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岩体同位素年龄和空间展布分析表明，中生代岩浆活动受多期活动的深大断裂控制且具有多阶段和多期次演化特征。根据Ｘ射线衍射分析、包体测温、热液矿点的分布以及煤质参数等特征可以证明，除了深成变质作用外，岩浆热变质作用是该区主要的煤变质作用类型。岩浆热变质作用可进一步划分为区域岩浆热变质作用和接触变质作用。通过对湖南的煤类、岩浆活动、构造特征及地球物理特征的比较，可划分出４个煤变质区，其变质程度自北西向南东逐渐增高，这是中、新生代太平洋板块与欧亚板块长期相互作用的结果
The analysis of age and spatial distribution of rock mass isotopes shows that the Mesozoic magmatic activity is controlled by deep faults with multi-stage activity and has multi-stage and multi-stage evolution characteristics. According to the X-ray diffraction analysis, the temperature of inclusions, the distribution of hydrothermal ore deposits and the parameters of coal quality can prove that the metamorphism of magma is the main coal metamorphism in this area except for the metamorphism. Magmatic thermal metamorphism can be further divided into the regional magmatic thermal metamorphism and contact metamorphism. By comparing coal and magmatic activities, tectonic features and geophysical characteristics of Hunan Province, four coal metamorphic zones can be identified, and their metamorphic degree gradually increases from northwest to southeast. This is the result of the comparison between the Meso-Cenozoic Pacific plate and Eurasian Long-term interaction between the plate results