Stable isotopic study of Oligocene-Miocene sediments from DSDP Site 354, Equatorial Atlantic

doi:10.1016/0377-8398(83)90008-7

Marine Micropaleontology

Volume 8, Issue 2, September 1983, Pages 121-139

https://doi.org/10.1016/0377-8398(83)90008-7 Get rights and content

Abstract

The oxygen- and carbon-isotope compositions of planktic and benthic foraminifera and calcareous nannofossils from Middle Oligocene-Early Miocene Equatorial Atlantic sediments (DSDP Site 354) indicate two important paleoceanographic changes, in the Late Oligocene (foraminiferal Zone P.21) and in the Early Miocene (foraminiferal Zone N.5). The first change, reflected by a δ¹⁸O increase of 1.45‰ inGlobigerina venezuelana, affected only intermediate pelagic and not surface, deep or bottom waters. The second change affected surface and intermediate waters, whereas deep and bottom waters showed only minor fluctuations. In the case of the former the isotope effect of the moderate ice accumulation on the Antarctic continent is amplified in the Equatorial Atlantic by changes in the circulation pattern. The latter paleoceanographic change, reflected by a significant increase in¹⁸O in both planktic and benthic forms (about 1.0‰ and 0.5‰, respectively), may have been caused by ice volume increase and temperature decrease. Both oxygen- and carbon-isotope compositions indicate a marked depth-habitat stratification for planktic foraminifera and calcareous nannofossils. Three different dwelling groups are recognized: shallowGlobigerinoides, Globoquadrina dehiscens, Globorotalia mayeri and nannofossils; intermediateGlobigerina venezuelana; and deepCatapsydrax dissimilis. The comparison of foraminifera and calcareous nannofossils suggests that the isotopic compositions of nannofossils are generally controlled by the same parameters which control the isotopic composition of shallow-dwelling foraminifera, but the former are more enriched in¹⁸O.

References (71)

BenderM.L. et al.
Speculations about the upper Miocene change in abyssal Pacific dissolved bicarbonate C-13
Earth Planet. Sci. Lett.
(1979)
BergerW.H.
Ecologic patterns of living planktonic Foraminifera
Deep-Sea Res.
(1969)
DeuserW.G. et al.
Stable isotope ratios of dissolved inorganic carbon in the Atlantic
Deep Sea Res.
(1969)
DouglasR.G. et al.
Oxygen isotopic evidence for the depth stratification of Tertiary and Cretaceous planktic foraminifera
Mar. Micropaleontol.
(1978)
EmrichK. et al.
Carbon isotope fractionation during the precipitation of calcium carbonate
Earth Planet. Sci. Lett.
(1970)
GoodneyD.E. et al.
Oxygen and carbon isotopes of recent calcareous nannofossils as paleoceanographic indicators
Mar. Micropaleontol.
(1980)
GrahamD.W. et al.
Carbon and oxygen isotopic disequilibria of Recent Deep-Sea benthic foraminifera
Mar. Micropaleontol
(1981)
KroopnickP.
The dissolved O₂-CO₂-¹³C system in the eastern Equatorial Pacific
Deep Sea Res.
(1974)
KroopnickP.
The distribution of carbon-13 in the Atlantic Ocean
Earth Planet. Sci. Lett.
(1980)
KroopnickP. et al.
Total CO₂,¹³C, and dissolved oxygen¹⁸O at GEOSECS II in the North Atlantic
Earth Planet. Sci. Lett.
(1972)

MooreT.C. et al.

Ocean basin and depth variability of oxygen isotopes in Cenozoic benthic foraminifera

Mar. Micropaleontol.

(1981)

SavinS.M. et al.

Miocene benthic foraminiferal isotope records: a synthesis

Mar. Micropaleontol.

(1981)

ShackletonN.J. et al.

Oxygen and carbon isotope studies in recent foraminifera from the southwest Indian Ocean

Mar. Micropaleontol.

(1978)

WilliamsD.F. et al.

Carbon isotopic compositions in Recent planktonic foraminifera of the Indian Ocean

Earth Planet. Sci. Lett.

(1977)

WoodruffF. et al.

Biological fractionation of oxygen and carbon isotopes by recent benthic foraminifera

Mar. Micropaleontol.

(1980)

AndersonT.F. et al.

The stable isotope geochemistry of marinecoccoliths: a preliminary comparison with planktonic foraminifera

J. Foraminiferal Res.

(1975)

Be´A.W.H. et al.

Shell growth and structure of planktonic foraminifera

Science

(1964)

Be´A.W.H. et al.

Distribution and ecology of living planktonic Foraminifera in surface waters in the Atlantic and Indian Oceans

BergerW.H. et al.

Stable isotopes in deep-sea carbonates: Bob Core ERDC-92, West Equatorial Pacific

Oceanol. Acta

(1978)

BiolziM.

The Oligocene/Miocene boundary in the Equatorial Atlantic DSDP Site 354. Results of studies on planktic foraminifera and calcareous nannofossils

Riv. Ital. Paleontol. Stratigr.

(1982)

BlowW.H.

Late middle Eocene to Recent planktonic foraminiferal biostratigraphy

BoersmaA. et al.

Tertiary oxygen and carbon isotope stratigraphy, Site 357 (mid latitude south Atlantic)

BoersmaA. et al.

Oxygen and carbon isotope record through the Oligocene, DSDP Site 366, Equatorial Atlantic

BolliH.M.

Zonation of Cretaceous to Pliocene marine sediments based on planktonic Foraminifera

Boll. Inf. Assoc. Venez. Min. Petrol.

(1966)

BradshawJ.S.

Ecology of Living Planktonic Foraminifera in the North and Euqatorial Pacific Ocean

BroeckerW.S. et al.

Carbonate dissolution on the western flank of the east Pacific Rise

BuchardtB. et al.

Oxygen isotope fractionation and algal symbiosis in benthic foraminifera from the Gulf of Elat, Israel

Bull. Geol. Soc. Den.

(1977)

DevereuxI.

Oxygen isotope paleotemperature measurements on New Zealand Tertiary fossils

N.Z. J. Si.

(1967)

DormanF.H.

Australian Tertiary paleotemperatures

J. Geol.

(1966)

DouglasR.G. et al.

Oxygen and carbon isotope analyses of Cretaceous and Tertiary foraminifera from the central North Pacific

DuplessyJ.C. et al.

Differential isotopic fractionation in benthic foraminifera and paleotemperatures reassessed

Science

(1970)

EmilianiC.

Depth habitats of some species of pelagic foraminifera as indicated by oxygen isotope ratios

Am. J. Sci.

(1954)

EmilianiC.

Pleistocene temperatures

J. Geol.

(1955)

EmilianiC.

Depth habitats of growth stages of pelagic foraminifera

Science

(1971)

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Citation Excerpt :
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Stable isotopic study of Oligocene-Miocene sediments from DSDP Site 354, Equatorial Atlantic

Abstract

Earth Planet. Sci. Lett.

Deep-Sea Res.

Deep Sea Res.

Mar. Micropaleontol.

Earth Planet. Sci. Lett.

Mar. Micropaleontol.

Mar. Micropaleontol

Deep Sea Res.

Earth Planet. Sci. Lett.

Earth Planet. Sci. Lett.

Mar. Micropaleontol.

Mar. Micropaleontol.

Mar. Micropaleontol.

Earth Planet. Sci. Lett.

Mar. Micropaleontol.

The stable isotope geochemistry of marinecoccoliths: a preliminary comparison with planktonic foraminifera

J. Foraminiferal Res.

Shell growth and structure of planktonic foraminifera

Science

Distribution and ecology of living planktonic Foraminifera in surface waters in the Atlantic and Indian Oceans

Stable isotopes in deep-sea carbonates: Bob Core ERDC-92, West Equatorial Pacific

Oceanol. Acta

The Oligocene/Miocene boundary in the Equatorial Atlantic DSDP Site 354. Results of studies on planktic foraminifera and calcareous nannofossils

Riv. Ital. Paleontol. Stratigr.

Late middle Eocene to Recent planktonic foraminiferal biostratigraphy

Tertiary oxygen and carbon isotope stratigraphy, Site 357 (mid latitude south Atlantic)

Oxygen and carbon isotope record through the Oligocene, DSDP Site 366, Equatorial Atlantic

Zonation of Cretaceous to Pliocene marine sediments based on planktonic Foraminifera

Boll. Inf. Assoc. Venez. Min. Petrol.

Ecology of Living Planktonic Foraminifera in the North and Euqatorial Pacific Ocean

Carbonate dissolution on the western flank of the east Pacific Rise

Oxygen isotope fractionation and algal symbiosis in benthic foraminifera from the Gulf of Elat, Israel

Bull. Geol. Soc. Den.

Oxygen isotope paleotemperature measurements on New Zealand Tertiary fossils

N.Z. J. Si.

Australian Tertiary paleotemperatures

J. Geol.

Oxygen and carbon isotope analyses of Cretaceous and Tertiary foraminifera from the central North Pacific

Differential isotopic fractionation in benthic foraminifera and paleotemperatures reassessed

Science

Depth habitats of some species of pelagic foraminifera as indicated by oxygen isotope ratios

Am. J. Sci.

Pleistocene temperatures

J. Geol.

Depth habitats of growth stages of pelagic foraminifera

Science