peraluminous


Also found in: Wikipedia.

peraluminous

[‚pər·ə′lü·mə·nəs]
(petrology)
Of igneous rock, having a molecular proportion of aluminum oxide greater than that of sodium oxide and potassium oxide combined.
References in periodicals archive ?
Analysis revealed that these rocks have high K calc-alkaline affinity, whereas high alumina to silica ratio in these rocks infers them to be metaluminous to peraluminous.
1999): Mafic precursors, peraluminous granitoids, and late lamprophyres in the Avila batholith, A model for the generation of Variscan batholiths in Iberia.
Petrogenesis of highly fractionated I-type peraluminous granites: La Pedriza pluton (Spanish Central System).
1983), and b) Miocene peraluminous garnet and two-mica-bearing granites which formed a section along the Baltoro glacier (Debon et al.
Mafic precursors, peraluminous granitoids, and late lamprophyres in the Avila batholith: A model for the generation of Variscan batholiths in Iberia.
Other topics of the 14 papers include translocation of heavy metals in Chinese cabbage, uranium in the water of abandoned mines, recent advances in separating uranium from other heavy metals, and uranium minerals from a Portuguese variscan peraluminous granite.
Within the peraluminous granitic rocks of southern Nova Scotia, uranium concentrations generally increase and thorium concentrations decrease with increasing magmatic differentiation, resulting in abnormally high eU/eTh associated with the most evolved parts of these granitic intrusions.