Manganiferous minerals of the epidote group from the Archaean basement of West Greenland

Anna Katerinopoulou, Tonci Balic-Zunic, Jochen Kolb, Alfons Berger, Karsten Secher

Research output: Contribution to journalArticleResearchpeer-review

2 Citations (Scopus)

Abstract

The chemical compositions and crystal structures of Mn3+-containing minerals from the epidote group in Greenland rocks are investigated and described in detail. They occur in hydrothermally altered Archaean mafic sequences within the gneissic complex of the North Atlantic craton of West Greenland. The Mn-containing minerals have a characteristic red to pink colour. A detailed microchemical study shows a significant inter- and intra-sample variation in Mn content. The samples from different parageneses can be classified as Mn-bearing epidote and Mn-bearing clinozoisite. The intra-sample variation in the content of Al, Fe and Mn is on a very fine scale, but still allows for identification of a negative correlation between Mn and Fe. Textures indicate different stages of growth. Crystal chemical data are compared with literature data and illustrate the basic systematic differences between the influence of Fe and Mn on the crystal structure of the epidote group minerals.

Original languageEnglish
Pages (from-to)27-38
Number of pages12
JournalBulletin of the Geological Society of Denmark
Volume62
DOIs
Publication statusPublished - Dec 2014

Keywords

  • Clinozoisite
  • Epidote
  • Greenland
  • Manganiferous minerals

Programme Area

  • Programme Area 4: Mineral Resources

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