Difference between revisions of "D18O"

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( StableOxygenIsotope )
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=== d18O ===
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=== &delta;<sup>18</sup>O ===
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Oxygen has three naturally-occuring stable [[:Category:Isotope | isotopes]]: <sup>16</sup>O, <sup>17</sup>O, <sup>18</sup>O, with <sup>16</sup>O being the most abundant (99.762%).
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Two international reference [[standard | 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., [[Marine sediment | oceanic]], [[Lake sediment | lacustrine ]]). The conversion between SMOW and PDB scales is given by:
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<div style="text-align: center;"> <math> \delta^{18}O_{SMOW} = 1.03091 (\delta^{18}O_{PDB}) +30.91 </math> </div>
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&delta;<sup>18</sup>O may be measured on:
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*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: