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In recent years, natural gas exploration in the Sinian Dengying Formation and shale gas exploration in Doushantuo Formation have made major breakthroughs in the Sichuan Basin and its...
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The Doushantuo Formation in South China was deposited after the Nantuo glaciation but before the evolution of complex Ediacaran metazoans. It contains multiple taphonomic windows, in its cherts, carbonaceous shales, and phosphorites, onto the late Neoproterozoic biosphere. The phosphatic window is unusually clear; Doushantuo phosphorites at Weng'an (Guizhou …
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In the Sichuan Basin, there are four sets of high-quality source rocks, i.e. Upper Sinian Doushantuo Formation, Lower Cambrian Qiongzhusi Formation, Lower Silurian Longmaxi Formation, and Upper Permian Longtan Formation, where the source rocks with TOC>1.0% reach an area of 10 × 10 4 –16 × 10 4 km 2.
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The Doushantuo Formation contains two prominent δ 13 C features, a negative (–5‰) to positive (up to 2‰) excursion in the Lower Dolomite Member (5, 13) and a pronounced negative (down to –8‰) excursion in the uppermost …
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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 variation ranges from 90 to 250 m. In general,the stratum is thickening along the direction of northwest to southeast. Doushantuo Formation was divided into a ...
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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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Download scientific diagram | Sedimentary system of Doushantuo Formation in mid-upper Yangtze. from publication: Lithofacies paleogeography and exploration significance of Sinian Doushantuo ...
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A new assemblage of megafossils—Miaohe biota from Upper Sinian Doushantuo Formation, Yangtze Gorges. Acta Palaeontologica Sinica, 33(4): 391-403 (in Chinese with English abstract). Chen, M. E., Xiao, Z. Z., 1991. Discovery of the macrofossils in the Upper Sinian Doushantuo Formation at Miaohe, eastern Yangtze Gorges.
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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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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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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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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 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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A new biota composed of the macrofossils in the upper Sinian deposits at Miaohe is de-scribed. None of the earlier reports on metazoan fossils from the Doushantuo Formation is compelling. In our finding, all of the metazoan fossils belongs to worm roughly, but the exact affinity is uncertain. Of them, Niuganmafeia obesa Chen, gen. et sp. nov., Jiuqunaoella sim …
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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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The Doushantuo Formation sequence classification of the Eyangye-1, Zidi-1 and Zidi-2 wells show that the Doushantuo Formation consists of three third-order sequences (i.e. Dsq1, Dsq2 and Dsq3 in Fig. 2, Fig. 3 and Fig. 4, respectively) and each of the third-order sequences consists of a TST and a highstand system tract (HST).The sequence of Dsq1 …
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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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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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The largest negative carbon-isotope excursion in geological history has been reported by several studies of the upper Doushantuo Formation of South China, which has been correlated to the middle Ediacaran-Shuram excursion (SE).
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PDF | On Feb 1, 2015, Yangand 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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Chen M E Xiao Z Z 1991 Discoveryof the macrofossils in the Upper Sinian Doushantuo Formation at Miaohe,Eastern Yangtze GorgesScientia GeologicaSinica(4)317324(in Chinese) 3. Chen M E Lu G Y Xiao Z Z 1994a Preliminary study on the algal macrofossils-Lantianflora from Lantian Formation of Upper Sinian in Southern Anhui ProvinceChinese Academy of ...
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The shale reservoirs of Sinian doushantuo, Cambrian Niutitang, Upper Ordovician Wufeng, and the Lower Silurian Longmaxi Formation shale were evaluated and compared with each other with respect to ...
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1. Stratigraphic characteristics and distribution of Doushantuo Formation The Sinian Doushantuo Formation is widely distributed in the middle-upper Yangtze region, it has different formation names in different areas[5â€"12].
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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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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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Doushantuo Formation (Late Proterozoic) Upper Yangtze Platform ... 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 the Doushantuo Formation feature considerable ...
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In Weng'an, the Doushantuo Formation is composed of five units that have been described in detail by Xiao et al. (2014 b) and Yin et al. (2015). The Weng'an Biota occurs …
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The largest negative carbon-isotope excursion in geological history has been reported by several studies of the upper Doushantuo Formation of South China, which has been correlated to the middle Ediacaran-Shuram excursion (SE). Due to a scarcity of radiometric age constraints on the excursion in South China, however, global correlations and comparisons of this event remain a …
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The Ediacaran Doushantuo Formation (ca. 635–551 Ma) in South China contains exceptionally well-preserved fossils of multicellular eukaryotes including early animals, and it is one of the most intensively investigated Ediacaran units in the world.Various stratigraphic methods including litho-, chemo-, bio-, and sequence-stratigraphy have been applied to …
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Shan Chang'an, Zhang Tingshan, Guo Junjie, et al. Geological characteristics and resource potential of the Upper Sinian Doushantuo Formation shale gas in the north of middleYangtze region[J]. Geology in China, 2015, 42(6): 1944-1958(in Chinese with English abstract).
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