cometadata/datacite-titles-descriptions-related-identifiers huggingface dataset:
DOI: 10.1594/pangaea.898201
title: Sr, Nd and Pb isotopic signatures and elemental pattern in surface sediments in the Elbe River Estuary in 2015

description: The Elbe River was long considered as one of the most anthropogenically impacted rivers in Europe. Its estuary is characterized by strong tidal effects, continuous dredging and dumping of sediments and intense ship traffic between the North Sea and the Port of Hamburg. These activities make the estuary a highly dynamic study area of interest to numerous parties. The aim of this study was to elucidate if a combined multi-element fingerprinting and isotopic tracer approach represents a suitable tool to investigate transport and mixing processes of inorganic contaminants within a complex and highly dynamic estuarine environment.Therefore, a total of 37 surface sediment samples (&lt;63 µm grain size fraction) of the Elbe River Estuary were characterized in a comprehensive survey by determining the mass fractions of 48 elements and the isotopic signatures of stable Sr, Nd and Pb. By the combination of multi-element and isotopic data, statistical data analysis resolved four discrete clusters of sampling locations in the estuary: One cluster upstream of the city of Hamburg, two clusters within the mixing zone between Hamburg and the mouth of the Elbe Estuary and one cluster in the mouth of the estuary. Our results indicate that river sediments entering the estuary carry significantly higher loads of heavy metals (e.g. Cu, Zn, Sb, Cd and Pb), which are rapidly “diluted” by lower elemental mass fractions in marine sediments on a remarkably small regional scale (investigated river transect: 144 km). The cluster within the mouth of the estuary is mainly characterized by extreme isotopic variations of n(208Pb)/n(204Pb) ranging from 38.67 ± 0.15 to 73.86 ± 0.29, beside high mass fractions of U, Th and some rare-earth elements. Determined Pb isotope ratios are among the highest reported values for terrestrial materials. These extreme variations are unique as they occur on a small spatial scale and cannot be explained by the underlying geology of the Elbe Estuary solely. Hence, it can be assumed that this material is not exclusively original to the area but was transported into the Elbe Estuary either by tidal dynamics or human activities.In summary, this study indicates the general potential of combined element fingerprinting and isotope tracer approaches to elucidate processes in complex river systems. Moreover does it represent an initial characterization of the catchment area of the Elbe River as basis for future studies on river and harbor management.
description: Update 2019-10-18: Element data has been corrected, multiplication by 0.001. In the first version data were wrongly given with a factor of 1000 too high.
description: Supplement to: Reese, Anna; Zimmermann, Tristan; Pröfrock, Daniel; Irrgeher, Johanna (2019): Extreme spatial variation of Sr, Nd and Pb isotopic signatures and 48 element mass fractions in surface sediment of the Elbe River Estuary - Suitable tracers for processes in dynamic environments? Science of the Total Environment, 668, 512-523
DOI: 10.1594/pangaea.908155
title: Protactinium, thorium, uranium and opal of sediment core GeoB1515
DOI: 10.1594/pangaea.706539
title: (Table 3) Isotopic composition of rocks from ODP Hole 135-836B
DOI: 10.1594/pangaea.754607
title: Tab. 1: U-Pb analyses of zircons from rock samples in MT. Newton and Cumpston Massif, East Antarctica

description: We present new U-Pb zircon (SHRIMP) data on rocks from Mt Newton and Cumpston Massif in the southern Prince Charles Mountains. Our data demonstrate that Mt Newton was affected by a newly proposed Palaeoproterozoic "Newton" Orogeny at c. 2100-2200 Ma. Sedimentation, felsic volcanism (c. 2200 Ma), metamorphism and folding, followed by granite intrusion (c. 2100 Ma), suggest development of a trough or aulacogene in the area during the early Palaeoproterozoic. An orthogneiss from Cumpston Massif yielded an age of c. 3180 Ma for granitic protolith emplacement, which is in good agreement with many U-Pb zircon ages from similar rocks in the southern Mawson Escarpment. A syn- to late-tectonic muscovite-bearing pegmatite from Cumpston Massif yielded a c. 2500 Ma date of emplacement, which indicates early Palaeoproterozoic activity in this block, probably in response to a tectono-magmatic episode in the Lambert Terrane bordering the Ruker Terrane in the northeast. The correlation of tectono-magmatic events in both the Ruker and Lambert terranes of the southern Prince Charles Mountains provides evidence for their common evolution during the Proterozoic.
description: Supplement to: Mikhalsky, Evgeny V; Belyatsky, Boris V; Roland, Norbert W (2009): New evidence for palaeoproterozoic tectono-magmatic activities in the southern Prince Charles Mountains, East Antarctica. Polarforschung, 78(3), 85-94
DOI: 10.1594/pangaea.902808
title: Dissolved Hafnium and Neodymium data measured on water samples during METEOR cruise M84/5 in the Bay of Biscay

description: We present dissolved neodymium and hafnium concentrations and radiogenic isotope compositions of surface and deep-water masses from the Bay of Biscay. Neodymium isotope signatures in surface waters of the Bay of Biscay are dominated by local weathering inputs from the surrounding continental margin. Subsurface Eastern North Atlantic Central Water (ENACW) shows a distinct Nd isotope signature (εNd≅‑12.0) at the southwestern-most station and is significantly diluted by mixing with more radiogenic waters on its way north along the European margin. Furthermore, the Nd isotope data clearly show a declining fraction of Mediterranean Outflow Water (MOW) at intermediate depths on its way north indicating that only 40% to 60% of MOW still present in the mixture at the Galician margin arrive at the stations further north in the Bay of Biscay. A potentially seasonal variability of the flow path of MOW is identified when comparing the results of the Nd isotope compositions and salinity data of this study with those of earlier studies from the area.In agreement with Nd isotope and concentration analyses Hf isotope composition of MOW is affected by large-scale inputs of terrigenous material into the Mediterranean as can be deduced from elevated Hf concentrations at the Galician margin. Hf isotope signatures of all water masses of the Bay of Biscay, moreover, are overprinted by local weathering inputs and do not reflect water mass mixing. However, combined dissolved Nd and Hf isotopes serve as a useful indicator of local weathering influences on signatures expected from long distance admixture.
description: Supplement to: Dausmann, Veit; Frank, Martin; Zieringer, Moritz (2020): Water mass mixing versus local weathering inputs along the Bay of Biscay: Evidence from dissolved hafnium and neodymium isotopes. Marine Chemistry, 224, 103844
DOI: 10.1594/pangaea.711297
title: (Table 3) Concentrations and isotopic ratios of thorium and uranium in sediments at ODP Site 177-1088
DOI: 10.1594/pangaea.929664
title: Whole-rock U-Th and Sr-Nd isotope compositions of Ilopango TB suite (Table S9)

description: This dataset includes results from U-series and Sr-Nd whole-rock isotope compositions of the last four explosive silicic eruptions from Ilopango caldera in El Salvador (TBJ, TB2, TB3, and TB4). Sr and Nd isotope ratios were measured with a Nu Instruments thermal ionization mass spectrometer (Nu-TIMS) at Departamento de Geología, Centro de Investigación Científica y de Educación Superior de Ensenada (CICESE) in the state of Baja California (Mexico), whereas U and Th concentrations and isotopes were measured at University of Wyoming (UWYO) were measured by isotope dilution using a ThermoFisher Neptune ICP-MS multicollector.
description: Activity ratios calculated using decay constants of 9.1577 x 10-6 a-1 for 230Th (Cheng et al., 2000), 4.9475 x 10-11 a-1 for 232Th (Le Roux & Glendenin, 1963), 2.8263 x 10-6 a-1 for 234U (Cheng et al., 2000), and 1.55125 x 10-10 a-1 for 238U (Jaffey et al., 1971).BCR-1, TML, AGV-2: relative to reference values from Scott et al. (2019).
DOI: 10.1594/pangaea.920773
title: Beryllium-10 in sediment cores OB16A and OB16B from Orakei maar, Auckland, New Zealand

description: 10Be (atoms/g) and native 9Be (atoms/g) concentrations from sediment of Orakei maar, Auckland, New Zealand, measured at the Centre of Accelerator Science (Australian Nuclear Science and Technology Organisation), Sydney (Australia). 10Be (atoms/g) concentrations from sediment measured at the Laboratory of Ion Beam Physics, ETH Zurich (Switzerland).
DOI: 10.1594/pangaea.70763
title: Crust growth and isotope age, Bellinghausen Sea
DOI: 10.1594/pangaea.932639
title: Lead isotopes in sediment cores JPC15 and JPC27

description: In this dataset we present high resolution Pb isotope records from the Mackenzie Delta area and the Amundsen Gulf. Here we present the authigenic as well as the detrital isotopic composition. With both components it is possible to give an accurate interpretation of meltwater runoff into the Arctic.
DOI: 10.1594/pangaea.957419
title: Seawater carbonate chemistry and bioaccumulation of inorganic and organic mercury in the cuttlefish Sepia officinalis

description: The bioaccumulation of mercury (Hg) in marine organisms through various pathways has not yet been fully explored, particularly in cephalopods. This study utilises radiotracer techniques using the isotope 203Hg to investigate the toxicokinetics and the organotropism of waterborne inorganic Hg (iHg) and dietary inorganic and organic Hg (methylHg, MeHg) in juvenile common cuttlefish Sepia officinalis. The effect of two contrasting CO2 partial pressures in seawater (400 and 1600 μatm, equivalent to pH 8.08 and 7.54 respectively) and two types of prey (fish and shrimp) were tested as potential driving factors of Hg bioaccumulation. After 14 days of waterborne exposure, juvenile cuttlefish showed a stable concentration factor of 709 ± 54 and 893 ± 117 at pH 8.08 and 7.54, respectively. The accumulated dissolved i203Hg was depurated relatively rapidly with a radiotracer biological half-life (Tb1/2) of 44 ± 12 and 55 ± 16 days at pH 8.08 and 7.54, respectively. During the whole exposure period, approximately half of the i203Hg was found in the gills, but i203Hg also increased in the digestive gland. When fed with 203Hg-radiolabelled prey, cuttlefish assimilated almost all the Hg provided (&gt;95%) independently of the prey type. Nevertheless, the prey type played a major role on the depuration kinetics with Hg Tb1/2 approaching infinity in fish fed cuttlefish vs. 25 days in shrimp fed cuttlefish. Such a difference is explained by the different proportion of Hg species in the prey, with fish prey containing more than 80% of MeHg vs. only 30% in shrimp. Four days after ingestion of radiolabelled food, iHg was primarily found in the digestive organs while MeHg was transferred towards the muscular tissues. No significant effect of pH/pCO2 variation was observed during both the waterborne and dietary exposures on the bioaccumulation kinetics and tissue distribution of i203Hg and Me203Hg. Dietary exposure is the predominant pathway of Hg bioaccumulation in juvenile cuttlefish.
description: The cuttlefish come from the Arcachon basin and were brought to the IAEA (4 Quai Antoine 1er, 98000 Monaco), and therefore the water used for the experiments was pumped from the sea water there. In order to allow full comparability with other ocean acidification data sets, the R package seacarb (Gattuso et al, 2022) was used to compute a complete and consistent set of carbonate system variables, as described by Nisumaa et al. (2010). In this dataset the original values were archived in addition with the recalculated parameters (see related PI). The date of carbonate chemistry calculation by seacarb is 2023-04-14.
DOI: 10.1594/pangaea.716892
title: (Appendix Table 1) Hf isotope ratios of basalts from the North Atlantic Igneous Province from several DSDP/ODP holes

description: Lu and Hf concentrations determined by ICP-MS at the Univ. of Durham, except for the samples from Goban Spur (Leg 80), which were determined by INAA at Leicester University. Ages of Leg 163 are from Tegner and Duncan (1999, doi:10.2973/odp.proc.sr.163.108.1999)
DOI: 10.1594/pangaea.860800
title: U-Pb age analyses on zircon grains from Basilika Formation bentonites (Bjørndalen area)

description: LA-ICP-MS analyses on zircon grains from Basilika Formation bentonites (Bjørndalen area). Analyses listed from lowest to highest 206Pb/238U age for &lt;1000 Ma and lowest to highest 207Pb/206Pb age for &gt;1000 Ma. Spot nomenclature follows the scheme x-y.z: with x=sample number, y=grain, z=spot. Disc.: per cent discordance for the given 207Pb/206Pb age. Error correl.: Error correlation coefficient for concordia coordinates. Concordia coordinates: y = 206Pb/238U = EXP(L238*(206-238 Age)) - 1; x = 207Pb/235U = EXP(L235 × (207-235 Age)) - 1; 207Pb/206Pb = 137.88 × x/y; Uranium decay constants (L238 & L235) are from (Jaffey et al., 1971). L238 = 1.55125 × 10-4/Ma; L235 = 9.8485 × 10-4/Ma. Reference: Jaffey, A., K. Flynn, L. Glendenin, W. Bentley, and A. Essling (1971), Precision Measurement of Half-Lives and Specific Activities of 235U and 238U, Phys. Rev. C, 4(5), 1889-1906.
DOI: 10.1594/pangaea.941306
title: Effects of the hydrous domain in the mantle wedge on magma formation and mixing at the Northeast Lau Spreading Centre, SW Pacific

description: Major and trace element concentrations of young volcanic rocks from the Northeast Lau Basin in the SW Pacific Ocean, as well as Sr-Nd-Hf-Pb isotope compositions. Analyses were mainly carried out at the GeoZentrum Nordbayern, University of Erlangen, Germany, where major elements were determined by electrons microprobe on volcanic glasses and by XRF on whole rocks. Trace elements were analyzed by LA ICPMS on glass at the Macquarie University, Sydney, Australia, and by dissolution ICPMS at the GeoZentrum Nordbayern. Water concentrations on glasses were analyzed by SIMS at the Australian National University, Canberra, Australia. Isotope ratios were determined by TIMS and MC ICPMS at the GeoZentrum Nordbayern.
DOI: 10.1594/pangaea.706536
title: (Table 3) Isotopic composition of rocks from ODP Hole 135-834B
DOI: 10.1594/pangaea.711526
title: (Table 1) Os concentrations and 187Os/186Os, 187Os/188Os ratios for DSDP Hole 92-598 metalliferous sediments

description: Further 187OS/186OS data and Os concentrations of bulk sediment see Ravizza (1993) dataset: doi:10.1594/PANGAEA.711521
DOI: 10.1594/pangaea.949943
title: Radiochemical data for layers inside a buried manganese nodule from core CH71-09, HARMATTAN campaign of the R/V Jean Charcot on the Romanche trench area (Atlantic ocean)

description: Radiochemical analyses have been performed on micro-samples extracted from various surface and inside layers of a buried manganese nodule recovered from core CH71-09 at a depth of 10.0 cm. Non manganese oxide parts consisting essentially of the surrounding carbonate sediment inlays have been separated using hydrofluoric acid. After processing the samples have been dissecated at 110 Celsius and prepared as an aliquot from which a part is used for radiometric measurements using Alpha spectrometry and the other part is used for uranium-238 and thorium-232 using co-solvant precipitation.
description: From 1983 until 1989 NOAA-NCEI compiled the NOAA-MMS Marine Minerals Geochemical Database from journal articles, technical reports and unpublished sources from other institutions. At the time it was the most extended data compilation on ferromanganese deposits world wide. Initially published in a proprietary format incompatible with present day standards it was jointly decided by AWI and NOAA to transcribe this legacy data into PANGAEA. This transfer is augmented by a careful checking of the original sources when available and the encoding of ancillary information (sample description, method of analysis...) not present in the NOAA-MMS database.This dataset represents the digitized Table 16, page 113 of the related publication.--It is worth noting that in this table the author has ratioed isotope concentrations (ex: 230TH/232Th) while measuring each of them using inherently different methods (ex: 230Th using Alpha spectrometry and 232Th using Wet chemistry determination). Thus these terms have been labeled as plain "ratio" rather than "activity ratio".
DOI: 10.1594/pangaea.946949
title: Polonium-210 data from West Antarctic Peninsula sediment cores

description: Three sediment cores were collected along the West Antarctic Peninsula during RRS James Clark Ross expedition JR15003. Pb-210 analyses of sediment samples were carried out at GAU-Radioanalytical Laboratories, National Oceanography Centre, Southampton. The samples were measured by alpha spectrometry of Po-210, a proxy method that gives the activity of Pb-210, as Po-210 is a granddaughter of Pb-210 (Appleby, 2008; doi:10.1177/0959683607085598). The sediment samples were almost 2 years old, so it was assumed Pb-210 had reached secular equilibrium with Po-210 (half-life = 138 days) within the sediment (Baskaran, 2011; doi:10.1016/j.jenvrad.2010.10.007 and San Miguel et al., 2002; doi:10.1016/S0168-9002(02)01415-8).
DOI: 10.1594/pangaea.744858
title: (Table 1) Thorium and uranium concentrations and isotope activity ratios in sediment profile HUD85-027-16
DOI: 10.1594/pangaea.890941
title: Composite protactinium/thorium record in sediment cores from North Atlantic Ocean
DOI: 10.1594/pangaea.805957
title: (Table 3) Geochemistry of borehole fluids of ODP Hole 137-504B

description: Circulation of seawater through basaltic basement for several million years after crustal emplacement has been inferred from studies of surface heat flow, and may play a significant role in the exchange of elements between the oceanic crust and seawater. Without direct observation of the fluid chemistry, interpretations regarding the extent and timing of this exchange must be based on the integrated signal of alteration found in sampled basalts. Much interest has thus been expressed in obtaining and analyzing fluids directly from basaltic formations.It has been proposed that open oceanic boreholes can be used as oceanic groundwater wells to obtain fluids that are circulating within the formation. Water samples were collected from the open borehole in Hole 504B prior to drilling operations on Leg 137, with the original intention of collecting formation fluids from the surrounding basaltic rocks. Past results have yielded ambiguous conclusions as to the origin of the fluids recovered-specifically, whether or not the fluids were true formation fluids or merely the result of reaction of seawater in the borehole environment.The chemistry of eight borehole fluid samples collected during Leg 137 is discussed in this paper. Large changes in major, minor, and isotopic compositions relative to unaltered seawater were observed in the borehole fluids. Compositional changes increased with depth in the borehole. The samples exhibit the effect of simple mixing of seawater, throughout the borehole, with a single reacted fluid component. Analysis and interpretation of the results from Leg 137 in light of past results suggest that the chemical signals observed may originate predominantly from reaction with basaltic rubble residing at the bottom of the hole during the interim between drilling legs. Although this endeavor apparently did not recover formation waters, information on the nature of reaction between seawater and basalt at the prevalent temperatures in Hole 504B (&gt;160°C) has been gained that can be related to reconstruction of the alteration history of the oceanic crust. Isotopic analyses allow calculation of element-specific water/rock mass ratios (Li and Sr) and are related to the extent of chemical exchange between the borehole fluids and basalt.
description: Supplement to: Magenheim, Andrew J; Spivack, Arthur J; Alt, Jeffrey C; Bayhurst, Gregory; Chan, Lui-Heung; Zuleger, Evelyn; Gieskes, Joris M (1995): Borehole fluid chemistry in Hole 504B, Leg 137: formation water or in-situ reaction? In: Erzinger, J; Becker, K; Dick, HJB; Stokking, LB (eds.), Proceedings of the Ocean Drilling Program, Scientific Results, College Station, TX (Ocean Drilling Program), 137, 141-152
DOI: 10.1594/pangaea.763775
title: Table 1. Lead and Ba concentrations and Pb isotopic compositions measured in firn core samples from Styx glacier in Victoria Land, Antarctica
DOI: 10.1594/pangaea.763736
title: Appendix 1. Single-zircon Pb evaporation ages from the Djupkilsodden granitoids, north-central Nordaustlandet, Svalbard
DOI: 10.1594/pangaea.767484
title: Hafnium isotope composition of zircons in sediment core AM04 sample AMQ4
DOI: 10.1594/pangaea.940041
title: Blank data for beryllium measurements
DOI: 10.1594/pangaea.711296
title: (Table 3) Concentrations and isotopic ratios of thorium and uranium in sediments at ODP Site 115-716B
DOI: 10.1594/pangaea.943686
title: Beryllium isotopes composition of layers from the bottom side of Mn nodule SO11_262DK (262GBHF)

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.
description: Digitized Table 4b, Page 2405; Points of measurements are illustrated in Fig. 1..From 1983 until 1989 NOAA-NCEI compiled the NOAA-MMS Marine Minerals Geochemical Database from journal articles, technical reports and unpublished sources from other institutions. At the time it was the most extended data compilation on ferromanganese deposits world wide. Initially published in a proprietary format incompatible with present day standards it was jointly decided by AWI and NOAA to transcribe this legacy data into PANGAEA. This transfer is augmented by a careful checking of the original sources when available and the encoding of ancillary information (sample description, method of analysis..) not present in the NOAA-MMS database.
DOI: 10.1594/pangaea.763267
title: Appendix C: Hf-isotope data from zircons in the Beiwu, Linong and Lunong intrusions
DOI: 10.1594/pangaea.710932
title: (Table 3) Results of stepwise degassing experiments and diffusion runs on the magnetic fraction of pelagic clay from Core LR44-GPC-3

description: For all samples duration of each step was 30 min. Mass of the sample was 31 mg.
DOI: 10.1594/pangaea.921475
title: Supplemental Table 2: Compiled mean Sr-Nd-Pb-Hf isotope data of lavas from Serreta Ridge (SR-A) and the N' Serreta Ridge (SR-B) and mean standard analyses
DOI: 10.1594/pangaea.715012
title: (Table 1) Lu-Hf isotope ratios of eolian dust from ODP Hole 145-885A

description: AGE after Rea et al. (1998 doi:10.1029/98PA00123). Sample preparation: without surface cleaning and without bomb fraction. For epsilon-Nd data see Pettke et al. (2000) data set: doi:10.1594/PANGAEA.711040