| 湖南中生代岩浆活动与晚二叠世煤变质特征 |
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| 引用本文： | 周春光,龚玉红.湖南中生代岩浆活动与晚二叠世煤变质特征[J].现代地质,1996,10(4):470-477. |
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| 作者姓名： | 周春光 龚玉红 |
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| 作者单位： | [1]能源系 [2]湖南煤田地质局 |
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| 摘 要： | 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
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| 关 键 词： | 岩浆热变质作用 煤变质区 深大断裂 包裹体 热液矿点 湖南省 |
MESOZOIC MAGMATIC ACTIVITIES AND METAMOR PHIC CHARACTERISTICS OF UPPER PERMIAN COAL IN HUNAN PROVINCE |
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| Abstract: | The analyses of isotope age and spatial distribution of magmatic intrusions in Hunan Province show that Mesozoic magmatic activities are characterized by multistage and multiperiod evolution and controlled by the deep faults with multiperiod activities. According to a series of characteristics, such as X diffraction data, temperature test of inclusions, distribution of hydrothermal ore spots and coal quality parameters, it can be proved that magmatic thermal metamorphism which can be divided into telemagmatic metamorphism and contact metamorphism is a main metamorphic type of coal besides geothermal metamorphism. Through the comparative study of coal type, magmatic activity, structural feature and geophisical character, four coal metamorphic zones in Hunan Province are recognized, in which the coal rank gradually increases from the northwest to the southeast. It is a long term interaction of Pacific plate and Eurasia plate in Mesozoic and Cenozoic. That results in the formation of the distribution pattern of coal metamorphism in this area. |
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| Keywords: | magmatic thermal metamorphism coal metamorphic zone deep fault inclusion hydrothermal ore spot Hunan Province |
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