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Firth, John V; Isiminger-Kelso, MaLynn (1992): Calcareous nannofossils from the Sumisu Rift and Izu-Bonin Forearc Basin [dataset publication series]. PANGAEA, https://doi.org/10.1594/PANGAEA.729566, Supplement to: Firth, JV; Isiminger-Kelso, ML (1992): Pleistocene and Oligocene-Miocene calcareous nannofossils from the Sumisu Rift and Izu-Bonin Forearc Basin. In: Taylor, B; Fujioka, K; et al. (eds.), Proceedings of the Ocean Drilling Program, Scientific Results, College Station, TX (Ocean Drilling Program), 126, 237-262, https://doi.org/10.2973/odp.proc.sr.126.131.1992

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Abstract:
During Ocean Drilling Program Leg 126, we recovered three expanded Pleistocene sections from the active backarc rift (Sumisu Rift) and three expanded Oligocene-Miocene sections from the forearc basin of the Izu-Bonin volcanic island arc. Quantitative analysis of the Pleistocene nannofossils revealed five major assemblages between 0 and LO Ma: Assemblage 1 (Holocene-0.085 Ma) contains dominant Emiliania huxleyi; Assemblage 2 (ca. 0.085-0.275 Ma) contains dominant small Gephyrocapsa and common E. huxleyi and Gephyrocapsa oceanica; Assemblage 3 (ca. 0.275-0.6 Ma) contains dominant Gephyrocapsa caribbeanica; Assemblage 4 (ca. 0.6-0.9 Ma) contains a peak abundance of small Gephyrocapsa in the middle part, and dominant occurrences of two types of G. caribbeanica in the lower and upper parts; and Assemblage 5 (ca. 0.9-1.0 Ma) contains dominant small Gephyrocapsa and common G. caribbeanica and Reticulofenestra asanoi. These assemblages are largely synchronous with similar assemblages recognized from tropical and subtropical regions, and can be used for finer subdivision of the Pleistocene than that based on standard Pleistocene nannofossil datums.
The Oligocene-Miocene sections contain several hiatuses: up to 3 m.y. may be missing from the uppermost Oligocene (Zone CP19) at Sites 792 and 793; all of Zone CN2 is missing at Sites 792 and 793; part of Zone CN3 and all of Zone CN4 are missing at Site 792. Biochronology of several nannofossil datums at Leg 126 sites indicate that Sphenolithus distentus, Sphenolithus ciperoensis, Cyclicargolithus floridanus, and Discoaster kugleri have diachronous occurrences compared with other sites in the western Pacific Ocean and Philippine Sea.
Project(s):
Ocean Drilling Program (ODP)
Coverage:
Median Latitude: 31.720619 * Median Longitude: 140.466252 * South-bound Latitude: 30.915400 * West-bound Longitude: 139.843900 * North-bound Latitude: 32.399800 * East-bound Longitude: 140.888150
Date/Time Start: 1989-04-23T00:00:00 * Date/Time End: 1989-06-17T18:55:00
Event(s):
126-787 * Latitude: 32.375700 * Longitude: 140.749400 * Date/Time Start: 1989-04-23T00:00:00 * Date/Time End: 1989-04-27T00:00:00 * Elevation: -3265.0 m * Penetration: 354.6 m * Recovery: 159.9 m * Location: North Pacific Ocean * Campaign: Leg126 * Basis: Joides Resolution * Method/Device: Composite Core (COMPCORE) * Comment: 34 cores; 320.1 m cored; 0 m drilled; 49.9% recovery
126-787B * Latitude: 32.375700 * Longitude: 140.749400 * Date/Time Start: 1989-04-24T14:55:00 * Date/Time End: 1989-04-27T12:00:00 * Elevation: -3265.0 m * Penetration: 320.1 m * Recovery: 159.88 m * Location: North Pacific Ocean * Campaign: Leg126 * Basis: Joides Resolution * Method/Device: Drilling/drill rig (DRILL) * Comment: 34 cores; 320.1 m cored; 0 m drilled; 49.9 % recovery
126-790A * Latitude: 30.915400 * Longitude: 139.843900 * Date/Time Start: 1989-04-29T15:56:00 * Date/Time End: 1989-04-30T06:30:00 * Elevation: -2233.0 m * Penetration: 37.4 m * Recovery: 35.71 m * Location: Philippine Sea * Campaign: Leg126 * Basis: Joides Resolution * Method/Device: Drilling/drill rig (DRILL) * Comment: 4 cores; 37.4 m cored; 0 m drilled; 95.5 % recovery
License:
Creative Commons Attribution 3.0 Unported (CC-BY-3.0)
Size:
10 datasets

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Datasets listed in this publication series

  1. Firth, JV; Isiminger-Kelso, ML (1992): (Table 5) Range chart of relative abundances of late Oligocene nannofossils in ODP Hole 126-787B. https://doi.org/10.1594/PANGAEA.729555
  2. Firth, JV; Isiminger-Kelso, ML (1992): (Table 2) Numerical abundances of nannofossil taxa in ODP Hole 126-790A. https://doi.org/10.1594/PANGAEA.729552
  3. Firth, JV; Isiminger-Kelso, ML (1992): (Table 3) Numerical abundances of nannofossil taxa in ODP Hole 126-791A. https://doi.org/10.1594/PANGAEA.729553
  4. Firth, JV; Isiminger-Kelso, ML (1992): (Table 4) Numerical abundances of nannofossil taxa in ODP Hole 126-792A. https://doi.org/10.1594/PANGAEA.729554
  5. Firth, JV; Isiminger-Kelso, ML (1992): (Table 6) Range chart of relative abundances of late Oligocene nannofossils in ODP Hole 126-792E. https://doi.org/10.1594/PANGAEA.729556
  6. Firth, JV; Isiminger-Kelso, ML (1992): (Table 9) Range chart of relative abundances of Miocene nannofossils in ODP Hole 126-792E. https://doi.org/10.1594/PANGAEA.729558
  7. Firth, JV; Isiminger-Kelso, ML (1992): (Table 7) Range chart of relative abundances of Oligocene nannofossils in ODP Hole 126-793B. https://doi.org/10.1594/PANGAEA.729557
  8. Firth, JV; Isiminger-Kelso, ML (1992): (Table 10) Range chart of relative abundances of early Miocene nannofossils in ODP Hole 126-793B. https://doi.org/10.1594/PANGAEA.729559
  9. Firth, JV; Isiminger-Kelso, ML (1992): (Table 8) Ages and depths of magnetic reversal datums of ODP Leg 126 sites. https://doi.org/10.1594/PANGAEA.729562
  10. Firth, JV; Isiminger-Kelso, ML (1992): (Table 11) Depth and interpolated age values of selected nannofossil species datums of ODP Leg 126 sites. https://doi.org/10.1594/PANGAEA.729565