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Van der Flier-Keller, Eileen (1991): Geochemistry and mineralogy of sediments from the Atlantis II Fracture Zone [dataset publication series]. PANGAEA, https://doi.org/10.1594/PANGAEA.757664, Supplement to: Van der Flier-Keller, E (1991): Geochemistry and mineralogy of sediments, Atlantis II Fracture Zone, Southwest Indian Ocean. In: Von Herzen, RP; Robinson, PT; et al. (eds.), Proceedings of the Ocean Drilling Program, Scientific Results, College Station, TX (Ocean Drilling Program), 118, 145-151, https://doi.org/10.2973/odp.proc.sr.118.164.1991

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Abstract:
Thirteen sediment samples, including calcareous ooze, sandy clay, volcanic sand, gravel, and volcanic breccia, from Ocean Drilling Program (ODP) Sites 732B, 734B, 734G and Conrad Cruise 27-9, Station 17, were examined. Contents of major and trace elements were determined using XRF or ICP (on samples <0.5 g). Determinations of rare earth elements (REE) were performed using ICP-MS. Mineralogy was determined using XRD.
On the basis of the samples studied, the sediments accumulating in the Atlantis II Fracture Zone are characterized by generally high MgO, Cr, and Ni contents compared with other deep-sea sediments. A variety of sources are reflected in the mineralogy and geochemistry of these sediments. Serpentine, brucite, magnetite, and high MgO, Cr, and Ni contents indicate derivation from ultramafic basement. The occurrence of albite, analcime, primary mafic minerals, and smectite/chlorite in some samples, coupled with high SiO2, Al2O3, TiO2, Fe2O3, V, and Y indicate contribution from basaltic basement. A third major sediment source is characterized as biogenic material and is reflected primarily in the presence of carbonate minerals, and high CaO, Sr, Pb, and Zn in certain samples. Kaolinite, illite, quartz, and some chlorite are most likely derived from continental areas or other parts of the ocean by long-distance sediment transport in surface or other ocean currents. Proportions of source materials in the sediments reflect the thickness of the sediment cover, slope of the seafloor, and the nature of and proximity to basement lithologies. REE values are low compared to other deep-sea sediments and indicate no evidence of hydrothermal activity in the Atlantis II Fracture Zone sediments. This is supported by major- and trace-element data.
Project(s):
Ocean Drilling Program (ODP)
Coverage:
Median Latitude: -32.164671 * Median Longitude: 57.099042 * South-bound Latitude: -32.547000 * West-bound Longitude: 57.054800 * North-bound Latitude: -31.568300 * East-bound Longitude: 57.140000
Date/Time Start: 1987-10-27T20:30:00 * Date/Time End: 1987-11-13T21:00:00
Event(s):
118-732B * Latitude: -32.547000 * Longitude: 57.054800 * Date/Time Start: 1987-10-27T20:30:00 * Date/Time End: 1987-10-28T06:25:00 * Elevation: -4889.0 m * Penetration: 8 m * Recovery: 1.9 m * Location: South Indian Ridge, South Indian Ocean * Campaign: Leg118 * Basis: Joides Resolution * Method/Device: Drilling/drill rig (DRILL) * Comment: 1 core; 8 m cored; 0 m drilled; 23.8 % recovery
118-734B * Latitude: -32.114000 * Longitude: 57.130000 * Date/Time Start: 1987-11-09T06:30:00 * Date/Time End: 1987-11-09T23:00:00 * Elevation: -3682.0 m * Penetration: 47.5 m * Recovery: 1.1 m * Location: South Indian Ridge, South Indian Ocean * Campaign: Leg118 * Basis: Joides Resolution * Method/Device: Drilling/drill rig (DRILL) * Comment: 5 cores; 47.5 m cored; 0 m drilled; 2.3 % recovery
118-734G * Latitude: -32.116000 * Longitude: 57.135000 * Date/Time Start: 1987-11-12T06:30:00 * Date/Time End: 1987-11-13T21:00:00 * Elevation: -3429.0 m * Penetration: 31 m * Recovery: 5.95 m * Location: South Indian Ridge, South Indian Ocean * Campaign: Leg118 * Basis: Joides Resolution * Method/Device: Drilling/drill rig (DRILL) * Comment: 3 cores; 31 m cored; 0 m drilled; 19.2 % recovery
License:
Creative Commons Attribution 3.0 Unported (CC-BY-3.0)
Size:
5 datasets

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Datasets listed in this publication series

  1. Van der Flier-Keller, E (1991): (Table 1) Lithology of sediments from the Atlantis II Fracture Zone. https://doi.org/10.1594/PANGAEA.757655
  2. Van der Flier-Keller, E (1991): (Table 3) Major and trace element contents of Atlantis II Fracture Zone sediments. https://doi.org/10.1594/PANGAEA.757659
  3. Van der Flier-Keller, E (1991): (Table 5) Major and trace element contents of sand and mud splits of selected Atlantis II Fracture Zone sediments. https://doi.org/10.1594/PANGAEA.757663
  4. Van der Flier-Keller, E (1991): (Table 2) Mineralogy of sediment samples from the Atlantis II Fracture Zone. https://doi.org/10.1594/PANGAEA.757657
  5. Van der Flier-Keller, E (1991): (Table 4) REE contents of Atlantis II Fracture Zone sediments. https://doi.org/10.1594/PANGAEA.757661