Definition of peralkaline in English:

Share this entry


Pronunciation: /pəˈralkəlʌɪn/

Entry from British & World English dictionary


(Of an igneous rock) containing a higher proportion (taken together) of sodium and potassium than of aluminium.
Example sentences
  • During the mid-1980s to early 1990s more research took place that involved detailed petrographical and geochemical studies on the syenites, alkaline, and peralkaline rocks.
  • This suggests that the peralkaline volcanic magma was derived from a lithospheric mantle source that had not been previously depleted in incompatible elements.
  • Continental rifting started in the Early Cambrian with intrusion of crust-derived metaluminous to slightly peraluminous A-type granites, and culminated in the Mid-Cambrian with eruption of peralkaline rhyolites.
Share this entry

What do you find interesting about this word or phrase?

Comments that don't adhere to our Community Guidelines may be moderated or removed.