Notsu, Kenjii; Onuma, Naoki; Fujii, Naoyuki (1986): Rb-Sr isotope systematics and Sr/Ca-Ba/Ca ratios at DSDP Hole 89-462A [dataset publication series]. PANGAEA, https://doi.org/10.1594/PANGAEA.794478, Supplement to: Notsu, K et al. (1986): Rb-Sr isotope systematics and Sr/Ca-Ba/Ca ratios of Nauru Basin Basalts, Deep Sea Drilling Project Leg 89. In: Moberly, R; Schlanger, SO; et al. (eds.), Initial Reports of the Deep Sea Drilling Project, Washington (U.S. Govt. Printing Office), 89, 523-527, https://doi.org/10.2973/dsdp.proc.89.120.1986
Always quote citation above when using data! You can download the citation in several formats below.
Abstract:
Four samples of Nauru Basin basalts (Cores 94 to 109 of Hole 462A, sub-bottom depth 1077-1209 m) have 87Sr/86Sr ratios in the range 0.7037 to 0.7038, which is distinctly higher than the ratios of N-type MORB. The Rb contents of the samples are depleted in comparison with those of MORB and ocean-island basalts. These chemical and isotopic characteristics are identical to those of the basalts previously drilled during Leg 61 (Cores 75 to 90 of Hole 462A), and are explained in terms of inhomogeneity of the source region in the mantle or later alteration effects.
Sr/Ca-Ba/Ca systematics of 15 samples from Cores 462A-94 to 462A-109 and 14 samples from Cores 462A-75 to 462A-90 suggest that the Nauru Basin basalts are derived from a mantle peridotite by 20 to 30% partial melting with subsequent Plagioclase crystallization.
Project(s):
Deep Sea Drilling Project (DSDP)
Coverage:
Latitude: 7.241700 * Longitude: 165.031700
Date/Time Start: 1982-11-05T00:00:00 * Date/Time End: 1982-11-05T00:00:00
Event(s):
89-462A * Latitude: 7.241700 * Longitude: 165.031700 * Date/Time: 1982-11-05T00:00:00 * Elevation: -5177.0 m * Penetration: 1209 m * Recovery: 74.4 m * Location: North Pacific * Campaign: Leg89 * Basis: Glomar Challenger * Method/Device: Drilling/drill rig (DRILL) * Comment: 17 cores; 137.3 m cored; 0 m drilled; 54.2 % recovery
License:
Creative Commons Attribution 3.0 Unported (CC-BY-3.0)
Size:
2 datasets
Download Data
Datasets listed in this publication series
- Notsu, K; Onuma, N; Fujii, N (1986): (Table 2) Ca, Sr, and Ba contents at DSDP Hole 89-462A basalts. https://doi.org/10.1594/PANGAEA.794477
- Notsu, K; Onuma, N; Fujii, N (1986): (Table 1) Rb and Sr contents and 87Sr/86Sr ratios at DSDP Hole 89-462A basalts. https://doi.org/10.1594/PANGAEA.794476