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  • 1
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    Sediment geochemical and stable isotope data of sediment core GPC04 at the Ninetyeast Ridge, Indian Ocean (2023)
    PANGAEA
    Details
    Publication Date: 2023-11-03
    Description: We investigated benthic foraminifera in cores GPC03 and GPC04 in the northeast tropical Indian Ocean (TIO) over the past ~450 ka to evaluate the ballasting effect of particulate organic matter (POM) and the long-term zonal change during the mid-Brunhes dissolution interval (MBDI). Today, interannual climate and oceanographic variability in the TIO is governed by the Indian Ocean Dipole (IOD), which manifests as asymmetric zonal oceanographic change. Here we provide our sediment geochemical, stable oxygen and carbon isotope data and faunal data of benthic foraminifera in core GPC04.
    Keywords: AGE; Aluminium oxide; Bay of Bengal; Benthic foraminifera; Calcium oxide; DEPTH, sediment/rock; HI1808_GPC04; Iron oxide, Fe2O3; Isotope ratio mass spectrometry; Magnesium oxide; Major element; Manganese oxide; Oxygen isotope stratigraphy; Hidden Markov Model (HMM); PC; Phosphorus pentoxide; Piston corer; Potassium oxide; Principal component analyses (PCA); Principal component loading of PC axis 1; Silicon dioxide; Sodium oxide; Stable carbon and oxygen isotopes; Sulfur; Titanium dioxide; Trilobatus sacculifer, δ13C; Trilobatus sacculifer, δ18O; X-ray fluorescence (XRF), discrete measurement
    Type: Dataset
    Format: text/tab-separated-values, 1364 data points
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  • 2
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    Occurrences of fossil benthic foraminifera in sediment core GPC04 at the Ninetyeast Ridge, Indian Ocean (2023)
    PANGAEA
    Details
    Publication Date: 2023-11-03
    Description: We investigated benthic foraminifera in cores GPC03 and GPC04 in the northeast tropical Indian Ocean (TIO) over the past ~450 ka to evaluate the ballasting effect of particulate organic matter (POM) and the long-term zonal change during the mid-Brunhes dissolution interval (MBDI). Today, interannual climate and oceanographic variability in the TIO is governed by the Indian Ocean Dipole (IOD), which manifests as asymmetric zonal oceanographic change. Here we provide our sediment geochemical, stable oxygen and carbon isotope data and faunal data of benthic foraminifera in core GPC04.
    Keywords: Ammobaculites sp.; Anomalinoides sp.; Anomalinoides spissiformis; Astrononion echolsi; Bay of Bengal; Benthic foraminifera; Bolivina sp.; Brizalina pacifica; Brizalina seminuda; Brizalina striatula; Bulimina alazanensis; Bulimina striata; Bulimina tenuata; Buliminella exilis; Cassidulina sp.; Cassidulinoides akitaensis; Chilostomella ovoidea; Cibicidina sp.; Cibicidoides bradyi; Cibicidoides mundulus; Cibicidoides renzi; Cibicidoides sp.; Cibicidoides wuellerstorfi; Counting 〉105 µm fraction; Dentalina sp.; DEPTH, sediment/rock; Discorbinella sp.; Eggerella bradyi; Ehrenbergina carinata; Eilohedra levicula; Epistominella exigua; Fissurina spp.; Foraminifera, benthic, total; Foraminifera, benthic agglutinated; Foraminifera, benthic hyaline; Foraminifera, benthic porcelaneous; Fursenkoina bradyi; Fursenkoina sp.; Glandulina sp.; Globobulimina pacifica; Globobulimina sp.; Globocassidulina subglobosa; Glomospira gordialis; Gyroidinoides globosus; Gyroidinoides soldanii; Gyroidinoides sp.; Gyroidinoides subangulatus; Haplophragmoides sp.; Heronallenia sp.; HI1808_GPC04; Hoeglundina elegans; Ionella sp.; Karreriella subglabra; Lagena spp.; Laticarinina pauperata; Lenticulina sp.; Linaresina semicribratus; Major element; Martinottiella communis; Melonis barleeanus; Melonis pompilioides; Miliammina sp.; Nodosaria spp.; Nonion affine; Nonionellina sp.; Nuttallides umbonifer; Oolina hexagona; Oolina melo; Oridorsalis plummerae; Oridorsalis umbonatus; Paracassidulina carinata; Paracassidulina neocarinata; PC; Piston corer; Planulina ariminensis; Pleurostomella sp.; Polymorphina sp.; Pullenia bulloides; Pullenia jarvisi; Pullenia subcarinata; Pyrgo cf. murrhina; Pyrgo murrhina; Pyrolinoides acuminatus; Quinqueloculina akneriana; Quinqueloculina elongata; Quinqueloculina seminulum; Quinqueloculina sp.; Recurvoides sp.; Reophax sp.; Reussella pacifica; Rhabdammina sp.; Siphonaperta sp.; Siphouvigerina ampullacea; Sphaeroidina bulloides; Spirosigmoilina sp.; Spirosigmoilinella sp.; Split; Stable carbon and oxygen isotopes; Stainforthia fusiformis; Stilostomella sp.; Textularia sp.; Tosaia sp.; Triloculina trigonola; Uvigerina dirupta; Uvigerina hispida; Uvigerina peregrina; Uvigerina proboscidea; Valvalabamina depressa; Valvulina sp.; Virgulina sp.
    Type: Dataset
    Format: text/tab-separated-values, 11766 data points
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  • 3
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    Radiocarbon age data of sediment cores collected along a 131.5°W transect (2024)
    PANGAEA
    Details
    Publication Date: 2024-03-12
    Keywords: Age, 14C calibrated; Age, AMS 14C conventional; Age, dated; Age, dated standard deviation; Calendar age; DEPTH, sediment/rock; Eolian dust; Event label; Geochemistry; Intertropical Convergence Zone; KODOS05-01; KODOS05-01_MC5107; KODOS05-01_MC5108; KODOS05-01_MC5109; KODOS05-01_MC5110; KODOS05-01_MC5111; KODOS05-01_MC5118; KODOS05-01_PC5104; MC5107; MC5108; MC5109; MC5110; MC5111; MC5118; MUC; MultiCorer; Neodymium isotope; North Pacific Ocean; Onnuri; PC; PC5104; Piston corer
    Type: Dataset
    Format: text/tab-separated-values, 54 data points
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  • 4
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    δ18O of Pulleniatina obliquiloculata from sediment core MC5111 (2024)
    PANGAEA
    Details
    Publication Date: 2024-03-12
    Keywords: DEPTH, sediment/rock; Eolian dust; Geochemistry; Inductively coupled plasma - mass spectrometry (ICP-MS); Intertropical Convergence Zone; KODOS05-01; KODOS05-01_MC5111; MC5111; MUC; MultiCorer; Neodymium isotope; North Pacific Ocean; Onnuri; Pulleniatina obliquiloculata, δ18O
    Type: Dataset
    Format: text/tab-separated-values, 47 data points
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  • 5
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    Geochemical composition of inorganic silicate fractions separated from sediment cores collected along a 131.5°W transect (2024)
    PANGAEA
    Details
    Publication Date: 2024-03-12
    Keywords: DEPTH, sediment/rock; Eolian dust; Event label; Geochemistry; Intertropical Convergence Zone; KODOS05-01; KODOS05-01_MC5107; KODOS05-01_MC5108; KODOS05-01_MC5109; KODOS05-01_MC5110; KODOS05-01_MC5111; KODOS05-01_MC5118; KODOS05-01_PC5104; Lanthanum; MC5107; MC5108; MC5109; MC5110; MC5111; MC5118; MUC; MultiCorer; Neodymium-143/Neodymium-144 ratio; Neodymium-143/Neodymium-144 ratio, standard deviation; Neodymium isotope; North Pacific Ocean; Onnuri; PC; PC5104; Piston corer; Scandium; Thorium; Ytterbium; ε-Neodymium
    Type: Dataset
    Format: text/tab-separated-values, 84 data points
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  • 6
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    Geochemical composition of inorganic silicate fraction of surface sediment samples collected along a 131.5°W transect in the central Pacific (2021)
    PANGAEA
    Details
    Publication Date: 2024-02-12
    Description: This dataset includes neodymium isotope ratios and La, Yb, Sc, and Th concentrations of inorganic silicate fractions of surface sediments from the central Pacific, with relevant sampling information. The aim of the study is to identify latitudinal changes in hemispheric dust provenance. 16 sediment cores were collected along a 131.5°W transect from the equator to 16°N at ~1º intervals using a multiple corer and a piston corer on the R/V Onnuri during KODOS03-03 cruise (2003.07.03-2003.08.01; Chief Scientist: Woong-Seo Kim) and KODOS05-01 cruise (2005.07.17-2005.08.15; Chief Scientist: Woong-Seo Kim). Subsamples were taken at 1 cm intervals from the split cores, and those obtained within the top 10 cm of the cores (usually within the top 3 cm) were used to extract the inorganic silicate fraction. The inorganic silicate fractions of bulk sediments were isolated by sequential dissolution with 25% acetic acid, hot sodium citrate-sodium dithionite solution buffered with sodium bicarbonate, and hot sodium hydroxide solution. The elemental composition of the inorganic silicate fraction was determined using a quadrupole ICP-MS following conventional acid digestion. 143Nd/144Nd ratios were determined via multi-collector thermal ionization mass spectrometer using standard cation exchange techniques.
    Keywords: Calculated, PAAS-normalized; Core; Cruise/expedition; DATE/TIME; DEPTH, water; Depth comment; Eolian dust; Event label; ICP-Q-MS; Inductively coupled plasma-quadrupole-mass spectrometry; KODOS03-03; KODOS03-03_MC03-03-N12; KODOS03-03_MC03-03-N13; KODOS03-03_MC03-03-N14; KODOS03-03_MC03-03-N16; KODOS03-03_MC03-03-N8; KODOS05-01; KODOS05-01_MC5107; KODOS05-01_MC5108; KODOS05-01_MC5109; KODOS05-01_MC5110; KODOS05-01_MC5111; KODOS05-01_MC5112; KODOS05-01_MC5114; KODOS05-01_MC5115; KODOS05-01_MC5117; KODOS05-01_MC5118; KODOS05-01_PC5104; Lanthanum; Lanthanum/Ytterbium ratio; LATITUDE; LONGITUDE; MC03-03-N12; MC03-03-N13; MC03-03-N14; MC03-03-N16; MC03-03-N8; MC5107; MC5108; MC5109; MC5110; MC5111; MC5112; MC5114; MC5115; MC5117; MC5118; MUC; Multi-collector thermal ionization mass spectrometer (TIMS); MultiCorer; Neodymium-143/Neodymium-144 ratio; Neodymium-143/Neodymium-144 ratio, standard deviation; Neodymium isotopes; North Pacific Ocean; Onnuri; PC; PC5104; Piston corer; Rare earth elements; Scandium; Thorium; Ytterbium; ε-Neodymium
    Type: Dataset
    Format: text/tab-separated-values, 176 data points
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  • 7
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    Geochemistry and age data of the down-core sediments collected along 131.5°W transect at the central equatorial Pacific (2024)
    PANGAEA
    Details
    Publication Date: 2024-03-12
    Description: This dataset includes geochemical composition of inorganic silicate fractions separated from down-core sediments from the central Pacific, with relevant sampling information and radiocarbon and stable oxygen isotope data underlying the age model. The aim of the study is to track position of the Intertropical Convergence Zone during the Last Glacial Maximum and Heinrich Stadial 1 based on the latitudinal changes in hemispheric dust provenance. 7 sediment cores were collected along a 131.5°W transect from the equator to 6°N at ~1º intervals using a multiple corer and a piston corer on the R/V Onnuri during KODOS03-03 cruise (2003.07.03-2003.08.01; Chief Scientist: Woong-Seo Kim) and KODOS05-01 cruise (2005.07.17-2005.08.15; Chief Scientist: Woong-Seo Kim). Subsamples were taken at 1 cm intervals from the split cores, and planktic foraminifera was picked from one to five subsamples per each core for radiocarbon dating. Radiocarbon ages were obtained by AMS, and were calibrated to calender years before present. For one sediment core (MC5111), oxygen isotope ratios (δ18O) of planktic foraminifer, P. obliquiloculata (355–425 μm, ~10 specimens) were measured to supplement radiocarbon ages using IRMS. The inorganic silicate fractions were isolated from bulk sediments by sequential dissolution with 25% acetic acid, hot sodium citrate-sodium dithionite solution buffered with sodium bicarbonate, and hot sodium hydroxide solution. The elemental composition of the inorganic silicate fraction was determined using a quadrupole ICP-MS following conventional acid digestion. 143Nd/144Nd ratios were determined via multi-collector thermal ionization mass spectrometer using standard cation exchange techniques.
    Keywords: Eolian dust; Geochemistry; Intertropical Convergence Zone; Neodymium isotope
    Type: Dataset
    Format: application/zip, 3 datasets
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  • 8
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    Sedimentary perspectives of Pleistocene ocean circulation and climate change from the southernmost Chilean continental margin (2019)
    American Geophysical Union
    In:  EPIC3AGU Centennial Fall Meeting, San Francisco, CA, USA, 2019-12-09-2019-12-13American Geophysical Union
    Details
    Publication Date: 2020-05-14
    Description: IODP Exp. 383 recovered two Pleistocene sedimentary sequences from the upper continental slope along the southernmost Chilean margin that are well positioned to monitor changes in the Antarctic Circumpolar Current (ACC) upstream of the Drake Passage and the history of Patagonian glaciation. These sites are characterized by high sedimentation rates and a complex distribution of siliciclastic sediments with infrequent decimeter-scale beds of calcareous biogenic sediments. Unravelling ocean circulation and climate history from these sites requires a primary understanding of sedimentary provenance and transport mechanisms derived from a complete lithological characterization of the sequence. Here, we integrate downcore shipboard physical properties with sedimentological observations to fully characterize the sequences, evaluate potential for correlation and constrain regional depositional processes. Site U1542 (52°S; 1101 m water depth) consists of a 249 m spliced sedimentary sequence containing Middle Pleistocene to Holocene sediments. It mainly consists of clayey silt that is often interbedded with thin (~75 cm) beds of calcareous sand-bearing clayey to sandy silt with foraminifera and nannofossils or foraminifera-rich nannofossil ooze. Site U1544 (55°S; 2090 m water depth) consists of a 98 m sedimentary sequence obtained from a single hole. Sediments are also dominated by silty clay, but exhibit slightly thicker beds of calcareous ooze and a significantly higher proportion of cm- to dm-scale sand beds that are interpreted as turbidites. Based on the lithology of the recovered sediments and proximity to a glaciated continental margin, terrigenous sediment is likely delivered to these locations by a combination of ice rafting, glacial meltwater plumes, episodic downslope transport from the outer continental shelf and fine-grained sediments transported by the Cape Horn Current entering the Drake Passage as the northern branch of the ACC.
    Repository Name: EPIC Alfred Wegener Institut
    Type: Conference , notRev
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  • 9
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    Variability in Particle Mixing Rates in Sediments with Polymetallic Nodules in the Equatorial Eastern Pacific as Determined from Measurements of Excess 210Pb (2018)
    Springer
    Details
    Publication Date: 2018-06-01
    Print ISSN: 1738-5261
    Electronic ISSN: 2005-7172
    Topics: Geosciences
    Published by Springer
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    PAPER CURRENT
  • 10
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    Resource Assessment of Polymetallic Nodules Using Acoustic Backscatter Intensity Data from the Korean Exploration Area, Northeastern Equatorial Pacific (2018)
    Springer
    Details
    Publication Date: 2018-06-01
    Print ISSN: 1738-5261
    Electronic ISSN: 2005-7172
    Topics: Geosciences
    Published by Springer
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