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；
2
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。
3
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.