KMS Nanjing Institute of Geology and Palaeonotology,CAS
New constraints on the ages of neoproterozoic glaciations in south China | |
Zhou, CM (周传明); Tucker, R; Xiao, SH; Peng, ZX; Yuan, XL (袁训来); Chen, Z (陈哲) | |
2004-05-01 | |
发表期刊 | GEOLOGY |
ISSN | 0091-7613 |
卷号 | 32期号:5页码:437-440 |
摘要 | The most complete Neoproterozoic successions in south China contain three diamictite intervals in the Changan, Tiesiao, and Nantuo Formations. The youngest and most widespread Nantuo glacial deposit overlies the Datangpo Formation and underlies the fossil-rich Doushantuo Formation. Previous authors have correlated the Nantuo diamictite to either Sturtian or Marinoan glacial deposits elsewhere. Here we report sedimentary and delta(13)C chemostratigraphic data of the Doushantuo cap dolostone, which overlies the Nantuo Formation. Facies-dependent variation in delta(13)C is interpreted as evidence for spatial heterogeneity in delta(13)C and/or temporal diachroneity in the initiation of cap carbonate sedimentation. Sedimentary and chemostratigraphic data are indicative of a Marinoan age for the Nantuo glaciation. This inference is supported by a new U-Pb zircon age of 663 +/- 4 Ma from a tuffaceous bed in the Datangpo Formation. The new date and other isotopic ages from south China constrain the age of the Changan and Tiesiao glaciation(s) as between 761 +/- 8 Ma and 663 +/- 4 Ma, and the Nantuo glaciation as between 663 +/- 4 Ma and 599 +/- 4 Ma. |
关键词 | U-pb Geochronology Neoproterozoic South China Glaciation Carbon Isotopes |
DOI | 10.1130/G20286.1 |
语种 | 英语 |
关键词[WOS] | Snowball Earth ; Cap Carbonates ; Geochronology ; Supergroup ; Isotopes ; History ; Rodinia |
WOS研究方向 | Geology |
WOS类目 | Geology |
WOS记录号 | WOS:000221051300019 |
出版者 | GEOLOGICAL SOC AMERICA, INC |
文献类型 | 期刊论文 |
条目标识符 | http://ir.nigpas.ac.cn/handle/332004/1040 |
专题 | 中国科学院南京地质古生物研究所 其他 |
通讯作者 | Xiao, SH |
作者单位 | 1.Virginia Polytech Inst & State Univ, Dept Geosci, Blacksburg, VA 24061 USA 2.Washington Univ, Dept Earth & Planetary Sci, St Louis, MO 63130 USA 3.Nanjing Inst Geol & Paleontol, Nanjing 210008, Peoples R China |
推荐引用方式 GB/T 7714 | Zhou, CM ,Tucker, R,Xiao, SH,et al. New constraints on the ages of neoproterozoic glaciations in south China[J]. GEOLOGY,2004,32(5):437-440. |
APA | Zhou, CM ,Tucker, R,Xiao, SH,Peng, ZX,Yuan, XL ,&Chen, Z .(2004).New constraints on the ages of neoproterozoic glaciations in south China.GEOLOGY,32(5),437-440. |
MLA | Zhou, CM ,et al."New constraints on the ages of neoproterozoic glaciations in south China".GEOLOGY 32.5(2004):437-440. |
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