.2197350000000127.206386666727.6372083333Guaymas BasinDeutsche Forschungsgemeinschaft, Bonnhttps://doi.org/10.13039/501100001659447583997IODP GUAYMAS BASIN - The biogeochemistry of dissolved organic matter in hydrothermal Guaymas Basin sediments