河南嵩山地区新元古界何家窑组微亮晶脉特征、成因及地质意义探讨

Microspar Veins in the Neoproterozoic Hejiayao Formation in the Songshan Area, Henan Province

在河南嵩山地区青白口系何家窑组中可识别出一个碳酸盐岩微亮晶脉集中的层位,笔者等结合微亮晶脉自身的特征、成分和伴生的地震引起的其他变形特征,以及通过显微镜和核磁共聚焦显微镜下的微相研究,认为嵩山地区板状微亮晶脉与华北块体东缘胶辽徐淮地区的泥晶脉特征一致,是由地震液化形成的产物,该层位代表了一个地震活跃期。同处华北块体南缘的豫西鲁山和陕西南部相对应的青白口系层位(洛峪口组和巡检司组)也发现了同期的地震记录。笔者认为嵩山地区微亮晶脉的出现应与华北块体南缘构造事件相关联。

This paper studies the horizon with carbonate microspar veins found in the Qingbaikou Hejiayao Formation in the Songshan area, Henan Province. The horizon represents a Neoproterozoic seismic activity period. Contemporaneous earthquake records were also found in the Luoyukou Formation, Lushan, western Henan Province and the Xunjiansi Formation in southern Shaanxi Province. According to the features and compositions of the microspar veins and other deformational features associated with earthquakes, especially micro-facies analysis with the confocal laser scanning microsystem （CLSM）, the authors consider the banded microspar veins in the Songshan area to be the same as those found in the Jiaoliao and Xuhuai areas. The appearance of the microspar veins is related with tectonic events of the southern margin of the North China block.