[Creationist]

http://www.ga.gov.au/pdf/Corp0083.pdf

So if Pb were incorporated into zircons, how could it be incorporated in such a way as to give a consistent radiogenic age for both isotopes, and without affecting the amount of the other two isotopes?<BR><BR>I do not know enough about the subject but this site seems to believe there could be a problem. Appears that leaching can have an effect.

HUM.

http://www.tcd.ie/Geology/MAIN-PAGE/VAMP/pdfs/Posters_pdf/Gould_etal_2004_VMSG_IGRM_Poster.pdf

And it appears to be formed from what, oh magma.

http://www.freerepublic.com/focus/f-news/1616059/posts?page=106#106

[Right Wing Professor]

If Pb were incorporated into zircons, how could it be incorporated in such a way as to give a consistent radiogenic age for both isotopes, and without affecting the amount of the other two isotopes?

I do not know enough about the subject but this site seems to believe there could be a problem. Appears that leaching can have an effect.

So you admit you're posting material you don't understand, in the hope that the site you're quoting know more about it than you do.

Let me assure you they don't. They don't address the issue of the fact that radiogenic (U,Th)/Pb ages use two and sometimes three independent pairs of nuclides, which give mutually consistent ages; and they state falsely that the data could be compromised by non-radiogenic lead, which in fact is corrected for.