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Mineralogie pp 323-333 | Cite as

Orthomagmatische Erzlagerstätten

  • Martin Okrusch
  • Siegfried Matthes
Chapter
Part of the Springer-Lehrbuch book series (SLB)

Zusammenfassung

Bei der Kristallisation basischer Magmen kommt es oft zur syngenetischen Anreicherung von Erzmineralen, wodurch weltwirtschaftlich bedeutsame Erzlagerstätten von Chromit, Titanomagnetit, Ilmenit, Nickelmagnetkies (Pyrrhotin mit entmischten Pentlandit-Lamellen), Chalkopyrit (Kupferkies) und Platinmetallen (Legierungen von Platin-Gruppen-Elementen PGE) entstehen können. Zwei Bildungsmechanismen sind dabei von großer Wichtigkeit:
  1. 1.

    die Anreicherung von Erzkristallisaten im Zuge von Vorgängen der fraktionierten Kristallisation und

     
  2. 2.

    die Bildung von sulfidischen oder oxidischen Erzschmelzen durch liquide Entmischung aus Sulfid-Oxid-führenden Silikatmagmen.

     

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Copyright information

© Springer-Verlag Berlin Heidelberg 2014

Authors and Affiliations

  1. 1.Univ. Würzburg Mineralogisches InstitutWürzburgDeutschland
  2. 2.Inst. MineralogieUniv. Würzburg Fak. GeowissenschaftenWürzburgDeutschland

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