Hovan, Steven A; Rea, David K (1991): Eolian accumulation rates of ODP Leg 121 holes [dataset publication series]. PANGAEA, https://doi.org/10.1594/PANGAEA.758950, Supplement to: Hovan, SA; Rea, DK (1991): Post-Eocene record of eolian deposition at Sites 752, 754, and 756, eastern Indian Ocean. In: Weissel, J; Peirce, J; Taylor, E; et al. (eds.), Proceedings of the Ocean Drilling Program, Scientific Results, College Station, TX (Ocean Drilling Program), 121, 219-228, https://doi.org/10.2973/odp.proc.sr.121.125.1991
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Abstract:
The late Cenozoic history of eolian sedimentation in the eastern Indian Ocean was developed from samples recovered during drilling of Sites 752, 754, and 756. Temporal changes in the mass accumulation rate of eolian material reflect major climatic shifts in the southern African source region. A significant drop in dust mass flux values occurs near the end of the lower Oligocene. Younger sediments are characterized by a gradual reduction in dust accumulation rates until the middle Miocene after which values remain consistently low throughout the late Cenozoic, although a slight increase in eolian accumulation rate occurs near 2.5 Ma. This pattern of dust mass flux appears related to the supply of dust-sized particles in the source region and represents a shift in the climatic regime of southern Africa to increasingly more arid conditions throughout the late Cenozoic.
Project(s):
Ocean Drilling Program (ODP)
Coverage:
Median Latitude: -29.729333 * Median Longitude: 91.580433 * South-bound Latitude: -30.941000 * West-bound Longitude: 87.596800 * North-bound Latitude: -27.356000 * East-bound Longitude: 93.578000
Date/Time Start: 1988-05-10T03:15:00 * Date/Time End: 1988-05-26T12:35:00
Event(s):
121-752A * Latitude: -30.891000 * Longitude: 93.578000 * Date/Time Start: 1988-05-10T03:15:00 * Date/Time End: 1988-05-12T13:55:00 * Elevation: -1097.0 m * Penetration: 317.6 m * Recovery: 217.32 m * Location: South Indian Ridge, South Indian Ocean * Campaign: Leg121 * Basis: Joides Resolution * Method/Device: Drilling/drill rig (DRILL) * Comment: 34 cores; 317.6 m cored; 0 m drilled; 68.4 % recovery
121-754A * Latitude: -30.941000 * Longitude: 93.566500 * Date/Time Start: 1988-05-13T18:30:00 * Date/Time End: 1988-05-15T05:15:00 * Elevation: -1075.0 m * Penetration: 172.1 m * Recovery: 128.27 m * Location: South Indian Ridge, South Indian Ocean * Campaign: Leg121 * Basis: Joides Resolution * Method/Device: Drilling/drill rig (DRILL) * Comment: 23 cores; 170 m cored; 0 m drilled; 75.5 % recovery
121-756B * Latitude: -27.356000 * Longitude: 87.596800 * Date/Time Start: 1988-05-26T04:00:00 * Date/Time End: 1988-05-26T12:35:00 * Elevation: -1529.0 m * Penetration: 104.3 m * Recovery: 105.7 m * Location: South Indian Ridge, South Indian Ocean * Campaign: Leg121 * Basis: Joides Resolution * Method/Device: Drilling/drill rig (DRILL) * Comment: 11 core; 104.3 m cored; 0 m drilled; 101.3 % 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
- Hovan, SA; Rea, DK (1991): (Table 1) Linear sedimentation rates and accumulation rates of eolian deposits in ODP Hole 121-752A. https://doi.org/10.1594/PANGAEA.758942
- Hovan, SA; Rea, DK (1991): (Table 2) Linear sedimentation rates and accumulation rates of eolian deposits in ODP Hole 121-754A. https://doi.org/10.1594/PANGAEA.758943
- Hovan, SA; Rea, DK (1991): (Table 3) Linear sedimentation rates and accumulation rates of eolian deposits in ODP Hole 121-756B. https://doi.org/10.1594/PANGAEA.758944