cometadata/datacite-titles-descriptions-related-identifiers huggingface dataset:
DOI: 10.1594/pangaea.981265
title: Neodymium isotope compositions of bottom seawater from the Atlantic and Pacific Oceans

description: 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 Nd isotope compositions of bottom seawater from the abyssal Atlantic and Pacific Oceans, focusing on the behavior of the Nd isotope composition in oxic deep-sea sediments during early diagenesis.Samples for the Atlantic were collected during cruise MSM96 in 2020 and for the Pacific during cruises SO268 in 2019 and SO295 in 2022. Seawater samples were taken with NISKIN or GoFlo bottles attached to a CTD water sampling carousel or a bottom water sampler. Samples were filtered using 0.8/0.2 µm Acropak capsule filters for the dissolved fraction (&lt;0.2 µm). Samples from the Atlantic were subsequently filtered through either 0.015 µm nuclepore membrane filters (Whatman; under gas pressure) for the soluble (&lt;0.015 µm) fraction or ultrafiltered using a Millipore Pellicon 2 tangential flow ultrafiltration system with a 10 kDa nominal molecular weight cutoff (truly dissolved fraction &lt;10 kDa). Samples for the Pacific were additionally pooled in the lab to combine several depths of the bottom water sampler for sufficient volume. Seawater was preserved by acidification to ~ pH 1.8 with concentrated ultrapure HCl.Neodymium was purified using first BIORAD AG50W-X8 resin, followed by Eichrom Ln-spec resin. Samples were measured by MC-ICP-MS.
DOI: 10.1594/pangaea.982937
title: Dissolved rare earth element and yttrium and manganese concentrations in pore water from sediment cores from the Atlantic (MSM96)

description: 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 rare earth element and yttrium (REY) and manganese (Mn) concentrations of pore water and MUC overlying botom seawater from the abyssal Atlantic Ocean. Pore waters are oxic (no elevated Mn) and REY pore-water concentrations are low with 10-40 pM.Samples were collected during cruise MSM96 in 2020. Pore waters were sampled from MUC liners and for some samples several liners were pooled to acquire sufficient volume, especially for samples for which also Nd isotopes were measured. 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 and nuclepore membrane filters using gas pressure). Pore water and seawater was preserved by acidification to ~ pH 1.8 with concentrated ultrapure HCl. REY and Mn for filtered samples 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.Diffusive gradients in thin films (DGTs) were deployed for 12.5 and 28.4 hours at 5°C. Membranes were cut into 1-4 cm slices, eluted with 1 M HNO3 and measured by quadrupole ICP-MS (Perkin Elmer Nexion 350x). Sample concentrations were then calculated following methods described in Zhang and Davison (1995). The different methods lead to different results and based on a comparison of concentration data and shale-normalized REY patterns, syringe filtered samples were deemed most reliable.
DOI: 10.1594/pangaea.982939
title: Dissolved, soluble, and truly dissolved rare earth element and yttrium and manganese concentrations in bottom seawater from the Atlantic (MSM96)

description: 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 rare earth element and yttrium (REY) and manganese (Mn) concentrations of bottom seawater from the abyssal Atlantic Ocean.Samples were collected during cruise MSM96 in 2020. Seawater samples were taken with NISKIN bottles attached to a CTD water sampling carousel. Samples were filtered using 0.8/0.2 µm Acropak capsule filters for the dissolved fraction (&lt;0.2 µm), and subsequently through either 0.015 µm nuclepore membrane filters (Whatman; under gas pressure) for the soluble (&lt;0.015 µm) fraction or ultrafiltered using a Millipore Pellicon 2 tangential flow ultrafiltration system with a 10 kDa nominal molecular weight cutoff (truly dissolved fraction &lt;10 kDa). Samples were preserved by acidification to ~ pH 1.8 with concentrated 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.
DOI: 10.1594/pangaea.986893
title: Age (40Ar/39Ar) data and major and trace element and isotope (Sr, Nd, Pb, Hf) data of igneous rocks recovered from the King's Trough area in the North Atlantic during METEOR cruise M168

description: Major and certain trace element data determined on fused glass pellets of igneous whole rock samples by XRF and by Electron Microprobe on fresh volcanic glass fragments. Comprehensive trace element analyses from a subset of these samples carried out by (solution) inductively coupled plasma mass spectrometry (ICP-MS) and by laser ablation ICP-MS (glass fragments). Radiogenic (Sr, Nd, Pb, Hf) isotope ratios by utilizing a thermal ionization mass spectrometer (Sr, Nd, Pb isotopes) and a Multi-Collector (MC)-ICP-MS (Hf isotopes). Information on data quality and international rock standard measurements are included in this data publication. 40Ar/39Ar geochronology was carried out on groundmass and plagioclase separates by using a Nu Instruments Noblesse mass spectrometer. Analytical data tables, age spectra and inverse isochrons plots are included in this data publication.
description: S2_Complete 40Ar/39Ar analytical dataS3_Age spectra and inverse isochrone plots of the 40Ar/39Ar age dataS4_ Analytical information on standards, duplicates and reference materials measured along with the samples (S4.1: XRF; S4.2: EMP; S4.3: solution ICP-MS; S4.4: Replicates solution ICP-MS; S4.5: Instrument stability of solution ICP-MS; S4.6: La-ICP-MS; S4.7: TIMS+MC-ICP-MS (radiogenic isotopes))S5_Sample locations, accepted age and complete geochemical data (including age-corrected and projected isotope values)
DOI: 10.3535/6cj-vxm-zt8
title: Viola reichenbachiana Jord. ex Boreau x Viola rupestris F. W. Schmidt

description: Digital Specimen for the physical specimen hosted at University of Graz.
DOI: 10.1594/pangaea.972480
title: Multibeam bathymetry processed data (RESON SeaBat T51-P working area dataset) of RV ALKOR during cruise AL590, west of Rügen peninsula, Baltic Sea

description: Multibeam bathymetry processed data (RESON T51-P multibeam echosounder) were collected onboard RV ALKOR during cruise AL590 in the German Baltic Sea (2023-03-17 - 2023-03-31) at Zingst, Rügen. The raw data (QPS .dbformat) were processed using QPS Qimera software (v 1.7), based on the following workflow: 0.Raw data &gt; 1.Apply correct Sound Velocity Profiles -&gt; 2.Create dynamic surface (shallow Mode) -&gt; 3.Apply Spline Filter (Medium/Weak) &gt; 4. Finalize with manual 2D and 3D editing, -&gt; 5.Export in GeoTIFF format and projected in the UTM33N coordinate system (EPSG:32633). The produced rasters are named AL590_T51_'working area'_'resolution in cm' . The bathymetry dataset here is gridded at 0.25 m and 0.50 m resolution. The data products were created in the context of the DAM (German Marine Research Alliance), CONMAR research project.
description: These data should not be used for navigational purposes.
DOI: 10.1594/pangaea.972483
title: Multibeam bathymetry processed data (RESON SeaBat T51-P working area dataset) of RV ALKOR during cruise AL590, north-west of Rügen peninsula, Germany, Baltic Sea

description: Multibeam bathymetry processed data (RESON T51-P multibeam echosounder) was collected onboard RV ALKOR during cruise AL590 in the German Baltic Sea (2023-03-17 - 2023-03-31) at Dranske, Rügen. The raw data (QPS .dbformat) were processed using QPS Qimera software (v 1.7), based on the following workflow: 0.Raw data -&gt; 1.Apply correct Sound Velocity Profiles -&gt; 2.Create dynamic surface (shallow Mode) -&gt; 3.Apply Spline Filter (Medium/Weak)- &gt; 4. Finalize with manual 2D and 3D editing, -&gt; 5.Export in GeoTIFF format and projected in the UTM33N coordinate system (EPSG:32633). The produced rasters are named AL590_T51_'working area'_'resolution in cm' . The bathymetry dataset here is gridded at 0.25 m and 0.50 m resolution. The data products were created in the context of the DAM (German Marine Research Alliance), CONMAR research project.
description: These data should not be used for navigational purposes.
DOI: 10.1594/pangaea.986777
title: Onshore correlation glass data for selected tephra units on São Miguel Island, Azores

description: A total of 44 gravity cores were collected in the Azores region in 2017, during the R/V Meteor cruise M141/1. Based on their length, content in tephra layers, and spatial distribution around São Miguel, 22 cores have been carefully selected as the most representative to gain insights on the volcanic history and the depositional marine environment around the islands of the eastern group of the archipelago. In total, 454 samples from 350 ash- or pumice/scoria/lapilli- bearing horizons were examined. Additionally, we present glass data for 26 onshore deposits sampled on São Miguel Island. Subaerial lapilli samples were cleaned in an ultrasonic bath and then crushed. All samples and the previously crushed lapilli samples were wet-sieved into different grain size fractions. The 125-63 microns fraction was embedded with epoxy in pre-drilled acrylic mounts and polished for geochemical micro-analyses. Major and minor element compositions of glass shards were conducted using a JEOL JXA 8200 wavelength dispersive EMP at GEOMAR Helmholtz-Centre for Ocean Research, Kiel, Germany. Every 60 individual glass shards analyses were bracketed by a set of four standard analyses. We analyzed 15–25 single glass shards per sample. Outliers with totals below 92 wt.%, as well as accidental mineral analyses were removed from the dataset.
description: S2-S4 analyzed 2020-11-20, SM1-SM4 analyzed 2020-05-21
DOI: 10.1594/pangaea.987026
title: Major element glass data of marine tephras from sediment core M141/1_1154-1

description: A total of 44 gravity cores were collected in the Azores region in 2017, during the R/V Meteor cruise M141/1. Based on their length, content in tephra layers, and spatial distribution around São Miguel, 22 cores have been carefully selected as the most representative to gain insights on the volcanic history and the depositional marine environment around the islands of the eastern group of the archipelago. In total, 454 samples from 350 ash- or pumice/scoria/lapilli- bearing horizons were examined. Here we present the major element glass data of the Pleistocene to Holocene marine tephra record around the eastern islands of the Azores. Marine lapilli samples were cleaned in an ultrasonic bath and then crushed. All ash samples and the previously crushed lapilli samples were wet-sieved into different grain size fractions. The 125-63 microns fraction was embedded with epoxy in pre-drilled acrylic mounts and polished for geochemical micro-analyses. Major and minor element compositions of glass shards were conducted using a JEOL JXA 8200 wavelength dispersive EMP at GEOMAR Helmholtz-Centre for Ocean Research, Kiel, Germany.Every 60 individual glass shards analyses were bracketed by a set of four standard analyses. We analyzed 15–25 single glass shards per sample (~7,000 analyses in total). Outliers with totals below 92 wt.%, as well as accidental mineral analyses were removed from the dataset.
DOI: 10.1594/pangaea.987027
title: Major element glass data of marine tephras from sediment core M141/1_1156-1

description: A total of 44 gravity cores were collected in the Azores region in 2017, during the R/V Meteor cruise M141/1. Based on their length, content in tephra layers, and spatial distribution around São Miguel, 22 cores have been carefully selected as the most representative to gain insights on the volcanic history and the depositional marine environment around the islands of the eastern group of the archipelago. In total, 454 samples from 350 ash- or pumice/scoria/lapilli- bearing horizons were examined. Here we present the major element glass data of the Pleistocene to Holocene marine tephra record around the eastern islands of the Azores. Marine lapilli samples were cleaned in an ultrasonic bath and then crushed. All ash samples and the previously crushed lapilli samples were wet-sieved into different grain size fractions. The 125-63 microns fraction was embedded with epoxy in pre-drilled acrylic mounts and polished for geochemical micro-analyses. Major and minor element compositions of glass shards were conducted using a JEOL JXA 8200 wavelength dispersive EMP at GEOMAR Helmholtz-Centre for Ocean Research, Kiel, Germany.Every 60 individual glass shards analyses were bracketed by a set of four standard analyses. We analyzed 15–25 single glass shards per sample (~7,000 analyses in total). Outliers with totals below 92 wt.%, as well as accidental mineral analyses were removed from the dataset.
DOI: 10.1594/pangaea.987028
title: Major element glass data of marine tephras from sediment core M141/1_1160-1

description: A total of 44 gravity cores were collected in the Azores region in 2017, during the R/V Meteor cruise M141/1. Based on their length, content in tephra layers, and spatial distribution around São Miguel, 22 cores have been carefully selected as the most representative to gain insights on the volcanic history and the depositional marine environment around the islands of the eastern group of the archipelago. In total, 454 samples from 350 ash- or pumice/scoria/lapilli- bearing horizons were examined. Here we present the major element glass data of the Pleistocene to Holocene marine tephra record around the eastern islands of the Azores. Marine lapilli samples were cleaned in an ultrasonic bath and then crushed. All ash samples and the previously crushed lapilli samples were wet-sieved into different grain size fractions. The 125-63 microns fraction was embedded with epoxy in pre-drilled acrylic mounts and polished for geochemical micro-analyses. Major and minor element compositions of glass shards were conducted using a JEOL JXA 8200 wavelength dispersive EMP at GEOMAR Helmholtz-Centre for Ocean Research, Kiel, Germany.Every 60 individual glass shards analyses were bracketed by a set of four standard analyses. We analyzed 15–25 single glass shards per sample (~7,000 analyses in total). Outliers with totals below 92 wt.%, as well as accidental mineral analyses were removed from the dataset.
DOI: 10.1594/pangaea.987029
title: Major element glass data of marine tephras from sediment core M141/1_1162-3

description: A total of 44 gravity cores were collected in the Azores region in 2017, during the R/V Meteor cruise M141/1. Based on their length, content in tephra layers, and spatial distribution around São Miguel, 22 cores have been carefully selected as the most representative to gain insights on the volcanic history and the depositional marine environment around the islands of the eastern group of the archipelago. In total, 454 samples from 350 ash- or pumice/scoria/lapilli- bearing horizons were examined. Here we present the major element glass data of the Pleistocene to Holocene marine tephra record around the eastern islands of the Azores. Marine lapilli samples were cleaned in an ultrasonic bath and then crushed. All ash samples and the previously crushed lapilli samples were wet-sieved into different grain size fractions. The 125-63 microns fraction was embedded with epoxy in pre-drilled acrylic mounts and polished for geochemical micro-analyses. Major and minor element compositions of glass shards were conducted using a JEOL JXA 8200 wavelength dispersive EMP at GEOMAR Helmholtz-Centre for Ocean Research, Kiel, Germany.Every 60 individual glass shards analyses were bracketed by a set of four standard analyses. We analyzed 15–25 single glass shards per sample (~7,000 analyses in total). Outliers with totals below 92 wt.%, as well as accidental mineral analyses were removed from the dataset.
DOI: 10.1594/pangaea.987030
title: Major element glass data of marine tephras from sediment core M141/1_1164-1

description: A total of 44 gravity cores were collected in the Azores region in 2017, during the R/V Meteor cruise M141/1. Based on their length, content in tephra layers, and spatial distribution around São Miguel, 22 cores have been carefully selected as the most representative to gain insights on the volcanic history and the depositional marine environment around the islands of the eastern group of the archipelago. In total, 454 samples from 350 ash- or pumice/scoria/lapilli- bearing horizons were examined. Here we present the major element glass data of the Pleistocene to Holocene marine tephra record around the eastern islands of the Azores. Marine lapilli samples were cleaned in an ultrasonic bath and then crushed. All ash samples and the previously crushed lapilli samples were wet-sieved into different grain size fractions. The 125-63 microns fraction was embedded with epoxy in pre-drilled acrylic mounts and polished for geochemical micro-analyses. Major and minor element compositions of glass shards were conducted using a JEOL JXA 8200 wavelength dispersive EMP at GEOMAR Helmholtz-Centre for Ocean Research, Kiel, Germany.Every 60 individual glass shards analyses were bracketed by a set of four standard analyses. We analyzed 15–25 single glass shards per sample (~7,000 analyses in total). Outliers with totals below 92 wt.%, as well as accidental mineral analyses were removed from the dataset.
DOI: 10.1594/pangaea.986781
title: Major element glass data of marine tephras from sediment core M141/1_1136-1

description: A total of 44 gravity cores were collected in the Azores region in 2017, during the R/V Meteor cruise M141/1. Based on their length, content in tephra layers, and spatial distribution around São Miguel, 22 cores have been carefully selected as the most representative to gain insights on the volcanic history and the depositional marine environment around the islands of the eastern group of the archipelago. In total, 454 samples from 350 ash- or pumice/scoria/lapilli- bearing horizons were examined. Here we present the major element glass data of the Pleistocene to Holocene marine tephra record around the eastern islands of the Azores. Marine lapilli samples were cleaned in an ultrasonic bath and then crushed. All ash samples and the previously crushed lapilli samples were wet-sieved into different grain size fractions. The 125-63 microns fraction was embedded with epoxy in pre-drilled acrylic mounts and polished for geochemical micro-analyses. Major and minor element compositions of glass shards were conducted using a JEOL JXA 8200 wavelength dispersive EMP at GEOMAR Helmholtz-Centre for Ocean Research, Kiel, Germany.Every 60 individual glass shards analyses were bracketed by a set of four standard analyses. We analyzed 15–25 single glass shards per sample (~7,000 analyses in total). Outliers with totals below 92 wt.%, as well as accidental mineral analyses were removed from the dataset.
DOI: 10.1594/pangaea.987031
title: Major element glass data of marine tephras from sediment core M141/1_1168-1

description: A total of 44 gravity cores were collected in the Azores region in 2017, during the R/V Meteor cruise M141/1. Based on their length, content in tephra layers, and spatial distribution around São Miguel, 22 cores have been carefully selected as the most representative to gain insights on the volcanic history and the depositional marine environment around the islands of the eastern group of the archipelago. In total, 454 samples from 350 ash- or pumice/scoria/lapilli- bearing horizons were examined. Here we present the major element glass data of the Pleistocene to Holocene marine tephra record around the eastern islands of the Azores. Marine lapilli samples were cleaned in an ultrasonic bath and then crushed. All ash samples and the previously crushed lapilli samples were wet-sieved into different grain size fractions. The 125-63 microns fraction was embedded with epoxy in pre-drilled acrylic mounts and polished for geochemical micro-analyses. Major and minor element compositions of glass shards were conducted using a JEOL JXA 8200 wavelength dispersive EMP at GEOMAR Helmholtz-Centre for Ocean Research, Kiel, Germany.Every 60 individual glass shards analyses were bracketed by a set of four standard analyses. We analyzed 15–25 single glass shards per sample (~7,000 analyses in total). Outliers with totals below 92 wt.%, as well as accidental mineral analyses were removed from the dataset.