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Cyclic cold climate during the Nantuo Glaciation: Evidence from the Cryogenian Nantuo Formation in the Yangtze Block, South China
Lang, Xianguo (郎咸国)1,2,3,4; Chen, Jitao (陈吉涛)1,2; Cui, Huan5,6; Man, Ling7,8; Huang, Kang-Jun9; Fu, Yong10; Zhou, Chumming (周传明)1,2; Shen, Bing3,4
2018-06
Source PublicationPRECAMBRIAN RESEARCH
ISSN0301-9268
Volume310Pages:243-255
Abstract

Geological and paleomagnetic data indicate that the ice sheets might have extended to low-latitude regions in the Cryogenian (720-635 Ma). The 'snowball Earth' hypothesis proposed that the Earth was completely ice-covered during global glaciation. However, the glacial sedimentary record seems to contradict with the snowball Earth hypothesis. Detailed sedimentological investigations of the glacial deposits would provide the first-order constraint on the nature of global glaciation. The Nantuo Formation (similar to 654-635 Ma) in the Yangtze Block of South China has been correlated with the Marinoan snowball Earth. In this study, we conducted systematic sedimentological analyses of six sections/cores of the Nantuo Formation. Three facies associations were recognized: the proximal glaciomarine, distal glaciomarine, and non-glacial marine facies associations. The vertical stacking pattern of facies associations can be correlated among the five slope and basin sections, while their correlation with the shelf section remains obscure. Our data indicate two episodes of glaciation that are separated by an interglacial interval during the Nantuo Glaciation. The first glacial episode is recorded by successions of coarse-grained facies (e.g., massive diamictite) in the lower part of the Nantuo Formation. The re-appearance of massive diamictite in the middle to upper part of the Nantuo Formation indicates onset of the second glacial episode. These two glacial episodes were separated by a siltstone/shale sequence of several 10 s m thick, suggesting an interglacial period with limited influence from glaciation. The top of Nantuo Formation consists of alternative distal-glaciomarine and non-glacial marine facies associations, representing the deglacial sequence of the Nantuo Glaciation. The sedimentary facies analysis indicates that the cold climate during the Nantuo Glaciation may be cyclic. Finally, our sedimentary analysis confirms a lag between the deglaciation and precipitation of cap carbonate.

KeywordIce Sheets Glacial Cycle Snowball Earth Cryogenian Neoproterozoic
DOI10.1016/j.precamres.2018.03.004
Indexed BySCI
Language英语
WOS Research AreaGeology
WOS SubjectGeosciences, Multidisciplinary
WOS IDWOS:000436218200015
PublisherELSEVIER SCIENCE BV
Citation statistics
Document Type期刊论文
Identifierhttp://ir.nigpas.ac.cn/handle/332004/22635
Collection中国科学院南京地质古生物研究所
其他
Affiliation1.Chinese Acad Sci, Nanjing Inst Geol & Palaeontol, CAS Key Lab Econ Stratig & Palaeogeog, Nanjing 210008, Peoples R China;
2.Chinese Acad Sci, Ctr Excellence Life & Paleoenvironm, Nanjing 210008, Peoples R China;
3.Peking Univ, Key Lab Orogen Belts & Crustal Evolut, MOE, Beijing 100871, Peoples R China;
4.Peking Univ, Sch Earth & Space Sci, Beijing 100871, Peoples R China;
5.Univ Wisconsin Madison, NASA, Astrobiol Inst, Madison, WI 53706 USA;
6.Univ Wisconsin Madison, Dept Geosci, Madison, WI 53706 USA;
7.Chengdu Univ Technol, Inst Sedimentary Geol, Chengdu 610059, Sichuan, Peoples R China;
8.PetroChina, Explorat & Dev Res Inst, Southwest Oil & Gasfield Co, Chengdu 610051, Sichuan, Peoples R China;
9.Northwest Univ, Dept Geol, Xian 710069, Peoples R China;
10.Guizhou Univ, Coll Resource & Environm Engn, Guiyang 550025, Guizhou, Peoples R China
Recommended Citation
GB/T 7714
Lang, Xianguo ,Chen, Jitao ,Cui, Huan,et al. Cyclic cold climate during the Nantuo Glaciation: Evidence from the Cryogenian Nantuo Formation in the Yangtze Block, South China[J]. PRECAMBRIAN RESEARCH,2018,310:243-255.
APA Lang, Xianguo .,Chen, Jitao .,Cui, Huan.,Man, Ling.,Huang, Kang-Jun.,...&Shen, Bing.(2018).Cyclic cold climate during the Nantuo Glaciation: Evidence from the Cryogenian Nantuo Formation in the Yangtze Block, South China.PRECAMBRIAN RESEARCH,310,243-255.
MLA Lang, Xianguo ,et al."Cyclic cold climate during the Nantuo Glaciation: Evidence from the Cryogenian Nantuo Formation in the Yangtze Block, South China".PRECAMBRIAN RESEARCH 310(2018):243-255.
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