Bonatti, Enrico; Kolla, V; Moore, Willard S; Stern, C (1979): Rare and trace element analyses from DSDP Holes 31-291 and 31-294 from the Philippine Sea [dataset publication series]. PANGAEA, https://doi.org/10.1594/PANGAEA.761928, Supplement to: Bonatti, E et al. (1979): Metallogenesis in marginal basins: Fe-rich basal deposits from the Philippine Sea. Marine Geology, 32(1-2), 21-37, https://doi.org/10.1016/0025-3227(79)90144-0
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Abstract:
Metal-rich sediments were found in the West Philippine Basin at DSDP sites 291 (located about 500 km SW of the Philippine Ridge or Central Basin Fault) and 294/295 (located about 580 km NE of the Philippine Ridge). In both cases the metalliferous deposits constitute a layer, probably Eocene in age, resting directly above the basaltic basement at the bottom of the sediment column. The chemistry of the major (including Fe and Mn) and trace elements (including trace metals, rare earth elements, U and Th) suggest a strong similarity of these deposits to metalliferous deposits produced by hydrothermal activity at oceanic spreading centers. Well-crystallized hematite is a major component of the metal-rich deposits at site 294/295. We infer that the Philippine Sea deposits were formed at some spreading center by hydrothermal processes of metallogenesis, similar to processes occurring at oceanic spreading centers. A locus for their formation might have been the Philippine Ridge (Central Basin Fault), probably an extinct spreading center. We conclude that metallogenesis of the type occurring at oceanic spreading centers can take place also in marginal basins. This has implications for the origin of metal deposits found in some ophiolite complexes, such as those in Luzon (Philippines), which may represent fragments of former marginal basins rather than of oceanic lithosphere.
Project(s):
Deep Sea Drilling Project (DSDP)
Coverage:
Median Latitude: 20.136050 * Median Longitude: 130.609325 * South-bound Latitude: 12.807200 * West-bound Longitude: 127.830800 * North-bound Latitude: 22.579000 * East-bound Longitude: 131.535500
Date/Time Start: 1973-06-23T00:00:00 * Date/Time End: 1973-07-06T00:00:00
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
31-294 * 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:
4 datasets
Download Data
Datasets listed in this publication series
- Bonatti, E; Kolla, V; Moore, WS et al. (1979): (Table 3) Major and trace element analyses from DSDP Hole 31-291. https://doi.org/10.1594/PANGAEA.761885
- Kolla, V; Moore, WS; Stern, C (1979): (Table 4) Major and trace element analyses from DSDP Hole 31-294. https://doi.org/10.1594/PANGAEA.761894
- Bonatti, E; Kolla, V; Moore, WS et al. (1979): (Table 5) Concentration of some rare earth elements in two samples of metal-rich sediment from DSDP Hole 31-294. https://doi.org/10.1594/PANGAEA.761895
- Bonatti, E; Kolla, V; Moore, WS et al. (1979): (Table 6) U, Th, 234U/238U and 230Th/234U values in metal-rich deposits from DSDP Hole 31-294. https://doi.org/10.1594/PANGAEA.761896