Difference between revisions of "D18O"

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( StableOxygenIsotope )
(changed notation to delta)
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&delta;<sup>18</sup>O may be measured on:
 
&delta;<sup>18</sup>O may be measured on:
 
*the [[stable oxygen isotopes in foraminifera | shells]] of [[:Category:Foraminifera | foraminifera]]
 
*the [[stable oxygen isotopes in foraminifera | shells]] of [[:Category:Foraminifera | foraminifera]]
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*Ice cores
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* Speleothems...
  
 
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[[Category:StableOxygenIsotope]]
 
[[Category:StableOxygenIsotope]]

Latest revision as of 18:03, 12 June 2017

δ18O

Oxygen has three naturally-occuring stable isotopes: 16O, 17O, 18O, with 16O being the most abundant (99.762%).

Two international reference standards are used to report variations in oxygen isotope standards: PDB and SMOW. The use of the PDB standard in reporting oxygen isotope composition is restricted to carbonates of low-temperature origins (e.g., oceanic, lacustrine ). The conversion between SMOW and PDB scales is given by:

 \delta^{18}O_{SMOW} = 1.03091 (\delta^{18}O_{PDB}) +30.91

δ18O may be measured on: