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Bertassoli Junior, Dailson José; Häggi, Christoph; Chiessi, Cristiano Mazur; Schefuß, Enno; Hefter, Jens; Akabane, Thomas K (2022): GDGT and n-alkane isotopic compositions in suspended sediments samples of the Amazon River Basin [dataset bundled publication]. PANGAEA, https://doi.org/10.1594/PANGAEA.945184

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Published: 2022-06-08 • DOI registered: 2022-07-27

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Abstract:
Lipid biomarkers have been extensively used to reconstruct paleoenvironmental conditions. However, the entrainment of local compounds from source to sink may complicate interpretations. Here we present: (i) glycerol dialkyl glycerol tetraether (GDGT) distributions from the Amazon River and its main tributaries (i.e. Japurá, Içá, Juruá, Jutaí, Madeira, Solimões, Negro, Tapajós and Purus); and (ii) GDGT distributions and n-alkane isotopic compositions of soils and sediments from the Xingu River, a large clearwater River in eastern Amazonia. Our study aimed at understanding the processes and patterns related to distinct GDGT distributions and n-alkane isotopic signatures across lowland Amazonia. Suspended sediment samples from the Amazon Basin were obtained during the low-water season of 2015. Soil and suspended sediment samples from the Xingu Basin were obtained during the low- and high-water seasons of 2011, 2012, 2016 and 2017. Riverbed material was obtained using a Van Veen bottom sampler. Suspended material was concentrated using a Merck Millipore Ultrafiltration system equipped with Pellicon 2 Ultrafiltration cassettes (0.45 μm, 0.5 m2) after pumping up to 100 L of water from 60% of the total water column.
Keyword(s):
Amazon; Amazon River; Biomarkers; BIT index; Carbon isotopes; Compound-specific Isotopes; GDGTs; hydrogen and carbon isotopes; Hydrogen isotopes; Hydrogen stable isotopes; Leaf wax; n-alkane; n-alkanes; Suspended particulate matter; Xingu River
Related to:
Bertassoli Junior, Dailson José; Häggi, Christoph; Chiessi, Cristiano Mazur; Schefuß, Enno; Hefter, Jens; Akabane, Thomas K; Sawakuchi, André Oliveira (2022): Controls on the distributions of GDGTs and n-alkane isotopic compositions in sediments of the Amazon River Basin. Chemical Geology, 594, 120777, https://doi.org/10.1016/j.chemgeo.2022.120777
Häggi, Christoph; Schefuß, Enno; Sawakuchi, André Oliveira; Chiessi, Cristiano Mazur; Mulitza, Stefan; Bertassoli Junior, Dailson José; Hefter, Jens; Zabel, Matthias; Baker, Paul A; Schouten, Stefan (2019): Modern and late Pleistocene particulate organic carbon transport by the Amazon River: Insights from long-chain alkyl diols. Geochimica et Cosmochimica Acta, 262, 1-19, https://doi.org/10.1016/j.gca.2019.07.018
Funding:
German Research Foundation (DFG), grant/award no. 49926684: EXC 309: The Ocean in the Earth System
Coverage:
Median Latitude: -2.929211 * Median Longitude: -55.631126 * South-bound Latitude: -3.874000 * West-bound Longitude: -68.075000 * North-bound Latitude: -1.575000 * East-bound Longitude: -51.689000
Date/Time Start: 2011-10-20T00:00:00 * Date/Time End: 2017-05-17T00:00:00
License:
Creative Commons Attribution 4.0 International (CC-BY-4.0)
Size:
2 datasets

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Datasets listed in this bundled publication

  1. Bertassoli Junior, DJ; Häggi, C; Chiessi, CM et al. (2022): GDGT and n-alkane isotopic compositions in suspended sediments samples of the Amazon River Basin. https://doi.org/10.1594/PANGAEA.945138
  2. Bertassoli Junior, DJ; Häggi, C; Chiessi, CM et al. (2022): GDGT fractional abundances and indices, n-Alkane concentrations, and isotopic signatures from soils, riverbed and suspended sediments samples from the Xingu River Basin. https://doi.org/10.1594/PANGAEA.945178