| 释义 |
Definition of plagioclase in English: plagioclase(also plagioclase feldspar) noun ˈplaɡɪəʊkleɪzˈpleɪdʒɪə(ʊ)kleɪzˈplājēəˌklās mass nounA form of feldspar consisting of aluminosilicates of sodium and/or calcium, common in igneous rocks and typically white. Example sentencesExamples - Like P133, it consists mainly of quartz, feldspar and white mica; plagioclase can also be distinguished under the microscope.
- The metabasites typically contain coarse-grained hornblende, biotite and plagioclase with accessory titanite.
- This granulite consists of garnet, biotite, muscovite, quartz, plagioclase and cordierite.
- It is a reddish brown sandstone formed by detrital quartz, plagioclase, feldspar and muscovite, with subordinate apatite, zircon and opaque minerals.
- The Bakfjord Granite contains quartz, K-feldspar, biotite, plagioclase, epidote, allanite, muscovite and occasional garnet.
- Strain shadows around feldspar porphyroclasts contain recrystallized potassium feldspar, plagioclase and quartz.
- The sample is strongly foliated and consists of garnet, biotite, quartz, plagioclase and cordierite.
- The semi-pelites usually consist of biotite, quartz, plagioclase and untwinncd feldspar, and garnet forms abundant porphyroblasts in some varieties.
- The main constituent phases of these rocks are plagioclase, hornblende, pyroxene, quartz and K-feldspar, and accessory phases include magnetite, sphene, zircon and apatite.
- It consists of clasts of angular to rounded quartz, plagioclase, tourmaline and rock fragments, up to 3 mm in diameter.
- Coexisting MI phases in these rocks include garnet, plagioclase, quartz, tourmaline and fluorite.
- Like zircon, quartz, plagioclase, biotite and hornblende, major phenocryst phases, also show variable resorbtion effects.
- The rock consists of plagioclase, K-feldspar, quartz, clinopyroxene and biotite, with abundant apatite, and ilmenite.
- All monazite grains are located in the rock matrix, which consists of quartz, muscovite, biotite, epidote, chlorite, plagioclase, potassium feldspar and garnet with a granoblastic texture.
- Aligned igneous minerals of euhedral potassium feldspar, plagioclase, biotite and hornblende in an undeformed quartz matrix define a magmatic foliation.
- It consists of quartz, K-feldspar, plagioclase, biotite and white mica, and in places displays a graphic texture.
- The mineral assemblage comprises quartz, K-feldspar, albitic plagioclase, white mica, apatite, tourmaline and garnet.
- The first phase of diagenetic albite constitutes an impure, turbid variety including albitized grains of original plagioclase and alkali feldspar.
- The siltstones contain poorly sorted angular fragments of quartz, and angular clasts and cleavage fragments of plagioclase and alkali feldspar.
- Feldspar is dominated by microcline, but plagioclase and perthitic feldspar are also present.
Origin Mid 19th century: from plagio- 'oblique' + Greek klasis 'cleavage' (because originally characterized as having two cleavages at an oblique angle). Definition of plagioclase in US English: plagioclase(also plagioclase feldspar) nounˈplājēəˌklās A form of feldspar consisting of aluminosilicates of sodium and/or calcium, common in igneous rocks and typically white. Example sentencesExamples - The metabasites typically contain coarse-grained hornblende, biotite and plagioclase with accessory titanite.
- It is a reddish brown sandstone formed by detrital quartz, plagioclase, feldspar and muscovite, with subordinate apatite, zircon and opaque minerals.
- The mineral assemblage comprises quartz, K-feldspar, albitic plagioclase, white mica, apatite, tourmaline and garnet.
- The sample is strongly foliated and consists of garnet, biotite, quartz, plagioclase and cordierite.
- Aligned igneous minerals of euhedral potassium feldspar, plagioclase, biotite and hornblende in an undeformed quartz matrix define a magmatic foliation.
- The semi-pelites usually consist of biotite, quartz, plagioclase and untwinncd feldspar, and garnet forms abundant porphyroblasts in some varieties.
- It consists of quartz, K-feldspar, plagioclase, biotite and white mica, and in places displays a graphic texture.
- The Bakfjord Granite contains quartz, K-feldspar, biotite, plagioclase, epidote, allanite, muscovite and occasional garnet.
- The main constituent phases of these rocks are plagioclase, hornblende, pyroxene, quartz and K-feldspar, and accessory phases include magnetite, sphene, zircon and apatite.
- The first phase of diagenetic albite constitutes an impure, turbid variety including albitized grains of original plagioclase and alkali feldspar.
- The siltstones contain poorly sorted angular fragments of quartz, and angular clasts and cleavage fragments of plagioclase and alkali feldspar.
- All monazite grains are located in the rock matrix, which consists of quartz, muscovite, biotite, epidote, chlorite, plagioclase, potassium feldspar and garnet with a granoblastic texture.
- Like zircon, quartz, plagioclase, biotite and hornblende, major phenocryst phases, also show variable resorbtion effects.
- Coexisting MI phases in these rocks include garnet, plagioclase, quartz, tourmaline and fluorite.
- It consists of clasts of angular to rounded quartz, plagioclase, tourmaline and rock fragments, up to 3 mm in diameter.
- Strain shadows around feldspar porphyroclasts contain recrystallized potassium feldspar, plagioclase and quartz.
- The rock consists of plagioclase, K-feldspar, quartz, clinopyroxene and biotite, with abundant apatite, and ilmenite.
- This granulite consists of garnet, biotite, muscovite, quartz, plagioclase and cordierite.
- Like P133, it consists mainly of quartz, feldspar and white mica; plagioclase can also be distinguished under the microscope.
- Feldspar is dominated by microcline, but plagioclase and perthitic feldspar are also present.
Origin Mid 19th century: from plagio- ‘oblique’ + Greek klasis ‘cleavage’ (because originally characterized as having two cleavages at an oblique angle). |