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CHARNOCKITIC [1 record]

Record 1 2015-04-09

English

Subject field(s)
  • Petrography
  • Geology
CONT

The setting, age, and chemistry of AQD/SC is similar to dioritic and charnockitic lithologies in other orogens of the North Atlantic region...

CONT

... intrusives of charnockitic composition, often intruded into pelitic supracrustal rocks.

CONT

Charnockitic rocks are lithologically and chemically gradational with the layered unit, possibly due to contact metamorphism and metasomatism of the anorthosite suite during intrusion of the charnockite.

French

Domaine(s)
  • Pétrographie
  • Géologie
CONT

Les complexes charnockitiques. Toutes les roches qui les constituent, des norites aux granites et aux gneiss à pyroxène, présentent un «air de famille», déterminé par une gamme de minéraux : plagioclase [...]; feldspath potassique perthitique [...] orthopyroxènes [...]; hornblende; biotite; ilménite [...] C'est à ces cortèges, et non à un type pétrographique déterminé qu'il faut aujourd'hui réserver le nom de «charnockites», ou mieux de «complexes charnockitiques.

CONT

Complexe charnockitique : association de granulites, de charnockites, de gabbros, d'anorthosites et de péridotites, caractéristique de la base de la croûte continentale.

Spanish

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