Khelifi, Nabil et al. (2012): Late Pliocene age control and composite depths at ODP Site 982, revisited

Leg/Site/Hole:
ODP 162
ODP 162 982
Identifier:
2013-010061
georefid

Creator:
Khelifi, Nabil
University of Kiel, Institute of Geosciences, Kiel, Germany
author

Sarnthein, Michael
Alfred Wegener Institute for Polar and Marine Research, Germany
author

Naafs, Bernhard David Adriaan
author

Identification:
Late Pliocene age control and composite depths at ODP Site 982, revisited
2012
Climate of the Past
Copernicus, Katlenburg-Lindau, International
8
1
79-87
Ocean Drilling Program (ODP) Site 982 provided a key sediment section at Rockall Plateau for reconstructing northeast Atlantic paleoceanography and monitoring benthic delta (super 18) O stratigraphy over the late Pliocene to Quaternary onset of major Northern Hemisphere glaciation. A renewed hole-specific inspection of magnetostratigraphic reversals and the addition of epibenthic delta (super 18) O records for short Pliocene sections in holes 982A, B, and C, crossing core breaks in the delta (super 18) O record published for Hole 982B, now imply a major revision of composite core depths. After tuning to the orbitally tuned reference record LR04, the new composite delta (super 18) O record results in a hiatus, where the Kaena magnetic subchron might have been lost, and in a significant age reduction for all proxy records by 130 to 20 ky over the time span 3.2-2.7 million years ago (Ma). Our study demonstrates the general significance of reliable composite-depth scales and delta (super 18) O stratigraphies in ODP sediment records for generating ocean-wide correlations in paleoceanography. The new concept of age control makes the late Pliocene trends in SST (sea surface temperature) and atmospheric pCO (sub 2) at Site 982 more consistent with various paleoclimate trends published from elsewhere in the North Atlantic.
English
Coverage:Geographic coordinates:
North:57.3100
West:-15.5200East: -15.5200
South:57.3100

Stratigraphy; algae; Anomalinidae; Atlantic Ocean; atmospheric transport; benthic environment; carbon dioxide; Cassidulinacea; Cenozoic; Cibicidoides; Cibicidoides mundulus; Cibicidoides wuellerstorfi; Coccolithophoraceae; Emiliania; Emiliania huxleyi; Foraminifera; glaciation; Invertebrata; isotope ratios; isotopes; Leg 162; magnetostratigraphy; microfossils; Neogene; North Atlantic; Northern Hemisphere; O-18/O-16; Ocean Drilling Program; ODP Site 982; oxygen; paleo-oceanography; paleoclimatology; paleomagnetism; paleotemperature; Plantae; Pliocene; Protista; Quaternary; reversals; Rockall Bank; Rotaliina; sea-surface temperature; stable isotopes; Tertiary; transport; upper Pliocene;

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