If the earth passed through a plasma state as part of creation, this would do precisely nothing to explain 'old' radiometric dates, since the isotopic systems would not close until after the system cooled. In order to explain, say, a 4By zircon in terms of accelerated decay, the accelerated decay would have to occur AFTER the mineral formed and cooled below the closure temp.
Would someone mind explaining how a pre-creation plasma state would be in any way relevant to isotopic dating of terrestrial rocks?
Also, the journal name is Geochimica et Cosmochimica Acta, not Geomechanica et Cosmochimica Acta. [Unless there are two journals with such similar names]