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Peterson, Larry S; Backman, Jan (1990): Late Cenozoic carbonate accumulation rates of ODP Leg 115 samples [dataset publication series]. PANGAEA, https://doi.org/10.1594/PANGAEA.755788, Supplement to: Peterson, LS; Backman, J (1990): Late Cenozoic carbonate accumulation and the history of the carbonate compensation depth in the western equatorial Indian Ocean. In: Duncan, RA; Backmann, J; Peterson, LC; et al. (eds.), Proceedings of the Ocean Drilling Program, Scientific Results, College Station, TX (Ocean Drilling Program), 115, 467-507, https://doi.org/10.2973/odp.proc.sr.115.163.1990

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Abstract:
The principal paleoceanographic objective of Ocean Drilling Program Leg 115 was to collect a suite of materials that would allow reconstruction of the dynamic features of the late Cenozoic carbonate system in the equatorial Indian Ocean. This goal was achieved with the recovery of sediments from a closely spaced depth transect (1541-4428 m) of five sites (Sites 707 through 711) from on and around the Mascarene Plateau that record the last 50 m.y. of pelagic deposition. More than 2200 measurements of carbonate content are combined here with a highly resolved bio- and magnetostratigraphy to produce the first detailed compilation of bulk, carbonate, and noncarbonate mass accumulation rates (MARs) from the Indian Ocean.
These results allow us to recognize three major depositional intervals, each characterized by a distinct depth-dependent pattern of carbonate accumulation: (1) the Paleogene, a time of moderate accumulation rates (0.4-0.7 g/cm**2/1000 yr) and reduced between-site accumulation differences; (2) the early and middle Miocene, a period characterized by greatly reduced carbonate MARs (typically <0.2 g/cm**2/1000 yr) at all sites and a shallow carbonate compensation depth; and (3) the late Miocene to Holocene, a time span marked by the highest bulk and carbonate accumulation rates of the last 50 Ma (1.6-1.8 g/cm**2/1000 yr), and the first appearance of substantial contrasts in carbonate accumulation as a function of the water depth of the drill site. The fundamentally different character of the carbonate system during each of these intervals must represent a regional response to the complex evolution of late Cenozoic oceans and climate.
Project(s):
Ocean Drilling Program (ODP)
Coverage:
Median Latitude: -2.936682 * Median Longitude: 63.002907 * South-bound Latitude: -7.545300 * West-bound Longitude: 59.016800 * North-bound Latitude: 5.060000 * East-bound Longitude: 73.786700
Date/Time Start: 1987-05-07T04:00:00 * Date/Time End: 1987-06-24T04:15:00
Event(s):
115-707A * Latitude: -7.545300 * Longitude: 59.016800 * Date/Time Start: 1987-05-27T14:10:00 * Date/Time End: 1987-05-28T18:30:00 * Elevation: -1553.0 m * Penetration: 213.3 m * Recovery: 160.27 m * Location: South Indian Ridge, South Indian Ocean * Campaign: Leg115 * Basis: Joides Resolution * Method/Device: Drilling/drill rig (DRILL) * Comment: 24 cores; 213.3 m cored; 0 m drilled; 75.1 % recovery
115-708A * Latitude: -5.455800 * Longitude: 59.943800 * Date/Time Start: 1987-06-02T18:00:00 * Date/Time End: 1987-06-04T12:30:00 * Elevation: -4107.0 m * Penetration: 236.2 m * Recovery: 189.72 m * Location: South Indian Ridge, South Indian Ocean * Campaign: Leg115 * Basis: Joides Resolution * Method/Device: Drilling/drill rig (DRILL) * Comment: 25 cores; 236.2 m cored; 0 m drilled; 80.3 % recovery
115-709A * Latitude: -3.915000 * Longitude: 60.551700 * Date/Time Start: 1987-06-05T01:30:00 * Date/Time End: 1987-06-06T06:30:00 * Elevation: -3047.0 m * Penetration: 203.1 m * Recovery: 184.74 m * Location: South Indian Ridge, South Indian Ocean * Campaign: Leg115 * Basis: Joides Resolution * Method/Device: Drilling/drill rig (DRILL) * Comment: 21 core; 203.1 m cored; 0 m drilled; 91 % recovery
License:
Creative Commons Attribution 3.0 Unported (CC-BY-3.0)
Size:
7 datasets

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Datasets listed in this publication series

  1. Peterson, LS; Backman, J (1990): (Table 1) Control points and sedimentation rates of ODP Leg 115 holes. https://doi.org/10.1594/PANGAEA.755787
  2. Peterson, LS; Backman, J (1990): (Appendix A) Calcium carbonate concentrations and accumulation rates of ODP Hole 115-707A. https://doi.org/10.1594/PANGAEA.755780
  3. Peterson, LS; Backman, J (1990): (Appendix A) Calcium carbonate concentrations and accumulation rates of ODP Hole 115-708A. https://doi.org/10.1594/PANGAEA.755781
  4. Peterson, LS; Backman, J (1990): (Appendix A) Calcium carbonate concentrations and accumulation rates of ODP Site 115-709. https://doi.org/10.1594/PANGAEA.755786
  5. Peterson, LS; Backman, J (1990): (Appendix A) Calcium carbonate concentrations and accumulation rates of ODP Hole 115-710A. https://doi.org/10.1594/PANGAEA.755782
  6. Peterson, LS; Backman, J (1990): (Appendix A) Calcium carbonate concentrations and accumulation rates of ODP Site 115-711. https://doi.org/10.1594/PANGAEA.755784
  7. Peterson, LS; Backman, J (1990): (Appendix A) Calcium carbonate concentrations and accumulation rates of ODP Hole 115-714A. https://doi.org/10.1594/PANGAEA.755783