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Bibliographic Details
Main Authors:	Repasch, Marisa N, Vieth-Hillebrand, Andrea, Sachse, Dirk, Scheingross, Joel S, Hovius, Niels
Format:	Dataset Open Access
Language:	en
Published:	PANGAEA 2020
Subjects:	AR15DS-024-S; AR15DS-027; AR15DS-038-S-10; AR15DS-045-S; AR15DS-046-S-5; AR15DS-048-S-30; AR15DS-048-S-60; AR15DS-052-S; AR15DS-057; AR15DS-057-S; AR15DS-060-S; AR15DS-063-S; AR15DS-38-S-5; AR16JS-01; AR16JS-08; AR16JS-10; AR16JS-10-A; AR17JS10; AR17MR-18; AR17MR-29; AR17MR-38; AR17MR-48; AR17MR-49; AR17MR-54; AR17MR-55; Average chain length; Bermejo at Rio Paraguay; Biomarker; Carbon, organic, total; Carbon Preference Index; Compound-specific Isotopes; Date/Time of event; DEPTH, sediment/rock; Distance; El Colgado; El Colorado; Embarcacion; Event label; Gas chromatography (Agilent GC 7890-A) with flame ionization detection (FID) coupled to a single quadrupole mass spectrometer (MS 5975-C); Gas chromatography-combustion-isotope ratio mass spectrometry (GC-C-IRMS) with helium as a carrier gas (Agilent 7890N, ThermoFisher Delta V Plus); Gas chromatography - Isotope ratio mass spectrometer (GC-IRMS) (ThermoFisher Scientific Trace GC 1310) coupled to a Delta-V isotope ratio mass spectrometer; Grl Mansilla; Latitude of event; Location of event; Longitude of event; MR18-PLV-LL; MR18-SZ-LL; MR18-SZ-Soil; n-Alkane C17, per unit sediment mass; n-Alkane C18, per unit sediment mass; n-Alkane C19, per unit sediment mass; n-Alkane C20, per unit sediment mass; n-Alkane C21, per unit sediment mass; n-Alkane C22, per unit sediment mass; n-Alkane C23, per unit sediment mass; n-Alkane C24, per unit sediment mass; n-Alkane C25, per unit sediment mass; n-Alkane C26, per unit sediment mass; n-Alkane C27, per unit sediment mass; n-Alkane C27, δ13C; n-Alkane C27, δ13C, standard deviation; n-Alkane C27, δD; n-Alkane C27, δD, standard deviation; n-Alkane C28, per unit sediment mass; n-Alkane C29, per unit sediment mass; n-Alkane C29, δ13C; n-Alkane C29, δ13C, standard deviation; n-Alkane C29, δD; n-Alkane C29, δD, standard deviation; n-Alkane C30, per unit sediment mass; n-Alkane C31, per unit sediment mass; n-Alkane C31, δ13C; n-Alkane C31, δ13C, standard deviation; n-Alkane C31, δD; n-Alkane C31, δD, standard deviation; n-Alkane C32, per unit sediment mass; n-Alkane C33, per unit sediment mass; n-Alkane C33, δ13C; n-Alkane C33, δ13C, standard deviation; n-Alkane C33, δD; n-Alkane C33, δD, standard deviation; n-Alkane C34, per unit sediment mass; n-Alkane C35, per unit sediment mass; n-Alkane C36, per unit sediment mass; n-Alkane C37, per unit sediment mass; n-alkanes; n-Alkanes, (C31+C33)/(C27+C29) ratio; n-Alkanes, sum, per unit mass total organic carbon; n-alkanes, total, per unit sediment mass; n-Alkanes, total mass; Pozo Sarmiento; Puente Lavalle; Puerto lavalle; Reserva Natural Formosa; river sediment; RSF-RB confluence; Sample ID; Sample mass; Sample type; Sauzalito; ST15-52; Villa Rio Bermejito; δ13C, organic carbon
Online Access:	https://doi.org/10.1594/PANGAEA.925616
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Endmember samples were collected and analyzed to determine the sources of organic material in the river suspended sediment. Endmembers include soil, leaf litter, and floodplain sediment. Soil and leaf litter samples were collected using an ethanol-cleaned hand trowel. Floodplain sediment samples were collected using an Edelman-type hand auger drilled down to a maximum of ~5 m. Samples were stored in paper bags, and then oven-dried at 40°C. n-alkanes were identified and quantified using an Agilent gas chromatograph (GC 7890-A) with flame ionization detection (FID) coupled to a single quadrupole mass spectrometer (MS 5975-C). We quantified n-alkane concentrations relative to the peak response of the internal standard, and then normalized the abundance to the sediment mass. We measured n-alkane d13C via GC-C-IRMS (gas chromatography/combustion/isotope-ratio mass spectrometry) with helium as a carrier gas (Agilent 7890N, ThermoFisher Delta V Plus). All compounds were measured in triplicate with a standard deviation of =0.5‰. Measurement quality was checked regularly by measuring n-alkane standards (nC15, nC20, nC25) with known isotopic composition (provided by Campro Scientific, Germany). d13C values were normalized to the Vienna Pee Dee Belemnite (VPDB) standard. We measured n-alkane d2H via GC-IRMS using a ThermoFisher Scientific Trace GC 1310 coupled to a Delta-V isotope ratio mass spectrometer. All d2H measurements were made in duplicate, and measurement quality was checked with d2H values were normalized to the Vienna Standard Mean Ocean Water (VSMOW) standard using an n-alkane standard mix with known d2H values (nC16 - nC30, from A. Schimmelman/Indiana University).

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