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  • Data  (1,436)
  • 2020-2024  (1,040)
  • 1995-1999  (396)
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  • 1
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    Mg/Ca analyses of the planktic foraminifera Acarinina soldadoensis from ODP Hole 113-690B (2020)
    PANGAEA
    Details
    Publication Date: 2023-07-11
    Description: Acarininid shells were cast in epoxy, ground to midsection and imaged by SEM to identify suitable domains for analysis. Fully quantitative Mg/Ca analyses by a CAMECA SX-51 Electron Probe Microanalyzer (mineral standards, background subtracted, and matrix corrected) were performed using Probe for EPMA© software. An accelerating voltage of 15 kV with 10 nA Faraday current and a tightly focused beam were used, with a counting time of 20s on the peak and 10s on each of the two background positions. These analyses were performed using the “Time Dependent Intensity” feature of the Probe for EPMA software, where Ca and Mg were measured in 4 s increments and counts were plotted against time, with extrapolation to time = 0s as the true count rate. The natural carbonate standards Delight Dolomite, Callender Calcite, and UWC-3 were used for Mg and Ca; Mg-KαX-rays were measured on two spectrometers and aggregated. Carbon was calculated within the matrix correction on an atomic basis as C = (Ca + Mg + Sr). Whenever possible, multiple Mg/Ca measurements were placed in each acarininid shell, and the average value was calculated. Data Quality Information: Only EPMA analytical totals of 98.5 – 100.5 wt.% were considered acceptable
    Keywords: 113-690B; Acarinina soldadoensis; Acarinina soldadoensis, Magnesium/Calcium ratio; Acarininids; Calculated; d18O; DEPTH, sediment/rock; DRILL; Drilling/drill rig; DSDP/ODP/IODP sample designation; EPMA; Joides Resolution; Leg113; Mg/Ca; ODP Site 690; PETM; Sample code/label; SIMS; Size fraction; South Atlantic Ocean; Weddell Sea
    Type: Dataset
    Format: text/tab-separated-values, 288 data points
    Location Call Number Expected Availability
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  • 2
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    U-Th isotopes and Fe-Mn composition of layers from the bottom side of Mn nodule SO11_262DK (262GBHF) (2022)
    PANGAEA
    Details
    Publication Date: 2023-08-28
    Description: Attempts have been made to study the entire growth history of a manganese nodule from the northern part of Peru Basin in the Pacific using radiochemical profiles of 230Th232Th, 227Th230Th, and 10Be9Be. Combined with the observations on Fe-Mn contents and textural variation, the radiochemical data indicate that the nodule grew more or less concentrically throughout most of its existence since it formed 1.5 my ago, receiving Mn from both bottom water and pore water. This condition appeared to have changed about 180 ky ago when the growth became asymmetric in that the top and bottom sides became fixed in their relative positions on the sea floor. Since then, the bottom side accreted with a fast rate of close to 200 mm/my, apparently fueled by the supply of diagenetically remobilized Mn in pore water from the sediment substrate. In the meantime, the top side accumulated at about 6 mm/my, a value which is in the normal range for deep-sea nodules having their Mn supplied from the hydrogenous source.
    Keywords: 262GBHF; Alpha spectrometry; Deposit type; DEPTH, sediment/rock; Distance; Distance, maximum; Distance, minimum; Dredge, box; DRG_B; Elevation of event; growth; Identification; Iron; Latitude of event; Longitude of event; Manganese; manganese nodules; NOAA and MMS Marine Minerals Geochemical Database; NOAA-MMS; ocean; Peru Basin, Pacific Ocean; SO11; SO11_262DK; Sonne; SOPAC II; Thorium-227; Thorium-227, standard deviation; Thorium-227 excess/Thorium-230 excess activity ratio; Thorium-227 excess/Thorium-230 excess activity ratio, standard deviation; Thorium-230; Thorium-230, standard deviation; Thorium-230 excess/Thorium-232 activity ratio; Thorium-230 excess/Thorium-232 activity ratio, standard deviation; Thorium-232; Thorium-232, standard deviation; Uranium-234; Uranium-234, standard deviation; Uranium-234/Uranium-238 activity ratio; Uranium-234/Uranium-238 activity ratio, standard deviation
    Type: Dataset
    Format: text/tab-separated-values, 243 data points
    Location Call Number Expected Availability
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    DATA PANGAEA
  • 3
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    Beryllium isotopes composition of layers from the bottom side of Mn nodule SO11_262DK (262GBHF) (2022)
    PANGAEA
    Details
    Publication Date: 2023-08-28
    Description: Attempts have been made to study the entire growth history of a manganese nodule from the northern part of Peru Basin in the Pacific using radiochemical profiles of 230Th232Th, 227Th230Th, and 10Be9Be. Combined with the observations on Fe-Mn contents and textural variation, the radiochemical data indicate that the nodule grew more or less concentrically throughout most of its existence since it formed 1.5 my ago, receiving Mn from both bottom water and pore water. This condition appeared to have changed about 180 ky ago when the growth became asymmetric in that the top and bottom sides became fixed in their relative positions on the sea floor. Since then, the bottom side accreted with a fast rate of close to 200 mm/my, apparently fueled by the supply of diagenetically remobilized Mn in pore water from the sediment substrate. In the meantime, the top side accumulated at about 6 mm/my, a value which is in the normal range for deep-sea nodules having their Mn supplied from the hydrogenous source.
    Keywords: 262GBHF; Atomic absorption spectrometry (AAS); Beryllium-10; Beryllium-10, standard deviation; Beryllium-10/Beryllium-9; Beryllium-10/Beryllium-9, standard deviation; Beryllium-9; Beryllium-9, standard deviation; Deposit type; DEPTH, sediment/rock; Distance; Distance, maximum; Distance, minimum; Dredge, box; DRG_B; Elevation of event; growth; Identification; Iron; Latitude of event; Longitude of event; Manganese; manganese nodules; NOAA and MMS Marine Minerals Geochemical Database; NOAA-MMS; ocean; Peru Basin, Pacific Ocean; SO11; SO11_262DK; Sonne; SOPAC II
    Type: Dataset
    Format: text/tab-separated-values, 89 data points
    Location Call Number Expected Availability
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    DATA PANGAEA
  • 4
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    δ¹⁸O analyses of the planktic foraminifera Acarinina soldadoensis from ODP Hole 113-690B (2020)
    PANGAEA
    Details
    Publication Date: 2023-07-11
    Description: Sampling and Analyzing Method: Acarininid shells were cast in epoxy, ground to midsection and imaged by SEM to identify suitable, well-preserved domains for analysis. In situ d18O data were acquired in the WiscSIMS Laboratory at the Department of Geoscience, UW-Madison, using a CAMECA IMS-1280 large radius multicollector SIMS. (Kita et al., 2009; Valley and Kita, 2009). Depending on the size of the target, samples were analyzed with a 10 µm or 3 µm primary beam. Four consecutive measurements of UWC-3 calcite standard (d18O = 12.40 per mille Vienna standard mean ocean water; VSMOW; Kozdon et al., 2009) were performed before and after every set of typically 10 sample analyses.
    Keywords: 113-690B; Acarinina soldadoensis; Acarinina soldadoensis, δ18O; Acarininids; d18O; DEPTH, sediment/rock; DRILL; Drilling/drill rig; EPMA; Joides Resolution; Leg113; Mg/Ca; ODP Site 690; PETM; Sample code/label; SIMS; Size fraction; South Atlantic Ocean; Weddell Sea
    Type: Dataset
    Format: text/tab-separated-values, 204 data points
    Location Call Number Expected Availability
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    DATA PANGAEA
  • 5
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    Growth of a manganese nodule from Peru Basin: A radiochemical anatomy (2022)
    PANGAEA
    Details
    Publication Date: 2023-08-28
    Description: Attempts have been made to study the entire growth history of a manganese nodule from the northern part of Peru Basin in the Pacific using radiochemical profiles of 230Th232Th, 227Th230Th, and 10Be9Be. Combined with the observations on Fe-Mn contents and textural variation, the radiochemical data indicate that the nodule grew more or less concentrically throughout most of its existence since it formed 1.5 my ago, receiving Mn from both bottom water and pore water. This condition appeared to have changed about 180 ky ago when the growth became asymmetric in that the top and bottom sides became fixed in their relative positions on the sea floor. Since then, the bottom side accreted with a fast rate of close to 200 mm/my, apparently fueled by the supply of diagenetically remobilized Mn in pore water from the sediment substrate. In the meantime, the top side accumulated at about 6 mm/my, a value which is in the normal range for deep-sea nodules having their Mn supplied from the hydrogenous source.
    Keywords: 262GBHF; Dredge, box; DRG_B; growth; manganese nodules; NOAA and MMS Marine Minerals Geochemical Database; NOAA-MMS; ocean; Peru Basin, Pacific Ocean; SO11; SO11_262DK; Sonne; SOPAC II
    Type: Dataset
    Format: application/zip, 4 datasets
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    DATA PANGAEA
  • 6
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    Beryllium isotopes composition of layers from the top side of Mn nodule SO11_262DK (262GBHF) (2022)
    PANGAEA
    Details
    Publication Date: 2023-08-28
    Description: Attempts have been made to study the entire growth history of a manganese nodule from the northern part of Peru Basin in the Pacific using radiochemical profiles of 230Th232Th, 227Th230Th, and 10Be9Be. Combined with the observations on Fe-Mn contents and textural variation, the radiochemical data indicate that the nodule grew more or less concentrically throughout most of its existence since it formed 1.5 my ago, receiving Mn from both bottom water and pore water. This condition appeared to have changed about 180 ky ago when the growth became asymmetric in that the top and bottom sides became fixed in their relative positions on the sea floor. Since then, the bottom side accreted with a fast rate of close to 200 mm/my, apparently fueled by the supply of diagenetically remobilized Mn in pore water from the sediment substrate. In the meantime, the top side accumulated at about 6 mm/my, a value which is in the normal range for deep-sea nodules having their Mn supplied from the hydrogenous source.
    Keywords: 262GBHF; Atomic absorption spectrometry (AAS); Beryllium-10; Beryllium-10, standard deviation; Beryllium-10/Beryllium-9; Beryllium-10/Beryllium-9, standard deviation; Beryllium-9; Beryllium-9, standard deviation; Deposit type; DEPTH, sediment/rock; Distance; Distance, maximum; Distance, minimum; Dredge, box; DRG_B; Elevation of event; growth; Identification; Iron; Latitude of event; Longitude of event; Manganese; manganese nodules; NOAA and MMS Marine Minerals Geochemical Database; NOAA-MMS; ocean; Peru Basin, Pacific Ocean; SO11; SO11_262DK; Sonne; SOPAC II
    Type: Dataset
    Format: text/tab-separated-values, 117 data points
    Location Call Number Expected Availability
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    DATA PANGAEA
  • 7
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    Unknown
    U-Th isotopes and Fe-Mn composition of layers from the top side of Mn nodule SO11_262DK (262GBHF) (2022)
    PANGAEA
    Details
    Publication Date: 2023-08-28
    Description: Attempts have been made to study the entire growth history of a manganese nodule from the northern part of Peru Basin in the Pacific using radiochemical profiles of 230Th232Th, 227Th230Th, and 10Be9Be. Combined with the observations on Fe-Mn contents and textural variation, the radiochemical data indicate that the nodule grew more or less concentrically throughout most of its existence since it formed 1.5 my ago, receiving Mn from both bottom water and pore water. This condition appeared to have changed about 180 ky ago when the growth became asymmetric in that the top and bottom sides became fixed in their relative positions on the sea floor. Since then, the bottom side accreted with a fast rate of close to 200 mm/my, apparently fueled by the supply of diagenetically remobilized Mn in pore water from the sediment substrate. In the meantime, the top side accumulated at about 6 mm/my, a value which is in the normal range for deep-sea nodules having their Mn supplied from the hydrogenous source.
    Keywords: 262GBHF; Alpha spectrometry; Deposit type; DEPTH, sediment/rock; Distance; Distance, maximum; Distance, minimum; Dredge, box; DRG_B; Elevation of event; growth; Identification; Iron; Latitude of event; Longitude of event; Manganese; manganese nodules; NOAA and MMS Marine Minerals Geochemical Database; NOAA-MMS; ocean; Peru Basin, Pacific Ocean; SO11; SO11_262DK; Sonne; SOPAC II; Thorium-227; Thorium-227, standard deviation; Thorium-227 excess/Thorium-230 excess activity ratio; Thorium-227 excess/Thorium-230 excess activity ratio, standard deviation; Thorium-230; Thorium-230, standard deviation; Thorium-230 excess/Thorium-232 activity ratio; Thorium-230 excess/Thorium-232 activity ratio, standard deviation; Thorium-232; Thorium-232, standard deviation; Uranium-234; Uranium-234, standard deviation; Uranium-234/Uranium-238 activity ratio; Uranium-234/Uranium-238 activity ratio, standard deviation
    Type: Dataset
    Format: text/tab-separated-values, 226 data points
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  • 8
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    International database of Glacially Induced Faults (2020)
    PANGAEA
    Details
    Publication Date: 2024-04-20
    Description: We provide a GIS data inventory of confirmed and proposed glacially-induced faults. Stresses, perturbated as a response to the advance and retreat of continental ice sheets and glaciers, can reactivate pre-existing faults. Previously referred to as "PostGlacial Faults" (PGFs), these faults are now called "Glacially-Induced Faults" (GIFs). More than a dozen kilometre-long and several metre-high fault-scarps have been identified in northern Fennoscandia since extensive investigations started in the 1960s and 1970s. Similar faults, but by far not of such dimensions, have also been described in eastern Canada. In other formerly glaciated areas in Europe, e.g., the southern parts of Sweden, Norway and Finland, the southern Baltic Sea, Denmark, northern Germany and Poland, and the Baltic countries, GIFs have rarely been observed and discussed in the literature. However, the number of studies with reliable field evidence for proposing such faults has increased considerably in recent years. The estimated fault movements are of minor magnitude, though, as compared with those in northern Fennoscandia. The database contains the confirmed GIFs in northern Fennoscandia including north-western Russia. The geological surveys in Norway, Sweden and Finland analysed recent LiDAR (Light Detection And Ranging) data from their countries, which helped uncover new faults and revise the geometry of the existing ones. In addition, we include several proposed GIFs outside this area, e.g., in southern Sweden, Denmark and Germany. Ongoing work suggests the occurrence of GIFs in Iceland, Canada and Antarctica. The database will be continually updated, considering new results. A summarized description of the GIF in this database is given in: Steffen, H., Olesen, O., and Sutinen, R. (2021). Glacially-Triggered Faulting. Cambridge University Press, Cambridge, UK, ca. 450 pp., expected publication February 2021.
    Keywords: Glacially induced faults; Post-Glacial faults (PGF)
    Type: Dataset
    Format: application/zip, 161.1 kBytes
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  • 9
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    The GeoMAP (v.2022-08) continent-wide detailed geological dataset of Antarctica (2023)
    PANGAEA
    Details
    Publication Date: 2024-04-20
    Description: A dataset describing exposed bedrock and surficial geology of Antarctica constructed by the GeoMAP Action Group of SCAR (The Scientific Committee on Antarctic Research) and GNS Science, New Zealand. Legacy geological map data have been captured into a geographic information system (GIS), refining its spatial reliability, harmonising classification, then improving representation of glacial sequences and geomorphology. A total 99,080 polygons have been unified for depicting geology at 1:250,000 scale, but locally there are some areas with higher spatial precision. Geological definition in GeoMAP v.2022-08 is founded on a mixed chronostratigraphic- and lithostratigraphic-based classification. Description of rock and moraine polygons employs international GeoSciML data protocols to provide attribute-rich and queriable data; including bibliographic links to 589 source maps and scientific literature. Data are provided under CC-BY License as zipped ArcGIS geodatabase, QGIS geopackage or GoogleEarth kmz files. GeoMAP is the first detailed geological dataset covering all of Antarctica. GeoMAP depicts 'known geology' of rock exposures rather than 'interpreted' sub-ice features and is suitable for continent-wide perspectives and cross-discipline interrogation.
    Keywords: Antarctica; bedrock; Binary Object; Binary Object (File Size); Binary Object (MD5 Hash); Binary Object (Media Type); geology; Geomorphology; GIS; Glacial deposits; historical data; mapping; synthesis
    Type: Dataset
    Format: text/tab-separated-values, 3 data points
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  • 10
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    Stable oxygen isotope ratios of tree-ring cellulose from the site network of the EU-Project ‘ISONET’ (2023)
    GFZ Data Services
    Details
    Publication Date: 2023-02-09
    Description: Abstract
    Description: 24 European annually resolved stable isotope chronologies have been constructed from tree ring cellulose for the last 400 years (1600CE – 2003CE) for carbon and oxygen and for the last 100 years for hydrogen. Data was produced within the ISONET project (400 Years of Annual Reconstructions of European Climate Variability Using a Highly Resolved Isotopic Network,) to initiate an extensive spatiotemporal tree-ring stable isotope network across Europe funded as part of the fifth EC Framework Programme “Energy, Environment and Sustainable Development”. This data set comprises the ISONET δ18O records.
    Description: Methods
    Description: Wood increment cores of 15 or more Pinus sylvestris, Quercus robur/petraea or Cedrus atlantica tree individuals were taken. Dendro-dated tree-ring material of 4-5 individuals per site was dissected and pooled year by year. After cellulose extraction and homogenization, 18O/16O-ratios of annually resolved samples were determined by Isotope Ratio Mass Spectrometry (IRMS). Time series of 18O/16O are given as d-values versus SMOW. Details can be found in the downloadable “data description” file.
    Description: Other
    Description: The ISONET project has been striving to improve greatly our understanding of European climate systems providing independent quantitative data for model verification and policy making. A network of 24 sites provides dendrochronological coverage from Iberia to Fennoscandia, Caledonia and the Tyrol. The stable isotope (C, H, O) ratios of these annually resolved time series shall be analysed within this project, to reconstruct past climate regimes (temperature, relative humidity and precipitation characteristics) for the last 400 years. Climate variability shall be addressed on three timescales; decade-century (source water/air mass dominance); inter-annual (quantifying baseline variability, extreme events and recent trends); and intra-annual (high resolution exploration of seasonality signals within tree-rings). ISONET goes far beyond existing tree-ring analyses in its spatial based investigation and interpretation (see also https://cordis.europa.eu/project/id/EVK2-CT-2002-00147).
    Type: Dataset , Dataset
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