Definition of leucite syenite. Meaning of leucite syenite. Synonyms of leucite syenite

Here you will find one or more explanations in English for the word leucite syenite. Also in the bottom left of the page several parts of wikipedia pages related to the word leucite syenite and, of course, leucite syenite synonyms and on the right images related to the word leucite syenite.

Definition of leucite syenite

leucite syenite
Syenite Sy"e*nite, n. [L. Syenites (sc. lapis), from Syene, Gr. ?.] (Min.) (a) Orig., a rock composed of quartz, hornblende, and feldspar, anciently quarried at Syene, in Upper Egypt, and now called granite. (b) A granular, crystalline, ingeous rock composed of orthoclase and hornblende, the latter often replaced or accompanied by pyroxene or mica. Syenite sometimes contains nephelite (el[ae]olite) or leucite, and is then called nephelite (el[ae]olite) syenite or leucite syenite.

Meaning of leucite syenite from wikipedia

- melt is produced, forming a nepheline syenite, where orthoclase is replaced by a feldspathoid such as leucite, nepheline or analcime. Conversely in certain...
- Leucite also is rare in plutonic rocks and **** rocks, but leucite syenite and leucite tinguaite bear witness to the possibility that it may occur in...
- pyroxene-melanite bearing nepheline syenite variety which contains nepheline-alkali feldspar pseudomorphs interpreted to be after leucite which occur as con****uous...
- at Julianehaab in Greenland with sodalite-syenite; at their margins they contain pseudomorphs after leucite. The lujaurites frequently have a parallel-banding...
- transitions between syenites of ordinary type and nepheline — or leucitesyenite, and between gabbro or dolerite and theralite or es****ite. But, as...
- is a variation of the igneous rock trachyte that contains nepheline or leucite rather than quartz. It has an unusually high (12% or more) Na2O + K2O content...
- minerals. For example, a syenite with significant nepheline present can be termed a nepheline-bearing syenite or nepheline syenite, with the term nepheline...
- igneous rocks. These include nepheline syenite, foidite, and phonolite. It is often found along with leucite, sodalite, pot****ium feldspars, and sodium-rich...
- them as the nepheline syenites have to the phonolites. A leucite-augite rock, resembling ijolite except in containing leucite in place of nepheline,...
- enriched with silica and alkali metals. It is the volcanic equivalent of syenite. Trachyte is common wherever alkali magma is erupted, including in late...