摘要
吴冲龙的煤变质热动力学方程是一个包含煤层绝对年龄、变质温度和镜质体反射率的数学方程。如果确定煤层绝对年龄和其镜质体反射率,能够计算其理论最低变质温度;如果确定煤层绝对年龄和变质温度,能够计算其理论最大镜质体反射率。定义时温比值来比较延长时间或提高温度对提高煤变质程度的影响以及温度影响显著性。结果表明:在同一个成煤期内,随着镜质体反射率的增加,温度影响显著性下降;在相同的镜质体反射率,随着成煤期的年龄,温度影响显著性也下降。在白垩纪高煤级煤III的R0 = 6.1%时,普通数学方法计算出增加1℃温度的影响相当于延长五百九十万年时间的影响。而高等数学方法计算结果是增加1℃温度的影响相当于延长三百六十七万年时间的影响。
Wu Chonglong’s thermal dynamics equation of coal metamorphism is a mathematical equation containing the absolute age of coal seams, the temperature of coal metamorphism, and the vitri-nite reflectance. If the absolute age of the coal seam and its vitrinite reflectance are determined, the minimum theoretic metamorphism temperature can be calculated. If the absolute age and metamorphism temperature of the coal seam are determined, the maximum theoretic vitrinite reflectance can be calculated. The time-to-temperature ratio has been defined to compare the ef-fect of prolonged time or increased temperature on increasing the degree of coal metamorphism and the significance of temperature effect. The results show that in the same coal-forming period, with the increase of the vitrinite reflectance, the temperature influence decreased significantly, and in the same vitrinite reflectance, with the younger coal-forming period, the temperature influence significance decreased. At the time of the Cretaceous High Coal Grade III R0 = 6.1%, the general mathematical method calculated that the effect of increasing the temperature by 1˚C was equivalent to the effect of an extension of 5.9 million years. The result of the higher mathematical method is that the effect of increasing the temperature by 1˚C is equivalent to the effect of extending the period of 3.67 million years.
出处
《地球科学前沿（汉斯）》
2021年第7期937-946,共10页
Advances in Geosciences
