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运用电子探针测定了云南哀牢山伟晶岩和新疆可可托海伟晶岩矿物中熔融包裹体及流体 熔融包裹体子矿物成分。据 73个包裹体中 12 0个测点分析结果 ,鉴定出锌尖晶石、刚玉、磷灰石、磁铁矿、白云母、黑云母、钾长石、钠长石、绿柱石和石英等 10种子矿物 ,并确定矿物组合 2 7个。其中锌尖晶石、刚玉在两地区伟晶岩熔融包裹体中属首次发现 ,磷灰石成分属首次测定。两地伟晶岩矿物的熔融及流体 熔融包裹体中子矿物成分及矿物组合各异 ,包裹体中子矿物与主矿物的化学成分存在一定演化规律 ,可作为了解伟晶岩浆结晶分异作用、元素演化规律的依据。研究表明 ,伟晶岩存在局部岩浆分异作用 ,岩浆具不混溶性及非均匀性。此成果对了解伟晶岩物质成分、形成机制及成因研究具重要意义。对岩浆岩、地幔岩及陨石研究也有一定启迪
The mineral compositions of melt inclusions and fluid melt inclusions in Pegmatites from Ailao Mountain in Yunnan Province and Keketohai sea pegmatite minerals in Xinjiang were measured by electron probe. According to the analysis results of 120 measuring points in 73 inclusions, zinc spinel, corundum, apatite, magnetite, muscovite, biotite, potassium feldspar, albite, beryl and quartz were identified 10 seed minerals, and identified 27 mineral assemblages. Among them, zinc spinel and corundum were found for the first time in the pegmatite melt inclusions of the two regions, and the apatite component belongs to the first determination. The melting of pegmatite and the neutron mineral composition and mineral assemblage of fluid melt inclusions in the two places show that the chemical composition of the inclusions and the main minerals have some evolvement rules and can be used to understand the crystallization differentiation of pegmatite, The basis of the evolution of elements. The study shows that the pegmatite has local magmatic differentiation and the magma is immiscible and inhomogeneous. This result is of great significance for understanding the material composition, formation mechanism and genesis of pegmatite. The magmatic rocks, mantle rocks and meteorites also have some enlightenment