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HENRYMEYERITE IN THE METASOMATIZED UPPER MANTLE OF EASTERN ANTARCTICA

Lia N. Kogarko^1,, Gero Kurat² and Theodoros Ntaflos³

¹ Vernadsky Institute of Geochemistry and Analytical Chemistry, Kosygin str. 19, Moscow, 117975, Russia
² Burgring 7, A-1010 Vienna, Austria
³ Department of Lithospheric Sciences, University of Vienna, Althanstrasse 9, A-1090 Vienna, Austria

View larger version (164K): [in this window] [in a new window]   FIG. 1. Back-scattered-electron image of the mineral association containing henrymeyerite. Cpx-1: first-generation clinopyroxene, Cpx: second-generation clinopyroxene, Ol: olivine, Dol: dolomite, CC: calcite, black: magnesite and humite-group mineral, Hm: henrymeyerite, Ap: apatite, Hum: humite-group mineral.

View larger version (145K): [in this window] [in a new window]   FIG. 2. Back-scattered-electron image of the very late assemblage of minerals including henrymeyerite. Cpx: second-generation clinopyroxene, Hm: henrymeyerite, Mc: late mica, black: background magnesite and humite-group mineral. The grey spot in the core of henrymeyerite on the right side of the photomicrograph is the trace of microprobe beam.