The radiometric dating of an igneous rock provides
ne of the main objections to radiometric dating (on the part of young earth creationists) is that radiometric ages do not agree with each other or that contamination renders ages meaningless. Early mass spectrometers were not as sensitive as machines today and the methods for separating, cleaning and analysis were less sophisticated.
Although ye-creationists like Snelling talk about contamination of isotopic systems as if it were a foreign concept to modern geology, most geochronologists routinely check for possible contamination using a variety of methods.
In addition to variable half-lives, each mineral will 'close' at different temperatures (closure, is simply defined as the point where no daughter/parent is lost or gained*).
There are a number of different methods that geologists use to check for loss/gain and these are incorporated into most analyses (isochron methods, stepwise degassing etc).
Also, most Precambrian successions have been metamorphosed, rendering original minerals and textures difficult to interpret, and resetting diagenetic minerals.Quite community who would value your experience and very reassuring the radiometric dating of an igneous rock provides to go igneous rocks dating to local.