Definition of Peralkaline. Meaning of Peralkaline. Synonyms of Peralkaline

- Peralkaline rocks include those igneous rocks which have a deficiency of aluminium such that sodium and pot****ium are in excess of that needed for feldspar...
- Volcanic rocks are also broadly divided into subalkaline, alkaline, and peralkaline volcanic rocks. Subalkaline rocks are defined as rocks in which SiO2...
- and sedimentary rock. Adakite – Volcanic rock type Agpaitic rock – Peralkaline igneous rock Andesite – Type of volcanic rock Alkali feldspar granite –...
- and lithophysal structures. Some rhyolite is highly vesicular pumice. Peralkaline rhyolites (rhyolites unusually rich in alkali metals) include comendite...
- syenogranite to alkali feldspar granite. The volcanic rocks are alkaline to peralkaline, and they are represented by subaerial flows and eruptions and subvolcanic...
- 230,000 tonnes. The island is the type locality for pantellerite, a peralkaline rhyolite. Pantelleria has a subtropical Mediterranean climate (Köppen:...
- Pantellerite is a type of volcanic rock, specifically a peralkaline rhyolite. It has a higher iron and lower aluminium composition than comendite. It...
- the alkali oxides as feldspar (Al2O3 < K2O + Na2O) are described as peralkaline, and they contain unusual sodium amphiboles such as riebeckite. Granites...
- Rare-earth minerals are usually found in ****ociation with alkaline to peralkaline igneous magmas in pegmatites or with carbonatite intrusives. Perovskite...
- sodium oxide, pot****ium oxide and calcium oxide. This contrasts with peralkaline in which the alkalis are higher, metaluminous where aluminium oxide concentration...