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  • 2020-2024  (61)
  • 1995-1999  (9)
  • 1975-1979  (1)
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  • 1
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    Unknown
    An astronomically dated record of Earth's climate and its predictability over the last 66 million years (2021)
    AAAS
    Details
    Publication Date: 2023-10-26
    Description: Much of our understanding of Earth's past climate comes from the measurement of oxygen and carbon isotope variations in deep-sea benthic foraminifera. Yet, long intervals in existing records lack the temporal resolution and age control needed to thoroughly categorize climate states of the Cenozoic era and to study their dynamics. Here, we present a new, highly resolved, astronomically dated, continuous composite of benthic foraminifer isotope records developed in our laboratories. Four climate states-Hothouse, Warmhouse, Coolhouse, Icehouse-are identified on the basis of their distinctive response to astronomical forcing depending on greenhouse gas concentrations and polar ice sheet volume. Statistical analysis of the nonlinear behavior encoded in our record reveals the key role that polar ice volume plays in the predictability of Cenozoic climate dynamics.
    Description: Published
    Description: 1383–1387
    Description: 5A. Ricerche polari e paleoclima
    Description: JCR Journal
    Repository Name: Istituto Nazionale di Geofisica e Vulcanologia (INGV)
    Type: article
    Location Call Number Limitation Availability
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    PAPER (OA)
  • 2
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    An astronomically dated record of Earth’s climate and its predictability over the last 66 Million Years (2020)
    AAAS (American Association for the Advancement of Science)
    Details
    Publication Date: 2023-02-08
    Description: Much of our understanding of Earth’s past climate comes from the measurement of oxygen and carbon isotope variations in deep-sea benthic foraminifera. Yet, long intervals in existing records lack the temporal resolution and age control needed to thoroughly categorize climate states of the Cenozoic era and to study their dynamics. Here, we present a new, highly resolved, astronomically dated, continuous composite of benthic foraminifer isotope records developed in our laboratories. Four climate states—Hothouse, Warmhouse, Coolhouse, Icehouse—are identified on the basis of their distinctive response to astronomical forcing depending on greenhouse gas concentrations and polar ice sheet volume. Statistical analysis of the nonlinear behavior encoded in our record reveals the key role that polar ice volume plays in the predictability of Cenozoic climate dynamics.
    Type: Article , PeerReviewed
    Format: text
    Format: text
    Format: other
    Location Call Number Limitation Availability
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    OceanRep: Article in a Scientific Journal - peer-reviewed
  • 3
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    Biogenic barium flux in the eastern equatorial Pacific Ocean (2020)
    PANGAEA
    Details
    Publication Date: 2023-02-08
    Description: We present the first regional-scale records of biogenic Barium (xsBa) fluxes in the Panama basin of the eastern-equatorial margin of the Pacific Ocean in order to assess xsBa as a paleoproductivity proxy. Measurements of xsBa from thirteen cores that range in water depths from about 700 ¬¬to 3000 m show an increase in 230Th normalized xsBa mass accumulation rates (MARs) with increasing water depth during both Marine Oxygen Isotope Stages (MIS) 1 and 2. The correlation of xsBa MARs with depth are strong despite differences in bulk sediment mass accumulation rates and differing degrees of sediment redistribution. We interpret the increasing xsBa with water depth as likely due to the continued decomposition and remineralization of falling and/or resuspended biogenic particles. xsBa does not seem to be affected by diagenetic sulfate reduction in most of the cores. Calculated estimates of xsBa preservation in the sediment pile are high and fluctuate between 45% - 52% throughout the last 25 kyr. Although xsBa fluxes can be a robust indicator of paleoproductivity, caution is needed if a) there is evidence of sulfate reduction in sediments being analyzed, and b) one is trying to quantify differences in paleoproductivity among sites that are located at different depths in the water column.
    Keywords: 230Th; AGE; Aluminium; authigenic Uranium (Uauth); Barite dissolution; Barium; Barium excess; Biogenic Barium (xsBa); DEPTH, sediment/rock; Eastern Equatorial Pacific Ocean; Event label; Latitude of event; Longitude of event; Melville; MUC; MultiCorer; MV1014; MV1014-01-1MC; MV1014-01-7MC; MV1014-02-16MC; MV1014-02-9MC; paleoproductivity; Panama Basin
    Type: Dataset
    Format: text/tab-separated-values, 124 data points
    Location Call Number Limitation Availability
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    DATA PANGAEA
  • 4
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    Chemical composition of manganese crusts dredged near the Galapagos Rift (Pleiades Leg 2 cruise of R/V Melville) (2022)
    PANGAEA
    Details
    Publication Date: 2023-08-28
    Description: The samples analysed were dredged on Pleiades Leg II during a program of heat flow measurements, bottom photography and coring. They are located on topographic mounds in a band 20 km south of the Galapagos Rift on sediments ranging from 20 to 30 m in thickness. The dredge hauls were sampled to represent the diversity of dredged material either Mn encrusted altered basalt or relatively thick Mn coating deposited directly in contact with sediments. Each sample was analysed by atomic absorption spectrophotometry for major elemnts and instrumental neutron activation analysis for minor elements or rare earths.
    Keywords: Aluminium; Antimony; Arsenic; Atomic absorption spectrophotometry; Barium; Calcium; Cerium; Chromium; Cobalt; Copper; Deposit type; Dredge, pipe; DRG_P; Elevation of event; Europium; Event label; Geochemistry; Hafnium; Identification; Instrumental neutron activation analysis (INAA); Iron; Lanthanum; Latitude of event; Longitude of event; Lutetium; Magnesium; Manganese; manganese micronodule; manganese nodule; Melville; Minerals; Neodymium; Nickel; NOAA and MMS Marine Minerals Geochemical Database; NOAA-MMS; ocean; Pacific Ocean; PLDS02MV-003D; PLDS02MV-004D; PLDS02MV-005D; PLDS02MV-007D; PLDS-2; Pleiades; Potassium; Samarium; Scandium; sediment; Silicon; Sodium; Substrate type; Terbium; Thorium; Ytterbium; Zinc
    Type: Dataset
    Format: text/tab-separated-values, 467 data points
    Location Call Number Limitation Availability
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    DATA PANGAEA
  • 5
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    Radiochemical data for a manganese nodule sample from the MN7601-PLEIADES campaign (R/V Melville) (2023)
    PANGAEA
    Details
    Publication Date: 2023-08-28
    Description: Using radiochemical methods, the authors have measured the distribution of uranium, thorium, radium, polonium and protactinium isotopes from the top and bottom sides of the a manganese nodule from Station 20 of the PLEIADES Mn7601 campaign. This "apple" shaped nodule (6.5x3.0 cm) was laying on a bed of siliceous ooze (see illustrations). Successive thin layers of the nodule were carefully scraped from the surface of the measured area with a sharp surgical blade. All samples reduced to powder were air-dried at 110°C for at least two hours before analysis. The relative gross alpha activities from each layer were assayed by Alpha spectrometry using a thick-source counting in a scintillation counter.
    Keywords: Alpha spectrometry; BC; Box corer; Deposit type; DEPTH, sediment/rock; DISTANCE; Distance, maximum; Distance, minimum; Elevation of event; Event label; Geochemistry; Identification; Latitude of event; Longitude of event; manganese micronodule; manganese nodule; Melville; MN76-01, Pleiades; NOAA and MMS Marine Minerals Geochemical Database; NOAA-MMS; ocean; Pacific Ocean; PLDS04MV-109BX; PLDS-4; Polonium-210; Protactinium-231; Protactinium-231 excess; Protactinium-231 excess, standard deviation; Radium-226; Sample type; sediment; Thorium-228; Thorium-230; Thorium-230 excess; Thorium-230 excess, standard deviation; Thorium-232; Uranium-234; Uranium-238
    Type: Dataset
    Format: text/tab-separated-values, 218 data points
    Location Call Number Limitation Availability
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    DATA PANGAEA
  • 6
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    Microprobe analysis of a manganese nodule sample from the MN7601-PLEIADES campaign (R/V Melville) (2023)
    PANGAEA
    Details
    Publication Date: 2023-08-28
    Description: The authors have selected for analysis a manganese nodule from Station 20 of the PLEIADES Mn7601 campaign. This "apple" shaped nodule (6.5x3.0 cm) was laying on a bed of siliceous ooze (see illustrations). Electron microprobe measurements were made on the same section as that used in the alpha-track studies. Prior to the microprobe analyses, however, the nodule slab was highly polished to reduce surface relief A MAC electron microprobe was employed and the electron beam was focused to a dmmeter of about 2 micrometers using 15 kV and 300 mA.
    Keywords: Aluminium oxide; Barium oxide; BC; Box corer; Calcium oxide; Cobalt oxide; Copper(II) oxide; Deposit type; DEPTH, sediment/rock; Distance; Elevation of event; Event label; Geochemistry; Identification; Iron oxide, Fe2O3; Latitude of event; Longitude of event; Magnesium oxide; Manganese dioxide; manganese micronodule; manganese nodule; Melville; Microprobe; MN76-01, Pleiades; Nickel oxide; NOAA and MMS Marine Minerals Geochemical Database; NOAA-MMS; ocean; Pacific Ocean; PLDS04MV-109BX; PLDS-4; Potassium oxide; Sample type; sediment; Silicon dioxide; Sodium oxide; Titanium dioxide
    Type: Dataset
    Format: text/tab-separated-values, 543 data points
    Location Call Number Limitation Availability
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    DATA PANGAEA
  • 7
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    Chemical composition of a manganese nodule sample from the MN7601-PLEIADES campaign (R/V Melville) (2023)
    PANGAEA
    Details
    Publication Date: 2023-08-28
    Description: The authors have selected for analysis a manganese nodule from Station 20 of the PLEIADES Mn7601 campaign. This "apple" shaped nodule (6.5x3.0 cm) was laying on a bed of siliceous ooze (see illustrations). Successive thin layers of the nodule were carefully scraped from the surface of the measured area with a sharp surgical blade. All samples reduced to powder were air-dried at 110°C for at least two hours before analysis. The chemical composition of (1) the top 3-5 mm, (2) the bottom 3-5 mm, and (3) the bulk nodule from a section of Mn7601-20-2 adjacent to the portion used for the radiochemical studies was determined by atomic absorption and neutron activation analysis.
    Keywords: Aluminium; Antimony; Atomic absorption spectrophotometry; Barium; BC; Box corer; Calcium; Cerium; Cobalt; Copper; Deposit type; DEPTH, sediment/rock; DISTANCE; Elevation of event; Europium; Event label; Geochemistry; Hafnium; Holmium; Identification; Iron; Lanthanum; Latitude of event; Longitude of event; Lutetium; Manganese; manganese micronodule; manganese nodule; Melville; MN76-01, Pleiades; Neodymium; Neutron activation analysis; Nickel; NOAA and MMS Marine Minerals Geochemical Database; NOAA-MMS; ocean; Pacific Ocean; PLDS04MV-109BX; PLDS-4; Samarium; Sample type; Scandium; sediment; Silicon; Terbium; Thorium; Uranium; Ytterbium; Zinc
    Type: Dataset
    Format: text/tab-separated-values, 81 data points
    Location Call Number Limitation Availability
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    DATA PANGAEA
  • 8
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    Descriptions of 59 box and gravity cores from the MANOP cruise with RV KNORR in 1979 (1979)
    PANGAEA
    In:  Scripps Institution of Oceanography, UC San Diego
    Details
    Publication Date: 2023-09-25
    Description: 59 box and gravity cores from the MANOP cruise with RV KNORR in 1979 were described and alaysed.
    Type: Dataset
    Format: application/zip, 59 datasets
    Location Call Number Limitation Availability
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    DATA PANGAEA
  • 9
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    Unknown
    MANOP Site H manganese nodules and crusts chemical composition determined by atomic absorption spectrometry (AAS) (2023)
    PANGAEA
    Details
    Publication Date: 2023-11-23
    Description: Manganese nodules and crusts were sampled from box cores collected at the Manganese Nodule Program (MANOP) site H in the Eastern Equatorial Pacific ocean. For majority of site H nodule bottoms have smooth, lustrous patches, whereas nodule tops are generally rough and dull. The top/bottom orientation of each manganese nodule was labeled during curation. Most of the nodutes studied were cut in haIf, and a 3-5 mm layer was scraped from nodule tops and bottoms. The chemical analysis was performed on both top and bottom sides as well as on the whole specimen. Atomic absorption spectrometry (AAS) was used folIowing complete dissolution with HF and aqua regia in teflon bombs.
    Keywords: Aluminium; Atomic absorption spectrophotometry; Barium; BC; Box corer; Calcium; Cobalt; Copper; Deposit type; DEPTH, sediment/rock; Dredge, rock; DRG_R; East Pacific Ocean; Elevation of event; Event label; Geochemistry; Identification; Indomed_leg_1; INMD01-26BX_B1 (MANOP Site H); INMD01-27BX_B5 (MANOP Site H); INMD01-34BX_B5 (MANOP Site H); INMD01-36BX_B3 (MANOP Site H); INMD-26BX_B1; INMD-27BX_B5; INMD-34BX_B5; INMD-36BX_B3; Iron; Latitude of event; Longitude of event; Magnesium; Manganese; manganese micronodule; manganese nodule; MANOP Site H, Pacific Ocean; Melville; Nickel; NOAA and MMS Marine Minerals Geochemical Database; NOAA-MMS; ocean; Pacific Ocean; PLTO03MV; PLUTO-3; PLUTO-3-11D; PLUTO III (MANOP Site H); Potassium; Sample code/label; Sample type; sediment; Silicon; Sodium; Titanium; VLCN-1; VLCN-1-37BC; VLCN-1-40BX; VLCN-1-48BC; VLCN-1-50BC; VLCN-1-52BX; VLCN-1-55BX; VLCN-1-66BX; VLCN-1-68BX; VLCN-1-69BC; VULCAN Leg 1; Zinc
    Type: Dataset
    Format: text/tab-separated-values, 1326 data points
    Location Call Number Limitation Availability
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    DATA PANGAEA
  • 10
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    Unknown
    MANOP Site H manganese nodules and crusts chemical composition determined by instrumental neutron activation (INAA) (2023)
    PANGAEA
    Details
    Publication Date: 2023-11-23
    Description: Manganese nodules and crusts were sampled from box cores collected at the Manganese Nodule Program (MANOP) site H in the Eastern Equatorial Pacific ocean. For majority of site H nodule bottoms have smooth, lustrous patches, whereas nodule tops are generally rough and dull. The top/bottom orientation of each manganese nodule was labeled during curation. Most of the nodutes studied were cut in haIf, and a 3-5 mm layer was scraped from nodule tops and bottoms. The chemical analysis was performed on both top and bottom sides as well as on the whole specimen. They were analysed at the U.S. Geological Survey, Menlo Park using instrumental neutron activation analysis with high-resolution lithium-drifted germanium detectors. This method involves the meeasurement of gamma-ray emission after proper irradiation of the samples.
    Keywords: Antimony; Barium; BC; Box corer; Chromium; Cobalt; Deposit type; DEPTH, sediment/rock; Dredge, rock; DRG_R; East Pacific Ocean; Elevation of event; Event label; Geochemistry; Hafnium; Identification; Indomed_leg_1; INMD01-26BX_B1 (MANOP Site H); INMD01-27BX_B5 (MANOP Site H); INMD01-34BX_B5 (MANOP Site H); INMD01-36BX_B3 (MANOP Site H); INMD-26BX_B1; INMD-27BX_B5; INMD-34BX_B5; INMD-36BX_B3; Instrumental neutron activation analysis (INAA); Iron; Lanthanum; Latitude of event; Longitude of event; manganese micronodule; manganese nodule; MANOP Site H, Pacific Ocean; Melville; NOAA and MMS Marine Minerals Geochemical Database; NOAA-MMS; ocean; Pacific Ocean; PLTO03MV; PLUTO-3; PLUTO-3-11D; PLUTO III (MANOP Site H); Sample code/label; Sample type; Scandium; sediment; Thorium; Uranium; VLCN-1; VLCN-1-37BC; VLCN-1-52BX; VULCAN Leg 1
    Type: Dataset
    Format: text/tab-separated-values, 448 data points
    Location Call Number Limitation Availability
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    DATA PANGAEA
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