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carbonate mineral [1 record]

Record 1 2004-12-22

English

Subject field(s)
  • Mineralogy
  • Geochemistry
CONT

Carbonatites are igneous rocks which contain at least 50% modal carbonate minerals, mainly calcite, dolomite, ankerite, or sodium- and potassium-bearing carbonates ...

CONT

Carbonatization is the most common ... type of alteration. It typically involves progressive replacement of Ca-, Fe-, and Mg-bearing minerals (pyroxenes, amphiboles, chlorite, epidote, serpentine, and biotite) in the host rocks by carbonate minerals.

CONT

Although the carbonate minerals do not form a homogeneous group, it is convenient to discuss them under a single heading in three major groups: (1) Hexagonal carbonates. ... (2) Orthorhombic carbonates. ... (3) Basic carbonates.

CONT

The dominant minerals of the oxide zone are pyrolusite and psilomelane. The principal carbonate minerals are manganocalcite and rhodochrosite.

French

Domaine(s)
  • Minéralogie
  • Géochimie
DEF

Classe de minéraux caractérisés par l'ion CO34.

CONT

Les carbonatites sont des roches ignées qui renferment au moins 50 % de carbonates (concentrations modales), surtout de la calcite, de la dolomite, de l'ankérite, ou des carbonates sodiques et potassiques [...]

CONT

Minéraux d'origine chimique ou biologique [...] A) Carbonates.- La calcite ou carbonate de chaux [...] L'aragonite [...] La dolomie [...] La sidérose [...]

CONT

La dolomie ferrifère et l'ankérite sont les minéraux carbonatés dominants [...]

OBS

Ces minéraux [carbonates] sont nombreux mais seuls trois d'entre eux sont importants : la calcite, l'aragonite et la dolomite.

Spanish

Campo(s) temático(s)
  • Mineralogía
  • Geoquímica
DEF

Mineral caracterizado por la presencia del ion (CO3)2-, cual ocurre con el aragonito, la calcita, la dolomita y otras rocas carbonatadas.

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