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含假蓝宝石的高压基性麻粒岩发现于南阿尔金的巴什瓦克地区,在空间上与石榴橄榄岩伴生,并与后者一起呈透镜状分布在含蓝晶石的高压长英质麻粒岩中.假蓝宝石与刚玉、尖晶石和富钙的斜长石组成后成合晶,分布在石榴子石和辉石之间.从反应结构和矿物成分推断,这些含假蓝宝石的后成合晶为早期蓝晶石分解反应的产物.同时,这些后成合晶的形成还涉及到早期的石榴子石和单斜辉石.因此,早期的矿物组合为石榴子石+单斜辉石+蓝晶石+金红石,并推断其形成的压力条件大于2.1GPa,温度在1000℃左右.含假蓝宝石的后成合晶形成于近等温降压或略降温降压的条件下,为岩石在折返或抬升作用过程中的产物.
The sapphire-bearing, high-pressure basaltic granulite was found in the area of Baschewak in the Southern Altyn, which is spatially associated with garnet peridotite and appears with the latter in a lenticular pattern on the kyanite-bearing, In the granulite, sapphirine is composed of corundum, spinel and calcium-rich plagioclase, and then crystallizes between garnet and pyroxene.According to the reaction structure and mineralogy, Is the product of the early kyanite decomposition reaction.At the same time, the formation of these after-forming crystals also involves the early garnet and clinopyroxene.Therefore, the early mineral assemblage is garnet + clinopyroxene + kyanite + Rutile, and deduced that the formation of the pressure conditions greater than 2.1GPa, the temperature at about 1000. Containing sapphirine after into the crystal formed in the near-temperature buck or slightly lower temperature and pressure conditions, the rock in the process of reentry or uplift In the product.