The metasedimentary xenoliths of Tallante have quartz-rich parageneses containing green spinel ± garnet ± sillimanite ± plagioclase (An43–83) ± alkaline feldspars (Or40Ab60). Generally, cordierite occurs between quartz and spinel, suggesting the reaction spinel + quartz = cordierite. Cordierite also forms symplectites with quartz and spinel, a microstructure generally interpreted as a pseudomorph after garnet and/or Al2SiO5, which in this PF-04217903 case was sillimanite. Accessory phases are rutile, ilmenite and magnetite (Bianchini et al., 2013).
The igneous xenoliths display a cumulus texture, resulting from deep magmatic crystallization processes. They can be subdivided in: a) light colored norites dominated by plagioclase and orthopyroxene and b) dark colored amphibole (± phlogopite)-clinopyroxenites containing (in order of abundance) clinopyroxene, amphibole (amph), olivine, phlogopite (ph) and glass (Bianchini et al., 2011 and Bianchini et al., 2013). The two distinct types of igneous lithologies are diastole plausibly related to distinct parental magmas.
The igneous xenoliths display a cumulus texture, resulting from deep magmatic crystallization processes. They can be subdivided in: a) light colored norites dominated by plagioclase and orthopyroxene and b) dark colored amphibole (± phlogopite)-clinopyroxenites containing (in order of abundance) clinopyroxene, amphibole (amph), olivine, phlogopite (ph) and glass (Bianchini et al., 2011 and Bianchini et al., 2013). The two distinct types of igneous lithologies are diastole plausibly related to distinct parental magmas.