Re–Os geochronology of black shales from the Neoproterozoic Doushantuo Formation, Yangtze platform, South China

Carbonaceous biosignatures of diverse chemotrophic microbial communities from chert nodules of the Ediacaran Doushantuo Formation

“…The litho-, bio-and chemo-stratigraphy of the DST has been well characterized with a detailed record of lithological variations, the distribution of fossil groups, profiles of Fe speciation and isotope of d 13 C, d 34 S, d 56 Fe (e.g., Guo et al, 2006;McFadden et al, 2008;Jiang et al, 2010Jiang et al, , 2012Li et al, 2010;Xiao et al, 2012;Fan et al, 2014). The DST was deposited on a passive continental margin of the Yangtze Craton (Li et al, 2010;Jiang et al, 2011 DST is constrained between 635.2 ± 0.6 Ma and 551.1 ± 0.7 Ma on the basis of U-Pb dates of zircons in volcanic ash beds and re-Os geochronology of black shales (Condon et al, 2005;Liu et al, 2009;Zhu et al, 2013). The formation is widely distributed in South China with a number of different sections across depositional environments from the inner shelf (e.g.…”

Rare earth element and Sr–Nd isotope geochemistry of phosphatic rocks in Neoproterozoic Ediacaran Doushantuo Formation in Zhangcunping section from western Hubei Province, South China

“…However, different REE suppliers (McArthur and Walsh, 1984) and diagenetic overprinting (German and Elderfield, 1990;Reynard et al, 1999;Shields and Stille, 2001) may result to a wide variety of the shale-normalized REE patterns in modern and ancient phosphorite deposits (e.g. Trappe, 1998;Jiang et al, 2007;Pi et al, 2013;Zhu et al, 2014), including seawater-like pattern and hat-shaped pattern (Reynard et al, 1999).…”

“…Eu 2+ exists as the common form under reducing conditions, moving into the phosphates and producing positive Eu anomalies. Except the reducing environment, submarine hydrothermal fluid could also cause positive Eu anomaly (Michard et al, 1983;Stalder and Rozendaal, 2004;Jiang et al, 2007;Pi et al, 2013). (Fig.…”

“…Geological map of the Three Gorge area with location of the Zhangcunping Section (AfterZhu et al, 2013). Sketch stratigraphic column of the Zhangcunping Section.Fig.…”

The correlation between macroscopic algae and metazoans in the Ediacaran: a case study on the Wenghui biota in northeastern Guizhou, South China

“…In the Yangtze Gorges area, western Hubei, the ReÀOs age from the black shale at the bottom of the upper Doushantuo Formation (Member IV) is 593 § 17 Ma (Zhu et al 2013), and the UÀPb zircon ages from the top Doushantuo Formation are 551.1 § 0.7 Ma (Condon et al 2005). The Doushantuo Formation in Wenghui and Yangtze Gorges areas are roughly correlatable in macrofossil assemblages and lithology (Wang et al 2007aTang et al 2009;Wang & Wang 2011;Jiang et al 2011).…”