N any of several large crystals that are embedded in a mass of smaller crystals in igneous rocks such as porphyry 斑晶
The groundmass has the same mineral components as phenocryst, and is composed of plagioclase, augite and olivine.
电子探针成分分析显示，基质矿物组成与斑晶矿物组成相同，均是由斜长石、辉石和橄榄石组成；
The results show that the TL signals of pumice and sanidine phenocryst have better thermal-stability, so they can be used for TL dating.
结果表明，浮岩和透长石的TL信号具有良好的热稳定性，适用于TL测年。
Theearly stage comprises fine grain adamellite and medium coarse grained porphyritic adamellite, while the late stage, it consists of medium grain adamellite with huge phenocryst.
晚期由斑状中粗粒二长花岗岩、巨斑状中粒二长花岗岩构成。
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