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前言我国东部中生代火山岩系地层非常发育,随着我国科学技术的发展,对广泛分布的火山岩系地层进行了深入的研究。在地层、古生物、岩石、大地构造、同位素地质等方面都已取得了大量资料,为火山岩系地层时代的确定、划分和对比提供了有力的依据,这不仅在理论上有重大意义,而且有很大实际价值。自1973年以来,我们对宁芜、庐枞地区作了系统的年代学工作,并对测定得到的部分年龄数据作过报道,同时对长江中下游其它几个火山岩盆地,浙江、福建以及冀北、辽西等地区的中生代火山岩系,进行了剖面观察和年龄测定工作。下面就同位素地质年龄测定和研究,来讨论这套火山岩系地层的时代。
Preface The Mesozoic volcanic strata in eastern China are very developed. With the development of science and technology in our country, the widespread volcanic strata have been deeply studied. In the strata, paleontology, rock, geotectonic, isotopic geology and other aspects have made a lot of information, for the determination of the volcanic stratigraphic age, provide a strong basis for the comparison and comparison, which is not only of great theoretical significance, but also very Big real value. Since 1973, we have systematically chronologically studied Ningwu and Luzong areas and reported some of the measured age data. In the meantime, we have also reported on several other volcanic basins in the middle and lower reaches of the Yangtze River, Zhejiang, Fujian and Hebei , Western Liaoning and other regions of the Mesozoic volcanic rock series, conducted a cross-section observation and determination of age. The following isotope geology age determination and research to discuss this volcanic rock strata era.