cometadata/datacite-titles-descriptions-related-identifiers huggingface dataset:
DOI: 10.1594/pangaea.915593
title: Calcareous nannofossil fluxes at DSDP Site 74-525 during the past 15 million years

description: This dataset contains calcareous nannofossil flux data at DSDP Site 525 during the past 15 million years. Samples were prepared using the drop technique (Bordiga et al., 2015; doi:10.1016/j.revmic.2015.05.002) and nannofossil abundance was determined under the polarized-light microscope. Fluxes were calculated from the absolute abundances and the site-specific mass accumulation rates (data from Suchéras-Marx and Henderiks (2014; doi:10.1016/j.gloplacha.2014.10.015)) with reproducibility of ±15%.
DOI: 10.1594/pangaea.664674
title: Oceanography at CTD/bottle station IFREMER_1514
DOI: 10.1594/pangaea.686242
title: (Table A3) Distribution of Pleistocene calcareous nannofossil marker species and morphotypes at ODP Site 177-1090 from Agulhas Ridge, South Atlantic

description: Observed at a magnification of 1000X. Abundance of taxa: V = very abundant (&gt;50%), A = abundant (&gt;20-&lt;50 %), C = common (&gt;10-&lt;20%), F = few (&gt;1-&lt;10%), R = rare (&lt;1%), - = absent
DOI: 10.1594/pangaea.884332
title: Occurrence of IRD in ODP Hole 151-909C

description: The Arctic cryosphere is changing and making significant contributions to 21st century sea level rise. The Pliocene epoch had similar CO2 levels to present and a warming comparable to model predictions for the end of this century, providing an opportunity to investigate the operation of Arctic climate in a warm world. The Late Pliocene has well documented climatic conditions. However, the state of the Arctic cryosphere remains partially constrained. Here, for the first time, we couple outputs from a Pliocene climate model with a thermodynamic iceberg model to simulate likely source regions for Ice Rafted Debris (IRD) found in the Nordic Seas from Marine Isotope Stage M2 to the mid Pliocene Warm Period (mPWP). We compare the fraction of melt given by the model scenarios with IRD data from four Ocean Drilling Program (ODP) sites within the Nordic Seas region. Marine sites 911A, 909C and 907A show a persistent occurrence of IRD that modeling results suggest is consistent with permanent ice on Svalbard. Our model results indicate that icebergs sourced from the east coast of Greenland do not reach the Nordic Seas sites during the warm late Pliocene, but instead travel south into the North Atlantic. Small amounts of IRD are found at Hole 642B in the Late Pliocene. Model results identify coastal Norway as the potential source, however this is inconsistent with current understanding of the Late Pliocene Scandinavian climate.
DOI: 10.1594/pangaea.752864
title: Meteorological observations during WEAZLE cruise from St. Thomas to Dominica started at 1777-05-30
DOI: 10.1594/pangaea.712045
title: (Table 1) Chemical and isotopic compositions of rudist aragonite and magnesian calcite cements from ODP Hole 144-877A

description: The classic paleotemperature record based on d18O data from pelagic foraminiferal calcite suggests that equatorial sea-surface temperatures during the Maastrichtian (~12-20°C) were much cooler than today (~27-29°C). Such cool equatorial temperatures contradict basic theories of tropical atmospheric and ocean dynamics. We report d18O data from remarkably well preserved rudist aragonite and magnesian calcite cements of Maastrichtian age (~69+/-1 Ma) from the carbonate platform of Wodejebato guyot in the western Pacific. These data suggest that equatorial sea-surface temperatures in the Maastrichtian (best estimate ~27-32°C) were at least as warm as today. This finding helps reconcile the geologic d18O record with ocean-atmospheric dynamic theory and implies a reduction in the poleward heat flux required by global climate simulations of greenhouse conditions.
description: Zero values mean below detection limit.
DOI: 10.1594/pangaea.721032
title: (Table DR1B) Summary of petrographic data from ODP Hole 139-858G
DOI: 10.1594/pangaea.793496
title: (Table 1) Alkenone concentration, UK'37 index and derived sea surface temperatures for ODP Site 167-1020

description: Uk'37 sea-surface temperature (SST) estimates obtained at ~2.5-k.y. resolution from Ocean Drilling Program Site 1020 show glacial-interglacial cyclicity with an amplitude of 7°-10°C over the last 780 k.y. This record shows a similar pattern of variability to another alkenone-based SST record obtained previously from the Santa Barbara Basin. Both records show that oxygen isotope Stage (OIS) 5.5 was warmer by ~3°C relative to the present and that glacial Uk'37 temperatures warm in advance of deglaciation, as inferred from benthic d18O records. The alkenone-based SST record at Site 1020 is longer than previously published work along the California margin. We show that warmer than present interglacial stages have occurred frequently during the last 800 k.y. Alkenone concentrations, a proxy for coccolithophorid productivity, indicate that sedimentary marine organic carbon content has also varied significantly over this interval, with higher contents during interglacial periods. A baseline shift to warmer SST and greater alkenone content occurs before OIS 13.We compare our results with those from previous multiproxy studies in this region and conclude that SST has increased by ~5°C since the last glacial period (21 ka). Our data show that maximum alkenone SSTs occur simultaneously with minimum ice volume at Site 1020, which is consistent with data from farther south along the margin. The presence of sea ice in the glacial northeast Pacific, the extent of which is inferred from locations of ice-rafted debris, provides further support for our notion of cold surface water within the northern California Current system, averaging 7°-8°C cooler during peak glacial conditions. The cooling of surface water during glacial stages most likely did not result from enhanced upwelling because alkenone concentrations and terrestrial redwood pollen assemblages are consistently lower during glacial periods.
description: Sediment depth is given in mcd.
description: Supplement to: Kreitz, Scott F; Herbert, Timothy D; Schuffert, Jeffrey D (2000): Alkenone paleothermometry and orbital-scale changes in sea-surface temperature at Site 1020 northern California margin. In: Lyle, M; Koizumi, I; Richter, C; Moore, TC Jr (eds.) Proceedings of the Ocean Drilling Program, Scientific Results, College Station, TX (Ocean Drilling Program), 167, 1-9
DOI: 10.1594/pangaea.761998
title: Ultra-violet measurements from station Payerne (2001-03)

description: Version 2, 2011-06-22. UV-b values were originally given in mW/m² and then erroneously imported in W/m² using the same numbers. The numbers have been corrected (divided by 1000) on 2017-01-27. UV reflect values might still contain errors.
DOI: 10.1594/pangaea.789140
title: (Table 1) Proportions of clay minerals and mud, as well as description of sediment at DSDP Hole 93-603B

description: The clay mineralogy of Lower Cretaceous deep-sea fan sediment in the western North Atlantic is dominated by smectite in most intervals, and by illite in samples from intervals of high sand input. Different intervals of high sand input are enriched in kaolinite. Kaolinite and illite levels do not correlate in this sediment, indicating that the input of each clay type was independent and represents either a different provenance or a different depositional mode. The latter hypothesis is preferred because equivalent, continental strata have clay mineral suites dominated in most cases by kaolinite, and in other cases by illite. Only marine strata of eastern North America have expandable clay. Thus under normal conditions in the Early Cretaceous, kaolinite was deposited in continental environments, illite dominated deposition in transitional environments, and smectite was transported to the deep sea. At certain intervals in the Neocomian and Aptian, fine-grained sediment bypassed the shelf and slope and enhanced Lower Cretaceous clay mineral suites in the western North Atlantic. These intervals probably corresponded to turbidity-current activity or continental flooding. Illite-enriched sediment may have been supplied by the outer shelf, whereas kaolinite-enriched intervals may have come from a more nearshore or terrestrial environment.
description: Supplement to: Holmes, Mary Anne (1987): Clay mineralogy of the lower Cretaceous deep-sea fan, Deep Sea Drilling Project Site 603, lower continental rise off North Carolina. In: van Hinte, JE; Wise, SW Jr; et al. (eds.), Initial Reports of the Deep Sea Drilling Project, Washington (U.S. Govt. Printing Office), 93, 1079-1089
DOI: 10.1594/pangaea.753523
title: Documentation of sediment core GeoB14604-1
DOI: 10.1594/pangaea.859299
title: Description of manganese deposits collected by R/V Nothwind during the 1963 expedition in the Laptev sea

description: The 400-km-wide, low gradient Laptev Sea continental shelf consists of flat terrace-like features at regular depth intervals from 10 to 40 m below present sea level. The five large submarine valleys traversing the shelf do not continuously grade seaward, but contain elongated, closed basins. These terraces and closed basins plus deltaic sediments associated with the submarine valleys quite possibly mark sea level Stillstands, and enable reconstruction of the paleogeography of the Laptev Sea shore line at five periods during post-Wisconsin (Holocene) time. Radiocarbon dates on the silty-clay to clayey-silt sediments from cores of the northeastern Laptev Sea indicate average sedimentation intensity of 2 to 15 mg/cm2/yr. The presence of manganese nodules and crusts in surface samples from less than 55 m depths and a general decrease in total foraminiferal abundances with depth in the cores suggest that the present deposition rate is less than when sea level was lower. The main components of the shelf deposits are near- shore sediments which were spread over the shelf as Holocene sea level fluctuated and marine currents distributed modern fine sediment. Rare silty-sand layers and the coarser nuclei of the manganese crusts and nodules indicate ice rafting. However, this mechanism is probably only locally important as a significant transporting agent.
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.
description: Supplement to: Holmes, M L; Creager, Joe S (1974): Holocene History of the Laptev Sea Continental Shelf (Chapter 9). In: Herman, Y. (Ed.) Marine Geology and Oceanography of the Arctic Seas. Springer Berlin Heidelberg, 211-229
DOI: 10.1594/pangaea.821417
title: (Table 1) Summary of magnetic properties and chemical composition of opaque minerals in DSDP Leg 58 Holes basallts

description: The Curie temperature and thermomagnetic behavior of wholerock samples were measured in basalts recovered from Sites 442, 443, and 444 of DSDP Leg 58 in the Shikoku Basin, and from Site 446 in the Daito Basin, north Philippine Sea. Chemical composition and microscopic features of opaque oxides in the same samples were also investigated. Degree and mode of oxidation of titanomagnetite vary irrespective of site, lithology, or magnetic polarity, and no systematic correlation has been found between any two of these characteristics. Magnetic properties are systematically different between massive flows recovered at Hole 444A (Shikoku Basin) and Hole 446A (Daito Basin), although the controlling factor is unknown.
description: Empty cells = no data.
description: Supplement to: Furuta, Toshio; Kobayashi, Kazuo; Momose, K (1980): Magnetic properties of igneous rocks of the Philippine Sea, Deep Sea Drilling Project Leg 58. In: deVries Klein, G; Kobayashi, K; et al. (eds.), Initial Reports of the Deep Sea Drilling Project (U.S. Govt. Printing Office), 58, 923-934
DOI: 10.1594/pangaea.753531
title: Documentation of sediment core GeoB14613-1
DOI: 10.1594/pangaea.867452
title: (Table 4, page 134) Results of Nd isotopic measurements in two layers of a Pacific Ocean manganese nodule (MN139)

description: New data for the direct measurement of the isotopic composition of neodymium in Atlantic Ocean seawater are compared with previous measurements of Pacific Ocean seawater and ferromanganese sediments from major ocean basins. Data for Atlantic seawater are in excellent agreement with Nd isotopic measurements made on Atlantic ferromanganese sediments and are distinctly different from the observed compositions of Pacific samples. These results clearly demonstrate the existence of distinctive differences in the isotopic composition of Nd in the waters of the major ocean basins and are characteristic of the ocean basin sampled. The average eNd(0) values for the major oceans as determined by data from seawater and ferromanganese sediments are as follows: Atlantic Ocean, eNd(0) = -12 ± 2; Indian Ocean, eNd(0) = -8 ± 2; Pacific Ocean, eNd(0) = -3 ± 2. These values are considerably less than eNd(0) value sources with oceanic mantle affinities indicating that the REE in the oceans are dominated by continental sources. The difference in the absolute abundance of 143Nd between the Pacific and Atlantic Oceans corresponds to ab. 10**6 atoms 143Nd per gram of seawater. The correspondence between the 143Nd/144Nd in seawater and in the associated sediments suggests the possible application of this approach to paleo-oceanography. Distinctive differences in eNd(0) values are observed in the Atlantic Ocean between deep-ocean water associated with North Atlantic Deep Water and near-surface water. This suggests that North Atlantic Deep Water may be relatively well mixed with respect to Nd isotopic composition whereas near-surface water may be quite heterogeneous, reflecting different sources for surface waters relative to deep water. This suggests that it may be possible to distinguish the sources of water masses within an ocean basin on the basis of Nd isotopic composition. The Nd isotopic variations in seawater are used to relate the residence time of Nd and mixing rates between the oceans.
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.
description: Supplement to: Piepgras, Donald J; Wasserburg, Gerald J (1980): Neodymium isotopic variations in seawater. Earth and Planetary Science Letters, 50(1), 128-138
DOI: 10.1594/pangaea.823705
title: P-Wave velocity (PWL) from IODP Hole 320-U1332B

description: Geocode = Depth CSF-A (m)
DOI: 10.1594/pangaea.839741
title: Miocene stable isotope record of bulk carbonate from IODP Site 321-U1337

description: DEPTH, sediment/rock is given in mbsf.
DOI: 10.1594/pangaea.723151
title: (Table 1) Sequential variation of carbonate cycles in DSDP Hole 72-516F
DOI: 10.1594/pangaea.763414
title: Strontium, Rubidium and Neodymium isotopic composition of sediments of western Pacific marginal basins (Table 1)

description: The Nd–Sr isotopic signature of fine-grained clastic strata from western Pacific marginal basins has been examined to test the applicability of isotopic fluctuations in basin characterization, stratigraphic correlation, and provenance determinations. Neodymium and strontium isotopic analyses were conducted on Plio–Pleistocene sediments (n = 70) from DSDP/ODP drill cores in the Sea of Japan, Shikoku Basin, and the Sulu Sea. The isotopic values from these basins demonstrate the utility of Nd–Sr isotopic signatures for both interbasinal characterization and provenance evaluation, and intrabasinal stratigraphic correlations. The isotopic signature of the Sulu Sea and the Sea of Japan fluctuates within predictable limits defined by the geology of the source area, and the signature is sensitive to changes in sediment flux from isotopically homogeneous source regions. Isotopic values in the Shikoku Basin deviate strongly from predicted isotopic values with neodymium values significantly lower than expected (epsilon-Nd (-7) to (-9) vs. predicted epsilon-Nd (-2) to (+5)). This isotopically evolved signature could not have been derived from the crustal domains on the basin margins, and requires input from a previously unrecognized source. The isotopic signature of the Shikoku Basin is interpreted to represent aeolian sediment flux into the basin from eastern Eurasia coincident with paleoclimatic change in Late Pliocene to Early Pliestocene time.Stratigraphic isotopic fluctuations within the Shikoku Basin are sharp, spanning five epsilon-Nd units, and roughly synchronous across the topographically complex basin floor. Fluctuations in the isotopic signature are used to correlate drill holes across over 5400 km**2 of basin floor. The isotopic signature of fine-grained sediments reflects the average isotopic composition of the entire source region, and stratigraphic fluctuations in the isotopic signature record variations in the relative importance of isotopically distinct crustal domains through time. Isotopic variations are synchronous across the Shikoku Basin, and are interpreted to reflect episodic basin margin volcanism superimposed on a background of hemipelagic sedimentation with a strong eolian component. Fluctuations in the isotopic signature of basinal strata ultimately result from geologic events on the basin margins and paleoclimatic influences, and may therefore be useful in reconstruction of basin evolution.
description: Supplement to: Mahoney, J Brian (2005): Nd and Sr isotopic signatures of fine-grained clastic sediments: A case study of western Pacific marginal basins. Sedimentary Geology, 182(1-4), 183-199
DOI: 10.1594/pangaea.825621
title: Thermal conductivity of IODP Hole 329-U1371G

description: Geocode = Depth CSF-A (m)
DOI: 10.1594/pangaea.904627
title: Heatwave experiment in Kiel Outdoor Benthocosms, 2015: Labyrinthula zosterae abundance in eelgrass tissue

description: Method: RT-qPCR with species specific primers from eelgrass DNA extracts
DOI: 10.1594/pangaea.704907
title: Organic δ¹³C values, kerogen atomic C/N ratios and relative weights of some kerogen pyrolysis products of ODP Hole 112-682A (Table 1)

description: Carbon isotopic composition of predominantly marine kerogen in latest Oligocene mudstones of the Peru Margin ODP 682A Hole shows an about 3.5 per mil increase with decreasing age. Py-GC and elemental (C=N ratio) analysis of the kerogen plus sulphur isotopic study together with earlier knowledge on geological setting and organic geochemistry results in a better understanding of depositionary environment and allows to separation of the influence of concentration of water dissolved carbon dioxide (ce) on kerogen delta13C from that of other factors (bacterial degradation, sea surface temperature, DIC delta13C, productivity, and admixture of land plant OM). Based on this analysis, the major part of the kerogen shift is considered as a result of the latest Oligocene decrease of marine photosynthetic carbon isotopic fractionation in the Peru Margin photic zone, which in turn possibly reflects a simultaneous drop in atmospheric CO2 level. Uncertainties in the evaluation of the factors affecting the marine photosynthetic carbon isotopic fractionation and the extent of ocean-atmosphere disequilibrium do not permit calculation of the decrease of the atmospheric CO2.
description: Supplement to: Vetó, István; Hertelendi, Ede; Sajgó, Csanád; Brukner-Wein, Alice (1999): Upward increase of kerogen d13C in the Peru Margin Upper Oligocene: possible implications for the Cenozoic evolution of atmospheric CO2. Palaeogeography, Palaeoclimatology, Palaeoecology, 145(1-3), 33-42
DOI: 10.1594/pangaea.826383
title: Thermal conductivity of IODP Hole 329-U1366B

description: Geocode = Depth CSF-A (m)
DOI: 10.1594/pangaea.772172
title: Shear strength measurements from IODP Hole 316-C0004D

description: Geocode = [m CSF-A] Top Core depth (below sea floor)
DOI: 10.1594/pangaea.820249
title: (Table 7) Thermal conductivity DSDP Site 60-456

description: Sediment depth is given in mbsf. Empty cells = no data.
DOI: 10.1594/pangaea.785097
title: (Tables 1, 3) Component composition of organic particles in samples from ODP Site 131-808

description: Analysis of the palynofacies and miospore thermal alteration indices (TAI) of sediments from ODP Site 808 in the Nankai Trough was undertaken to determine (1) the source, depositional environment, and diagenesis of organic matter in the accreted sediments, and (2) the thermal structure and history of the prism and its relationship to fluid flow.Using the Hartax classification system, two palynofacies were recognized in the sedimentary sequence. Facies 1 occurs within the upper 600 m of trench-wedge turbidites (sedimentation rate &gt; 1 km/m.y.) and contains &gt;50% inertite particles. The rest of the assemblage is dominated by well-preserved phytoclasts and contains small amounts of poorly preserved phytoclasts and well-preserved scleratoclasts. Facies 2 occurs within the Shikoku Basin hemipelagites (600-1300 m below seafloor; sedimentation rate &lt;150 m/m.y.) and contains over two-thirds inertite particles. The rest of the assemblage is dominated by poorly preserved phytoclasts. Miospores and marine phytoplankton compose only a small percentage of both palynofacies. Degraded organic matter is most noticeable in Facies 2, whereas its presence in Facies 1 is overshadowed by the high influx of well-preserved primary organic matter. Most of the degraded organic matter and inertite is interpreted to be reworked. Some of the degraded organic matter may be primary, and may have experienced more biodegradation and thermal alteration in Facies 2 than in Facies 1.TAI values indicate an immature stage of organic maturation (&lt; 2) down to about 900 mbsf. Below this, samples show an increase with depth to a mature stage, reaching peak levels of about 3 just above basement. Samples from within the thrust fault and decollement zones do not show levels of maturity significantly greater than those of surrounding samples, leaving uncertain whether hot fluids have migrated along these fault boundaries in the past.
description: Sediment depth is given in mbsf. Zonal assignments are from Olafsson (1993, doi:10.2973/odp.proc.sr.131.103.1993).
description: Supplement to: Firth, John V (1993): Palynofacies and thermal maturation analysis of sediments from the Nankai Trough. In: Hill, IA; Taira, A; Firth, JV; et al. (eds.), Proceedings of the Ocean Drilling Program, Scientific Results, College Station, TX (Ocean Drilling Program), 131, 57-69
DOI: 10.1594/pangaea.733107
title: Stable carbon and oxygen isotope ratios of planktonic foraminifera from sediment core MD99-2336