Skip to main content
Fig. 7 | Progress in Earth and Planetary Science

Fig. 7

From: Infiltration metasomatism of the Allende coarse-grained calcium-aluminum-rich inclusions

Fig. 7

Backscattered electron images of Alteration of primary igneous anorthite in the interior regions of the Type B1, B2, and FoB Allende CAIs. Regions outlined in a and e are shown in details in b and f. Anorthite along the boundaries with heavily altered regions of åkermanitic melilite contains irregularly shaped embayments, inclusions along cleavage planes, and veins of Na-melilite, grossular, kushiroite, and wadalite. Occasionally, wadalite is replaced by sodalite. Na-melilite growing into open space shows euhedral outlines (see e and f). Variations in brightness of Na-melilite correspond to variations in Na2O content

Back to article page