Lin, Ping-Nan (1992): Trace element abundances and Sr and Nd isotope compositions in bulk sediments from DSDP Legs 6 and 20 [dataset publication series]. PANGAEA, https://doi.org/10.1594/PANGAEA.707798, Supplement to: Lin, P-N (1992): Trace element and isotopic characteristics of western Pacific pelagic sediments: Implications for the petrogenesis of Mariana Arc magmas. Geochimica et Cosmochimica Acta, 56(4), 1641-1654, https://doi.org/10.1016/0016-7037(92)90231-7
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Abstract:
Rare earth element and Nd isotopic data for ten representative samples of Lower Cretaceous to Miocene pelagic sediments from the western Pacific indicate a wide range of compositions for sediments being subducted beneath the Mariana and Volcano arcs. All samples are enriched in light rare earth elements and show negative Eu and Ce anomalies. The values of e-Nd range from +0.6 to -7.3. These data are used to calculate the Bulk Western Pacific Sediment (BWPS), which is characterized by low Sr/Nd (10), Ba/La (13), and e-Nd (-5.2) and high 87Sr/86Sr (0.7078) compared to that of Mariana and Volcano arc lavas. This composite sediment is used to refine a mixing model for the origin of Mariana and Volcano arc melts. Some lavas from the northern Mariana Arc have Ba/La higher than that of BWPS, which indicates that a third component is required. The high Ba/La in the mantle source for these lavas is interpreted to result from multiple episodes of fluid fractionation. The mixing model indicates that a minor amount of sediment and a low proportion of metasomatic fluid fluxes the mantle source at a late stage when the subarc mantle is already highly metasomatized. This model also suggests that the mantle source for arc melts is affected more by metasomatic fluids than by melting or bulk mixing of sediments.
Project(s):
Deep Sea Drilling Project (DSDP)
Coverage:
Median Latitude: 20.973000 * Median Longitude: 151.329250 * South-bound Latitude: 11.780000 * West-bound Longitude: 146.978800 * North-bound Latitude: 32.773300 * East-bound Longitude: 156.172300
Date/Time Start: 1969-07-31T00:00:00 * Date/Time End: 1971-10-23T00:00:00
Event(s):
6-59 * Latitude: 11.780000 * Longitude: 147.581700 * Date/Time: 1969-07-31T00:00:00 * Elevation: -5554.0 m * Penetration: 122.5 m * Location: North Pacific * Campaign: Leg6 * Basis: Glomar Challenger * Method/Device: Drilling/drill rig (DRILL) * Comment: 0 cores; 0 m cored; 0.6 m drilled; % recovery
20-195B * Latitude: 32.773300 * Longitude: 146.978800 * Date/Time: 1971-09-22T00:00:00 * Elevation: -5968.0 m * Penetration: 392 m * Recovery: 1.5 m * Location: North Pacific/ABYSSAL FLOOR * Campaign: Leg20 * Basis: Glomar Challenger * Method/Device: Drilling/drill rig (DRILL) * Comment: 1 cores; 3 m cored; 13.5 m drilled; 50 % recovery
20-198A * Latitude: 25.825700 * Longitude: 154.584200 * Date/Time: 1971-10-10T00:00:00 * Elevation: -5958.0 m * Penetration: 258 m * Recovery: 25.7 m * Location: North Pacific/BASIN * Campaign: Leg20 * Basis: Glomar Challenger * Method/Device: Drilling/drill rig (DRILL) * Comment: 4 cores; 34.5 m cored; 16.5 m drilled; 74.5 % recovery
License:
Creative Commons Attribution 3.0 Unported (CC-BY-3.0)
Size:
4 datasets
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Datasets listed in this publication series
- Lin, P-N (1992): (Table 1) Trace element abundances and Sr and Nd isotope compositions in bulk sediments from DSDP Hole 6-59. https://doi.org/10.1594/PANGAEA.707796
- Lin, P-N (1992): (Table 1) Trace element abundances and Sr and Nd isotope compositions in bulk sediments from DSDP Hole 20-195B. https://doi.org/10.1594/PANGAEA.707792
- Lin, P-N (1992): (Table 1) Trace element abundances and Sr and Nd isotope compositions in bulk sediments from DSDP Hole 20-198A. https://doi.org/10.1594/PANGAEA.707793
- Lin, P-N (1992): (Table 1) Trace element abundances and Sr and Nd isotope compositions in bulk sediments from DSDP Hole 20-199. https://doi.org/10.1594/PANGAEA.707794