Empirical equations for the temperature dependence of calcite-water oxygen isotope fractionation from 10 to 70°C

2010 ◽  
Vol 24 (24) ◽  
pp. 3521-3526 ◽  
Author(s):  
Attila Demény ◽  
Sándor Kele ◽  
Zoltán Siklósy
Keyword(s):  
Temperature Dependence ◽  
Oxygen Isotope ◽  
Isotope Fractionation ◽  
Empirical Equations ◽  
Oxygen Isotope Fractionation ◽  
Water Oxygen

scholarly journals Experimental determination of the temperature dependence of oxygen-isotope fractionation between water and chitinous head capsules of chironomid larvae

2021 ◽  
Author(s):  
Alex Lombino ◽  
Tim Atkinson ◽  
Stephen J. Brooks ◽  
Darren R. Gröcke ◽  
Jonathan Holmes ◽  
...  
Keyword(s):  
Temperature Dependence ◽  
Oxygen Isotope ◽  
Oxygen Isotopes ◽  
Isotope Fractionation ◽  
Temperature Dependent ◽  
Oxygen Isotope Fractionation ◽  
Chironomid Larvae ◽  
Increasing Temperature ◽  
The Relationship

AbstractOxygen-isotope values of invertebrate cuticle preserved in lake sediments have been used in palaeoenvironmental reconstructions, generally with the assumption that fractionation of oxygen isotopes between cuticle and water ($$\upalpha_{\text{cuticle}-\text{H}_{2}\text{O}}$$ α cuticle - H 2 O ) is independent of temperature. We cultured chironomid larvae in the laboratory with labelled oxygen-isotope water and across a range of closely controlled temperatures from 5 to 25 °C in order to test the hypothesis that fractionation of oxygen isotopes between chironomid head capsules and water ($$\upalpha_{\text{chironomid}-\text{H}_{2}\text{O}}$$ α chironomid - H 2 O ) is independent of temperature. Results indicate that the hypothesis can be rejected, and that $$\upalpha_{\text{chironomid}-\text{H}_{2}\text{O}}$$ α chironomid - H 2 O decreases with increasing temperature. The scatter in the data suggests that further experiments are needed to verify the relationship. However, these results indicate that temperature-dependence of $$\upalpha_{\text{chironomid}-\text{H}_{2}\text{O}}$$ α chironomid - H 2 O should be considered when chironomid δ18O is used as a paleoenvironmental proxy, especially in cases where data from chironomids are combined with oxygen-isotope values from other materials for which fractionation is temperature dependent, such as calcite, in order to derive reconstructions of past water temperature.

Calibration of the phosphate δ18O thermometer with carbonate–water oxygen isotope fractionation equations

2013 ◽  
Vol 347 ◽  
pp. 217-226 ◽  
Author(s):  
Christophe Lécuyer ◽  
Romain Amiot ◽  
Alexandra Touzeau ◽  
Julie Trotter
Keyword(s):  
Oxygen Isotope ◽  
Isotope Fractionation ◽  
Carbonate Water ◽  
Oxygen Isotope Fractionation ◽  
Water Oxygen
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