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Metacarbonate slag

A rock subtype
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Type of pyrometamorphic rock formed in expense of carbonate protolith via its calcination (decarbonatization). As such it differs from the artificial, smelting slags.

Typical features of metacarbonate rocks:

- unique mineral composition: magnesioferrite, calcium ferrites (often Mn-rich; srebrodolskite, harmunite, "grandiferrite", and others), fluorellestadite-fluorapatite solid solution, melilite group (gehlenite), cuspidine, maghemite, perovskite, periclase, portlandite, oldhamite, fluorite, rhönite group, Ca-Mg silicates, thaumasite or related species, and other minerals

- occurrence of rather large amounts of Ca carbonates (aragonite, calcite), plus (sometimes) gypsum and anhydrite

- common rounded shape - a reminiscence of the parent carbonate concretion shape

- mineralogical zonation in form of so-called "nutshell"

The metacarbonate slags are often found within partially coalesced (fused together) various lithological types of pyrometamorphic rocks to form a pyrometamorphic breccia.


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Unique IdentifiersHide

Mindat ID:
53428
Long-form identifier:
mindat:1:1:53428:4

Classification of Metacarbonate slagHide

Common AssociatesHide

Associated Minerals Based on Photo Data:
3 photos of Metacarbonate slag associated with MagnesioferriteMgFe3+2O4
2 photos of Metacarbonate slag associated with GehleniteCa2Al[AlSiO7]
2 photos of Metacarbonate slag associated with CuspidineCa8(Si2O7)2F4
2 photos of Metacarbonate slag associated with Glass
2 photos of Metacarbonate slag associated with Buchite
2 photos of Metacarbonate slag associated with HematiteFe2O3
1 photo of Metacarbonate slag associated with FluoriteCaF2
1 photo of Metacarbonate slag associated with SrebrodolskiteCa2Fe3+2O5
1 photo of Metacarbonate slag associated with Giuseppettite(Na,K,Ca)7-8(Al6Si6O24)(SO4,Cl)1-2
1 photo of Metacarbonate slag associated with ForsteriteMg2(SiO4)

Internet Links for Metacarbonate slagHide

References for Metacarbonate slagHide

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