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Oxygen foraminiferal

Fig. 18-1 Benthic foraminiferal oxygen isotope record from 3477 m water depth in the eastern tropical Pacific ocean from Ocean Drilling Program site 677 (Shackleton et al, 1990). ratios are expressed in the S... Fig. 18-1 Benthic foraminiferal oxygen isotope record from 3477 m water depth in the eastern tropical Pacific ocean from Ocean Drilling Program site 677 (Shackleton et al, 1990). ratios are expressed in the S...
Spero HJ, Bijma J, Lea DW, Bemis BE (1997) Effect of seawater carbonate concentration on foraminiferal carbon and oxygen isotopes. Nature 390 497-500 Spivack AJ, Edmond JM (1986) Determination of boron isotope ratios by thermal ionization mass spectrometry of the dicesium metaborate cation. Anal Chem 58 31-35 Spivack AJ, Edmond JM (1987) Boron isotope exchange between seawater and the oceanic crust. Geochim Cosmochim Acta 51 1033-1043... [Pg.272]

Zachos J, Pagani M, Sloan L, Thomas E, BiUups K (2001) Trends, rhythms and aberrations in global climate 65 Ma to present. Science 292 686-693 Zeebe RE (1999) An explanation of the effect of seawater carbonate concentration on foraminiferal oxygen isotopes. Geochim Cosmochim Acta 63 2001-2007 Zeebe RE (2005) Stable boron isotope fractionation between dissolved B(OH)3 and BlOH). Geochim Cosmochim Acta 69 2753-2766... [Pg.279]

There has been a long discussion in the literature as to the extent to which foraminifera shells are in oxygen-isotopic equilibrium. The precise state of equilibrium cannot be defined with sufficient precision from theory, so the general practice is to compare observed foraminiferal calibrations to inorganic experiments... [Pg.3216]

Niimberg D., Muller A., and Schneider R. R. (2000) Paleo-sea surface temperature calculations in the equatorial east Atlantic from Mg/Ca ratios in planktic foraminifera a comparison to sea surface temperature estimates from 31, oxygen isotopes, and foraminiferal transfer function. Paleoceanography 15(1), 124—134. [Pg.3235]

Spero H. J., Bijma J., Lea D. W., and Bemis B. (1997) Effect of seawater carbonate chemistry on planktonic foraminiferal carbon and oxygen isotope values. Nature 390, 497-500. [Pg.3236]

Figure 12 Alkenone data acquired with planktonic foraminiferal can be used to remove the temperature effect from oxygen isotopic signals in order to assess global (ice volume) and regional (evaporation/precipitation balance) contributions to isotopic change. Data come from an equatorial Atlantic core studied by Schneider et al. (1996) the isotopic deconvolution was made by the present author. Note that the structure and amplitude of the temperature-corrected planktonic record are consistent with current thinking on the global ice volume signal for the late... Figure 12 Alkenone data acquired with planktonic foraminiferal can be used to remove the temperature effect from oxygen isotopic signals in order to assess global (ice volume) and regional (evaporation/precipitation balance) contributions to isotopic change. Data come from an equatorial Atlantic core studied by Schneider et al. (1996) the isotopic deconvolution was made by the present author. Note that the structure and amplitude of the temperature-corrected planktonic record are consistent with current thinking on the global ice volume signal for the late...
Coupling Benthic Foraminiferal Mg/Ca and Oxygen Isotope Records... [Pg.3395]

Figure 7 The marine osmium isotope record of the Eocene-Oligocene transition (Ravizza and Peucker-Ehrenhrink, 2003). The henthic foraminiferal oxygen isotope record from site 522 (Zachos et al., 1996) and a fit to the marine strontium isotope record are shown for comparison. Note that the rise of ice house conditions in the Early Ohgocene is closely associated with an abrupt and permanent increase in seawater Os/ Os. This provides evidence supporting the hypothesis that glaciation contributes to rising seawater Os/i Os and Sr/ Sr ratios ((3IZ2.)95% C. L. from McArthur et al, 2001). Figure 7 The marine osmium isotope record of the Eocene-Oligocene transition (Ravizza and Peucker-Ehrenhrink, 2003). The henthic foraminiferal oxygen isotope record from site 522 (Zachos et al., 1996) and a fit to the marine strontium isotope record are shown for comparison. Note that the rise of ice house conditions in the Early Ohgocene is closely associated with an abrupt and permanent increase in seawater Os/ Os. This provides evidence supporting the hypothesis that glaciation contributes to rising seawater Os/i Os and Sr/ Sr ratios ((3IZ2.)95% C. L. from McArthur et al, 2001).
The Mg/Ca and of benthic foraminifers are both influenced by the temperature of calcification. This link is the reason that a discussion of Mg/Ca is included in this review. As outlined above, the oxygen isotope composition of biogenic calcite is a function of the temperature and the oxygen isotope composition of the water in which the organism calcified. For benthic foraminiferal records it is widely assumed that mainly the ice volume changes drive the temporal variations in the of... [Pg.3412]

There are a number of advantages of foraminiferal Mg/Ca thermometry over other palaeotem-perature proxies (Barker et al. 2005). Firstly, as discussed above, foraminiferal 8 0 is additionally controlled by the oxygen isotope composition of... [Pg.12]

Zeebe, R. E. 1999. An explanation of the effect of seawater carbonate concentration on foraminiferal oxygen isotopes. Geochimica et Cosmochimica Acta, 63, 2001-2007. [Pg.57]

See other pages where Oxygen foraminiferal is mentioned: [Pg.431]    [Pg.215]    [Pg.56]    [Pg.1523]    [Pg.3217]    [Pg.3217]    [Pg.3223]    [Pg.3287]    [Pg.3289]    [Pg.3340]    [Pg.3396]    [Pg.3416]    [Pg.340]    [Pg.235]    [Pg.282]    [Pg.357]    [Pg.1]    [Pg.2]    [Pg.9]    [Pg.45]    [Pg.55]    [Pg.79]    [Pg.104]    [Pg.111]    [Pg.114]    [Pg.121]    [Pg.122]    [Pg.123]    [Pg.127]    [Pg.135]    [Pg.136]    [Pg.137]   
See also in sourсe #XX -- [ Pg.116 , Pg.415 , Pg.416 , Pg.417 ]



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