By the known data of isotope age determination, Nanhuaian time-structure frame was principally set up with the top boundary about 700 Ma and bottom about 800 Ma.
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- 综合已有同位素测年数据,初步建立起南华纪年代构造格架,确立南华纪底界年龄为800 Ma左右,顶界年龄为700 Ma左右。