Of all the isotopic dating methods in use today the uraniumlead method is the oldest and when done carefully the most reliable unlike any other method uraniumlead has a natural crosscheck built into it that shows when nature has tampered with the evidence.
But at the time no one knew about isotopes once isotopes were explicated during the 1910s it became clear that radiometric dating methods were not ready for prime time with the discovery of isotopes the dating problem went back to square one.
In dating absolute dating the field of isotope geology complements geochronology workers in isotope geology follow the migration of isotopes produced by.
Leadlead isotope geochemistry lead has four stable isotopes 204 pb 206 pb 207 pb 208 pb and one common radioactive isotope 202 pb with a halflife of 53000 years lead is created in the earth via decay of transuranic elements primarily uranium and thorium lead isotope geochemistry is useful for providing isotopic dates on a variety of materials.
Common lead contains a mixture of four isotopes lead 204 which is not produced by radioactive decay provides a measure of what was original lead it is observed that for most minerals the proportions of the lead isotopes is very nearly constant so the lead204 can be used to project the original quantities of lead206 and lead207.
Download citation on researchgate principles of isotope geology discussions of methods of isotope dating using rbsr kar sup 40arsup 39ar reos luhf k.
Radiogenic isotopes and their applications within a range of scientific laboratory for isotope geology box 50 007 se104 05 stockholm sweden lead isotopes.