Tedford, R. A. and Kelly, D. C. (2004): A deep-sea record of the late Miocene carbon shift from the southern Tasman Sea

Leg/Site/Hole:
ODP 189
ODP 189 1172
Identifier:
2005-035035
georefid
Creator:
Tedford, R. A.
University of Wisconsin at Madison, Department of Geology and Geophysics, Madison, WI, United States
author
Kelly, D. C.
University of California at Santa Barbara, United States
author
Identification:
A deep-sea record of the late Miocene carbon shift from the southern Tasman Sea
2004
In: Exon, Neville F. (editor), Kennett, James P. (editor), Malone, Mitchell (editor), The Cenozoic Southern Ocean; tectonics, sedimentation, and climate change between Australia and Antarctica
American Geophysical Union, Washington, DC, United States
151
273-290
Changes in carbonate sedimentation and planktonic foraminiferal preservation during the late Miocene carbon shift (LMCS) are assessed using a relatively complete upper Miocene to lowe Pliocene section recovered from Ocean Drilling Program (ODP) Site 1172 in the southern Tasman Sea. Parallel stable isotope records were generated using size-specific, depth-stratified planktonic and benthic foraminifera. All three of the foraminiferal delta (super 13) C stratigraphies record the isotopic decrease that marks the LMCS. The onset of the LMCS coincides with upper magnetochron C2n.2n within planktonic foraminiferal zone SN10. Pulses of carbonate dissolution punctuate the LMCS at other subantarctic sites, indicating that the dissolution spike at Site 1172 reflects a regional change to Southern Ocean circulation/chemistry. The LMCS marks when deepsea delta (super 13) C records of more modern aspect first appeared in the geologic record, and may signify a new steady state in ocean carbonate chemistry. (mod. journ. abst.)
English
Serial
Coverage:Geographic coordinates:
North:-43.5700
West:149.5500East: 149.5600
South:-43.5800
Stratigraphy; algae; Anomalinidae; Antarctic ice sheet; Antarctica; benthic taxa; biostratigraphy; C-13/C-12; carbon; carbon dioxide; carbonate sediments; Cassidulinacea; Cenozoic; Cibicidoides; Cibicidoides wuellerstorfi; currents; deep-sea environment; East Tasman Plateau; eustacy; Foraminifera; geochemistry; Globigerina; Globigerina bulloides; Globigerinacea; Globigerinidae; Globoconella; Globoconella conoidea; Globoconella conomiozea; Globoconella pliozea; Globoconella punticulata; Globoconella sphericomiozea; Invertebrata; isotope ratios; isotopes; Leg 189; magnetostratigraphy; marine environment; microfossils; Miocene; nannofossils; Neogene; Neogloboquadrina; Neogloboquadrina continuosa; Neogloboquadrina pachyderma; nutrients; O-18/O-16; ocean circulation; ocean currents; Ocean Drilling Program; ODP Site 1172; Orbulina; Orbulina suturalis; oxygen; Pacific Ocean; paleo-oceanography; paleoecology; Plantae; Protista; Rotaliina; sea-level changes; sediments; South Pacific; Southern Ocean; Southwest Pacific; stable isotopes; Tasman Sea; Tertiary; upper Miocene; West Pacific;
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