Fig. 2: Carbonate-sulfide textures in the lower crust at Valmaggia.
From: Fluxing of mantle carbon as a physical agent for metallogenic fertilization of the crust
a Pyrrhotite (po) with pentlandite (pn) and chalcopyrite (cpy) sulfide blebs with calcite rims hosted within hydrous ultramafic assemblage of phlogopite, orthopyroxene, olivine, and apatite. Mineral map image generated using ZEISS’ Mineralogic; b backscattered electron image of Mn-Fe carbonate and Pd-telluride inclusion within pyrrhotite shown in a; c cross-polarized, transmitted light image of sulfide bleb within the Valmaggia alkaline ultramafic rocks with calcite rims around sulfide; d enlarged image (reflected and transmitted, plane polarized light) from c, showing calcite rims to the sulfide and Fe-Mn-carbonate inclusions; e reflected light (cross-polarized) image of crystalline calcite around the margin of a pyrrhotite, troilite (tr), pentlandite sulfide bleb from Valmaggia.
