1 EXPERIMENTAL STUDY OF THE ROLE OF TIN AT THE FORMATION OF PLATINUM- PALLADIUM PHASES DURING THE CRYSTALLIZATION OF CU-FE-S MELT

• Main Author: Kravchenko T. A
• Other Authors: The Pennsylvania State University CiteSeerX Archives
• Format: Text
• Language: English
• Subjects: Norilsk; norilsk
• Online Access: http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.424.1240; http://geo.web.ru/conf/khitariada/informbul-1/term-10.engl.pdf

The interest in the role of tin at crystallization of sulfide melt, which contains platinum and palladium, is related the fact that tin minerals with platinum and palladium (analogs of the corresponding Fe minerals) are the most common in sulfide ores from Norilsk deposits. Despite a large body of research the conclusions about their possible crystallization immediately from magmatic melt at high temperatures are ambiguous [1,2]. Cu-Fe-S system is chosen as a model, its central part according to composition corresponds to the most common natural associations of copper-pyrite ores. The methodical peculiarity of the given study is that tin like platinum with palladium is introduced into the samples of the studied system as a micro component (not more than 1wt %). This study allows us to synthesize tin-containing phases within the framework of Cu-Fe-S three component system and to compare them with the results of crystallization of Pt-Pd-bearing melt of the same composition, but without tin. The platinum behavior depending on the change of the iron and tin content in the crystallizing sulfide melt (it contains 1wt % of Pt) of FeS-SnS binary system has been preliminary evaluated. Platinum-ferrous phases have not been distinguished in all synthesized samples. The whole of platinum is bound with tin forming phases of PtSn or PtSn2 composition; they are synthetic analogs of