Difference between revisions of "D18O"
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( StableOxygenIsotope )
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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%). | 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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δ<sup>18</sup>O may be measured on: | δ<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]] | ||
| + | *Ice cores | ||
| + | * 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:
δ18O may be measured on:
- the shells of foraminifera
- Ice cores
- Speleothems...
