Timing the termination of the Doushantuo negative carbon isotope excursion: evidence from U-Pb ages from the Dengying and Liuchapo formations, South China | |
Mingzhong Zhou; Taiyi Luo; Warren D. Huff; Zhiqing Yang; Guanghong Zhou; Tian Gan; Hua Yang; Di Zhang | |
2018 | |
发表期刊 | Science Bulletin |
卷号 | 63期号:21页码:1431-1438 |
摘要 | The Doushantuo negative carbon isotope excursion (DOUNCE) is the largest known marine inorganic carbon isotope anomaly. The origin of this pronounced negative excursion is still an enigmatic issue that attracts geologists. Time constraints on the excursion are the critical information that would provide insight into its genesis. In previous decades, the timing of its termination has been constrained by the widely cited zircon U-Pb age of 550.5 +/- 0.8 Ma for the tuff at the top of the Miaohe Member at the Jiuqunao section in the Yangtze Gorges area, South China. However, results of recent studies indicate that the reliability of this time constraint needs to be re-evaluated. Here, a geochronological study was carried out using two K-bentonites from Fanglong in South China. A K-bentonite in the lower Dengying Formation yielded a U-Pb age of 557 +/- 3 Ma, while a K-bentonite in the basal Liuchapo Formation yielded an age of 550 +/- 3 Ma. Based on regional correlations between the Ediacaran successions in South China, the age (557 +/- 3 Ma) for the K-bentonite in the lower Dengying Formation may serve as a second critical timing constraint for the ending of the DOUNCE. Combined with available estimates of the DOUNCE duration, our new data indicate that the DOUNCE has a maximum onset age similar to 570 Ma. |
关键词 | Doushantuo Formation Dengying Formation Shuram Carbon Isotope Excursion South China |
收录类别 | SCI |
语种 | 英语 |
文献类型 | 期刊论文 |
条目标识符 | http://ir.gyig.ac.cn/handle/42920512-1/8929 |
专题 | 矿床地球化学国家重点实验室 |
作者单位 | 1.School of Geographical and Environmental Sciences, Guizhou Normal University, Guiyang 550001, China 2.State Key Laboratory of Ore Deposit Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang 550002, China 3.Department of Geology, University of Cincinnati, Cincinnati, OH 45221, USA 4.Beijing SHRIMP Center, Chinese Academy of Geological Sciences, Beijing 100037, China 5.School of Geography and Tourism, Guizhou Education University, Guiyang 550018, China 6.College of Earth Sciences, University of Chinese Academy of Sciences, Beijing 100049, China |
推荐引用方式 GB/T 7714 | Mingzhong Zhou; Taiyi Luo; Warren D. Huff; Zhiqing Yang; Guanghong Zhou; Tian Gan; Hua Yang; Di Zhang. Timing the termination of the Doushantuo negative carbon isotope excursion: evidence from U-Pb ages from the Dengying and Liuchapo formations, South China[J]. Science Bulletin,2018,63(21):1431-1438. |
APA | Mingzhong Zhou; Taiyi Luo; Warren D. Huff; Zhiqing Yang; Guanghong Zhou; Tian Gan; Hua Yang; Di Zhang.(2018).Timing the termination of the Doushantuo negative carbon isotope excursion: evidence from U-Pb ages from the Dengying and Liuchapo formations, South China.Science Bulletin,63(21),1431-1438. |
MLA | Mingzhong Zhou; Taiyi Luo; Warren D. Huff; Zhiqing Yang; Guanghong Zhou; Tian Gan; Hua Yang; Di Zhang."Timing the termination of the Doushantuo negative carbon isotope excursion: evidence from U-Pb ages from the Dengying and Liuchapo formations, South China".Science Bulletin 63.21(2018):1431-1438. |
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