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近年来在辽西北票四合屯发现了大量的早期鸟类及“长毛”的小型兽脚类恐龙化石层,完美的化石形态表明本区发生过多次非正常生物集群死亡事件。化石层与火山凝灰岩层(或火山灰)密切共生在一起。本文选择了其中四个化石数量巨大的脊椎动物化石层,对其中凝灰岩(或火山灰)中的火山玻璃及斑晶矿物内原生岩浆包裹体的挥发分成分进行了电子探针测定。研究结果表明,与世界相同成分的其它火山相比,本区火山喷出气体的含量较高;火山喷出的各种气体(HCl、HF、H2S、SO2、SO3和H2O蒸汽)的组成比例不同,对应着化石层内脊椎动物化石组合也存在差异。作者认为,火山喷出的气体及火山灰(尘)的综合气候效应是造成本区生物集群死亡的重要原因。
In recent years, a large number of early bird and “long-haired” small ornithological dinosaur fossils have been found in Sihetun, Liaoning Province, in the northwest of Liaoning Province. The perfect fossil morphology indicates that there have been many deaths from abnormal biological colonies in this area. Fossil layer and volcanic tuff layer (or volcanic ash) closely together. In this paper, four fossil vertebrate fossils were selected, and the volatile components in the volcanic glass and plagioclase minerals in tuff (or volcanic ash) were determined by electron probe. The results show that volcanic gas content in this area is higher than that of other volcanoes of the same composition in the world. The compositions of volcanic gases (HCl, HF, H2S, SO2, SO3 and H2O) are different , Corresponding to the fossil vertebrate fossil assemblage there are differences. The author believes that the comprehensive climate effect of volcanic gas and volcanic ash (dust) is the important reason for the death of biological cloning in this area.