Hiortdahlite II from the Ilímaussaq alkaline complex, South Greenland, the Tamazeght complex, Morocco, and the Iles de Los, Guinea

Authors

  • Encarnacion Roda Robles Departamento de Mineralogía y Petrología, Universidad del Pais Vasco/EHU, Apdo. 644, E-48080 Bilbao, Spain
  • François Fontan Laboratoire de Minéralogie UMR 5563, Université Paul Sabatier, 39 Allées Jules Guesde, F-31000 Toulouse, France
  • Pierre Monchoux Laboratoire de Minéralogie UMR 5563, Université Paul Sabatier, 39 Allées Jules Guesde, F-31000 Toulouse, France
  • Henning Sørensen Geological Institute, University of Copenhagen, Øster Voldgade 10, DK-1350 Copenhagen K, Denmark
  • Philippe de Parseval Laboratoire de Minéralogie UMR 5563, Université Paul Sabatier, 39 Allées Jules Guesde, F-31000 Toulouse, France

DOI:

https://doi.org/10.34194/ggub.v190.5183

Keywords:

agpaite, hiortdahlite, Ilímaussaq, nepheline syenites

Abstract

At Ilímaussaq hiortdahlite has only been known from a dyke located immediately to the south-east of the complex. This mineral has now been found in a pegmatite horizon in the sodalite-rich rock naujaite of the complex. It appears to be earlier than eudialyte and is regarded as having been formed at low alkalinity at an early stage of naujaite formation. The optical and X-ray parameters are identical to the data for hiortdahlite from Kipawa, Quebec, and indicate that the Ilímaussaq mineral is type II hiortdahlite. Minerals from the Iles de Los, Guinea, and the Tamazeght complex, Morocco, have been examined by optical and X-ray methods and chemical analysis, and are shown also to be hiortdahlite II.

Geology of Greenland Survey Bulletin 190 cover

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Published

2001-12-21

How to Cite

Roda Robles, E., Fontan, F., Monchoux, P. ., Sørensen, H. ., & de Parseval, P. . (2001). Hiortdahlite II from the Ilímaussaq alkaline complex, South Greenland, the Tamazeght complex, Morocco, and the Iles de Los, Guinea. Geology of Greenland Survey Bulletin, 190, 131–137. https://doi.org/10.34194/ggub.v190.5183

Issue

Vol. 190 (2001): The Ilímaussaq alkaline complex, South Greenland: status of mineralogical research with new results

Section

RESEARCH ARTICLE

License

This article is distributed under a CC-BY 4.0 licence, permitting free redistribution and reproduction for any purpose, even commercial, provided proper citation of the original work. Author(s) retain copyright over the article contents.