Your post is really just gibberish. Where on earth do you get this ridiculous stuff?
Helium is, in fact, produced in radioactive decay; in alpha decay the emitted particle is a nucleus of helium. Granite is notorious for containing radioactive elements that undergo alpha decay.
When some minerals, including zircons, are formed, the chemistry of the process excludes some elements and includes others. In some useful cases, the parent in a decay is included but the progeny is not; thus any progeny found later are due to decay since the mineral formed.
Regards,
your neighbourhood radiochemist
Edited by Woodsy, : minor pedanticism
Edited by Woodsy, : title changed