Difference between revisions of "Stable oxygen isotopes"
From Linked Earth Wiki
(Page created; definition of oxygen stable isotopes) |
m (Relink to internal pages for 'foraminifera') |
||
(2 intermediate revisions by the same user not shown) | |||
Line 4: | Line 4: | ||
<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 [[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