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Ediacaran Acanthomorphic Acritarchs and Other Microfossils …

Silicified microfossils preserved in chert nodules of the Doushantuo Formation in the Yangtze Gorges area of South China have great potential to improve the biostratigraphic subdivision …

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Microfossils from the Upper Sinian (Late Neoproterozoic) Doushantuo

Chert of the Upper Sinian Doushantuo Formation near Changyang, western Hubei, China, contains an exceptionally well-preserved assemblage of spinose, spheroidal, and filamentous microfossils belonging to nineteen species. In this assemblage at least fifteen taxa are recognised to be plankton and only four to be microbenthos. The existing of large acanthomorphic …

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Ediacaran (Sinian) palaeogeographic reconstruction of the Upper …

During deposition of the Doushantuo Formation, the Upper Yangtze area contained a variety of environments, including terrigenous shorefaces, mixed tidal flats, lagoons, shelves, slopes and bathyal ...

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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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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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(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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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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(PDF) Sequence stratigraphic subdivision and correlation of the

PDF | On Feb 1, 2015, Yang AH and others published Sequence stratigraphic subdivision and correlation of the Ediacaran (Sinian) Doushantuo Formation of Yangtze Plate, South China | Find, read and ...

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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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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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Pulsed oxidation and biological evolution in the Ediacaran Doushantuo

The Doushantuo Formation in the Yangtze Gorges area, constrained between 635.2 ± 0.6 and 551.1 ± 0.7 Ma (), is divided into four lithostratigraphic members ().At the Jiulongwan section [supporting information (SI) Fig. 3], member I represents an ≈5-m-thick cap dolostone overlying the Nantuo glacial diamictite and contains a suite of enigmatic …

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Integrated Ediacaran (Sinian) chronostratigraphy of South China

Lithostratigraphically, the shallow platform facies of the Sinian of the Yangtze Block consists of the Doushantuo Formation and the overlying Dengying Formation. The upper part of the Sinian is composed of cherts or silicastones of the deep water facies, and is called the Laobao Formation in northern Guangxi and southeastern Guizhou, the ...

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Research Progress of Ediacaran (Sinian) Biostratigraphy in

The upper Hocosphaeridium anozos-Hocosphaeridium scaberfacium assemblage occurs in the Dou-3 Member of the Doushantuo Formation, and all microfossils of this assemblage are found in the stratigraphic intervals defined by second positive δ 13 C excursion (EP2). By comparison with the lower Tianzhushania spinosa assemblage, acanthomorphic acritarchs of …

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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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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

Chen M E, Xiao Z Z. Macrofossil biota from the Upper Sinian Doushantuo Formation in the eastern Yangtze Gorges, China. Acta Palaeontologica Sinica (in Chinese with English abstract), 1992, 31(5): 513–529. Google Scholar Yuan X L, Xiao S H, Yin L M, et al. Doushantuo Fossils: Life on the Eve of Animal Radiation (in Chinese).

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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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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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Sedimentary sequence and evolutionary characteristics of the rift

Neoproterozoic strata are widely developed in the Upper Yangtze region of South China, among which the Sinian Dengying Formation has been discovered with numerous large gas fields in the Sichuan Basin, and hence they have become an essential domain for natural gas exploration and development.

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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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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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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

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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A new discovery of macroscopic fossils from the Ediacaran …

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. …

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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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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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Lethaia

A fossil assemblage of diverse megascopic benthic algae is well preserved on bedding planes in black siliceous shales of the Neoproterozoic Lantian Formation (upper Sinian) at Lantian village, Xiunng county, Anhui Province, South China. Based on morphological differences, 12 taxa are recognized.

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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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Hydrocarbon accumulation conditions and exploration targets of …

In recent years, a series of significant oil and gas exploration breakthroughs have been achieved in the Sinian Dengying Formation at platform margin of the paleo-uplift in the central Sichuan Basin, leading to the identification of a play with potential to add gas-in-place of trillion cubic meter (Wei et al., 2022).At the same time, exploration breakthroughs were also …

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