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  • 1
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    (Table 1) 10 Beryllium and CaCO3 at DSDP Holes 86-576B, 86-576, and 86-578
    PANGAEA
    In:  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, https://doi.org/10.2973/dsdp.proc.86.122.1985
    Details
    Publication Date: 2023-06-27
    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.
    Keywords: 86-576; 86-576B; 86-578; Atomic absorption spectrometry (AAS); Beryllium-10; Beryllium-10, standard deviation; Beryllium-10/Beryllium-9, standard deviation; Beryllium-10/Beryllium-9 ratio; Calcium carbonate; Deep Sea Drilling Project; DEPTH, sediment/rock; DRILL; Drilling/drill rig; DSDP; DSDP/ODP/IODP sample designation; Event label; Glomar Challenger; Leg86; North Pacific; Sample code/label; see reference(s)
    Type: Dataset
    Format: text/tab-separated-values, 201 data points
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    DATA PANGAEA
  • 2
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    U-Th isotopes and Fe-Mn composition of layers from the bottom side of Mn nodule SO11_262DK (262GBHF) (2022)
    PANGAEA
    Details
    Publication Date: 2023-08-28
    Description: Attempts have been made to study the entire growth history of a manganese nodule from the northern part of Peru Basin in the Pacific using radiochemical profiles of 230Th232Th, 227Th230Th, and 10Be9Be. Combined with the observations on Fe-Mn contents and textural variation, the radiochemical data indicate that the nodule grew more or less concentrically throughout most of its existence since it formed 1.5 my ago, receiving Mn from both bottom water and pore water. This condition appeared to have changed about 180 ky ago when the growth became asymmetric in that the top and bottom sides became fixed in their relative positions on the sea floor. Since then, the bottom side accreted with a fast rate of close to 200 mm/my, apparently fueled by the supply of diagenetically remobilized Mn in pore water from the sediment substrate. In the meantime, the top side accumulated at about 6 mm/my, a value which is in the normal range for deep-sea nodules having their Mn supplied from the hydrogenous source.
    Keywords: 262GBHF; Alpha spectrometry; Deposit type; DEPTH, sediment/rock; Distance; Distance, maximum; Distance, minimum; Dredge, box; DRG_B; Elevation of event; growth; Identification; Iron; Latitude of event; Longitude of event; Manganese; manganese nodules; NOAA and MMS Marine Minerals Geochemical Database; NOAA-MMS; ocean; Peru Basin, Pacific Ocean; SO11; SO11_262DK; Sonne; SOPAC II; Thorium-227; Thorium-227, standard deviation; Thorium-227 excess/Thorium-230 excess activity ratio; Thorium-227 excess/Thorium-230 excess activity ratio, standard deviation; Thorium-230; Thorium-230, standard deviation; Thorium-230 excess/Thorium-232 activity ratio; Thorium-230 excess/Thorium-232 activity ratio, standard deviation; Thorium-232; Thorium-232, standard deviation; Uranium-234; Uranium-234, standard deviation; Uranium-234/Uranium-238 activity ratio; Uranium-234/Uranium-238 activity ratio, standard deviation
    Type: Dataset
    Format: text/tab-separated-values, 243 data points
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    DATA PANGAEA
  • 3
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    Unknown
    Beryllium isotopes composition of layers from the bottom side of Mn nodule SO11_262DK (262GBHF) (2022)
    PANGAEA
    Details
    Publication Date: 2023-08-28
    Description: Attempts have been made to study the entire growth history of a manganese nodule from the northern part of Peru Basin in the Pacific using radiochemical profiles of 230Th232Th, 227Th230Th, and 10Be9Be. Combined with the observations on Fe-Mn contents and textural variation, the radiochemical data indicate that the nodule grew more or less concentrically throughout most of its existence since it formed 1.5 my ago, receiving Mn from both bottom water and pore water. This condition appeared to have changed about 180 ky ago when the growth became asymmetric in that the top and bottom sides became fixed in their relative positions on the sea floor. Since then, the bottom side accreted with a fast rate of close to 200 mm/my, apparently fueled by the supply of diagenetically remobilized Mn in pore water from the sediment substrate. In the meantime, the top side accumulated at about 6 mm/my, a value which is in the normal range for deep-sea nodules having their Mn supplied from the hydrogenous source.
    Keywords: 262GBHF; Atomic absorption spectrometry (AAS); Beryllium-10; Beryllium-10, standard deviation; Beryllium-10/Beryllium-9; Beryllium-10/Beryllium-9, standard deviation; Beryllium-9; Beryllium-9, standard deviation; Deposit type; DEPTH, sediment/rock; Distance; Distance, maximum; Distance, minimum; Dredge, box; DRG_B; Elevation of event; growth; Identification; Iron; Latitude of event; Longitude of event; Manganese; manganese nodules; NOAA and MMS Marine Minerals Geochemical Database; NOAA-MMS; ocean; Peru Basin, Pacific Ocean; SO11; SO11_262DK; Sonne; SOPAC II
    Type: Dataset
    Format: text/tab-separated-values, 89 data points
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    DATA PANGAEA
  • 4
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    Growth of a manganese nodule from Peru Basin: A radiochemical anatomy (2022)
    PANGAEA
    Details
    Publication Date: 2023-08-28
    Description: Attempts have been made to study the entire growth history of a manganese nodule from the northern part of Peru Basin in the Pacific using radiochemical profiles of 230Th232Th, 227Th230Th, and 10Be9Be. Combined with the observations on Fe-Mn contents and textural variation, the radiochemical data indicate that the nodule grew more or less concentrically throughout most of its existence since it formed 1.5 my ago, receiving Mn from both bottom water and pore water. This condition appeared to have changed about 180 ky ago when the growth became asymmetric in that the top and bottom sides became fixed in their relative positions on the sea floor. Since then, the bottom side accreted with a fast rate of close to 200 mm/my, apparently fueled by the supply of diagenetically remobilized Mn in pore water from the sediment substrate. In the meantime, the top side accumulated at about 6 mm/my, a value which is in the normal range for deep-sea nodules having their Mn supplied from the hydrogenous source.
    Keywords: 262GBHF; Dredge, box; DRG_B; growth; manganese nodules; NOAA and MMS Marine Minerals Geochemical Database; NOAA-MMS; ocean; Peru Basin, Pacific Ocean; SO11; SO11_262DK; Sonne; SOPAC II
    Type: Dataset
    Format: application/zip, 4 datasets
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    DATA PANGAEA
  • 5
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    Unknown
    Beryllium isotopes composition of layers from the top side of Mn nodule SO11_262DK (262GBHF) (2022)
    PANGAEA
    Details
    Publication Date: 2023-08-28
    Description: Attempts have been made to study the entire growth history of a manganese nodule from the northern part of Peru Basin in the Pacific using radiochemical profiles of 230Th232Th, 227Th230Th, and 10Be9Be. Combined with the observations on Fe-Mn contents and textural variation, the radiochemical data indicate that the nodule grew more or less concentrically throughout most of its existence since it formed 1.5 my ago, receiving Mn from both bottom water and pore water. This condition appeared to have changed about 180 ky ago when the growth became asymmetric in that the top and bottom sides became fixed in their relative positions on the sea floor. Since then, the bottom side accreted with a fast rate of close to 200 mm/my, apparently fueled by the supply of diagenetically remobilized Mn in pore water from the sediment substrate. In the meantime, the top side accumulated at about 6 mm/my, a value which is in the normal range for deep-sea nodules having their Mn supplied from the hydrogenous source.
    Keywords: 262GBHF; Atomic absorption spectrometry (AAS); Beryllium-10; Beryllium-10, standard deviation; Beryllium-10/Beryllium-9; Beryllium-10/Beryllium-9, standard deviation; Beryllium-9; Beryllium-9, standard deviation; Deposit type; DEPTH, sediment/rock; Distance; Distance, maximum; Distance, minimum; Dredge, box; DRG_B; Elevation of event; growth; Identification; Iron; Latitude of event; Longitude of event; Manganese; manganese nodules; NOAA and MMS Marine Minerals Geochemical Database; NOAA-MMS; ocean; Peru Basin, Pacific Ocean; SO11; SO11_262DK; Sonne; SOPAC II
    Type: Dataset
    Format: text/tab-separated-values, 117 data points
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    DATA PANGAEA
  • 6
    facet.materialart.
    Unknown
    U-Th isotopes and Fe-Mn composition of layers from the top side of Mn nodule SO11_262DK (262GBHF) (2022)
    PANGAEA
    Details
    Publication Date: 2023-08-28
    Description: Attempts have been made to study the entire growth history of a manganese nodule from the northern part of Peru Basin in the Pacific using radiochemical profiles of 230Th232Th, 227Th230Th, and 10Be9Be. Combined with the observations on Fe-Mn contents and textural variation, the radiochemical data indicate that the nodule grew more or less concentrically throughout most of its existence since it formed 1.5 my ago, receiving Mn from both bottom water and pore water. This condition appeared to have changed about 180 ky ago when the growth became asymmetric in that the top and bottom sides became fixed in their relative positions on the sea floor. Since then, the bottom side accreted with a fast rate of close to 200 mm/my, apparently fueled by the supply of diagenetically remobilized Mn in pore water from the sediment substrate. In the meantime, the top side accumulated at about 6 mm/my, a value which is in the normal range for deep-sea nodules having their Mn supplied from the hydrogenous source.
    Keywords: 262GBHF; Alpha spectrometry; Deposit type; DEPTH, sediment/rock; Distance; Distance, maximum; Distance, minimum; Dredge, box; DRG_B; Elevation of event; growth; Identification; Iron; Latitude of event; Longitude of event; Manganese; manganese nodules; NOAA and MMS Marine Minerals Geochemical Database; NOAA-MMS; ocean; Peru Basin, Pacific Ocean; SO11; SO11_262DK; Sonne; SOPAC II; Thorium-227; Thorium-227, standard deviation; Thorium-227 excess/Thorium-230 excess activity ratio; Thorium-227 excess/Thorium-230 excess activity ratio, standard deviation; Thorium-230; Thorium-230, standard deviation; Thorium-230 excess/Thorium-232 activity ratio; Thorium-230 excess/Thorium-232 activity ratio, standard deviation; Thorium-232; Thorium-232, standard deviation; Uranium-234; Uranium-234, standard deviation; Uranium-234/Uranium-238 activity ratio; Uranium-234/Uranium-238 activity ratio, standard deviation
    Type: Dataset
    Format: text/tab-separated-values, 226 data points
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  • 7
    Electronic Resource
    Electronic Resource
    Carbon-13 CIDNP from reactions of some simple organic and inorganic radicals during pulse radiolysis (1979)
    s.l. : American Chemical Society
    The @journal of physical chemistry 〈Washington, DC〉 83 (1979), S. 3444-3448 
    Details
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology , Physics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/j100489a026
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    Paper (German National Licenses)
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  • 8
    Electronic Resource
    Electronic Resource
    CIDNP/FTNMR as a mechanistic probe in the pulse radiolysis of aqueous acetone and acetaldehyde (1979)
    s.l. : American Chemical Society
    The @journal of physical chemistry 〈Washington, DC〉 83 (1979), S. 2186-2195 
    Details
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology , Physics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/j100480a002
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  • 9
    Electronic Resource
    Electronic Resource
    Symmetry breaking in HCl and DCl dimers: A direct near-infrared measurement of interconversion tunneling rates (1989)
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 91 (1989), S. 4418-4419 
    Details
    ISSN: 1089-7690
    Source: AIP Digital Archive
    Topics: Physics , Chemistry and Pharmacology
    Notes: The interconversion tunneling frequencies for (HCl)2 and (DCl)2 are obtained from near-infrared absorption spectra of the H(D)Cl stretching transitions, to spectroscopic precision for the mixed 35Cl–37Cl dimers. A phenomenological model of the interconversion process explains several experimental observations, and provides good estimates of the splittings expected for the 35Cl–35Cl and 37Cl–37Cl species.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.456774
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  • 10
    Electronic Resource
    Electronic Resource
    Fragmentation of NH3 dimers by electron impact ionization (1988)
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 88 (1988), S. 3028-3031 
    Details
    ISSN: 1089-7690
    Source: AIP Digital Archive
    Topics: Physics , Chemistry and Pharmacology
    Notes: The fragmentation of ammonia dimers by electron impact ionization is investigated by preselecting the neutral species using scattering and spectroscopic methods. In the first experiment, the measured angular and velocity dependence of the ammonia cluster scattered from a helium beam is used to separate the dimer from the other contributions. In the second experiment, the rotationally resolved spectrum obtained by microwave electric resonance technique is used to label the dimer. The ratio of the ion intensities m=18 (NH+4) to m=17 (NH+3) amu is 1.3 and 1.8, respectively. In the case of scattering, the result is independent of the initial state distribution of the dimer. The remaining difference is attributed to the different ion sources. This remarkable result is explained in terms of simple models based on the structural change from the neutral to the ionized configuration and the fragmentation pattern of the monomer.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.453945
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