SKARNS — Sous l’action des solutions hydrothermales qui accompagnent la mise en place d’un magma granitique au sein de roches encaissantes en partie carbonatées apparaissent des roches particulières: les skarns. On appelle ainsi une cornéenne (roche du… … Encyclopédie Universelle
skarnsknægt — skarns|knægt sb., en, e, ene … Dansk ordbog
skarnsstreg — skarns|streg sb., en, er, erne … Dansk ordbog
Skarn — is a metamorphic rock that is usually variably colored green or red, occasionally grey, black, brown or white. It usually forms by chemical metasomatism of rocks during metamorphism and in the contact zone of magmatic intrusions like granites… … Wikipedia
skarn — In geology, a metamorphic zone developed in the contact area around igneous rock intrusions when carbonate sedimentary rocks are invaded by and replaced with chemical elements that originate from the igneous rock mass nearby. Many skarns also… … Universalium
mineral deposit — Introduction aggregate of a mineral in an unusually high concentration. About half of the known chemical elements (chemical element) possess some metallic (metal) properties. The term metal, however, is reserved for those chemical… … Universalium
MÉTASOMATOSE ET SPILITISATION — La métasomatose comprend l’ensemble des phénomènes qui modifient la composition chimique des roches relativement aux constituants non volatils. Ces phénomènes aboutissent au remplacement, partiel ou total, d’une roche par une autre, accompagné… … Encyclopédie Universelle
diopside — /duy op suyd, sid/, n. Mineral. a monoclinic pyroxene mineral, calcium magnesium silicate, CaMg(SiO3)2, occurring in various colors, usually in crystals. [1800 10; DI 3 + Gk óps(is) appearance + IDE] * * * Common silicate mineral in the pyroxene… … Universalium
Cornubian batholith — Map showing the main granite outcrops of the Cornubian batholith in southwest England and the location of Haig Fras the 20 mGal Bouguer anomaly is also shown as this indicates the location of the negative anomalies associated with these… … Wikipedia
MÉTAMORPHISME — Les roches métamorphiques résultent de la transformation à l’état solide des roches sédimentaires, des roches magmatiques et de roches métamorphiques plus anciennes, lorsque celles ci sont portées dans des conditions physiques et chimiques… … Encyclopédie Universelle