Årg. 195 Nr. 5 (1973): Meddelelser om Grønland

I. INTRODUCTION. p. 5
II. LOCATION OF THE DISCOVERED MINERAL SUITE. p. 6
III. MODE OF OCCURRENCE AND MINERALOGICAL COMPOSITION OF THE MINERAL SUITE. p.  9
IV. MINERAL DESCRIPTION. p. 11
Topaz. p. 11
Fluorspar. p. 11
Weberite. p.11
Quartz. p.11
Muscovite. p. 11
Coffinite-uraninite. p. 11
Gustavite-phase X. p. 14
Berryite. p. 14
Mineral A . p.15
Cosalite. p. 15
Aikinite. p. 15
Galena. p.16
Matildite and argentite ( ?). p. 16
Gold. p.16
Sphalerite. p.17
Pyrite, native bismuth, chalcopyrite, pyrrhotite and marcasite. p. 17
V. MINERAL RELATIONSHIPS. p. 18
Relationships of the matrix gangue minerals. p. 18
Relationships between the sulphide disseminated topaz-fluorspar material and the matrix gangue minerals. p. 20
Relationships between sulphides and host topaz-fluorspar material. p. 21
A. General relationships. p. 21
B. Replacement of gangue by sulphides. p. 22
C. Deformation of the mineral suite material. p. 23
D. Summary sulphide-gangue age relationships. p. 24
Sulphide relationships. p. 24
A. Sulphides disseminated in massive topaz fluorspar material. p. 24
1. Gustavite, phase X and galena. p. 24
2. Cosalite. p. 25
3. Aikinite and berryite. p. 25
4. Mineral A. p. 26
5. Pyrite. p. 26
6. Chalcopyrite, sphalerite, pyrrhotite and marcasite. p. 28
7. Bismuth. p. 28

B. Mineralogy of the deformation zones. p. 28
C. Sulphides disseminated in the gangue matrix minerals. p. 30
VI. P-T-CONDITIONS OF FORMATION OF THE MINERAL SUITE. p. 31
VII. FORMATION OF THE MINERAL SUITE. p. 34
Physical state of the mineralizing fluids. p.  34
Crystallization sequence. p. 34
Changes in the composition of the fluids as crystallization progressed. p. 35
Exsolution minerals. p. 36
VIII. ORIGIN OF THE MINERALIZING FLUIDS. p. 37
IX. CONCLUSION. p. 38
ACKNOWLEDGEMENTS. p. 39
REFERENCES. p. 40