Difference between revisions of "Stable oxygen isotopes"
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<div style="text-align: center;"> <math> \delta^{18}O_{SMOW} = 1.03091 (\delta^{18}O_{PDB}) +30.91 </math> </div> | <div style="text-align: center;"> <math> \delta^{18}O_{SMOW} = 1.03091 (\delta^{18}O_{PDB}) +30.91 </math> </div> | ||
− | + | δ<sup>18</sup>O may be measured on: | |
− | *the [[stable oxygen isotopes in foraminifera | shells]] of [ | + | *the [[stable oxygen isotopes in foraminifera | shells]] of [[Foraminifera | foraminifera]] |
Latest revision as of 17:29, 15 January 2016
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