Isotope

Isotope

 
A problem to solve for dating of a rock with U-Pb method by using ratios
 
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Isotope discussion
 
Mhsn137
Ollowing radiogenic U-Pb values were determined from a monazite in Puruvesi leucogranite (Kurhila et al. 2011): 206Pb/ 238U= 0.32134; 207Pb/235U= 4.8875; 207Pb/206Pb=0.11031. Determine the ages corresponding to the three isotope ratios.

I want to know how should i solve this with given ratios and there is something related to interpolation from the given tables.