Who uses radiometric dating he is dating a married woman
Once radioactive decay of U and Th started after creation, daughter Pb isotopes were added inside the earth.
Then catastrophic plate tectonics during the Flood stirred the mantle and via partial melting added new rocks to the crust.
These new rocks rapidly accumulated more Pb isotopes due to the concurrent accelerated radioactive decay of U and Th in them during the Flood.
Among them is the presence of non-radiogenic Pb of unknown composition, often referred to as common or initial Pb.Also used as a biological tracer, for example, in studies of photosynthesis. Medical tracer used to locate brain tumours and problems with the lungs, thyroid, liver, spleen, kidney, gall bladder, skeleton, blood pool, bone marrow, salivary and lacrimal glands and heart blood pool and to detect infection. Positron emitters such as carbon-11, nitrogen-13, oxygen-15 and fluorine-18 are produced in a cyclotron and are extremely short lived isotopes.They are used in positron emission tomography (PET) for studying brain physiology and pathology for epilepsy and dementia.Nor can the measured Pb isotope ratios be used to somehow decide what proportions of them are the initial Pb without recourse to unprovable assumptions about the mineral or rock’s history or their interpreted U-Th-Pb ages within an assumed deep time history.Nevertheless, the ultimate foundation of this U-Pb dating methodology is the assumption that the earth formed from the solar nebula.