Stable & Radiogenic Isotopes in Igneous Petrology- Geochronology & Isotope Tracers- #8 | GEO GIRL

Ever wonder how we use isotopes in geology? Ever wonder about the difference between stable and radiogenic isotopes? Here, I discuss stable isotope fractionation as well as stable isotope applications in igneous petrology (for temperature reconstructions and as isotopes tracers), then we switch to radiogenic isotopes, in which I go over the applications of potassium argon dating, argon argon dating, and uranium lead dating for geochronology, then I briefly cover some other dating methods as well as the fan favorite, carbon dating, and why C dating is not applicable to igneous petrology. Lastly, we touch on isotope petrogenesis, the study of magma sources, and the common isotope pairs we use for this (strontium, hafnium, neodymium, and lead), with an example of how we use Sr isotopes to determine magma source and then how the application of Hf isotopes and Nd isotopes differ to that of Sr isotopes.

References: Essentials of Igneous Petrology by Ronald and Carol Frost: https://amzn.to/37Zs9AL
Earth Materials by Cornelis Klein and Anthony Philpotts: https://amzn.to/3z5sCxe

GEO GIRL Website: https://www.geogirlscience.com/ (visit my website to see all my courses, shop merch, learn more about me, and donate to support the channel if you'd like!)

0:00 isotope introduction
2:16 stable vs radioactive isotopes
3:57 stable isotope fractionation
5:57 kinetic vs equilibrium isotope fractionation
8:52 geothermometry & isotope tracers
11:00 radiogenic isotope geochemistry
13:12 K-Ar dating
14:21 Ar-Ar dating
15:42 U-Pb dating
17:35 Other U dating methods
19:39 carbon dating
20:46 what is isotope petrogenesis?
22:38 Sr isotopes to determine magma sources
24:12 Hf & Nd isotopes to determine magma sources
25:18 Upcoming videos!

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Non-textbook books I recommend:
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