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  • 1
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    A New Calcium Carbonate Nano‐Particulate Pressed Powder Pellet (NFHS‐2‐NP) for LA‐ICP‐OES, LA‐(MC)‐ICP‐MS and µXRF (2022)
    Wiley
    Details
    Publication Date: 2024-02-07
    Description: A new matrix-matched reference material has been developed – NFHS-2-NP (NIOZ Foraminifera House Standard-2-Nano-Pellet) – with element mass fractions, and isotope ratios resembling that of natural foraminiferal calcium carbonate. A 180–355 µm size fraction of planktic foraminifera was milled to nano-particles and pressed to pellets. We report reference and information values for mass fractions of forty-six elements measured by six laboratories as well as for 87Sr/86Sr (three laboratories), δ13C, δ18O (five laboratories), and 206,207,208Pb/204Pb isotope ratios (one laboratory) determined by ICP-MS, ICP-OES, MC-ICP-MS, IRMS, WD-XRF and TIMS. Inter- and intra-pellet elemental homogeneity was tested using multiple LA-ICP-MS analyses in two laboratories applying spot sizes of 60 and 70 µm. The LA-ICP-MS results for most of the elements relevant as proxies for palaeoclimate research show RSD values 〈 3%, demonstrating a satisfactory homogeneous composition. Homogeneity of 87Sr/86Sr ratios of the pellet was verified by repeated LA-MC-ICP-MS by two laboratories. Information values are reported for Pb isotope ratios and δ13C, δ18O values. The homogeneity for these isotope systems remains to be tested by LA-MC-ICP-MS and SIMS. Overall, our results confirm the suitability of NFHS-2-NP for calibration or monitoring the quality of in situ geochemical techniques.
    Type: Article , PeerReviewed
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    OceanRep: Article in a Scientific Journal - peer-reviewed
  • 2
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    Mineralogical assemblage possible source area samples (2013)
    PANGAEA
    Details
    Publication Date: 2023-03-03
    Keywords: AEROS; Aerosol sampler; Amphibole; Aragonite; Barite; Calcite; Calcite/Dolomite ratio; Calculated; Carbonates; Center for Marine Environmental Sciences; Chak; Chlorite; Depth comment; Dolomite; Epidote; Event label; Fish-Harbour-Tide; Garnet; GeoB; Geosciences, University of Bremen; Guddu; Gypsum; Hirgol-River; Illite+mica; Illite 10Å/Micas 5Å, ratio of integrated intensities; Iron oxide; Kalifeldspar; Kalifeldspar/Plagioclase ratio; Kaolinite; Kaolinite (3.56-3.58Å)/Chlorite (3.50-3.54Å), ratio of integrated intensities; Latitude of event; Longitude of event; Magnetite; Mansoore; MARUM; Mixed layer clay minerals; Montmorillonite; Nara; Nara_Chund-Kho-Loess; Nio-Substation; Phyllosilicate; Plagioclase; PTLC-Office; Pyrite, FeS2; Pyroxene; Quartz; Quartz/Feldspar ratio; Quartz/Phyllosillicates ratio; Sample code/label; Siderite; Sodium chloride; South_of_Fort_Derawar; Thatta; X-ray diffraction (XRD); Zeolite
    Type: Dataset
    Format: text/tab-separated-values, 358 data points
    Location Call Number Limitation Availability
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    DATA PANGAEA
  • 3
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    Rare earth elements in surface sediment samples from the Atlantic Sector
    PANGAEA
    Details
    Publication Date: 2023-05-12
    Keywords: Area/locality; Cerium; Comment; DEPTH, sediment/rock; Dysprosium; EPICA; Erbium; European Project for Ice Coring in Antarctica; Europium; Gadolinium; Holmium; ICP-Q-MS; Inductively coupled plasma-quadrupole-mass spectrometry; Lanthanum; LATITUDE; LONGITUDE; Lutetium; Neodymium; Praseodymium; Samarium; Sample code/label; Terbium; Thulium; Ytterbium
    Type: Dataset
    Format: text/tab-separated-values, 536 data points
    Location Call Number Limitation Availability
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    DATA PANGAEA
  • 4
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    Rare earth elements from the Atlantic Sector
    PANGAEA
    In:  Supplement to: Wegner, Anna; Gabrielli, Paolo; Wilhelms-Dick, Dorothee; Ruth, Urs; Kriews, Michael; De Deckker, Patrick; Barbante, Carlo; Cozzi, Giulio; Delmonte, Barbara; Fischer, H (2012): Change in dust variability in the Atlantic sector of Antarctica at the end of the last deglaciation. Climate of the Past, 8(1), 135-147, https://doi.org/10.5194/cp-8-135-2012
    Details
    Publication Date: 2023-06-27
    Description: We present a Rare Earth Elements (REE) record at decadal resolution determined in the EPICA ice core drilled in Dronning Maud Land (EDML) in the Atlantic Sector of the East Antarctic Plateau, covering the transition from the last glacial age (LGA) to the early Holocene (26 600-7500 yr BP). Additionally, samples from potential source areas (PSAs) for Antarctic dust were analysed for their REE characteristics. The dust provenance is discussed by comparing the REE fingerprints in the ice core and the PSAs samples. We find a shift in REE composition at 15 200 yr BP in the ice core samples. Before 15 200 yr BP, the dust composition is very uniform and its provenance was likely to be dominated by a South American source. After 15 200 yr BP, multiple sources such as Australia and New Zealand become relatively more important, albeit South America is possibly still an important dust supplier. A similar change in the dust characteristics was observed in the EPICA Dome C ice core at around ~15 000 yr BP. A return to more glacial dust characteristics between ~8300 and ~7500 yr BP, as observed in the EPICA Dome C core, could not be observed in the EDML core. Consequently, the dust provenance at the two sites must have been different at that time.
    Keywords: EDML; EDRILL; EPICA; EPICA-Campaigns; EPICA drill; EPICA Dronning Maud Land, DML28C01_00; European Project for Ice Coring in Antarctica; Kohnen Station
    Type: Dataset
    Format: application/zip, 2 datasets
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    DATA PANGAEA
  • 5
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    EPICA Dronning Maud Land EDML ice core drilling protocol (2014)
    PANGAEA
    In:  Supplement to: Wilhelms, Frank; Miller, Heinz; Gerasimoff, Michael D; Drücker, Cord; Frenzel, Andreas; Fritzsche, Diedrich; Grobe, Hannes; Hansen, Steffen Bo; Hilmarsson, Sverrir Æ; Hoffmann, Georg; Hörnby, Kerstin; Jaeschke, Andrea; Jakobsdottir, Steinunn S; Juckschat, Paul; Karsten, Achim; Karsten, Lorenz; Kaufmann, Patrik R; Karlin, Torbjörn; Kohlberg, Eberhard; Kleffel, Guido; Lambrecht, Anja; Lambrecht, Astrid; Lawer, Gunther; Schärmeli, Ivan; Schmitt, Jochen; Sheldon, Simon G; Takata, Morimasa; Trenke, Marcus; Twarloh, Birthe; Valero Delgado, Fernando; Wilhelms-Dick, Dorothee (2014): The EPICA Dronning Maud Land deep drilling operation. Annals of Glaciology, 55(68), 355-366, https://doi.org/10.3189/2014AoG68A189
    Details
    Publication Date: 2023-06-27
    Description: We report on the EPICA Dronning Maud Land (East Antarctica) deep drilling operation. Starting with the scientific questions that led to the outline of the EPICA project, we introduce the setting of sister drillings at NorthGRIP and EPICA Dome C within the European ice-coring community. The progress of the drilling operation is described within the context of three parallel, deep-drilling operations, the problems that occurred and the solutions we developed. Modified procedures are described, such as the monitoring of penetration rate via cable weight rather than motor torque, and modifications to the system (e.g. closing the openings at the lower end of the outer barrel to reduce the risk of immersing the drill in highly concentrated chip suspension). Parameters of the drilling (e.g. core-break force, cutter pitch, chips balance, liquid level, core production rate and piece number) are discussed. We also review the operational mode, particularly in the context of achieved core length and piece length, which have to be optimized for drilling efficiency and core quality respectively. We conclude with recommendations addressing the design of the chip-collection openings and strictly limiting the cable-load drop with respect to the load at the start of the run.
    Keywords: Break strength; Comment; Core length; Density, mass density; DEPTH, ice/snow; EDML; EDRILL; EPICA; EPICA-Campaigns; EPICA drill; EPICA Dronning Maud Land, DML28C01_00; European Project for Ice Coring in Antarctica; Kohnen Station; Level; Mass; Number; Pitch, lower limit; Pitch, upper limit; Run; Run Date/Time; Temperature, technical; Volume
    Type: Dataset
    Format: text/tab-separated-values, 14880 data points
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    DATA PANGAEA
  • 6
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    Mineralogical assemblage in sediment core GeoB12309-5 (5cm resolution) (2013)
    PANGAEA
    Details
    Publication Date: 2023-06-27
    Keywords: AGE; Amphibole; Aragonite; Barite; Calcite; Calcite/Dolomite ratio; Calculated; Carbonates; Center for Marine Environmental Sciences; Chlorite; DEPTH, sediment/rock; Dolomite; Epidote; Garnet; GC; GC10; GeoB; GeoB12309-5; Geosciences, University of Bremen; Gravity corer; Gypsum; Illite+mica; Illite 10Å/Micas 5Å, ratio of integrated intensities; Iron oxide; Kalifeldspar; Kalifeldspar/Plagioclase ratio; Kaolinite; Kaolinite (3.56-3.58Å)/Chlorite (3.50-3.54Å), ratio of integrated intensities; M74/3; Magnetite; MARUM; Meteor (1986); Mixed layer clay minerals; Montmorillonite; OMZ 950; Phyllosilicate; Plagioclase; Pyrite, FeS2; Pyroxene; Quartz; Quartz/Feldspar ratio; Quartz/Phyllosillicates ratio; Siderite; Sodium chloride; X-ray diffraction (XRD); Zeolite
    Type: Dataset
    Format: text/tab-separated-values, 3131 data points
    Location Call Number Limitation Availability
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    DATA PANGAEA
  • 7
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    Rare earth element concentration EDML ice core
    PANGAEA
    Details
    Publication Date: 2023-06-27
    Keywords: AGE; Cerium; DEPTH, ice/snow; Dysprosium; EDML; EDRILL; EPICA; EPICA-Campaigns; EPICA drill; EPICA Dronning Maud Land, DML28C01_00; Erbium; European Project for Ice Coring in Antarctica; Europium; Gadolinium; Holmium; Inductively coupled plasma-sector field-mass spectrometry (ICP-SF-MS); Kohnen Station; Lanthanum; Lutetium; Neodymium; Praseodymium; Samarium; Terbium; Thulium; Ytterbium
    Type: Dataset
    Format: text/tab-separated-values, 5570 data points
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    DATA PANGAEA
  • 8
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    Characterication of metals in hemolymph and tissues of the Antarctic bivalve Laternula elliptica (2013)
    PANGAEA
    In:  Supplement to: Poigner, Harald; Monien, Patrick; Monien, Donata; Kriews, Michael; Brumsack, Hans-Jürgen; Wilhelms-Dick, Dorothee; Abele, Doris (2013): Influence of the porewater geochemistry on Fe and Mn assimilation in Laternula elliptica at King George Island (Antarctica). Estuarine, Coastal and Shelf Science, 135, 285-295, https://doi.org/10.1016/j.ecss.2013.10.027
    Details
    Publication Date: 2023-10-28
    Description: A high input of lithogenic sediment from glaciers was assumed to be responsible for high Fe and Mn contents in the Antarctic soft shell clam Laternula elliptica at King George Island. Indeed, withdrawal experiments indicated a strong influence of environmental Fe concentrations on Fe contents in bivalve hemolymph, but no significant differences in hemolymph and tissue concentrations were found among two sites of high and lower input of lithogenic debris. Comparing Fe and Mn concentrations of porewater, bottom water, and hemolymph from sampling sites, Mn appears to be assimilated as dissolved species, whereas Fe apparently precipitates as ferrihydrite within the oxic sediment or bottom water layer prior to assimilation by the bivalve. Hence, we attribute the high variability of Fe and Mn accumulation in tissues of L. elliptica around Antarctica to differences in the geochemical environment of the sediment and the resulting Fe and Mn flux across the benthic boundary.
    Keywords: Aluminium, gills tissue; Barium, haemolymph fluid and hemocytes; Biological sample; BIOS; Cadmium, digestive gland tissue; Calcium, digestive gland tissue; Calcium, gill tissue; Calcium, haemolymph fluid and hemocytes; Calcium, mantle tissue; Carlini/Jubany Station; Chromium, haemolymph fluid and hemocytes; Cobalt, haemolymph fluid and hemocytes; Copper, digestive gland tissue; Copper, gill tissue; Copper, haemolymph fluid and hemocytes; DATE/TIME; Depth, bathymetric; DEPTH, sediment/rock; Dry weight, valves; Fresh weight, complete; Fresh weight, valves; Hemocystes; ICP-OES, Inductively coupled plasma - optical emission spectrometry; IMCOAST/IMCONet; Impact of climate induced glacier melt on marine coastal systems, Antarctica; Inductively coupled plasma - mass spectrometry (ICP-MS); Iron, digestive gland tissue; Iron, gill tissue; Iron, haemolymph fluid and hemocytes; Iron, mantle tissue; Jubany_Dallmann; King George Island, Antarctic Peninsula; Laternula_HEC_2010; Laternula elliptica, height of valve; Laternula elliptica, length of valve; Laternula elliptica, width of valve; LATITUDE; LONGITUDE; Magnesium, digestive gland tissue; Magnesium, gill tissue; Magnesium, haemolymph fluid and hemocytes; Magnesium, mantle tissue; Manganese, gill tissue; Manganese, haemolymph fluid and hemocytes; Neubauer haemocytometer, improved; Nickel, haemolymph fluid and hemocytes; Phosphorus, haemolymph fluid and hemocytes; Potassium, digestive gland tissue; Potassium, gill tissue; Potassium, haemolymph fluid and hemocytes; Potassium, mantle tissue; Priority Programme 1158 Antarctic Research with Comparable Investigations in Arctic Sea Ice Areas; Sample ID; Sodium, haemolymph fluid and hemocytes; SPP1158; Strontium, digestive gland tissue; Strontium, gill tissue; Strontium, haemolymph fluid and hemocytes; Strontium, mantle tissue; Vernier caliper; Zinc, digestive gland tissue; Zinc, gill tissue; Zinc, haemolymph fluid and hemocytes; Zinc, mantle tissue
    Type: Dataset
    Format: text/tab-separated-values, 1538 data points
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    DATA PANGAEA
  • 9
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    Mineralogical assemblage in sediment core GeoB12309-5 (laminae resolution) (2013)
    PANGAEA
    Details
    Publication Date: 2023-12-01
    Keywords: Amphibole; Aragonite; Barite; Calcite; Calcite/Dolomite ratio; Calculated; Carbonates; Center for Marine Environmental Sciences; Chlorite; DEPTH, sediment/rock; Dolomite; Epidote; Garnet; GC; GC10; GeoB; GeoB12309-5; Geosciences, University of Bremen; Gravity corer; Gypsum; Illite+mica; Illite 10Å/Micas 5Å, ratio of integrated intensities; Iron oxide; Kalifeldspar; Kalifeldspar/Plagioclase ratio; Kaolinite; Kaolinite (3.56-3.58Å)/Chlorite (3.50-3.54Å), ratio of integrated intensities; Lamina type; M74/3; Magnetite; MARUM; Meteor (1986); Mixed layer clay minerals; Montmorillonite; OMZ 950; Phyllosilicate; Plagioclase; Pyrite, FeS2; Pyroxene; Quartz; Quartz/Feldspar ratio; Quartz/Phyllosillicates ratio; Siderite; Sodium chloride; X-ray diffraction (XRD); Zeolite
    Type: Dataset
    Format: text/tab-separated-values, 2272 data points
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  • 10
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    Chemical composition of sediment core GeoB12309-5 from the northern Arabian Sea, its pore water profile and age depth relationship as well as CTD data obtained during cruise M74/3 (2013)
    PANGAEA
    In:  Supplement to: Wilhelms-Dick, Dorothee; Hanebuth, Till J J; Zonneveld, Karin A F; Röhl, Ursula; Kuhn, Gerhard; Kriews, Michael; Gerstmann, Udo; Kasten, Sabine (submitted): Variability and extent of the oxygen minimum zone in the northern Arabian Sea during the late Holocene.
    Details
    Publication Date: 2024-02-16
    Description: The Arabian Sea off the Pakistan continental margin is characterized by one of the world's largest oxygen minimum zones (OMZ). The lithology and geochemistry of a 5.3 m long gravity core retrieved from the lower boundary of the modern OMZ (956 m water depth) were used to identify late Holocene changes in oceanographic conditions and the vertical extent of the OMZ. While the lower part of the core (535 - 465 cm, 5.04 - 4.45 cal kyr BP, Unit 3) is strongly bioturbated indicating oxic bottom water conditions, the upper part of the core (284 - 0 cm, 2.87 cal kyr BP to present, Unit 1) shows distinct and well-preserved lamination, suggesting anoxic bottom waters. The transitional interval from 465 to 284 cm (4.45 - 2.87 cal kyr BP, Unit 2) contains relicts of lamination which are in part intensely bioturbated. These fluctuations in bioturbation intensity suggest repetitive changes between anoxic and oxic/suboxic bottom-water conditions between 4.45 - 2.87 cal kyr BP. Barium excess (Baex) and total organic carbon (TOC) contents do not explain whether the increased TOC contents found in Unit 1 are the result of better preservation due to low BWO concentrations or if the decreased BWO concentration is a result of increased productivity. Changes in salinity and temperature of the outflowing water from the Red Sea during the Holocene influenced the water column stratification and probably affected the depth of the lower boundary of the OMZ in the northern Arabian Sea. Even if we cannot prove certain scenarios, we propose that the observed downward shift of the lower boundary of the OMZ was also impacted by a weakened Somali Current and a reduced transport of oxygen-rich Indian Central Water into the Arabian Sea, both as a response to decreased summer insolation and the continuous southward shift of the Intertropical Convergence Zone during the late Holocene.
    Keywords: Center for Marine Environmental Sciences; GC; GC10; GeoB; GeoB12309-5; Geosciences, University of Bremen; Gravity corer; M74/3; MARUM; Meteor (1986); OMZ 950
    Type: Dataset
    Format: application/zip, 3 datasets
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