A note on the occurrence of gold in the Ilímaussaq alkaline
Single grains of gold measuring 22 µm have been found in analcime veinlets intersecting concentrations of pyrrhotite, pyrite and marcasite in the lowermost part of layer +16 red of the kakortokite sequence in the southernmost part of the Ilímaussaq alkaline com-plex (Davison 1989). The kakortokite s...
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| Format: | Text |
| Language: | English |
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| Online Access: | http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.514.4015 http://www.geus.dk/publications/bull-gl/nr190/nr190_p167.pdf |
| Summary: | Single grains of gold measuring 22 µm have been found in analcime veinlets intersecting concentrations of pyrrhotite, pyrite and marcasite in the lowermost part of layer +16 red of the kakortokite sequence in the southernmost part of the Ilímaussaq alkaline com-plex (Davison 1989). The kakortokite sequence con-sists of a repetition of units of lower black layers rich in arfvedsonite, red layers rich in eudialyte and white layers rich in microcline (cf. Sørensen 2001, this vol-ume, for a review of the geology of the Ilímaussaq complex). Layer +16 red is the most prominent eudi-alyte-rich layer of the complex. The identification of the gold grains was verified by SEM- Energy disper-sive X-ray analysis (Fig. 1). Flotation concentrates of the sulphide minerals |
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