Briqueu, Louis; Lancelot, Joel R (1983): (Table 1) K, Rb and Sr concentrations and Sr isotopic composition of sediments and igneous rocks from DSDP Hole 30-286 [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.707124, Supplement to: Briqueu, L; Lancelot, JR (1983): Sr isotopes and K, Rb, Sr balance in sediments and igneous rocks from the subducted plate of the Vanuatu (New Hebrides) active margin. Geochimica et Cosmochimica Acta, 47(2), 191-200, https://doi.org/10.1016/0016-7037(83)90132-1
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Abstract:
To evaluate the possible contribution of ocean floor sediments during the genesis of the volcanism of Vanuatu (New Hebrides) active margin, we have determined the balance of Sr isotopes and K, Rb and Sr contents for the stratigraphic column of site 286 (leg 30, DSDP). This site is located on the oceanic plate that will be subducted. Analyses have been performed on sedimentary and igneous rocks, before and after acid leaching. The Sr isotopic data do not support the occurrence of some continental component in arc magmas of this active margin which is really intraoceanic. It is demonstrated that the d'Entrecasteaux fracture zone results from the intense fracturing of typical oceanic crust. The analyses of the volcanogenic components of the sediments show a change in the source of volcanoclastic detritus from the Loyalty islands in the Eocene to the volcanic arc of Vanuatu (New Hebrides) during Pliocene and Quaternary times. The determined balance of Sr isotopes and of K, Rb, Sr contents, may be used for calculation of multicomponent melting mixing models for the origin of Vanuatu arc magmas, but we emphasize that in these models the Sr isotopes cannot be considered as an appropriated tracer of sediment contribution.
Project(s):
Deep Sea Drilling Project (DSDP)
Coverage:
Latitude: -16.532000 * Longitude: 166.369700
Date/Time Start: 1973-05-07T00:00:00 * Date/Time End: 1973-05-07T00:00:00
Minimum DEPTH, sediment/rock: 23.1 m * Maximum DEPTH, sediment/rock: 704.0 m
Event(s):
30-286 * Latitude: -16.532000 * Longitude: 166.369700 * Date/Time: 1973-05-07T00:00:00 * Elevation: -4465.0 m * Penetration: 706 m * Recovery: 169.5 m * Location: South Pacific Ocean * Campaign: Leg30 * Basis: Glomar Challenger * Method/Device: Drilling/drill rig (DRILL) * Comment: 41 cores; 383 m cored; 0 m drilled; 44.3 % recovery
Parameter(s):
| # | Name | Short Name | Unit | Principal Investigator | Method/Device | Comment |
|---|---|---|---|---|---|---|
| 1 | DEPTH, sediment/rock | Depth sed | m | Geocode | ||
| 2 | Sample code/label | Sample label | Briqueu, Louis | DSDP/ODP/IODP sample designation | ||
| 3 | Lithologic unit/sequence | Unit | Briqueu, Louis | |||
| 4 | Sample type | Samp type | Briqueu, Louis | |||
| 5 | Potassium | K | % | Briqueu, Louis | Isotope dilution | |
| 6 | Rubidium | Rb | mg/kg | Briqueu, Louis | Isotope dilution | |
| 7 | Strontium | Sr | mg/kg | Briqueu, Louis | Isotope dilution | |
| 8 | Strontium-87/Strontium-86 ratio | 87Sr/86Sr | Briqueu, Louis | Isotope ratio mass spectrometry | ||
| 9 | Strontium-87/Strontium-86 ratio | 87Sr/86Sr | Briqueu, Louis | Isotope ratio mass spectrometry | (87Sr/86Sr)_o |
License:
Creative Commons Attribution 3.0 Unported (CC-BY-3.0)
Size:
250 data points