[
US
/ˈpaɪɹɑkˌsin, paɪˈɹɑksin/
]
NOUN
- any of a group of crystalline silicate mineral common in igneous and metamorphic rocks
How To Use pyroxene In A Sentence
- Other variants include feldspar-pyroxene-phyric lava and, rarely, aphyric lava.
- The magmatic evolution is dominated by low-pressure crystal fractionation of olivine, Cr-spinel, plagioclase and clinopyroxene.
- In addition to quartz, fluid inclusions can occur in carbonates, gypsum, halite, fluorite, feldspar, garnet, pyroxene, amphibole, tourmaline, olivine, and sphalerite; indeed in most minerals except phyllosilicates.
- Geochemically, the pyroxene nephelinite is highly enriched in LILE compared with the first one.
- Biotite, epidote and clinopyroxene are also occasionally present, whereas garnet is virtually absent.
- The majority of the rhyolites are porphyritic and contain phenocrysts of one or more of the following: plagioclase, clinopyroxene, magnetite, quartz and sanidine, plus accessory apatite and zircon.
- Pyroxene is exclusively diopsidic augite, with a composition relatively colse to the diopside - hedenbergite join.
- The majority of the rhyolites are porphyritic and contain phenocrysts of one or more of the following: plagioclase, clinopyroxene, magnetite, quartz and sanidine, plus accessory apatite and zircon.
- Several igneous dikes and sills have been intruded into this sedimentary sequence, the largest of which is the Great Whin Sill, a quartz-orthopyroxene dolerite of late Carboniferous age.
- Pyroxene, quartz and augite form the groundmass, as seen in section. The Long Labrador Trail