caa a22 4500 465791417 CHVBK 20180323112025.0 cr unu---uuuuu 170327e19901101xx s 000 0 eng 10.1007/BF00306529 doi (NATIONALLICENCE)springer-10.1007/BF00306529 Nickeliferous sulfides in xenoliths, olivine megacrysts and basaltic glass [Elektronische Daten] [Michael Fleet, William Stone] The composition of olivine and nickeliferous sulfide inclusions from a selection of mafic and ultramafre rocks, xenoliths and megacrysts, including picritic basalts from Kilauea Volcano, Hawaii, kimberlite from Fayette County, Pennsylvania, and megacrysts from Mount Shasta, California are compared with the mean experimental value of the distribution coefficient for Ni/Fe exchange (KD3=32). Only nine of the forty five olivipe/bulk-sulfide pairs investigated have compositions consistent with equilibration at high temperature, yielding calculated KD3 values in the range 22 to 41. The remaining pairs have calculated KD3 values which range from 0 to 19. Bulk-sulfides in disequilibrated assem-blages are consistently depleted in nickel and within both indivudual associations and individual petrographic sections they exhibit a wide variation in NiS content. The bulk copper contents of olivine-and groundmass-hosted sulfides from Kilauea Volcano range from 0.5 to 43 at%, and samples from the Kilauea Iki lava lake are more Fe-and Cu-rich and generally have lower KD3 values than those from the eruption itself. As with magmatic Ni−Cu sulfide deposits, most nickeliferous sulfide inclusions in mantle-related rocks and xenoliths and in volcanic rocks do not have pristine early-magmatic bulk compositions, and it would seem to be premature to attribute these sulfides solely to either a mantle or an early-magnatic origin. Springer-Verlag, 1990 Fleet Michael Department of Geology, University of Western Ontario, N6A 5B7, London, Ontario, Canada aut Stone William Department of Geology, University of Western Ontario, N6A 5B7, London, Ontario, Canada aut Contributions to Mineralogy and Petrology Springer-Verlag 105/6(1990-11-01), 629-636 0010-7999 105:6<629 1990 105 410 https://doi.org/10.1007/BF00306529 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/BF00306529 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Fleet Michael Department of Geology, University of Western Ontario, N6A 5B7, London, Ontario, Canada aut NATIONALLICENCE 700 1- Stone William Department of Geology, University of Western Ontario, N6A 5B7, London, Ontario, Canada aut NATIONALLICENCE 773 0- Contributions to Mineralogy and Petrology Springer-Verlag 105/6(1990-11-01), 629-636 0010-7999 105:6<629 1990 105 410 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer