| 释义 |
Definition of oligoclase in English: oligoclasenoun ˈɒlɪɡə(ʊ)kleɪzˈɑləɡoʊˌkleɪs mass nounA feldspar mineral common in siliceous igneous rocks, consisting of a sodium-rich plagioclase (with more calcium than albite). 奥长石 Example sentencesExamples - They recognized kyanite-staurolite assemblages in pelites to the north of the Annagh Gneiss Complex exposures, but only garnet and oligoclase to the south.
- Here it was found sparsely as rounded grains associated with pargasite, diopside, oligoclase and lazurite.
- Granite sample RHGI can be modelled by continuing this felsic scheme, for example with 22% fractionation of oligoclase, amphibole, biotite and the usual minor apatite and titanite.
- They range from bytownite - labradorite in basalts and gabbros, andesine - oligoclase in diorites and andesites to albite in granites and rhyolites.
- It is composed of quartz, oligoclase, and microcline, with minor garnet, biotite, muscovite and iron-oxides.
- However, this assumption is inconsistent with the fairly simultaneous appearance of the second garnet generation and oligoclase.
OriginMid 19th century: from oligo- 'relatively little' + Greek klasis 'breaking' (because thought to have a less perfect cleavage than albite). Definition of oligoclase in US English: oligoclasenounˈɑləɡoʊˌkleɪsˈäləɡōˌklās A feldspar mineral common in siliceous igneous rocks, consisting of a sodium-rich plagioclase (with more calcium than albite). 奥长石 Example sentencesExamples - They range from bytownite - labradorite in basalts and gabbros, andesine - oligoclase in diorites and andesites to albite in granites and rhyolites.
- They recognized kyanite-staurolite assemblages in pelites to the north of the Annagh Gneiss Complex exposures, but only garnet and oligoclase to the south.
- Granite sample RHGI can be modelled by continuing this felsic scheme, for example with 22% fractionation of oligoclase, amphibole, biotite and the usual minor apatite and titanite.
- Here it was found sparsely as rounded grains associated with pargasite, diopside, oligoclase and lazurite.
- However, this assumption is inconsistent with the fairly simultaneous appearance of the second garnet generation and oligoclase.
- It is composed of quartz, oligoclase, and microcline, with minor garnet, biotite, muscovite and iron-oxides.
OriginMid 19th century: from oligo- ‘relatively little’ + Greek klasis ‘breaking’ (because thought to have a less perfect cleavage than albite). |