Paul, Sophie Anna Luise (2025): Dissolved rare earth element and yttrium and manganese concentrations in pore water from the Pacific [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.982624, In: Paul, Sophie Anna Luise; Scholz, Florian; Fröhberg, Nico; Schmidt, Katja (2025): Neodymium isotope compositions, rare earth element concentrations and ancillary geochemical data for sediment cores, pore water and bottom seawater from the Atlantic and Pacific Oceans [dataset bundled publication]. PANGAEA, https://doi.org/10.1594/PANGAEA.981262
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Published: 2025-08-26 • DOI registered: 2025-09-24
Abstract:
The Neodymium (Nd) isotopic signature (εNd) has been widely used as a proxy to reconstruct past ocean circulation. Recently it has been increasingly questioned which archives can be reliably used to extract authigenic εNd used for the reconstruction of past ocean circulation and under which environmental conditions bottom seawater εNd are altered and the original water mass signature is overprinted. Pore waters of marine sediments are the key environment in which early diagenetic exchange processes between seawater-derived Nd and terrigenous solid phases take place. This dataset contains dissolved rare earth element and yttrium (REY) and manganese (Mn) concentrations of pore water and MUC overlying bottom water from the abyssal Pacific Ocean.
Samples were collected during cruises SO239 in 2015, SO240 in 2015, and SO268 in 2019. Pore waters were sampled from MUC liners and for some samples several liners were pooled to acquire sufficient volume for REY analyses. Sediments were centrifuged and the supernatant (i.e., the pore water) and the MUC bottom water were filtered through 0.2 µm pore size by different techniques (polyethersylfone (PES) syringe filters, cellulose acetate (CA) syringe filters, CA membrane filters using a water jet pump). These different filtration methods lead to comparable results. Pore water was preserved by acidification to ~ pH 1.8 with concentrated suprapure or ultrapure HCl.
REY and Mn were preconcentrated offline using a seaFAST (Elemental Scientific Inc., Nebraska, USA) with a 10 mL sample loop and using a NOBIAS PA-1 resin column. Samples were spiked with 100 ppt Tm and In to monitor yields and all REY were Tm corrected at the end of the data evaluation. Correction was usually within 5-15%. Preconcentrated samples were measured on a Thermo Fisher Element HR-ICP-MS (GEOMAR, Kiel) coupled to a CETAC Aridus 2 desolvating nebulizer for increased sensitivity and decreased oxide formation.
Project(s):
JPI Oceans - Ecological Aspects of Deep-Sea Mining (JPIO-MiningImpact)
Funding:
German Research Foundation (DFG), grant/award no. 458637508: Early diagenetic alteration of rare earth element and yttrium (REY) signals in marine sediments and impact on the use of REY as tracers in past and present marine environments
Coverage:
Median Latitude: 12.981316 * Median Longitude: -121.211723 * South-bound Latitude: 11.818830 * West-bound Longitude: -125.924517 * North-bound Latitude: 14.112867 * East-bound Longitude: -117.017317
Date/Time Start: 2015-03-30T10:35:00 * Date/Time End: 2019-05-08T06:52:59
Minimum DEPTH, sediment/rock: 0.00 m * Maximum DEPTH, sediment/rock: 0.29 m
Event(s):
SO239_66-1 * Latitude: 11.818830 * Longitude: -117.552170 * Date/Time: 2015-03-30T10:35:00 * Elevation: -4314.8 m * Location: North Pacific Ocean * Campaign: SO239 * Basis: Sonne_2 * Method/Device: Multicorer with television (TVMUC)
SO240_18-1 * Latitude: 13.118500 * Longitude: -118.127670 * Date/Time: 2015-05-12T17:48:00 * Elevation: -4319.2 m * Location: North Pacific Ocean * Campaign: SO240 * Basis: Sonne_2 * Method/Device: MultiCorer (MUC)
SO268/1_5-1 (MUC-01) * Latitude: 11.931200 * Longitude: -117.026467 * Date/Time: 2019-02-28T15:52:24 * Elevation: -4081.5 m * Location: Clarion-Clipperton Fraction Zone, North East Pacific Ocean * Campaign: SO268/1 * Basis: Sonne_2 * Method/Device: Multicorer with television (TVMUC) * Comment: GER Trial; TV-MUC
Parameter(s):
License:
Creative Commons Attribution 4.0 International (CC-BY-4.0)
Status:
Curation Level: Enhanced curation (CurationLevelC)
Size:
1431 data points