TERMIUM Plus®

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ALVIKITE [1 record]

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Alphabetical list of terms

Record 1 2004-03-09

English

Subject field(s)
  • Petrography
DEF

A medium-to fine-grained type of sövite enriched in incompatible elements such as REEs, Ba, Mn, Zn, and commonly Nb.

CONT

C2 carbonatite (alvikite) usually shows marked flow banding and is medium- to fine-grained compared with the coarse-grained sövite.

OBS

[From] Alvik, Alnö Island, Sweden. ([Named by] Eckermann in 1928).

OBS

The boundary between sövite and alvikite is uncertain but may be set at 0.4% MnO, 1500 ppm Ba, and 200 ppm REEs. The calcite of an alvikite is slightly ferroan.

French

Domaine(s)
  • Pétrographie
DEF

[...] type de sövite à grain moyen à fin enrichie en éléments incompatibles tels ÉTR, Ba, Mn, Zn et souvent Nb.

OBS

La limite entre la sövite et l'alvikite n'est pas précise mais peut être fixée à 0,4 % de MnO, 1 500 ppm de Ba et 200 ppm d'ÉTR. La calcite d'une alvikite est légèrement ferrugineuse.

Spanish

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