Very helpful; I was reading this from Alan P. Dickin and was not getting anywhere, possibly because I am not from a Geology background and that book is jargon-heavy. Thanks a lot for making this so simple.
Thanks, William, with the U-Pb decay @ around 17min 50sec, you were commenting about discordia and the common loss of lead. Where is this lead going to ? decaying to something else or ...... (if you said where, sorry I missed it and couldnt find a reference?) regards, Dave
Hi Dave - the loss of radiogenic lead is most often ascribed to alteration processes (e.g. interaction with metamorphic, meteoric, or deuteric fluids). The leaching of radiogenic lead is of course problematic as its effects U/Pb values resulting in discordia (I.e. the proportion of U to Pb doesn't honour well defined decay constants!). However, zircon is pretty resistant for the most part... which is why geochronologists prefer it to other geochronometers.
Very helpful; I was reading this from Alan P. Dickin and was not getting anywhere, possibly because I am not from a Geology background and that book is jargon-heavy. Thanks a lot for making this so simple.
Good lessons, thank you for your best explanation.
Thank you! I looked specifically at interpreting the Concordia diagram (U-Pb) and the animations really helped it click for me! :D😀
Really well explained!! thanks so muuuuuch!
Thanks, William, with the U-Pb decay @ around 17min 50sec, you were commenting about discordia and the common loss of lead. Where is this lead going to ? decaying to something else or ...... (if you said where, sorry I missed it and couldnt find a reference?) regards, Dave
Hi Dave - the loss of radiogenic lead is most often ascribed to alteration processes (e.g. interaction with metamorphic, meteoric, or deuteric fluids). The leaching of radiogenic lead is of course problematic as its effects U/Pb values resulting in discordia (I.e. the proportion of U to Pb doesn't honour well defined decay constants!). However, zircon is pretty resistant for the most part... which is why geochronologists prefer it to other geochronometers.
thank you very helpful.
Thnx a lot 🙌✨ was very helpful 🐈🤍
Thank you!
5:44 zircons
6:45 concordia diagram