Scott, Robert (1981): Petrology and geochemistry at DSDP Site 59-448 [dataset publication series]. PANGAEA, https://doi.org/10.1594/PANGAEA.821197, Supplement to: Scott, R (1981): Petrology and geochemistry of Arc tholeiites on the Palau-Kyushu Ridge, Site 448, Deep Sea Drilling Project Leg 59. In: Kroenke, L; Scott, R; et al. (eds.), Initial Reports of the Deep Sea Drilling Project (U.S. Govt. Printing Office), 59, 681-692, https://doi.org/10.2973/dsdp.proc.59.130.1981
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Abstract:
This chemical and petrologic study of rocks from Site 448 on the Palau-Kyushu Ridge is designed to answer some fundamental questions concerning the volcanic origin of remnant island arcs. According to the reconstruction of the Western Pacific prior to about 45 m.y. ago (Hilde et al., 1977), the site of the Palau-Kyushu Ridge was a major transform fault. From a synthesis of existing geological and geophysical data (R. Scott et al., this volume), it appears that the ridge originated by subduction of the Pacific plate under the West Philippine Basin. Thus the Palau-Kyushu Ridge should be a prime example of both initial volcanism of an incipient arc formed by interaction of oceanic lithospheric plates and remnant-arc volcanic evolution. The Palau-Kyushu Ridge was an active island arc from about 42 to 30 m.y. ago, after which initiation of back-arc spreading formed the Parece Vela Basin (R. Scott et al., this volume; Karig, 1975a). This spreading left the western portion of the ridge as a remnant arc that separates the West Philippine Basin from the Parece Vela Basin. In spite of numerous oceanographic expeditions to the Philippine Sea, including the two previous DSDP Legs 6 and 31 (Fischer, Heezen et al., 1971; Karig, Ingle et al., 1975), and even though the origins of inter-arc basins have been linked by various hypotheses to that of remnant island arcs (Karig, 1971, 1972, 1975a, and 1975b; Gill, 1976; Uyeda and Ben-Avraham, 1972; Hilde et al., 1977), very little hard data are available on inactive remnant arcs.
Project(s):
Deep Sea Drilling Project (DSDP)
Coverage:
Latitude: 16.341000 * Longitude: 134.874200
Date/Time Start: 1978-02-13T00:00:00 * Date/Time End: 1978-02-13T00:00:00
Event(s):
59-448 * Latitude: 16.341000 * Longitude: 134.874200 * Date/Time: 1978-02-13T00:00:00 * Elevation: -3483.0 m * Penetration: 584.5 m * Recovery: 234.1 m * Location: North Pacific/Philippine Sea/RIDGE * Campaign: Leg59 * Basis: Glomar Challenger * Method/Device: Drilling/drill rig (DRILL) * Comment: 57 cores; 518 m cored; 66.5 m drilled; 45.2 % recovery
59-448A * Latitude: 16.341000 * Longitude: 134.874200 * Date/Time: 1978-02-13T00:00:00 * Elevation: -3483.0 m * Penetration: 914 m * Recovery: 226.7 m * Location: North Pacific/Philippine Sea/RIDGE * Campaign: Leg59 * Basis: Glomar Challenger * Method/Device: Drilling/drill rig (DRILL) * Comment: 66 cores; 704.5 m cored; 0 m drilled; 32.2 % recovery
License:
Creative Commons Attribution 3.0 Unported (CC-BY-3.0)
Size:
3 datasets
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Datasets listed in this publication series
- Scott, R (1981): (Table 3) Major-element chemistry of phases within flows, sills, and dikes from DSDP Site 59-448. https://doi.org/10.1594/PANGAEA.821195
- Scott, R (1981): (Table 2) Major-element whole-rock and glass chemistry of flows, dikes, sills, and clasts in breccias between flows from DSDP Site 59-448. https://doi.org/10.1594/PANGAEA.821194
- Scott, R (1981): (Table 4) Rare-earth element and other trace-element chemistry of whole rocks from DSDP Site 59-448. https://doi.org/10.1594/PANGAEA.821196