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Litchfieldit

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Zusatzangaben / Zusammenfassung

Litchfieldit
Litchfieldit

Canaa Massiv, Rio de Janeiro, Brasilien

Eurico Zimbres

Gruppierung

Zugehörig zu

Gesteine  ⇒ Magmatisches Gestein und Sediment  ⇒ Kristallin magmatisches Gestein  ⇒ Normal kristallines Gestein  ⇒ Grobkörnig kristallines Gestein  ⇒ Foid-Syenitisches-Gestein  ⇒ Foid-Syenit  ⇒ Nephelin-Syenit

Andere Sprachen

Deutsch

Litchfieldit

Englisch

litchfieldite

Ausführliche Beschreibung

Litchfieldite is a rare igneous rock. It is a variety of nepheline syenite and is composed of two near pure phases of feldspar, albite and microcline, with predominance of the first one, plus nepheline, sodalite, cancrinite and calcite. The mafic minerals, when present, are magnetite and an iron rich biotite (lepidomelane).

The rock was named after its occurrence at Litchfield, Maine, USA, by Bayley in 1892

It is a very rare rock and also occurs in Blue Mountain and French River, Canada; Soroy and Val River, Norway; Cevadais, Portugal; Canaã, Boca Nova, Itajú da Colonia and Peixes, Brazil.

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