Sulfide mineralogy and chalcophile and siderophile element abundances in the Ivrea-Verbano mantle peridotites (Western Italian Alps)

Details Sulfide mineralogy and chalcophile and siderophile element abundances in the Ivrea-Verbano mantle peridotites (Western Italian Alps) Sulfide mineralogy and chalcophile and siderophile element abundances in the Ivrea-Verbano mantle peridotites (Western Italian Alps)

Sep 1984

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984e%26psl..70...69g&link_type=abstract

Earth and Planetary Science Letters (ISSN 0012-821X), vol. 70, no. 1, Sept. 1984, p. 69-87. Research supported by the Consiglio

Computer Science

28

Earth Mantle, Geochemistry, Mineralogy, Peridotite, Sulfides, Abundance, Alps Mountains (Europe), Italy, Mineralogy, Planetary Evolution

Scientific paper

The mineralogy of sulfide assemblages and the abundances of chalcophile and siderophile elements are determined in samples of peridotite massifs (supposed to be mantle fragments partially melted beneath a plate-collision area) from Baldissero, Balmuccia, and Finero in the Western Italian Alps. The S content is measured by pyrolysis; sulfide phases are subjected to microscopic examination and microprobe analysis; and trace and ultratrace elements are determined by flame and nonflame AAS analyses and vapor hydride-forming techniques. The results are presented in tables and graphs and characterized in detail, and the implications for the composition of the early mantle are explored. The sulfide component is found to determine the abundances of both chalcophile and strongly siderophile elements and to vary closely with the degree of melting. It is inferred from the nonprimary nature of sulfide components in ultramalfic xenoliths that these materials are not representative of the primitive mantle.

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