Although it is not abundant in igneous rocks, it is sufficiently common to be used for the purposes of radiometric dating.
It has two properties which make it useful for this purpose.
This paper reviews the research into the methodology of lead isotope provenance studies carried out at the University of Oxford between 19, at first in the Department of Geology (Geological Age and Isotope Research Laboratory), later in the Isotrace Laboratory based in the Department of Nuclear Physics, and eventually part of the Research Laboratory of Archaeology and the History of Art.
These 27 years of intensive work, funded initially by the Stiftung Volkswagenwerk, and later from numerous UK Government and Charitable funds and finally by the Institute of Aegean Prehistory laid the foundations of the lead isotope provenance methodology and resulted in a large database of analytical isotope and elemental results.
Now lead and uranium are particularly susceptible to such shuffling in the event of even mild metamorphism.