- 1、ProterozoicbasalticmagmaintrusioneventintheAltai,Xinjiang2、Thealkalicbasalticmagmaofthisstagemaybederivedfromasthenosphere.3、Scientistshavelongbelievedthatdacitecanseparatefrombasalticmagmatoformgraniticrocks.Butthey'dnever.4、Theyareformedfrom...
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