In order to find (206Pb/204Pb)initial and apply age calculation for the Whole-rock Pb isotope. How to calculate 238U/204Pb and 235U/204Pb?

Since we have only U, Th, and Pb conc. measured in ppms by ICP MS and only 206/204, 207/204, and 208/204 Pb (whole-rock) isotope ratios in my MC ICP MS. I am unable to think how I can calculate...

15 January 2025 3,678 1 View