Experimental calibration of the Al-in-olivine thermometer for garnet peridotites Applicable to olivines from garnet peridotites with an estimated accuracy of ~ ± 20 °C Not applicable to spinel-bearing peridotites, Al vs V-plot may be used to distinguish the facies of single olivine grains Applicability to garnet harzburgites (and lherzolites) makes Al-in-olivine thermometer an important tool in mantle studies