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Föllmi, Karl B; von Breymann, Marta T (1992): Geochemistry of phosphate and glauconites of ODP Leg 128 samples [dataset publication series]. PANGAEA, https://doi.org/10.1594/PANGAEA.776374, Supplement to: Föllmi, KB; von Breymann, MT (1992): Phospates and glauconites of Sites 798 and 799. In: Pisciotto, KA; Ingle, JCJr.; von Breymann, MT; Barron, J; et al. (eds.), Proceedings of the Ocean Drilling Program, Scientific Results, College Station, TX (Ocean Drilling Program), 127/128(1), 63-74, https://doi.org/10.2973/odp.proc.sr.127128-1.116.1992

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Abstract:
Glauconites and phosphates have been detected in almost all investigated samples at Sites 798 (uppermost Miocene or lower Pliocene to Pleistocene) and 799 (early middle Miocene to Pleistocene). Autochthonous occurrences appear in very minor quantities (generally below 0.2%) throughout the drilled sequences, whereas allochthonous accumulations are limited to the lower Pliocene or uppermost Miocene sequence at Site 798 (glauconites) and to the upper and middle Miocene sequence at Site 799 (upper and middle Miocene: glauconites; middle Miocene: phosphates). X-ray fluorescence, microprobe, and bulk chemical analyses indicate high variabilities in cations and anions and generally low oxide totals. This is probably related to the substitution of phosphate and fluoride aniors by hydroxide and carbonate anions in phosphates and to the depletion of iron, aluminum, and potassium cations and the enrichment in hydroxide and crystal water in glauconites. Gradients in pore-water contents of dissolved phosphate and fluoride at Sites 798 and 799 suggest a depth of phosphate precipitation between 30 and 50 mbsf, with fluoride as the limiting element for phosphate precipitation at Site 798. Phosphate and fluoride appear to be balanced at Site 799.
Crude extrapolations indicate that the Japan-Sea sediments may have taken up approximately 7.2*10**10 g P total/yr during the Neogene and Pleistocene. This amount corresponds to approximately 0.3% of the estimated present-day global transfer of phosphorus into the sediments and suggests that the Japan Sea constitutes an average sink for this element. The two main carriers of phosphorus into the present Japan Sea are the Tshushima and the Liman currents, importing approximately 6.6*10**10 g P and 5.7*10**10 g P per year, respectively. Bulk chemical analyses suggest that at least 36% of P total in the sediments is organically bound phosphorus. This rather high value, which corresponds to the measured Japan-Sea deep-water P organic/P total ratios, probably reflects rapid transport of organic phosphorus into the depth of the Japan Sea.
Project(s):
Ocean Drilling Program (ODP)
Coverage:
Median Latitude: 38.202233 * Median Longitude: 134.301973 * South-bound Latitude: 37.038500 * West-bound Longitude: 133.866500 * North-bound Latitude: 39.220500 * East-bound Longitude: 134.799600
Date/Time Start: 1989-08-28T10:24:00 * Date/Time End: 1989-10-12T03:40:00
Event(s):
128-798B * Latitude: 37.038500 * Longitude: 134.799600 * Date/Time Start: 1989-08-28T10:24:00 * Date/Time End: 1989-08-31T08:00:00 * Elevation: -911.0 m * Penetration: 517.9 m * Recovery: 514.42 m * Location: Japan Sea * Campaign: Leg128 * Basis: Joides Resolution * Method/Device: Drilling/drill rig (DRILL) * Comment: 54 cores; 517.9 m cored; 0 m drilled; 99.3 % recovery
128-799A * Latitude: 39.220500 * Longitude: 133.866900 * Date/Time Start: 1989-09-14T16:30:00 * Date/Time End: 1989-09-18T19:45:00 * Elevation: -2085.0 m * Penetration: 468.7 m * Recovery: 440.04 m * Location: Japan Sea * Campaign: Leg128 * Basis: Joides Resolution * Method/Device: Drilling/drill rig (DRILL) * Comment: 52 cores; 468.7 m cored; 0 m drilled; 93.9 % recovery
128-799B * Latitude: 39.220500 * Longitude: 133.866500 * Date/Time Start: 1989-10-02T22:36:00 * Date/Time End: 1989-10-12T03:40:00 * Elevation: -2084.0 m * Penetration: 1084 m * Recovery: 280.48 m * Location: Japan Sea * Campaign: Leg128 * Basis: Joides Resolution * Method/Device: Drilling/drill rig (DRILL) * Comment: 67 cores; 633 m cored; 0 m drilled; 44.3 % 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

  1. Föllmi, KB; von Breymann, MT (1992): (Table 3) Geochemistry of glauconite particles from ODP Leg 128 samples. https://doi.org/10.1594/PANGAEA.776372
  2. Föllmi, KB; von Breymann, MT (2012): (Table 1) Phosphate bulk chemical analyses of selected ODP Leg 128 samples. https://doi.org/10.1594/PANGAEA.776221
  3. Föllmi, KB; von Breymann, MT (1992): (Table 2) Geochemistry of phosphate particles from ODP Leg 128 samples. https://doi.org/10.1594/PANGAEA.776369