• 责任者：Yin Chongyu (Institute of Geology ; Chinese Academy of Geological Sciences ; Beijing 100037 ; China) ; Gao Linzhi
• 刊名：Journal of Stratigraphy
• 出版年：2013
• 卷期：37(4)
• 关键词：南华纪 ; Nanhua Period ; 中国 ; China
• 页码：p.534-541
• 图表：3 illus., 2 tables, 57 refs.
• 分类号：1200
• issnNo：ISSN0253-4959
• isbnNo：CN32-1187/P

     The Nanhuan System examined and adopted in 2000 by the third Chinese Committee of Stratig- raphy, which is a chronostratigraphic unit of system level between the Sinian （Ediacaran） and Qingbaikouan System. Its strata range is the original Lower Series of Sinian, which includes the Neoproterozoic gla- cial deposits. The name of ＂Nanhuan＂ comes from the earliest named ＂South China greater ice age＂ by Mr Liu Hong-yun. In recent years, so many SHRIMP zircon U-Pb ages are obtained from the Nanhuan System in South China and Xinjiang, together with the chemical evidences of the cold climate found from the Liantuo Formation and the equivalent detrital rock, the definition of the Nanhuan lower boundary is determined to appear the first glacial diamictite or the equivalent of the clastic rocks with cold weathering sedi- ments in Neoproterozoic. Based on isotopic ages and chemical stratigraphic date obtained from the Nanhuan System in South China and Xinjiang and the stratigraphic sequences of glaciations or cold events, the Nanhuan System is divided into the Lower, Middle and Upper Series. The time limit of the Lower Series is 725 -780 Ma, the Middle Series is 6604725 Ma and the Upper Series is 635-660 Ma. They respectively correspond to the global Neoproterozoic Kaigas glaciation （≈770-735 Ma）, Sturtian glaciation （≈715-680 Ma）, Marinoan glaciation （≈ 660-635 Ma）. According to the current isotopic age informations, the lower boundary age of the Nanhuan System is determined for 780 Mathe age of upper boundary, corresponding to the lower Sinian boundary is 635 Ma.