Granophyre

Granophyre

Granophyre ( point, perhaps in the presence of a water-rich phase.

Granophyres typically are intrusive rocks that crystallized at shallow depths, and many have compositions similar to those of granites. A common occurrence of granophyre is within layered igneous intrusions dominated by rocks with compositions like that of gabbro. In such occurrences, the granophyre may form as an end product of fractional crystallization of a parent mafic magma, or by melting of rocks into which the mafic magma was emplaced, or by a combination of the two processes.

See also

* Micrographic texture
* Rock microstructure
* Granite
* Eutectic
* Solidus


Wikimedia Foundation. 2010.

Игры ⚽ Поможем сделать НИР

Look at other dictionaries:

  • granophyre — ● granophyre nom masculin (de porphyre) Granite à texture microgrenue dans lequel quartz et feldspaths ont syncristallisé sous forme de micropegmatites …   Encyclopédie Universelle

  • granophyre — [gran′ōfīr΄] n. [Ger granophyr, arbitrary blend < granit, GRANITE + porphyr, PORPHYRY] an igneous rock similar to granite in composition and appearance, but containing larger crystals of quartz and feldspar in a matrix of a finer grain… …   English World dictionary

  • granophyre — granophyric /gran euh fir ik/, adj. /gran euh fuyeur /, n. a fine grained or porphyritic granitic rock with a micrographic intergrowth of the minerals of the groundmass. [1880 85; GRANO + PHYRE] * * * ▪ rock       fine grained igneous rock that… …   Universalium

  • granophyre — noun Etymology: International Scientific Vocabulary, from grano + French phyre (as in porphyre porphyry) Date: 1882 a porphyritic igneous rock chiefly of feldspar and quartz with granular groundmass • granophyric adjective …   New Collegiate Dictionary

  • granophyre — gran·o·phyre …   English syllables

  • granophyre — gran•o•phyre [[t]ˈgræn əˌfaɪər[/t]] n. pet a porphyritic granitic rock with a micrographic intergrowth of the minerals of the groundmass • Etymology: 1880–85; grano + F (por)phyre porphyry gran o•phy′ric ˈfɪr ɪk adj …   From formal English to slang

  • granophyre — /ˈgrænəfaɪə/ (say granuhfuyuh) noun a fine grained or porphyritic granitic rock with a micrographic intergrowth of the minerals of the groundmass. {German Granophyr, from grano (combining form of Granit granite) + (Por)phyr porphyry} –granophyric …  

  • granophyre — ˈgranəˌfī(ə)r noun ( s) Etymology: International Scientific Vocabulary grano + phyre; originally formed as German granophyr : a porphyritic igneous rock chiefly composed of alkalic feldspar and quartz and having a granular groundmass; also : a… …   Useful english dictionary

  • Micrographic texture — In petrology, micrographic texture is a fine grained intergrowth of quartz and alkali feldspar, interpreted as the last product of crystallization in some igneous rocks which contain high or moderately high percentages of silica. Micropegmatite… …   Wikipedia

  • Misquah Hills — Coordinates: 47°59′N 90°34′W / 47.98°N 90.56°W / 47.98; 90.56 …   Wikipedia

Share the article and excerpts

Direct link
Do a right-click on the link above
and select “Copy Link”