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LAMPROITE [1 record]

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Alphabetical list of terms

Record 1 2004-02-16

English

Subject field(s)
  • Petrography
  • Precious Stones (Mining)
DEF

A group name for dark-colored hypabyssal or extrusive rocks rich in potassium and magnesium.

CONT

Lamproite formed at great depth and was forced to the surface ... as volcanic pipes, dikes, and sills.

CONT

Diamonds ... are found in ... various igneous rock types of deep-seated origin (kimberlite, orangeite, lamproite, alnoite, aillikite, picritic monchiquite, alkali basalt) ...

French

Domaine(s)
  • Pétrographie
  • Exploitation de pierres précieuses
DEF

Roche ignée effusive alcaline, particulièrement riche en potassium, avec de la sanidine et/ou de la leucite, et du mica noir de type phlogopite.

CONT

Les diamants se rencontrent dans [...] des roches ignées d'origine profonde de différents types (kimberlite, orangéite, lamproïte, alnoïte, aillikite, monchiquite picritique et basalte alcalin) [...]

Spanish

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