New theory on the origin of the Earth crust and granites

Danilo Anton
According to the theory of Vicente Sanchez Cala, there are no fundamental compositional changes in the rocks deep into the crust and the mantle.
He assumes that composition of mantle materials are denser, but with similar chemical formulas.
Therefore  higher density mantle silicates become lower density silicates. Coesite (density: 2.92), and stishovite, (density 4.35) change in phase transforming into quartz, K-Na Hollandite: (K,Na) AlSi₃O₈, (density: 4.5), silicated perovskite (Mg,Fe) SiO3 and CaSiO3, (density 4).and post-perovskita MgSiO₃; pPv,.(density 4) become Ca and Na feldspahts, amphibols, pyroxenes and biotites, and so on..
The crust is therefore a modification of the mantle changing mainly the crystalline structure and density but NOT the chemical composition.
Densialites become granites. Densialiteses are the rocks of the mantle and granites are the rocks of the crust, 
Moreover, we can say that the granitic external layer of the Earth is what we call crust.