Term for the Process of the Early Earth's Crust's Changing Mineral Composition
The term you are searching for is differentiation. In Early Earth the Crust was mafic. Remelting cycles created an enrichment in silica and alkali elements, forming basalts and granites.
As it happens on Continental Crust it is commonly referred as Differentiation of the Continental Crust.
Hacker, B.R. et al (2011): &quot;Differentiation of the continental crust by relamination&quot;,
Earth and Planetary Science Letters, Volume 307, Issues 3â€“4, Pages 501-516, ISSN 0012-821X, https://doi.org/10.1016/j.epsl.2011.05.024.