A new silicified microfossil assemblage from the Ediacaran …

The geological significance of newly discovered microfossils from the Upper Sinian (Doushantuo age) phosphorites. Sci. Geol. Sin., 1 (1986 ... Chen and Wang, 1977. M. Chen, Y. Wang. Note on the tubular metazoan fossils from the Dengying Formation of the upper Sinian System in the Gorge District of the Yangtze River. Kexue Tongbao (Chinese), 22 ...

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A new discovery of macroscopic fossils from the Ediacaran Doushantuo

Two new horizons with macroscopic fossils are reported in the Doushantuo Formation, Ediacaran System, from the Yangtze Gorges area. The fossils were discovered in the lower and middle black shales of the Doushantuo Formation in the new section at Sandouping Town, Zigui County, Hubei Province. The new macroscopic assemblages include Chuaria and …

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Silicified Tubular Microfossils from the Upper Doushantuo Formation

The ediacaran Doushantuo Formation in the Yangtze Gorges area (Fig. 1.2) contains abundant silicified cyanobacterial coccoids and filaments (Y. Zhang et al., 1998), acanthomorphic acritarchs (Zhou ...

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Extreme organic matter enrichment in the Ediacaran Doushantuo formation

The Yangtze Block is a highly prospective area for Ediacaran natural gas exploration in recent years, especially the Doushantuo Formation, a vital source rock for organic-rich hydrocarbon and a shale gas reservoir in the region. However, understanding of the Ediacaran organic-rich source rocks systematically has been limited due to the heterogeneous …

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Permineralized Fossils from the Terminal Proterozoic Doushantuo

Permineralized fossils of the terminal Proterozoic (600–550 Ma) Doushantuo Formation, China, provide an unusually clear window on biological diversity just before the Ediacaran radiation.

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The biostratigraphic succession of acanthomorphic acritarchs of …

These two assemblages, which are found in the lower (Member II) and the upper (Member III) Doushantuo Formation, respectively, ... Gorges area (Lee, 1924), since which time the Yangtze Gorges area has been the type area for the late Precambrian Sinian System. The definition of the Sinian System has been modified several times since it was ...

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Megascopic Symmetrical Metazoans from the Ediacaran Doushantuo

Well-exposed outcrop consists of, in ascending stratigraphic order, the Doushantuo Formation, the Liuchapo Formation and the lower Niutitang Formation (Fig. 2B). The upper Doushantuo Formation is characterized by organic-rich black shale containing abundant macroscopic algae of the Wenghui biota (Zhao et al., 2004; Wang et al., 2008; Tang et al ...

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Stratigraphy and paleogeography of the Ediacaran Doushantuo …

The upper part of the Doushantuo Formation in Yangjiaping section is dominated by grainstones and packstones that are interpreted to have been deposited in a shelf margin …

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Sedimentary lithofacies characteristics and sweet-spot …

The Sinian Doushantuo Formation is the oldest shale gas reservoir discovered in the world, which contains good shale gas shows as the Eyangye-1 and Zidi-1 wells in the Yichang Region of western Hubei province, China. The shales in …

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Phosphatized animal embryos from the Neoproterozoic Doushantuo

Stratigraphy and sedimentary environment of the Upper Sinian Doushantuo Formation in Weng'an phosphorite deposit, Guizhou Province. Journal of Stratigraphy, 22 : 308 – 314 . Google Scholar

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SILICIFIED TUBULAR MICROFOSSILS FROM THE UPPER DOUSHANTUO FORMATION

The Ediacaran Doushantuo Formation in the Yangtze Gorges area (Fig. 1.2) contains abundant silicified cyanobacterial coccoids and filaments (Y. Zhang et al., 1998), acanthomorphic acritarchs (Zhou et al., 2007), multicellular algae (Xiao, 2004), and possible animal embryos (L. Yin et al., 2007).

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Characteristics and formation of sinian (Ediacaran) carbonate …

The Sichuan Basin is a large marine and continental basin in China, with marine carbonate rocks from the Sinian to the Lower Triassic. The Sinian strata in the Sichuan Basin can be divided into Doushantuo Formation (Z 2 do, 700-670 Ma; Wang et al., 2006) and Dengying Formation (Z 2 dn, 670-542 Ma) (Yang, 1994; Mei et al., 2006a, b).The Dengying Formation …

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The diversification and extinction of Doushantuo‐Pertatataka …

At Weng'an, however, such acritarchs first appear—abruptly and in much greater diversity—in phosphorite of the upper Doushantuo Formation, immediately above a subaerial exposure surface. Thus, the biostratigraphic pattern in the East Yangtze Gorges area permits, whereas that at Weng'an apparently disallows, a causal relationship between the ...

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Macroalgal holdfasts and their interaction with environments from …

Numerous macro-organisms of the Doushantuo macrobiota, which were found in the black carbonaceous mudstone of the upper Neoproterozoic Ediacraan Doushantuo Formation in Jiangkou County, Guizhou Province, China, are considered to live on sea floor by their holdfasts. The appearance and preserved forms of the macroalgal holdfasts may provide some data to …

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Sedimentary lithofacies characteristics and sweet-spot interval

The Sinian Doushantuo Formation is the oldest shale gas reservoir discovered in the world, which contains good shale gas shows as the Eyangye-1 and Zidi-1 wells in the …

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Integrated study of the Doushantuo Formation in northwestern …

A negative δ 13 C excursion in the upper Doushantuo Formation in the shelf-margin facies has been correlated with different ... Sedimentary lithofacies characteristics and sweet-spot interval characterization of the Sinian Doushantuo Formation in Upper Yangtze Platform, South China. China Geology, Volume 2, Issue 3, 2019, pp. 261-275.

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Lithofacies paleogeography and exploration …

(1) The sedimentary sequence and stratigraphic distribution of the Sinian Doushantuo Formation in the middle-upper Yangtze region were controlled by paleouplifts and marginal sags.

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Discovery of a Miaohe-type Biota from the Neoproterozoic Doushantuo

On the discovery of Macrofssils algae from the late Sinian in Eastern Yangtze Gorges, south China, Acta Botanica Sinica, 1984, 26(5): 558–560. Google Scholar Chen, M., Xiao, S., Discovery of the macrofossils in the upper Sinian Doushantuo Formation at Miaohe, eastern Yangtze Gorges, Scientia Geological Sinica, 1991, 4: 317–324.

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New material of microfossils from the Ediacaran Doushantuo Formation …

The Zhangcunping area is located at the north limb of the Huangling anticline in Yichang, Hubei Province. Here, the sedimentary succession of the Ediacaran Doushantuo Formation is similar with that in the Weng'an area, Guizhou Province. A large number of new microfossils (mainly acanthoacritarchs) from the Doushantuo Formation in this area are …

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Silicified tubular microfossils from the Upper Doushantuo Formation

The ediacaran Doushantuo Formation in the Yangtze Gorges area (Fig. 1.2) contains abundant silicified cyanobacterial coccoids and filaments (Y. Zhang et al., 1998), acanthomorphic acritarchs (Zhou et al., 2007), multicellular algae (Xiao, 2004), and possible animal embryos (L. Yin et al., 2007).

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Organic Carbon Isotope Geochemistry of the Neoproterozoic Doushantuo

Abstract: The Neoproterozoic Doushantuo Formation on the Yangtze Platform, South China, documents a sedimentary succession with different sedimentary facies from carbonate platform to slope and to deep sea basin, and hosts one of the world-class phosphorite deposits. In these strata, exquisitely preserved fossils have been discovered: the Weng'an biota.

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The biostratigraphic succession of acanthomorphic acritarchs of …

In addition, Yin L et al. (2007) reported 10 species from the upper Doushantuo Formation (Member III), among them 6 species, including Asterocapsoides densus, ... A new assemblage of megafossils—Miaohe biota from Upper Sinian Doushantuo Formation, Yangtze Gorges. Acta Palaeontologica Sinica, 33 (1994), pp. 391-403. View in Scopus Google Scholar.

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Formation and evolution of Upper Sinian to Lower Cambrian

Based on the analysis of welling, logging, seismic information and outcrops, the formation and evolution of Upper Sinian to Lower Cambrian intraplatformal basin (IPB) in Sichuan Basin was studied ...

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The Weng'an Biota (Doushantuo Formation): an Ediacaran …

The Weng'an Biota occurs within the Ediacaran Doushantuo Formation (551 – 635 Ma, Condon et al. 2005) of south China ().In addition to the phosphatized microfossils from Weng'an, this formation has yielded silicified microfossils (Yin et al. 2004) and macrofossils that are preserved as 2D carbonaceous compressions including macro-algae (Xiao et al. 2002) and the putative …

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(PDF) Ediacaran Acanthomorphic Acritarchs and …

Simplified geological map of China (left) and the Yangtze Gorges area. Acanthomorphs described in this paper were collected from the upper Doushantuo Formation chert nodules at the Wangfenggang ...

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New material of microfossils from the Ediacaran Doushantuo …

A new assemblage of megafossils— Miaohe biota from Upper Sinian Doushantuo Formation, Yangtze Gorges (in Chinese with English abstract). Acta Palaeontol Sin, 1994, 33: …

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Silicified tubular microfossils from the upper Doushantuo Formation

Macroscopic carbonaceous compressions in a terminal Proterozoic shale: A systematic reassessment of the Miaohe biota, South China. Journal of Paleontology, 76:347–376. XUE, Y., T. TANG, AND C. YU. 1992. Discovery of the oldest skeletal fossils from upper Sinian Doushantuo Formation in Weng'an, Guizhou, and its significance.

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Sedimentary characteristics and evolution of the upper Sinian

The lithology of the upper Sinian Doushantuo Formation is characteristic of four different lithofacies, and the thickness of which is different in drilling cores and outcrop sections with ...

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Geological characteristics and resource potential of the Upper Sinian

Compared with the indicators of the main mud shale gas production areas in the USA and China, Upper Sinian Doushantuo Formation mud black shale in the north of Middle Yangtze region has a larger thickness, relatively low organic matter, higher thermal evolution degree, higher brittleness mineral content, lower clay mineral content, lower shale ...

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Geological characteristics and resource potential of the Upper Sinian

In the Late Sinian, Doushantuo Formation, a set of source rocks composed of black shale, dark grayish black micritic limestone and carbon-bearing mudstone, was divided into a second-order sequence ...

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