cometadata/datacite-titles-descriptions-related-identifiers huggingface dataset:
DOI: 10.1594/pangaea.769773
title: Osmium concentrations and isotope ratios of ODP Hole 207-1260B and the Furlo section

description: Oceanic anoxic events (OAEs) were episodes of widespread marine anoxia during which large amounts of organic carbon were buried on the ocean floor under oxygen-deficient bottom waters (Schlanger and Jenkyns, 1976; Schlanger et al., 1987). OAE2, occurring at the Cenomanian/Turonian boundary (about 93.5 Myr ago) (Gradstein et al., 2004), is the most widespread and best defined OAE of the mid-Cretaceous. Although the enhanced burial of organic matter can be explained either through increased primary productivity or enhanced preservation scenarios (Schlanger and Jenkyns, 1976; Schlanger et al., 1987). the actual trigger mechanism, corresponding closely to the onset of these episodes of increased carbon sequestration, has not been clearly identified. It has been postulated that large-scale magmatic activity initially triggered OAE2 (Sinton and Duncan, 1997; Kerr, 1998, doi:10.1144/gsjgs.155.4.0619), but a direct proxy of magmatism preserved in the sedimentary record coinciding closely with the onset of OAE2 has not yet been found. Here we report seawater osmium isotope ratios in organic-rich sediments from two distant sites. We find that at both study sites the marine osmium isotope record changes abruptly just at or before the onset of OAE2. Using a simple two-component mixing equation, we calculate that over 97 per cent of the total osmium content in contemporaneous seawater at both sites is magmatic in origin, a ~30–50-fold increase relative to pre-OAE conditions. Furthermore, the magmatic osmium isotope signal appears slightly before the OAE2 -as indicated by carbon isotope ratios- suggesting a time-lag of up to ~23 kyr between magmatism and the onset of significant organic carbon burial, which may reflect the reaction time of the global ocean system. Our marine osmium isotope data are indicative of a widespread magmatic pulse at the onset of OAE2, which may have triggered the subsequent deposition of large amounts of organic matter.
description: Sediment depth is given in mcd.
description: Supplement to: Turgeon, Steven C; Creaser, Robert A (2008): Cretaceous oceanic anoxic event 2 triggered by a massive magmatic episode. Nature, 454(7202), 323-327
DOI: 10.1594/pangaea.772129
title: (Table 1) Osmium concentrations and isotopic ratios for ODP Leg 125 peridotites

description: Mantle peridotites drilled from the Izu-Bonin-Mariana forearc have unradiogenic 187Os/188Os ratios (0.1193 to 0.1273), which give Proterozoic model ages of 820 to 1230 million years ago. If these peridotites are residues from magmatism during the initiation of subduction 40 to 48 million years ago, then the mantle that melted was much more depleted in incompatible elements than the source of mid-ocean ridge basalts (MORB). This result indicates that osmium isotopes record information about ancient melting events in the convecting upper mantle not recorded by incompatible lithophile isotope tracers. Subduction zones may be a graveyard for ancient depleted mantle material, and portions of the convecting upper mantle may be less radiogenic in osmium isotopes than previously recognized.
description: In the model age calculation, the peridotite is assumed to contain no Re, and therefore the 187Os/188Os ratio of the peridotite has not changed because the Re was extracted during an ancient melting event. The age is calculated from the time in the past that the measured 187Os/188Os ratio intersects a chondritic Re-Os evolution curve with a present-day 187Os/188Os ratio of 0.12757 and a 187Re/188Os ratio of 0.3972 (Walker et al., 1989, doi:10.1016/0016-7037(89)90240-8). Recent work suggests that the putative primitive upper mantle has an 187Os/188Os ratio of 0.1290 and a 187Re/188Os ratio of 0.423 (Meisel er al., 1996, doi:10.1038/383517a0). Using these parameters gives slightly older (100 Ma) model ages but does not affect our conclusions. For Al2O3 data see Parkinson and Pearce (1998) dataset: doi:10.1594/PANGAEA.772276.
description: Supplement to: Parkinson, Ian J; Hawkesworth, Chris J; Cohen, Anthony S (1998): Ancient mantle in a modern arc: Osmium Iiotopes in Izu-Bonin-Mariana forearc peridotites. Science, 281(5385), 2011-2013
DOI: 10.1594/pangaea.785721
title: (Table S8) Re-Os analyses of sediment leaches and associated age corrections for ODP Hole 113-690C and DSDP Holes 86-577A and 74-525A
DOI: 10.1594/pangaea.802441
title: (Table 1) 10 Beryllium and CaCO3 at DSDP Holes 86-576B, 86-576, and 86-578

description: Extension of the 10Be geochronology for deep-sea sediments beyond the limit of late Pliocene age found in published works has been attempted. The results obtained on sediments from Deep Sea Drilling Project (DSDP) Sites 576 and 578 of Leg 86 suggest the feasibility of dating sediments as old as 12 to 15 m.y. At both sites, there have been large changes in sedimentation rate, with the Pleistocene sediments accumulating several times faster than those of the Pliocene, which in turn were deposited several times more rapidly than the late Miocene sediments. The Pleistocene-Pliocene section is considerably thicker in Hole 578 than in Hole 576B: the respective depths for the 7 m.y. time boundary in the two holes are about 125 and about 25 m. These 10Be-based age estimates are in agreement with the paleomagnetic stratigraphies established for the two sites. The suggested enhancement in the oceanic deposition of 10Be before 7 to 9 m.y. ago, as noticed in manganese crusts, has found tentative support from the present sedimentary records. A preliminary search for 10Be production variation during a geomagnetic field reversal has been conducted. In Hole 578, an enhanced 10Be concentration is found in a sample close to the Brunhes/Matuyama reversal boundary. More detailed and systematic measurements are required to confirm this observation, which bears on the detailed behavior of the geomagnetic field during the reversal.
description: Supplement to: Ku, Teh-Lung; Southon, John R; Vogel, John S; Liang, Z C; Kusakabe, M; Nelson, D Erle (1985): 10Be distributions in Deep Sea Drilling Project Site 576 and Site 578 sediments studied by accelerator mass spectrometry. In: Heath GR; Burckle LH; et al. (eds.), Initial Reports of the Deep Sea Drilling Project, Washington (U.S. Govt. Printing Office), 86, 539-546
DOI: 10.1594/pangaea.884060
title: Beryllium 10 (10Be) concentrations from till in the western Swiss lowlands

description: During the Pleistocene, glaciers advanced repeatedly from the Alps onto the Swiss Plateau. Numeric age control for the last glaciation is good and thus the area is well suited to test a method which has so far not been applied to till in Switzerland. In this study, we apply in situ produced cosmogenic 10Be depth profile dating to several till deposits. Three sites lie inside the assumed Last Glacial Maximum (LGM) extent of the Rhône and Aare glaciers (Bern, Deisswil, Steinhof) and two lie outside (Niederbuchsiten, St. Urban). All sites are strongly affected by denudation, and all sites have reached steady state, i.e., the 10Be production is in equilibrium with radioactive decay and denudational losses. Deposition ages can therefore not be well constrained. Assuming constant denudation rates of 5 cm/kyr, total denudation on the order of 100 cm for sites within the extent of the LGM and up to tens of meters for older moraines are calculated. Denudation events, for example related to periglacial conditions during the LGM, mitigate the need to invoke such massive denudation and could help to explain high 10Be concentrations at great depths, which we here dub "pseudo-inheritance". This term should be used to distinguish conceptionally from "true inheritance", i.e., high concentrations derived from the catchment.
description: Supplement to: Wüthrich, Lorenz; Brändli, Claudio; Braucher, Régis; Veit, Heinz; Haghipour, Negar; Terrizzano, Carla; Christl, Marcus; Gnägi, Christian; Zech, Roland (2017): 10Be depth profiles in glacial sediments on the Swiss Plateau: deposition age, denudation and (pseudo-) inheritance. E&G - Eiszeitalter und Gegenwart - Quaternary Science Journal, 66(2), 57-68
DOI: 10.1594/pangaea.785722
title: (Table S8) Re-Os analyses of sediment leaches and associated age corrections for the Bottaccione Section, Gubbio
DOI: 10.1594/pangaea.56087
title: GISP2 Ar, Kr, and Xe data

description: The dominant affect on these values is believed to be gravitational fractionation during the gas occlusion process. Last 3 samples are from silty ice; their Kr/Ar and Xe/Ar ratios are affected by geochemical proc other than gravitational frac.
DOI: 10.1594/pangaea.711306
title: (Table 3) Concentrations and isotopic ratios of thorium and uranium in sediments at Site EW9209-1JPC
DOI: 10.1594/pangaea.711307
title: (Table 3) Concentrations and isotopic ratios of thorium and uranium in sediments at Site EW9209-3JPC
DOI: 10.1594/pangaea.720933
title: (Table 3) Argon and neodymium analyses of ODP Site 145-884
DOI: 10.1594/pangaea.723613
title: (Table 2a) Isotopic composition of He, Ne, Ar and Kr of pillow lava in DSDP sites
DOI: 10.1594/pangaea.782642
title: Lead content for sediment core 370530-5
DOI: 10.1594/pangaea.769829
title: Helium concentrations of ODP Hole 121-757B
DOI: 10.1594/pangaea.812229
title: (Table S1) He isotope ratios from Bottaccione Gorge
DOI: 10.1594/pangaea.786706
title: (Table 1) Helium and argon within fluid inclusions in precipitates from subsurface samples of ODP Sites 193-1188 and 193-1189
DOI: 10.1594/pangaea.704727
title: (Table 1) U-Pb zircon results of diatexite G8-57.4 from Mt. Blowaway, northern Oates Coast

description: Calibration error of reference zircon: 1.20% (n=18)
DOI: 10.1594/pangaea.704728
title: (Table 2) U-Pb monazite results of diatexite G8-57.4 from Mt. Blowaway, northern Oates Coast

description: No 1-9: Session 1, calibration error of reference monazite: Pb/U 1.03%; Pb/Th 1.27% (n=9). No 10-16: Session 2, calibration error of reference monazite: Pb/U 0.78%; Pb/Th 1.37% (n=8)
DOI: 10.1594/pangaea.767480
title: Hafnium isotope composition of zircons in ODP Hole 188-1167A sample 1167 A-19
DOI: 10.1594/pangaea.786515
title: (Table 1) Osmium isotope ratios and Re-Os element content in bulk sediments of ODP Hole 121-758A

description: Sediment depth is given in mcd.
DOI: 10.1594/pangaea.712088
title: (Table 1) Osmium isotopic ratios and Os and Re concentrations of leachates and bulk sediment from ODP Hole 116-717C

description: Age calculated from Gartner (1990, doi:10.2973/odp.proc.sr.116.122.1990) corrected according to Cande and Kent (1992, doi:10.1029/92JB01202)
DOI: 10.1594/pangaea.767481
title: Hafnium isotope composition of zircons in ODP Hole 188-1167A sample 1167 A-22
DOI: 10.1594/pangaea.712089
title: (Table 1) Osmium isotopic ratios and Os and Re concentrations of leachates and bulk sediment from ODP Hole 116-718C

description: Age calculated from Gartner (1990, doi:10.2973/odp.proc.sr.116.122.1990) corrected according to Cande and Kent (1992, doi:10.1029/92JB01202)
DOI: 10.1594/pangaea.712957
title: (Table 1) Helium measured by crushing on gabbros from ODP Hole 118-735B

description: Sample description in Hart et al. (1999) datasets: doi:10.1594/PANGAEA.708204
DOI: 10.1594/pangaea.712958
title: (Table 2) Helium and neaon measured by step heating on gabbros of ODP Hole 118-735B

description: Sample description in Hart et al. (1999) datasets: doi:10.1594/PANGAEA.708204
DOI: 10.1594/pangaea.777324
title: (Table 1) 3He/4He and 4He/20Ne ratios of gases exolved from deep-sea sediments of the Japan Sea
DOI: 10.1594/pangaea.777328
title: (Table 3) Corrected 3He/4He ratios of gases exolved from deep-sea sediments of the Japan Sea
DOI: 10.1594/pangaea.788246
title: (Table 2) Results of U-Pb SHRIMP isotopic study of zircons from amphibolites of the Kamchatksky Cape Peninsula
DOI: 10.1594/pangaea.815331
title: (Table 2) Unspiked leachates 187Os/188Os ratios from DSDP Hole 64-480
DOI: 10.1594/pangaea.815335
title: (Table 4) Bulk sediment 187Os/188Os ratios from ODP Site 138-849
DOI: 10.1594/pangaea.843779
title: Uranium, thorium, and protactinium isotopic records of sediment core GeoB3808-6
DOI: 10.1594/pangaea.711768
title: (Table 1) Th and U concentrations and activity ratios in deep-sea sediments at ODP Hole 105-646B

description: The Labrador Sea is a particularly suitable high-latitude basin for investigating U and Th behavior in deep-sea sediments. During the late Quaternary, the cyclic development and decay of huge ice sheets on adjacent land masses resulted in large-amplitude changes in sedimentation rates and organic paleoproductivities. The resulting magnification of U and Th response is well illustrated by high-resolution studies on piston-cored sediments from the Greenland continental rise at Ocean Drilling Program Leg 105 Site 646 spanning isotopic stages 8 to 1. Our results show a clear positive correlation of 238U/232Th ratios with organic paleoproductivity indicators (e.g., dinocyst) due to U uptake in the water column and/or during the early early diagenesis of organic matter responding to carbon fluxes and to their climate forcing. 230Th excesses over 234U exceed the theoretical value of the 230Th rain from the overlying water column, indicating lateral input possibly from the Greenland slope and shelf. Because these horizontal fluxes of 230Th may be partly controlled by physical parameters, 230Th excesses cannot be unequivocally correlated with sedimentation rates and/or productivity as reported elsewhere. In this subarctic basin characterized by low overall organic carbon burial, the 238U/232Th ratio appears to be a sensible geochemical indicator of organic activity and paleoproductivity.
description: Age data have been obtained by interpolation between 18O stage boundaries.
DOI: 10.1594/pangaea.858788
title: Total (dissolved + particulate) Pb-210 and Po-210 specific activities in seawater during POLARSTERN cruise ARK-XXVII/3
DOI: 10.1594/pangaea.832391
title: (Table 1) Re-Os isotope records of partial dissolution samples of ODP Site 159-959

description: DEPTH, sediment/rock [m] is given in mbsf.
DOI: 10.1594/pangaea.832392
title: (Table S1) Os isotope records of bulk sediment samples of ODP Site 159-959

description: DEPTH, sediment/rock [m] is given in mbsf.
DOI: 10.1594/pangaea.848891
title: (Table 4) Noble gas concentrations and He, Ne, Ar, Kr, and Xe isotopic ratios for three particles from the DF2641 layer (Dome Fuji ice core)

description: Blanks and noble gas data on fusion crusts from chondritic meteorites are shown for comparison.
DOI: 10.1594/pangaea.823120
title: (Tab 1) He isotope, U/Th isotope, Calcium carbonate, biogenic opal and rare earth element concentrations measured on core-top sediments during SONNE cruise SO202 (INOPEX)
DOI: 10.1594/pangaea.861940
title: (Table 2, page 308) 9Be concentration, specific activty of 10Be and 10Be/9Be atomic ratio in manganese nodules from the Pacific Ocean

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.
DOI: 10.1594/pangaea.895616
title: Detrial Zircon dating of the Stac Fada Member and wider Stoer Group, northwest Scotland
DOI: 10.1594/pangaea.895617
title: Detrial Apatite dating of the Stac Fada Member and wider Stoer Group, northwest Scotland
DOI: 10.1594/pangaea.763199
title: Uranium, Thorium and Protactinium isotopes of ODP Site 172-1063

description: Ocean circulation may have undergone reductions and reinvigorations in the past closely tied to regional climate changes. Measurements of 231Pa/230Th ratios in a sediment core from the Bermuda Rise have been interpreted as evidence that the Atlantic Meridional Overturning Circulation (AMOC) was weakened or completely eliminated during a period of catastrophic iceberg discharges (Heinrich-Event 1, H1). Here we present new data from the Bermuda Rise that show further 231Pa/230Th peaks during Heinrich-2 (H2) and Heinrich-3 (H3). Additionally, a tight correlation between diatom abundances (biogenic silica) and 231Pa/230Th is discovered in this core. Our results redirect the interpretation of 231Pa/230Th from the Bermuda Rise as a proxy for ocean circulation towards a proxy that reacts highly sensitive to changes of particle composition and water mass properties.
description: Sediment depth is given in mcd. AGE (ka) is an improvement of an astronomical tuned timescale [Grützner et al., 2002, doi:10.1016/S0025-3227(02)00320-1], now based on high resolution CaCO3 data derived from XRF core scanning. The carbonate record for ODP Site 1063 shows a high similarity to the CaCO3 content in the nearby piston core GPC 5 [Keigwin and Jones, 1994, doi:10.1029/94JC00525]. Correlation of CaCO3 was used to transfer the radiocarbon-based age model of GPC 5 to ODP Site 1063. The 21 radiocarbon dates reported by Keigwin and Jones [1994] for the last 36 kyr have been converted to calendar ages as described by Fairbanks et al. [2005, doi:10.1016/j.quascirev.2005.04.007]. This data sets extends the study by McManus et al. 2004 (doi:10.1038/nature02494) from the nearby core GGC5 back to 35 ka, covering H2 and H3.
description: Supplement to: Lippold, Jörg; Gruetzner, Jens; Winter, Diane M; Lahaye, Yann; Mangini, Augusto; Christl, Marcus (2009): Does sedimentary 231Pa/230Th from the Bermuda Rise monitor past Atlantic Meridional Overtuning Circulation? Geophysical Research Letters, 36, L12601
DOI: 10.1594/pangaea.880005
title: (Tables 1, page 1384) Osmium concentration and isotopic composition of North Pacific deep-sea sediments determined after treatment by NiS fusion

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.
DOI: 10.1594/pangaea.880006
title: (Tables 1, page 1384) Osmium concentration and isotopic composition of North Pacific deep-sea ferromanganese nodules and sediments determined after treatment by oxalic acid leaching

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.
DOI: 10.1594/pangaea.956106
title: Collection of species list for functional classification of reef communities along German coasts

description: In order to functionally classify reef communities along German coasts, we have collected species lists of reefs censused, quality-controlled the identification of about 800 benthic species and assigned them functional traits. Functional classification was done according to the concept proposed earlier (Wahl 2009, Franz et al. 2021). The combination of the 5-7 functional traits defined the functional group a given taxonomic unit belongs to. Based on functional groups instead of taxonomic units (i.e. species) we will calculate the functional diversity (richness of functional groups) and functional redundnacy (number of species in single functional groups) of the 150+ reefs censused to date. Functional diversity describes the number of different trait combinations present in a reef and, consequently, the grain size of ecosystem functioning. Functional redundancy is a proxy for the functional robustness in a reef, i.e. the probability that a given trait combination persists after the disappearance of a single member (i.e. species) of this functional group.
description: The data files contain species list including taxonomic identy, functional traits, functional groups, reef characteristics and sampling information. The associated metadata sheet informs about the meaning of the column heads.
DOI: 10.1594/pangaea.972140
title: Particulate amino acid and carbohydrates and particulate organic carbon and nitrogen in suspended and sinking organic matter from METEOR cruise M160

description: We collected in situ marine snow aggregates with a Marine Snow Catcher (MSC). The MSC allows studying the composition of suspended and fast-sinking organic matter from intact in situ formed aggregates (Riley et al. 2012). After deployment, the MSC was left vertically on deck for three hours, seawater containing suspended organic matter was collected from the top part of the MSC and fast-sinking organic matter was picked manually from the MSC base. The MSC was deployed within the mixed layer depth. Duplicate samples for particulate organic carbon (POC) and organic nitrogen (PON) were filtered onto pre-combusted (450 ◦C for 5 h) Whatman GF/F filters (25 mm, 0.7 µm) under low pressure (&lt; 200 mbar). Filters were frozen at −20 °C and stored until analysis. Prior to analysis, filters were acid-fumed (37% HCl for 24 h) in order to remove inorganic carbon and dried at 40°C for 24 h. Subsequently, filters were wrapped in tin cups (8×8×15 mm), combusted and analyzed according to Sharp (1974) using an elemental analyzer (Euro EA). We determined high-molecular-weight (&gt;1 kDa) particulate combined carbohydrates (pCCHO) based on Engel and Händel (2011) and particulate hydrolysable amino acids (pHAA) based on Lindroth and Mopper (1979) and Dittmar et al., (2009). The analysis of pCCHO detected 11 monomers: and the pHAA analysis classified 13 monomers. The calculations for the carbon and nitrogen contents of pCCHO and pHAA were based on carbon and nitrogen atoms contained in the identified monomers.