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利用电子探针、扫描电镜分析技术在产自山东碱性玄武岩的刚玉巨晶中发现了尖晶石族氧化物包体,并有许多刚玉、钛铁矿、高硅氧化物、辉石、长石、方解石等包体。这些包体矿物的化学成分明显与该地区相应的巨晶矿物不同,具有深源性的特征。刚玉巨晶具有世代现象,其生长具有明显的阶段性,是在一种高度演化的富含SiO2岩浆中生成,生长过程极其复杂。
Using electron probe and scanning electron microscopy (SEM), spinel inclusions were found in corundum megacrysts produced from alkaline basalts in Shandong Province. There are many corundum, ilmenite, high silica, pyroxene, Stone, calcite and other inclusions. The chemical composition of these inclusions is obviously different from the corresponding mesogenic minerals in the area and has the characteristics of deep source. Corundum giant crystal has a generation phenomenon, its growth has obvious stage, is generated in a highly evolved SiO2 magma, the growth process is extremely complicated.