- metasomatic rock
- метасоматическая горная порода
English-Russian mining dictionary. В.П. Манышев.
metasomatic rock
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metasomatic replacement — Process of simultaneous solution and deposition in which one mineral replaces another. It is the method by which wood is petrified (silica replaces the wood fibres), minerals form pseudomorphs (new minerals that preserve the characteristic… … Universalium
Metasomatic — Metasomatism Met a*so ma*tism, n. [Pref. meta + Gr. ?, ?, body.] (Geol.) An alteration in a mineral or rock mass when involving a chemical change of the substance, as of chrysolite to serpentine; opposed to ordinary metamorphism, as implying… … The Collaborative International Dictionary of English
metamorphic rock — Any of a class of rocks that result from the alteration of preexisting rocks in response to changing geological conditions, including variations in temperature, pressure, and mechanical stress. The preexisting rocks may be igneous, sedimentary,… … Universalium
Common occurrences of rock-forming garnets — ▪ Table Common occurrences of rock forming garnets almandine metamorphic rocks especially mica schists, amphibolites, and granulites; granites, aplites, and granitic pegmatites spessartine granitic pegmatites; silica rich skarns; metamorphosed… … Universalium
Metasomatism — is the chemical alteration of a rock by hydrothermal and other fluids. Metasomatism can occur via the action of hydrothermal fluids from an igneous or metamorphic source. Metasomatic albite + hornblende + tourmaline alteration of metamorphosed… … Wikipedia
Fen Complex, Norway — The Fen complex in Nome, Telemark, Norway is a region noted for an unusual suite of igneous rocks. Several varieties of carbonatite are present in the area as well as lamprophyre, ijolite and other highly alkalic rocks. It is the type locality… … Wikipedia
Myrmekite — describes a vermicular, or wormy, intergrowth of quartz in plagioclase. The intergrowths are microscopic in scale, typically with maximum dimensions less than 1 millimeter. The plagioclase is sodium rich, usually albite or oligoclase. These… … Wikipedia
Metamorphism — For other uses, see Metamorphism (disambiguation). Schematic representation of a metamorphic reaction. Abbreviations of minerals: act = actinolite; chl = chlorite; ep = epidote; gt = garnet; hbl = hornblende; plag = plagioclase. Two minerals… … Wikipedia
Pegmatite — is a very coarse grained igneous rock that has a grain size of 20 mm or more; such rocks are referred to as pegmatitic .Most pegmatites are composed of quartz, feldspar and mica; in essence a granite . Rarer intermediate and mafic pegmatite… … Wikipedia
Isua greenstone belt — The Isua greenstone belt is an Archean greenstone belt in southwestern Greenland dated at 3.8 3.7 Ga and contains the oldest known, well preserved, metavolcanic (metamorphosed mafic volcanic), metasedimentary and sedimentary rocks on Earth. It… … Wikipedia
replacement deposit — In geology, a mineral deposit formed by chemical processes that dissolve the original rock and deposit a new assemblage of minerals in its place. See also metasomatic replacement. * * * in geology, mineral deposit formed by chemical… … Universalium
