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Leg 199 summary

By J. Backman, W.H. Busch, H.K. Coxall, K. Faul, P.A. Gaillot, S.A. Hovan, T.R. Janecek, P. Knoop, S. Kruse, L. Lanci, C.H. Lear, M. Lyle, T.C. Moore, C.A. Nigrini, H. Nishi, R. Nomura, R.D. Norris, H. Pälike, J.M. Parés, L. Quintin, I. Raffi, B.R. Rea, D.K. Rea, T.H. Steiger, A.K. Tripati, M.D. Vanden Berg, B.S. Wade and P.A. Wilson

Abstract

Ocean Drilling Program (ODP) Leg 199, "The Paleogene Equatorial Transect" (Sites 1215-1222), was designed to study the evolution of the equatorial Pacific current and wind system as Earth went from maximum Cenozoic warmth to initial Antarctic glaciations. The drilling program was primarily devoted to a transect along the 56- to 57-Ma crust, old enough to capture the Paleocene/Eocene boundary in the basal, more carbonate-rich sediments. The Leg 199 transect extends from a paleolatitude of ~4°N- ~4°S to encompass a relatively thick lower Eocene sediment section perhaps 8° north of the paleoequator. One site (1218) was also drilled on ~40-Ma crust to collect a near-equatorial sediment sequence from the middle Eocene to the Oligocene in order to investigate the transition in global climate from the Eocene "greenhouse" to Oligocene "icehouse." <br/>The Pacific plate has drifted northward through Cenozoic time transporting biogenic sediments deposited under the high-productivity equatorial belt into a zone of extremely slow sediment (red clay) accumulation. Thus, the central tropical North Pacific Ocean is an ideal region in which to sample shallowly buried Paleogene sequences of equatorially deposited biogenic sediments. The thin Neogene cover of red clay in the area means that the entire Paleogene sediment section is potentially drillable by ODP advanced piston coring and extended core barrel methods

Topics: QE
Publisher: Texas A & M University Ocean Drilling Program (CDROM)
Year: 2002
OAI identifier: oai:eprints.soton.ac.uk:41902
Provided by: e-Prints Soton

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  1. (1994). A 57 Ma Pacific plate paleomagnetic pole determined from a skewness analysis of crossings of marine magnetic anomaly 25r,
  2. (1997). A blast of gas in the latest Paleocene: simulating first-order effects of massive dissociation of oceanic methane hydrate.
  3. (1995). A new late Neogene time scale: application to Leg 138 sites. In
  4. (1993). Abrupt climate changes and transient climates during the Paleogene: a marine perspective.
  5. (1991). Abrupt deep-sea warming, paleoceanographic changes and benthic extinctions at the end of the Paleocene.
  6. (1991). Astronomical calibration of Gauss to Matuyama sapropels in the Mediterranean and implication for the geomagnetic polarity time scale.
  7. (1999). Astronomical calibration of Oligocene–Miocene time.
  8. (2001). Astronomical forcing in late Eocene marine sediments.
  9. (1979). Biogenic silica accumulation in the central equatorial Pacific and its implications for Cenozoic paleoceanography
  10. (1998). Biogeography of the late Paleocene benthic foraminiferal extinction. In
  11. (2001). Biostratigraphic implications of mid-latitude Palaeocene–Eocene radiolarian faunas from Hole 1051A, ODP Leg 171B, Blake Nose,
  12. (2001). Carbon addition and removal during the Late Palaeocene Thermal Maximum: basic theory with a preliminary treatment of the isotope record at ODP Site 1051, Blake Nose. In
  13. (1999). Carbon cycling and chronology of climate warming during the Palaeocene/Eocene transition.
  14. (2000). Cenozoic deep-sea temperatures and global ice volumes from Mg/Ca in benthic foraminiferal calcite.
  15. (1998). Cenozoic global sea level, sequences, and the New Jersey transect: results from coastal plain and continental slope drilling.
  16. (1975). Cenozoic history and paleoceanography of the central equatorial Pacific Ocean: a regional synthesis of Deep Sea Drilling Project data.
  17. (1974). Cenozoic migration of the Pacific plate, northward shift of the axis of deposition, and paleobathymetry of the central equatorial Pacific.
  18. (2001). Climate response to orbital forcing across the Oligocene–Miocene boundary.
  19. (2000). Climatic response to tropical sea surface temperature changes on a “greenhouse” Earth.
  20. (1985). CO2-induced change in a coupled oceanatmosphere model and its paleoclimatic implications.
  21. (1998). Code numbers for Cenozoic low latitude radiolarian biostratigraphic zones and GPTS conversion tables.
  22. (2000). Comparison of zonal temperature profiles for past warm time periods. In
  23. (1992). Composition maps of surface sediments of the eastern tropical Pacific Ocean. In
  24. (1992). Correlation between isotope records in marine and continental carbon reservoirs near the Palaeocene/Eocene boundary.
  25. (1999). Current plate velocities relative to the hotspots incorporating the NUVEL-1 global plate motion model.
  26. (1995). Dissociation of oceanic methane hydrate as a cause of the carbon isotope excursion at the end of the Paleocene.
  27. (2001). Eocene oceanic responses to orbital forcing on precessional time scales.
  28. (1990). Eocene–Oligocene sea-level changes on the New Jersey coastal plain linked to the deep-sea record.
  29. (1983). Eolian deposition in the northeast Pacific Ocean: Cenozoic history of atmospheric circulation.
  30. (2002). Equatorial Ocean circulation in an extreme warm climate: Paleoceanography,
  31. (1986). Equatorial Pacific seismic reflectors as indicators of global oceanographic events.
  32. (1996). Equatorial sea-surface temperatures for the Maastrichtian revealed through remarkable preservation of metastable carbonate.
  33. (1992). Evidence from the antarctic continental margin of late Paleogene ice sheets: a manifestation of plate reorganization and synchronous changes in atmospheric circulation over the emerging Southern Ocean? In
  34. (1998). Evolutionary consequences of the Latest Paleocene Thermal Maximum for tropical planktonic foraminifera.
  35. (1991). Extension of the astronomically calibrated (polarity) time scale to the Miocene/Pliocene boundary.
  36. (1998). Geochemical evidence for a comet shower in the late Eocene.
  37. (1990). Global change at the Paleocene–Eocene boundary: climatic and evolutionary consequences of tectonic events.
  38. (2000). Global change—deciphering methane’s fingerprint.
  39. (2000). Global cooling accelerated by early–late Eocene impacts?
  40. (1996). Global implications of lower to middle Eocene sequence boundaries on the New Jersey Coastal Plain—the Icehouse cometh.
  41. (1989). GMAP32-Geographic Mapping and Reconstruction System, Geological Survey of Norway.
  42. (1996). High resolution (104 yr) deep-sea foraminiferal stable isotope records of the Eocene–Oligocene climate transition.
  43. (1999). Hot LIPs and mantle methane.
  44. (1996). Impact origin of the Chesapeake Bay structure and the source of the North American tectites.
  45. (1993). Integrated late Eocene–Oligocene stratigraphy of the Alabama coastal plain: correlation of hiatuses and stratal surfaces to glacioeustatic lowerings.
  46. (1990). Late Cretaceous through Neogene deep-sea benthic foraminifers (Maud Rise,
  47. (1985). Late Eocene microtektites and radiolarian extinctions on Barbados.
  48. (1995). Late Paleocene to Eocene paleoceanography of the equatorial Pacific Ocean: stable isotopes recorded at Ocean Drilling Program Site 865, Allison Guyot.
  49. (1990). Latest Cretaceous to Cenozoic climate and oceanographic developments in the Weddell Sea, Antarctica: an ocean-drilling perspective.
  50. (1996). Latest Paleocene benthic foraminiferal extinction and environmental changes at Tawanui, New Zealand.
  51. (1989). Magnetic lineations of the world’s ocean basins.
  52. (2000). Massive dissociation of gas hydrate during a Jurassic oceanic anoxic event.
  53. (1999). Mechanisms of climate warming at the end of the Paleocene.
  54. (1998). Modeling Cenozoic sedimentation in the central equatorial Pacific and implications for true polar wander.
  55. (2001). Numerical evidence against reversed thermohaline circulation in the warm Paleocene/Eocene ocean.
  56. (2001). Numerical models of diagenesis, sediment properties and pore fluid chemistry on a paleoceanographic transect: Blake Nose, Ocean Drilling Program Leg 171B.
  57. (1986). Palaeogene stable isotope events.
  58. (1992). Paleocene/Eocene boundary changes in atmospheric and oceanic circulation: a Southern Hemisphere record.
  59. (1992). Paleogene and early Neogene deep water history of the Indian Ocean: inferences from stable isotopic records. In
  60. (2001). Paleoproductivity increase at the Eocene– Oligocene climatic transition:
  61. (1975). Paleotemperature history of the Cenozoic and the initiation of Antarctic glaciation: oxygen and carbon isotope analyses in DSDP Sites 277, 279, and 281. In
  62. (1974). Plate stratigraphy and the fluctuating carbonate line.
  63. (1999). Precision and accuracy of nannofossil biostratigraphic correlation.
  64. (1973). Printing Office).
  65. (1969). Radiolaria: change in skeletal weight and resistance to solution.
  66. (1996). Rapid diversification of planktonic foraminifera in the tropical Pacific (ODP Site 865) during the last Paleocene Thermal Maximum.
  67. (2000). Recent advances in paleoclimate modeling: toward better simulations of warm paleoclimates. In
  68. (2000). Reconstructing the stratal geometry of latest Eocene to Oligocene sequences in New Jersey: resolving a patchwork distribution into a clear pattern of progradation.
  69. (1999). Research in the Great Australian Bight yields exciting early results.
  70. (1995). Revised calibration of the geomagnetic polarity timescale for the Late Cretaceous
  71. (1985). Seismic modeling and paleoceanography at Deep Sea Drilling Project Site 574. In
  72. (1995). Seismic stratigraphy of the eastern equatorial Pacific Ocean: paleoceanographic implications. In
  73. (1986). Stepwise mass extinctions and impact events: late Eocene to early Oligocene.
  74. (2000). Termination of global warmth at the Palaeocene–Eocene boundary through productivity feedback.
  75. (1987). Tertiary oxygen isotope synthesis, sea-level history, and continental margin erosion.
  76. (1980). Tertiary δ18O record and glacio-eustatic sealevel fluctuations.
  77. (2002). Testing the Cretaceous greenhouse using glassy foraminfera from the core of the Turonian tropics on Demerara Rise.
  78. (1997). The age of the Popigai impact event and its relation to events at the Eocene/Oligocene boundary.
  79. (1996). The Palaeocene–Eocene benthic foraminiferal extinction and stable isotope anomalies. In
  80. (1984). The role of geographic variables in explaining paleoclimates: results from Cretaceous climate model sensitivity studies.
  81. (1999). The source and fate of massive carbon input during the Latest Paleocene Thermal Maximum.
  82. (1996). The upper Paleocene– lower Eocene stratigraphic record and the Paleocene/Eocene boundary carbon isotope excursion: implications for geochronology. In
  83. (2001). Trends, rhythms, and aberrations in global climate 65 Ma to present.
  84. (1998). Tropical Atlantic seasonal dynamics in the early middle Eocene from stable oxygen and carbon isotope profiles of mollusk shells.
  85. (1991). Unlocking the Ice House: Oligocene–Miocene oxygen isotopes, eustasy, and margin erosion.
  86. (1988). Upper Eocene to Oligocene isotope (87Sr/86Sr, δ18O, δ13C) standard section,
  87. (1982). Warm saline bottom water in the ancient ocean.
  88. (2001). Warm tropical ocean surface and global anoxia during the mid-Cretaceous period.
  89. (2001). Warm tropical sea surface temperatures in the Late Cretaceous and Eocene epochs.
  90. (1999). Was the LPTM a unique event? In

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