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  • PANGAEA  (50)
  • Springer Nature  (3)
  • Geological Society of America (GSA)  (1)
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  • 1
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    Two-stepping into the icehouse: East Antarctic weathering during progressive ice-sheet expansion at the Eocene-Oligocene transition (2011)
    Geological Society of America (GSA)
    Details
    Publication Date: 2011-04-01
    Description: In conjunction with increasing benthic foraminiferal {delta}18O values at the Eocene-Oligocene transition (EOT; ca. 34 Ma), coarse-grained ice-rafted debris (IRD; 〉425 {micro}m) appears abruptly alongside fossil fish teeth with continentally derived neodymium (Nd) isotope ratios ({varepsilon}Nd) in Kerguelen Plateau (Southern Ocean) sediments. Increased Antarctic weathering flux, as inferred from two steps to less radiogenic {varepsilon}Nd values, coincides with two steps in benthic foraminiferal {delta}18O values. These results indicate that two distinct surges of weathering were generated by East Antarctic ice growth during the EOT. Weathering by ice sheets during a precursor glaciation at 33.9 Ma did not produce significant IRD accumulation during the first {varepsilon}Nd shift. Glacial weathering was sustained during a terrace interval between the two steps, probably by small high-elevation ice sheets. A large increase in weathering signals the rapid coalescence of small ice sheets into an ice sheet of continental proportions ca. 33.7 Ma. Rapid ice sheet expansion resulted in a suppression of weathering due to less exposed area and colder conditions. Parallel changes in Antarctic weathering flux and deep-sea carbonate accumulation suggest that ice-sheet expansion during the EOT had a direct impact on the global carbon cycle; possible mechanisms include associated changes in silicate weathering on the East Antarctic craton and enhanced fertilization of Southern Ocean waters, both of which warrant further investigation.
    Print ISSN: 0091-7613
    Electronic ISSN: 1943-2682
    Topics: Geosciences
    Published by Geological Society of America (GSA)
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  • 2
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    Onset of Antarctic Circumpolar Current 30 million years ago as Tasmanian Gateway aligned with westerlies (2015)
    Springer Nature
    Details
    Publication Date: 2015-07-01
    Print ISSN: 0028-0836
    Electronic ISSN: 1476-4687
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Published by Springer Nature
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    PAPER CURRENT
  • 3
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    A Cenozoic record of the equatorial Pacific carbonate compensation depth (2012)
    Springer Nature
    Details
    Publication Date: 2012-08-01
    Print ISSN: 0028-0836
    Electronic ISSN: 1476-4687
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Published by Springer Nature
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  • 4
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    Carbon–ocean gateway links (2017)
    Springer Nature
    Details
    Publication Date: 2017-03-01
    Print ISSN: 1752-0894
    Electronic ISSN: 1752-0908
    Topics: Geosciences
    Published by Springer Nature
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    PAPER CURRENT
  • 5
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    Clay-fraction strontium and neodymium isotopes, K/Al ratios, and bulk grain size from IODP Sites U1456 and U1457 (2020)
    PANGAEA
    Details
    Publication Date: 2023-01-30
    Description: This study presents data collected from International Ocean Discovery Program (IODP) Expedition 355 Arabian Sea Monsoon to investigate changes in sediment provenance as well as the effect of sediment transport processes on deep-sea sediment samples. From Site U1457, 83 sediment samples were analyzed, complemented by 44 samples from Site U1456. Samples were analyzed for bulk grain-size using a Malvern Mastersizer 2000. The clay fraction was separated, digested, and analyzed for K/Al ratios using inductively couple plasma optical emission spectroscopy (ICP-OES). Radiogenic strontium (87Sr/86Sr) was measured using a Neptune Plus multicollector inductively coupled plasma mass spectrometer (MC-ICP-MS) and a Triton Plus multicollector thermal ionization mass spectrometer (TIMS). A subset of 38 samples were analyzed for radiogenic neodymium composition (143Nd/144Nd) using TIMS.
    Keywords: Arabian Sea; clay; erosion; Expedition 355; neodymium (Nd); physical fractionation; Site U1456; Site U1457; Strontium (Sr)
    Type: Dataset
    Format: application/zip, 4 datasets
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  • 6
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    Clay-fraction strontium, neodymium isotopes and K/Al ratio from different Holes of IODP Sites 355-U1456 (2020)
    PANGAEA
    Details
    Publication Date: 2023-07-03
    Keywords: 355-U1456A; 355-U1456C; 355-U1456D; AGE; Arabian Sea; clay; Cumulative Offset; DEPTH, sediment/rock; DRILL; Drilling/drill rig; DSDP/ODP/IODP sample designation; erosion; Event label; Exp355; Expedition 355; ICP-OES; Instrument; Joides Resolution; Lithologic unit/sequence; neodymium (Nd); Neodymium-143/Neodymium-144 ratio; Neodymium-143/Neodymium-144 ratio, error; Neptune Plus multicollector inductively coupled plasma mass spectrometer (MC-ICP-MS) + Triton Plus multicollector thermal ionization mass spectrometer (TIMS); physical fractionation; Potassium/Aluminium ratio; Potassium/Aluminium ratio, error; Sample code/label; Sample comment; Site U1456; Site U1457; Strontium (Sr); Strontium-87/Strontium-86 ratio; Strontium-87/Strontium-86 ratio, error; Thermal Ionization Mass Spectrometry (TIMS); ε-Neodymium
    Type: Dataset
    Format: text/tab-separated-values, 404 data points
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  • 7
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    Grain size analysis from different Holes of IODP Sites 355-U1457 (2020)
    PANGAEA
    Details
    Publication Date: 2023-07-03
    Keywords: -; 355-U1457A; 355-U1457B; 355-U1457C; AGE; Arabian Sea; clay; Clay minerals; DEPTH, sediment/rock; Diameter; DRILL; Drilling/drill rig; DSDP/ODP/IODP sample designation; erosion; Event label; Exp355; Expedition 355; ICP-OES; Joides Resolution; Laser diffraction particle size analyser (Malvern Mastersizer 2000); Mode, grain size; neodymium (Nd); physical fractionation; Sample code/label; Sand; Silt; Site U1456; Site U1457; Size fraction 〈 0.020 µm; Size fraction 〉 2 mm, gravel; Size fraction 0.02-0.2 µm; Size fraction 0.20-0.24 µm; Size fraction 0.24-0.28 µm; Size fraction 0.28-0.32 µm; Size fraction 0.32-0.36 µm; Size fraction 0.36-0.42 µm; Size fraction 0.42-0.48 µm; Size fraction 0.48-0.55 µm; Size fraction 0.55-0.63 µm; Size fraction 0.63-0.72 µm; Size fraction 0.72-0.83 µm; Size fraction 0.83-0.96 µm; Size fraction 0.96-1.1 µm; Size fraction 1.10-1.26 µm; Size fraction 1.26-1.45 µm; Size fraction 1.45-1.66 µm; Size fraction 1.66-1.91 µm; Size fraction 1.91-2.19 µm; Size fraction 10.00-11.48 µm; Size fraction 104.71-120.23 µm; Size fraction 1096.48-1258.93 µm; Size fraction 11.48-13.18 µm; Size fraction 120.23-138.04 µm; Size fraction 1258.93-1445.44 µm; Size fraction 13.18-15.14 µm; Size fraction 138.04-158.49 µm; Size fraction 1445.44-1659.59 µm; Size fraction 15.14-17.38 µm; Size fraction 158.49-181.97 µm; Size fraction 1659.59-1905.46 µm; Size fraction 17.38-19.95 µm; Size fraction 181.97-208.93 µm; Size fraction 19.95-22.91 µm; Size fraction 1905.46-2000 µm; Size fraction 2.19-2.51 µm; Size fraction 2.51-2.88 µm; Size fraction 2.88-3.31 µm; Size fraction 208.93-239.88 µm; Size fraction 22.91-26.3 µm; Size fraction 239.88-275.42 µm; Size fraction 26.30-30.2 µm; Size fraction 275.42-316.23 µm; Size fraction 3.31-3.8 µm; Size fraction 3.80-4.37 µm; Size fraction 30.20-34.67 µm; Size fraction 316.23-363.08 µm; Size fraction 34.67-39.81 µm; Size fraction 363.08-416.87 µm; Size fraction 39.81-45.71 µm; Size fraction 4.37-5.01 µm; Size fraction 416.87-478.63 µm; Size fraction 45.71-52.48 µm; Size fraction 478.63-549.54 µm; Size fraction 5.01-5.75 µm; Size fraction 5.75-6.61 µm; Size fraction 52.48-60.26 µm; Size fraction 549.54-630.96 µm; Size fraction 6.61-7.59 µm; Size fraction 60.26-69.18 µm; Size fraction 630.96-724.44 µm; Size fraction 69.18-79.43 µm; Size fraction 7.59-8.71 µm; Size fraction 724.44-831.76 µm; Size fraction 79.43-91.2 µm; Size fraction 8.71-10 µm; Size fraction 831.76-954.99 µm; Size fraction 91.20-104.71 µm; Size fraction 954.99-1096.48 µm; Standard deviation; Strontium (Sr)
    Type: Dataset
    Format: text/tab-separated-values, 6308 data points
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  • 8
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    Grain size analysis from different Holes of IODP Sites 355-U1456 (2020)
    PANGAEA
    Details
    Publication Date: 2023-07-03
    Keywords: -; 355-U1456A; 355-U1456C; 355-U1456D; AGE; Arabian Sea; clay; Clay minerals; DEPTH, sediment/rock; Diameter; DRILL; Drilling/drill rig; DSDP/ODP/IODP sample designation; erosion; Event label; Exp355; Expedition 355; ICP-OES; Joides Resolution; Laser diffraction particle size analyser (Malvern Mastersizer 2000); Mode, grain size; neodymium (Nd); physical fractionation; Sample code/label; Sand; Silt; Site U1456; Site U1457; Size fraction 〈 0.020 µm; Size fraction 〉 2 mm, gravel; Size fraction 0.02-0.2 µm; Size fraction 0.20-0.24 µm; Size fraction 0.24-0.28 µm; Size fraction 0.28-0.32 µm; Size fraction 0.32-0.36 µm; Size fraction 0.36-0.42 µm; Size fraction 0.42-0.48 µm; Size fraction 0.48-0.55 µm; Size fraction 0.55-0.63 µm; Size fraction 0.63-0.72 µm; Size fraction 0.72-0.83 µm; Size fraction 0.83-0.96 µm; Size fraction 0.96-1.1 µm; Size fraction 1.10-1.26 µm; Size fraction 1.26-1.45 µm; Size fraction 1.45-1.66 µm; Size fraction 1.66-1.91 µm; Size fraction 1.91-2.19 µm; Size fraction 10.00-11.48 µm; Size fraction 104.71-120.23 µm; Size fraction 1096.48-1258.93 µm; Size fraction 11.48-13.18 µm; Size fraction 120.23-138.04 µm; Size fraction 1258.93-1445.44 µm; Size fraction 13.18-15.14 µm; Size fraction 138.04-158.49 µm; Size fraction 1445.44-1659.59 µm; Size fraction 15.14-17.38 µm; Size fraction 158.49-181.97 µm; Size fraction 1659.59-1905.46 µm; Size fraction 17.38-19.95 µm; Size fraction 181.97-208.93 µm; Size fraction 19.95-22.91 µm; Size fraction 1905.46-2000 µm; Size fraction 2.19-2.51 µm; Size fraction 2.51-2.88 µm; Size fraction 2.88-3.31 µm; Size fraction 208.93-239.88 µm; Size fraction 22.91-26.3 µm; Size fraction 239.88-275.42 µm; Size fraction 26.30-30.2 µm; Size fraction 275.42-316.23 µm; Size fraction 3.31-3.8 µm; Size fraction 3.80-4.37 µm; Size fraction 30.20-34.67 µm; Size fraction 316.23-363.08 µm; Size fraction 34.67-39.81 µm; Size fraction 363.08-416.87 µm; Size fraction 39.81-45.71 µm; Size fraction 4.37-5.01 µm; Size fraction 416.87-478.63 µm; Size fraction 45.71-52.48 µm; Size fraction 478.63-549.54 µm; Size fraction 5.01-5.75 µm; Size fraction 5.75-6.61 µm; Size fraction 52.48-60.26 µm; Size fraction 549.54-630.96 µm; Size fraction 6.61-7.59 µm; Size fraction 60.26-69.18 µm; Size fraction 630.96-724.44 µm; Size fraction 69.18-79.43 µm; Size fraction 7.59-8.71 µm; Size fraction 724.44-831.76 µm; Size fraction 79.43-91.2 µm; Size fraction 8.71-10 µm; Size fraction 831.76-954.99 µm; Size fraction 91.20-104.71 µm; Size fraction 954.99-1096.48 µm; Standard deviation; Strontium (Sr)
    Type: Dataset
    Format: text/tab-separated-values, 3484 data points
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  • 9
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    87Sr/86Sr in pore fluids from different Holes of IODP Site 355-U1456 and U1457 in the Arabian Sea Monsoon (2020)
    PANGAEA
    Details
    Publication Date: 2023-07-03
    Description: The radiogenic strontium isotopic composition of pore fluids from two sites drilled during IODP Expedition 355 Arabian Sea Monsoon. We report data from Site U1456 (n=21) and U1457 (n=20). Three distinct zones are identified, similar at both sites.
    Keywords: 355-U1456A; 355-U1456C; 355-U1456D; 355-U1457A; 355-U1457B; 355-U1457C; 87Sr/86Sr; Arabian Sea; Calcium; DEPTH, sediment/rock; DRILL; Drilling/drill rig; Event label; Exp355; Expedition 355; Joides Resolution; pore fluid; Sample code/label; Site U1456; Site U1457; Strontium; Strontium-87/Strontium-86 ratio; Strontium-87/Strontium-86 ratio, error
    Type: Dataset
    Format: text/tab-separated-values, 205 data points
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  • 10
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    Clay-fraction strontium, neodymium isotopes and K/Al ratio from different Holes of IODP Sites 355-U1457 (2020)
    PANGAEA
    Details
    Publication Date: 2023-07-03
    Keywords: 355-U1457A; 355-U1457B; 355-U1457C; AGE; Arabian Sea; clay; Cumulative Offset; DEPTH, sediment/rock; DRILL; Drilling/drill rig; DSDP/ODP/IODP sample designation; erosion; Event label; Exp355; Expedition 355; ICP-OES; Instrument; Joides Resolution; Lithologic unit/sequence; neodymium (Nd); Neodymium-143/Neodymium-144 ratio; Neodymium-143/Neodymium-144 ratio, error; Neptune Plus multicollector inductively coupled plasma mass spectrometer (MC-ICP-MS) + Triton Plus multicollector thermal ionization mass spectrometer (TIMS); physical fractionation; Potassium/Aluminium ratio; Potassium/Aluminium ratio, error; Sample code/label; Sample comment; Site U1456; Site U1457; Strontium (Sr); Strontium-87/Strontium-86 ratio; Strontium-87/Strontium-86 ratio, error; Thermal Ionization Mass Spectrometry (TIMS); ε-Neodymium
    Type: Dataset
    Format: text/tab-separated-values, 858 data points
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    DATA PANGAEA
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