Oceanographic and climatic implications of the Palaeocene carbon isotope maximum

Author(s): Corfield, Richard M.; Cartlidge, Julie E.
Author Affiliation(s): Primary:
University of Oxford, Department of Earth Sciences, Oxford, United Kingdom
Volume Title: Terra Nova
Source: Terra Nova, 4(4), p.443-454. Publisher: Blackwell, Oxford, United Kingdom. ISSN: 0954-4879
Note: In English. 55 refs.; illus., incl. 2 tables, sects.
Summary: We have compared detailed planktonic and benthonic foraminiferal carbon and oxygen isotope records from the Palaeocene and early Eocene successions at DSDP Site 577 (Shatsky Rise, North Pacific), a composite section derived from DSDP Leg 74 sites (Walvis Ridge, South Atlantic) and a composite section from ODP Leg 113 sites (Maud Rise, Weddell Sea). The δ13C records of Palaeocene and early Eocene Foraminifera at Site 577 and the Leg 74 sites show that an increase in δ13C values in surface waters at 64 Ma (end of Zone P1) resulted in increased vertical carbon isotope gradients between surface and deeper dwelling planktonic foraminifera, and between surface-dwelling planktonics and benthonic foraminifera which became progressively steeper until the middle late Palaeocene. This steepening also occurs in the latest Palaeocene of the composite Leg 113 section and can be explained by an increase in surface ocean productivity. This increase in productivity probably resulted in an expansion of the oxygen minimum zone. (mod. journ. abst.)
Year of Publication: 1992
Research Program: DSDP Deep Sea Drilling Project
IPOD International Phase of Ocean Drilling
ODP Ocean Drilling Program
Key Words: 12 Stratigraphy, Historical Geology and Paleoecology; Atlantic Ocean; Biostratigraphy; C-13/C-12; Carbon; Cenozoic; DSDP Site 525; DSDP Site 527; DSDP Site 577; Deep Sea Drilling Project; Foraminifera; IPOD; Invertebrata; Isotope ratios; Isotopes; Leg 113; Leg 74; Leg 86; Marine geology; Maud Rise; Microfossils; North Pacific; Northwest Pacific; ODP Site 689; ODP Site 690; Ocean Drilling Program; Pacific Ocean; Paleo-oceanography; Paleocene; Paleoclimatology; Paleogene; Protista; Shatsky Rise; South Atlantic; Southeast Atlantic; Southern Ocean; Stable isotopes; Tertiary; Walvis Ridge; Weddell Sea; West Pacific
Coordinates: N322628 N322632 E1574324 E1574323
S290415 S280229 E0025908 E0014547
S650938 S643100 E0030600 E0011218
Record ID: 2007070704
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