Abstract: Through 37 petrogenetic experiments the authors came to the following conclusions: （1） quartz dioritic or more basic magma cannot be produced by anataxis of crustal materials at crustal temperatures;（2） quartz dioritic and granodioritic magmas can result from assimilation of granitic crust by alkali basaltic magma. The resulting magma is high potassium and alkali rich, and the rocks belong to high potassium rock series,being similar to intrusive rocks of the Tongling area;（3）the magma generated at high pressures is richer in potassium and alkalis than that generated at medium pressures;（4）in the process of magmatic evolution ,there seems no genetic relation between Cu and K,and the “correlativity"of both is related to their convergence,i.e.they both concentrate in the late magmatic stage.