Thalcusite from Nakkaalaaq, the Ilímaussaq alkaline complex, South Greenland

Authors

  • Sven Karup-Møller Environment and Resources, Technical University of Denmark, Kemitorvet, Bygning 204, DK-2800 Lyngby, Denmark
  • Emil Makovicky Geological Institute, University of Copenhagen, Øster Voldgade 10, DK-1350 Copenhagen K, Denmark

DOI:

https://doi.org/10.34194/ggub.v190.5182

Keywords:

agpaite, Ilímaussaq, supergene alteration, thalcusite, thallium minerals

Abstract

Thalcusite from a new locality in the Ilímaussaq complex, the Nakkaalaaq mountain, occurs in a coarse ussingite–aegirine vein and is associated with sphalerite and cuprostibite. The empirical composition is Tl1.89K0.08Cu2.86Fe1.34S4.00. Secondary tenorite–Sb oxide aggregates are developed along cleavages. Tarnish products are essentially pure Cu+ sulphide. All three layered thallium sulphides from the Ilímaussaq complex, thalcusite, chalcothallite and rohaite, contain K substituting for Tl. Varieties with K > Tl were not found in the massif.

Geology of Greenland Survey Bulletin 190 cover

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Published

2001-12-21

How to Cite

Karup-Møller, S. ., & Makovicky, E. . (2001). Thalcusite from Nakkaalaaq, the Ilímaussaq alkaline complex, South Greenland. Geology of Greenland Survey Bulletin, 190, 127–130. https://doi.org/10.34194/ggub.v190.5182

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.