Interfacial tension studies between Fe-Cu-Ni sulfide and halo-norilsk basalt slag system

• Published in: Science in China Series D: Earth Sciences
• Main Authors: Su, S. (Shangguo), Mungall, J.E. (James E.), Wang, J. (Jian), Geng, K. (Ke)
• Format: Article in Journal/Newspaper
• Language: English
• Published: 2005
• Subjects: Cu-Ni sulfide deposit; Interfacial tension; Matte; Slag; Norilsk; norilsk
• Online Access: https://ir.library.carleton.ca/pub/22675; https://doi.org/10.1360/03yd0023

The interfacial tension of the matte/halo-Norilsk basalt slag systems of FeS-Cu2S-Ni3S2 and FeO-FeS were investigated using the sessile drop technique. The results indicate that interfacial tension decreases with increasing copper and nickel contents in the matte of FeS-Cu 2S-Ni3S2 system while it increases with increasing oxygen content in the matte of FeO-FeS system. It is inferred from these results that two conditions are critical for the formation of giant Cu-Ni sulfide deposits. One is that mafic-ultramafic parent magma of sulfide deposits should be rich in copper and nickel where due to the low interfacial tension, it is difficult to form sulfide droplet in the early stage of magma evolution. In other words, sulfide liquid conglomeration occurs more difficultly. The other condition is that the magma emplacement should be shallow; and a lot of faults occur in the magma emplacement field. Since oxygen content is high in the environment, interfacial tension is high, which helps sulfide liquid conglomeration and consequently Cu-Ni sulfide deposits form. Copyright by Science in China Press 2005.