Chrome diopside vein in peridotite mantle xenolith.

San Carlos Volcanic Field, San Carlos Apache Reservation, Arizona

#peridotite #xenolith #lherzolite #geology #geoscience #chromediopside #pyroxene #clinopyroxene #Volcano

Spinel lherzolite mantle xenolith hosted by phonotephrite (collected with permission)

San Carlos Volcanic Field, San Carlos Apache Reservation, Arizona

#peridotite #xenolith #lherzolite #geology #geoscience #volcano

Currently back in Hawaiʻi, check out this #Spinel #lherzolite mantle #xenolith

#geoscience #geology #volcanology #volcano

#Spinel #Lherzolite
Honolulu Volcanics peridotites (but not pyroxenites) are notable for their lack of hydrous minerals suggesting cryptic metasomatism. Olivines of the most Si02-undersaturated lavas/pyroclastics have rather larnitic rims, something my mind associates with carbonatite metasomatism.

Currently back in Hawaiʻi among #Honolulu #Volcanics #ultramafic #mantle xenoliths.

1. #Garnet #clinopyroxenite
2. #Spinel #lherzolite
3. Garnet clinopyroxenite hosted in #melilite #nephelinite #tuff
4. Hybrid(?) #Pyroxenite - #peridotite #xenolith

#geoscience #geology #volcanology #volcano

lherzolite - a type of rock - with coin for scale

Peridotite - serpentinized lherzolite from Fortullino, Rosignano Marittimo, Italy

#peridotite #geology #lherzolite
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