Early Cambrian ocean anoxia in South China/Wille et al. reply

Here we report a new precise SHRIMP U-Pb zircon age of 532.360.7 million years (Myr) ago (Fig. 1) for a volcanic ash bed in the critical unit that reflects the ocean anoxic event, the lowermost black shale sequence of the Niutitang Formation in the Guizhou Province, South China. [...] the new age da...

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Published inNature (London) Vol. 459; no. 7248; p. E5
Main Authors Jiang, Shao-Yong, Pi, Dao-Hui, Heubeck, Christoph, Frimmel, Hartwig, Liu, Yu-Ping, Deng, Hai-Lin, Ling, Hong-Fei, Yang, Jing-Hong, Wille, Martin, Nägler, Thomas F, Lehmann, Bernd, Schröder, Stefan, Kramers, Jan D
Format Journal Article
LanguageEnglish
Published London Nature Publishing Group 11.06.2009
Subjects
Anoxia
Cambrian
Geochemistry
Geology
Integrated approach
Isotopes
Mineral resources
Nonfiction
Oceans
Shellfish
China
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Summary:Here we report a new precise SHRIMP U-Pb zircon age of 532.360.7 million years (Myr) ago (Fig. 1) for a volcanic ash bed in the critical unit that reflects the ocean anoxic event, the lowermost black shale sequence of the Niutitang Formation in the Guizhou Province, South China. [...] the new age data show that the assumption made by Wille et al.1 that the Mo isotope signals in the sections from Oman and South China are contemporaneous cannot be upheld, hence their global significance must be questioned. Trace- and rare-earth element geochemistry and Pb-Pb dating of black shales and intercalated Ni-Mo-PGE-Au sulfide ores in Lower Cambrian strata, Yangtze Platform, South China.\n If the age of 532.360.7Myr ago inChina can be confirmed, the Mo isotopic signals from Oman and South China would be of diachronous origin.
Bibliography:SourceType-Scholarly Journals-1
ObjectType-Commentary-1
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ISSN:0028-0836
1476-4687