(of an igneous rock) containing a higher proportion of aluminium than of sodium and potassium (taken together).
〔地质〕（火成岩）过铝质的
Example sentencesExamples
In keeping with their amphibole content, almost all the samples are metaluminous to slightly peraluminous.
The migmatites are spatially and temporally related to poorly exposed peraluminous intrusions such as the Strichen granite.
A poorly exposed but geochemically distinct suite of peraluminous granites occurs in the Buchan terrain.
Although biotite is capable of this, other minerals such as muscovite, garnet and cordierite are more efficient and preferentially occur in strongly peraluminous rocks.
Future work on the beryl occurrences that are not associated with peraluminous granites might help shed light on beryl genesis.