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PEGMATITE ELEMENTS RARES [1 record]

Record 1 2004-07-13

English

Subject field(s)
  • Petrography
CONT

Rare element pegmatites occur in less deeply eroded Abukuma-type metamorphic terranes, generally of cordierite-amphibolite facies. They are commonly peripheral to larger granitic plutons that, in many cases, represent the parental granite from which the pegmatite was derived.

CONT

Rare element pegmatites have been subdivided ... into rare-earth, beryl, complex, albite-spodumene, and albite types ...

French

Domaine(s)
  • Pétrographie
CONT

Les pegmatites à éléments rares se rencontrent dans des terranes moins profondément érodés ayant été soumis à un métamorphisme de type Abukuma, généralement du faciès des amphibolites à cordiérite. Elles se trouvent souvent en périphérie de plutons granitiques plus vastes qui, dans de nombreux cas, représentent le granite parental duquel est dérivée la pegmatite.

CONT

[On] a subdivisé les pegmatites à éléments rares en pegmatites à terres rares, pegmatites à béryl, pegmatites complexes, pegmatites à albite-spodumène et pegmatites à albite [...]

Spanish

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