Hickey-Vargas, Rosemary (1998): Chemical and isotopic composition of basalts and basaltic glasses from Philippine Sea DSDP sites [dataset publication series]. PANGAEA, https://doi.org/10.1594/PANGAEA.701225, Supplement to: Hickey-Vargas, R (1998): Origin of the Indian Ocean-type isotopic signature in basalts from Philippine Sea plate spreading centers: An assessment of local versus large-scale processes. Journal of Geophysical Research: Solid Earth, 103(B9), 20963-20979, https://doi.org/10.1029/98JB02052
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Abstract:
Basalts erupted from spreading centers on the Philippine Sea plate between 50 Ma and the present have the distinctive isotopic characteristics of Indian Ocean mid-ocean ridge basalt (MORB), such as high 208Pb/204Pb and low 143Nd/144Nd for a given 206Pb/204Pb compared with Pacific and Atlantic Ocean MORB. This feature may indicate that the upper mantle of the Philippine Sea plate originated as part of the existing Indian Ocean upper mantle domain, or, alternatively, that local processes duplicated these isotopic characteristics within the sub-Philippine Sea plate upper mantle. Synthesis of new and published isotopic data for Philippine Sea plate basin basalts and island arc volcanic rocks, radiometric ages, and tectonic reconstructions of the plate indicates that local processes, such as contamination of the upper mantle by subducted materials or by western Pacific mantle plumes, did not produce the Indian Ocean-type signature in Philippine Sea plate MORB. It is more likely that the plate originated over a rapidly growing Indian Ocean upper mantle domain that had spread into the area between Australia/New Guinea and southeast Asia before 50 Ma.
Project(s):
Deep Sea Drilling Project (DSDP)
Coverage:
Median Latitude: 19.191735 * Median Longitude: 131.678132 * South-bound Latitude: 12.807200 * West-bound Longitude: 124.650800 * North-bound Latitude: 29.327500 * East-bound Longitude: 140.789000
Date/Time Start: 1973-06-23T00:00:00 * Date/Time End: 1978-03-03T00:00:00
Event(s):
31-291 * Latitude: 12.807200 * Longitude: 127.830800 * Date/Time: 1973-06-23T00:00:00 * Elevation: -5217.0 m * Penetration: 128 m * Recovery: 10.4 m * Location: North Pacific/Philippine Sea/TRENCH * Campaign: Leg31 * Basis: Glomar Challenger * Method/Device: Drilling/drill rig (DRILL) * Comment: 6 cores; 42.5 m cored; 0 m drilled; 24.4 % recovery
31-292 * Latitude: 15.818500 * Longitude: 124.650800 * Date/Time: 1973-06-26T00:00:00 * Elevation: -2943.0 m * Penetration: 443.5 m * Recovery: 242.8 m * Location: North Pacific/Philippine Sea/CONT RISE * Campaign: Leg31 * Basis: Glomar Challenger * Method/Device: Drilling/drill rig (DRILL) * Comment: 46 cores; 434 m cored; 9.5 m drilled; 56 % recovery
31-294 * Latitude: 22.579000 * Longitude: 131.535500 * Date/Time: 1973-07-06T00:00:00 * Elevation: -5784.0 m * Penetration: 118 m * Recovery: 23.2 m * Location: North Pacific/Philippine Sea/BASIN * Campaign: Leg31 * Basis: Glomar Challenger * Method/Device: Drilling/drill rig (DRILL) * Comment: 6 cores; 48.5 m cored; 3 m drilled; 47.8 % recovery
License:
Creative Commons Attribution 3.0 Unported (CC-BY-3.0)
Size:
2 datasets
Download Data
Datasets listed in this publication series
- Hickey-Vargas, R (1998): (Table 1) Major and trace element abundances in basalts and basaltic glasses from Philippine Sea DSDP sites. https://doi.org/10.1594/PANGAEA.701212
- Hickey-Vargas, R (1998): (Table 2) Sr, Nd and Pb isotope parameters for DSDP basalts from the West Philippine Basin. https://doi.org/10.1594/PANGAEA.701223