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南华系(成冰系)底界年龄近年来受到国内外的广泛关注。2013版《中国地层表》(试用稿)上采用的是780Ma。本文根据国内外关于南华系(成冰系)底界年龄的最新研究成果和进展,同时结合780Ma数值的依据进一步做了一些分析和讨论并指出这个数据的问题和不足。南华系(成冰系)底界年龄应该是~720Ma。
The bottom boundary age of the South China System (ice formation system) has drawn wide attention at home and abroad in recent years. 2013 version of “Chinese stratigraphic table” (trial version) is used on the 780Ma. Based on the latest research results and progress on the age of the bottom of the South China System (ice formation system) at home and abroad, this paper further analyzes and discusses the problems based on the 780Ma values and points out the problems and shortcomings of this data. South China Department (ice system) bottom boundary age should be ~ 720Ma.