辽宁南华系的划分及其特征

摘要

The Nanhau System, previously known as Hanhua Ice Age, is characterized by the broad occurrence of glacial actions. However, the glacial sedimentation has not found yet in the Nanhua System in Liaoning Province. In contrast, numerous macro algae fossils are developed in the Nanhua System in Liaoning, showing a warm and humid condition of ancient climate. The Pre-Cambrian glacial activities in the rest of the world occurred all in the regions with low paleolatitude. According to the paleomagnetic data, the Nanhua System in Liaoning is distributed in the areas with medium and high paleolatitude. Therefore, the Nanhua System in Liaoning would not produce glacial rock. The "warm type Nanhua System" is developed in Liaoning. This conclusion will provide a new idea for the division and correlation of the Nanhua System in China.%南华系以冰川活动的广泛出现为其特征,始称“南华大冰期”,但辽宁南华系中迄今尚未发现冰成岩沉积.相反,辽宁南华系却发育大量的宏观藻类化石,反映出当时温暖潮湿的古气候条件.世界各地前寒武纪晚期冰川活动,均出现于低古纬度位置.根据古地磁资料,辽宁南华系分布于中、高古纬度位置.因此,辽宁南华系不会发育冰成岩.辽宁发育“温暖型南华系”,这将对全国的南华系划分对比提供新的研究思路.