Distribution and chemical variation of sulphide minerals in the Merensky Reef,eastern Bushveld Complex,South Africa
Sulphide minerals in the Merensky Reef in the eastern limb of the Bushveld Complex were investigated in order to reveal formation and distribution of sulphide minerals.Samples used in this study are anorthosite,norite,pyroxenite reef,and chromitite stringer.Sulphide minerals mainly consist of pyrrhotite,chalcopyrite,pentlandite and pyrite.Occurrence of sulphide is divided into interstitial sulphide and sulphide inclusion.Interstitial sulphides contact with silicate and/or oxide minerals.Some of the sulphides has boundary with secondary hydrous minerals.Sulphide inclusion is entrapped by pyroxene,plagioclase and chromite.Sulphide content varies <0.1-5 vol% and its content in the pyroxenite and chromitite stringer is higher than that of anorthosite and norite.Sulphide minerals in each rock are generally disseminated and some of the minerals exist vertically.Occurrence of sulphide inclusion indicates that sulphur was saturated at the early stage of silicate crystallization in magma which made the pyroxenite reef.Vertical distribution of sulphides may suggest that sulphides percolated down in the melt during its crystallization,which has been proposed by Barnes & Maier (2002).
K.Shindo H.M.Rajesh
Department of Geology,University of Johannesburg,South Africa/ PO Box 524 Auckland Park 2006,Kingsway & University(APK campus),Johannesburg,South Africa
国际会议
贵阳
英文
70-72
2012-06-16（万方平台首次上网日期，不代表论文的发表时间）