Egeberg, Per Kristian; Brunfelt, Arild O; Stabel, Arne S (1992): (Table 1) Composition of selected ash layers in ODP Site 126-792 [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.774205, Supplement to: Egeberg, PK et al. (1992): Characterization and correlation of megascopic tephras in Site 792 cores from the Izu-Ogasawara Forearc Basin (Japan) by trace elements and 87Sr/86Sr and 143Nd/144Nd isotopes. In: Taylor, B; Fujioka, K; et al. (eds.), Proceedings of the Ocean Drilling Program, Scientific Results, College Station, TX (Ocean Drilling Program), 126, 457-465, https://doi.org/10.2973/odp.proc.sr.126.149.1992
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Published: 1992 (exact date unknown) • DOI registered: 2012-02-15
Abstract:
Glass shards from 26 megascopic tephras (1-29 cm thick) were separated and analyzed for 26 elements and 87Sr/86Sr and 143Nd/144Nd isotope ratios. The isotope data allowed us to assess the degree of alteration of the samples. The separates contain less than 10% of palagonitized glass or secondary alteration minerals. Correlation diagrams and multivariate analyses have been used to characterize the glass shards in a tectonic setting and group the tephras according to their magmatic affinity. Four tholeiitic groups, two calc-alkaline groups, and one group with glass of shoshonitic affinity can be distinguished. The tholeiitic groups form a time series; however, judging from the rare-earth-element patterns and the temporal variations of the Ce/Yb ratios, the evolution is not unidirectional from strong to weak tholeiitic affinity.
The tephras have been correlated with volcanism along the Izu-Ogasawara and Ryukyu arcs by means of trace element distribution, 87Sr/86Sr ratios, and their magmatic affinity. The tholeiitic layers were derived from volcanoes on the Izu-Ogasawara Arc, most probably from the volcanic island Hachijojima. Only one group of the calc-alkaline layers can have derived from the Izu-Ogasawara Arc. The other calc-alkaline layers and the two layers with shoshonitic affinity probably derive from volcanism along the Ryukyu Arc.
Project(s):
Ocean Drilling Program (ODP)
Coverage:
Median Latitude: 32.399600 * Median Longitude: 140.380000 * South-bound Latitude: 32.399400 * West-bound Longitude: 140.379300 * North-bound Latitude: 32.399800 * East-bound Longitude: 140.380700
Date/Time Start: 1989-05-17T01:36:00 * Date/Time End: 1989-05-26T06:40:00
Minimum DEPTH, sediment/rock: 6.34 m * Maximum DEPTH, sediment/rock: 309.45 m
Event(s):
126-792A * Latitude: 32.399800 * Longitude: 140.380700 * Date/Time Start: 1989-05-17T01:36:00 * Date/Time End: 1989-05-17T17:25:00 * Elevation: -1798.0 m * Penetration: 95 m * Recovery: 72.09 m * Location: North Pacific Ocean * Campaign: Leg126 * Basis: Joides Resolution * Method/Device: Drilling/drill rig (DRILL) * Comment: 10 cores; 95 m cored; 0 m drilled; 75.9 % recovery
126-792E * Latitude: 32.399400 * Longitude: 140.379300 * Date/Time Start: 1989-05-19T04:55:00 * Date/Time End: 1989-05-26T06:40:00 * Elevation: -1798.0 m * Penetration: 885.9 m * Recovery: 362.07 m * Location: North Pacific Ocean * Campaign: Leg126 * Basis: Joides Resolution * Method/Device: Drilling/drill rig (DRILL) * Comment: 78 cores; 750.3 m cored; 0 m drilled; 48.3 % recovery
Parameter(s):
| # | Name | Short Name | Unit | Principal Investigator | Method/Device | Comment |
|---|---|---|---|---|---|---|
| 1 | Event label | Event | ||||
| 2 | Sample code/label | Sample label | Egeberg, Per Kristian | DSDP/ODP/IODP sample designation | ||
| 3 | Layer description | Layer | Egeberg, Per Kristian | Shipboard Scientific Party, ash layer number | ||
| 4 | Layer description | Layer | Egeberg, Per Kristian | Shipboard Scientific Party, ash layer number | ||
| 5 | DEPTH, sediment/rock | Depth sed | m | Geocode – mbsf | ||
| 6 | AGE | Age | ka BP | Geocode | ||
| 7 | Layer thickness | Thickness | m | Egeberg, Per Kristian | ||
| 8 | Sodium oxide | Na2O | % | Egeberg, Per Kristian | Instrumental neutron activation analysis (INAA) (Reimann et al., 1998) | Rel. Std. = 5.4 % |
| 9 | Selenium | Se | mg/kg | Egeberg, Per Kristian | Instrumental neutron activation analysis (INAA) (Reimann et al., 1998) | Rel. Std. = 2.3 % |
| 10 | Titanium dioxide | TiO2 | % | Egeberg, Per Kristian | Instrumental neutron activation analysis (INAA) (Reimann et al., 1998) | Rel. Std. = 9.9 % |
| 11 | Iron oxide, Fe2O3 | Fe2O3 | % | Egeberg, Per Kristian | Instrumental neutron activation analysis (INAA) (Reimann et al., 1998) | Rel. Std. = 2.1 % |
| 12 | Cobalt | Co | mg/kg | Egeberg, Per Kristian | Instrumental neutron activation analysis (INAA) (Reimann et al., 1998) | Rel. Std. = 1.9 % |
| 13 | Rubidium | Rb | mg/kg | Egeberg, Per Kristian | Isotope dilution | Rel. Std. = 0.03 % |
| 14 | Strontium | Sr | mg/kg | Egeberg, Per Kristian | Isotope dilution | Rel. Std. = 0.03 % |
| 15 | Zirconium | Zr | mg/kg | Egeberg, Per Kristian | Instrumental neutron activation analysis (INAA) (Reimann et al., 1998) | Rel. Std. = 9.02 % |
| 16 | Antimony | Sb | mg/kg | Egeberg, Per Kristian | Instrumental neutron activation analysis (INAA) (Reimann et al., 1998) | Rel. Std. = 25.76 % |
| 17 | Caesium | Cs | mg/kg | Egeberg, Per Kristian | Instrumental neutron activation analysis (INAA) (Reimann et al., 1998) | Rel. Std. = 7.01 % |
| 18 | Barium | Ba | mg/kg | Egeberg, Per Kristian | Instrumental neutron activation analysis (INAA) (Reimann et al., 1998) | Rel. Std. = 4.75 % |
| 19 | Lanthanum | La | mg/kg | Egeberg, Per Kristian | Instrumental neutron activation analysis (INAA) (Reimann et al., 1998) | Rel. Std. = 6.64 % |
| 20 | Cerium | Ce | mg/kg | Egeberg, Per Kristian | Instrumental neutron activation analysis (INAA) (Reimann et al., 1998) | Rel. Std. = 12.4 % |
| 21 | Neodymium | Nd | mg/kg | Egeberg, Per Kristian | Isotope dilution | Rel. Std. = 0.05 % |
| 22 | Samarium | Sm | mg/kg | Egeberg, Per Kristian | Isotope dilution | Rel. Std. = 0.05 % |
| 23 | Europium | Eu | mg/kg | Egeberg, Per Kristian | Instrumental neutron activation analysis (INAA) (Reimann et al., 1998) | Rel. Std. = 2.04 % |
| 24 | Terbium | Tb | mg/kg | Egeberg, Per Kristian | Instrumental neutron activation analysis (INAA) (Reimann et al., 1998) | Rel. Std. = 0.8 % |
| 25 | Holmium | Ho | mg/kg | Egeberg, Per Kristian | Instrumental neutron activation analysis (INAA) (Reimann et al., 1998) | Rel. Std. = 5 % |
| 26 | Thulium | Tm | mg/kg | Egeberg, Per Kristian | Instrumental neutron activation analysis (INAA) (Reimann et al., 1998) | Rel. Std. = 1.78 % |
| 27 | Ytterbium | Yb | mg/kg | Egeberg, Per Kristian | Instrumental neutron activation analysis (INAA) (Reimann et al., 1998) | Rel. Std. = 1.86 % |
| 28 | Lutetium | Lu | mg/kg | Egeberg, Per Kristian | Instrumental neutron activation analysis (INAA) (Reimann et al., 1998) | Rel. Std. = 9.83 % |
| 29 | Hafnium | Hf | mg/kg | Egeberg, Per Kristian | Instrumental neutron activation analysis (INAA) (Reimann et al., 1998) | Rel. Std. = 2.42 % |
| 30 | Tantalum | Ta | mg/kg | Egeberg, Per Kristian | Instrumental neutron activation analysis (INAA) (Reimann et al., 1998) | Rel. Std. = 1.58 % |
| 31 | Tungsten | W | mg/kg | Egeberg, Per Kristian | Instrumental neutron activation analysis (INAA) (Reimann et al., 1998) | Rel. Std. = 10.6 % |
| 32 | Thorium | Th | mg/kg | Egeberg, Per Kristian | Instrumental neutron activation analysis (INAA) (Reimann et al., 1998) | Rel. Std. = 3.38 % |
| 33 | Uranium | U | mg/kg | Egeberg, Per Kristian | Instrumental neutron activation analysis (INAA) (Reimann et al., 1998) | Rel. Std. = 12.9 % |
| 34 | Strontium-87/Strontium-86 ratio | 87Sr/86Sr | Egeberg, Per Kristian | Instrumental neutron activation analysis (INAA) (Reimann et al., 1998) | Rel. Std. = 0.0019 % | |
| 35 | Neodymium-143/Neodymium-144 ratio | 143Nd/144Nd | Egeberg, Per Kristian | Instrumental neutron activation analysis (INAA) (Reimann et al., 1998) | Rel. Std. = 0.00075 % |
License:
Creative Commons Attribution 3.0 Unported (CC-BY-3.0)
Size:
827 data points