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肖钠双晶主要在形变过程中产生,它的结合面是菱形切面。菱形切面的位置既取决于斜长石的化学成分,也取决于它的结构状态。后者本身就是温度的函数。因此,菱切面的位置取决于形变时的温度。在五台山区峨口花岗岩内获得了49个菱切面角温度值。从直方图上可以看出存在有520℃和480℃的两个峰。这温度与围岩的石榴石—黑云母对494—508℃的温度对应。它意味着形变温度与绿片岩相变质温度一致。在五台山区绿片岩相变质时观察到两期形变作用,这与两个温度峰相符。因此,利用菱切面角温度计可以研究形变与变质的关系。
Shaw sodium twins are mainly generated in the deformation process, its binding surface is diamond-shaped section. The location of the rhombic section depends on both the chemical composition of plagioclase and its structural state. The latter itself is a function of temperature. Therefore, the location of the cut surface depends on the temperature of the deformation. In Wutai Mountain Emei granite obtained 49 Ling section angle temperature. It can be seen from the histogram that there are two peaks of 520 ° C and 480 ° C. This temperature corresponds to a temperature of 494-508 ° C for the garnet-biotite surrounding rock. It means that the deformation temperature is consistent with the metamorphism of greenschist facies. Two deformations were observed during the metamorphism of greenschist in Wutai Mountain, which is consistent with the two temperature peaks. Therefore, the use of rhombic angle thermometer can study the relationship between deformation and deterioration.