Doushantuo formation

geology The geology in the deposit area of the Doushantuo formation was described for the first time in 1924 by JS Lee and YT Chao The formation forms part of the sediments of the End Neoproterozoic Sinian or Sinic system which together with the Pre Sinian overlay the metamorphic archaic and paleoproterozoic basement of the Yangtze Craton in a discordant manner and dip at 10 to 20 ° to

Weng an biota and the Ediacaran radiation of multicellular

As in the Yangtze Gorges area where the Doushantuo Formation was first typified the Doushantuo Formation at Weng an overlies Cryogenian diamictite of the Nantuo Formation and underlies the upper Ediacaran Dengying Formation Fig 3A It is about 40 m thick and can be divided into five units Unit 1 is a 5 10 m thick cap dolostone that is

Origin and age of Mn deposits of the Nantuo Formation in

The Sinian System in the Yangtze region is divided into 3 formations from base to top the Nantuo Formation the Doushantuo Formation and the Dengying Formation The Nantuo Formation comprises 3 members the Lower Tillite Member the Datangpo Member and the Upper Tillite Member The Lower Tillite Member and the Upper Tillite Member consist of

Sinian Dengying Formation

The dominating stratigraphy containing Pb Zn deposits in upper Yangtze platform is the Sinian system in which the Dengying formation and the Doushantuo formation developed

Preliminary discussion on ecological characteristics and

The Miaohe type Biota found from the upper part of the Doushantuo Formation of Sinian at Taoying Town Jiangkou County northeastern Guizhou Province South China includes macroalgal possible metazoan ichnofossil and other is further proved that the macrobiota was distributed widely in seafloor in Yangtze area during the Late Doushantuoian of with the Miaohe type

Ediacaran Wikipedia

The Ediacaran Period / iː d i ˈ æ k ə r ə n / ee dee AK ə rən is a geological period that spans 94 million years from the end of the Cryogenian Period 635 million years ago Mya to the beginning of the Cambrian Period 541 Mya It marks the end of the Proterozoic Eon and the beginning of the Phanerozoic is named after the Ediacara Hills of South Australia

Lithofacies Paleogeography and Exploration Significance of Sinian Doushantuo Depositional Stage in the Middle Upper Yangtze Region Sichuan Basin SW China Petroleum Exploration and Development 46 1 39 51 in Chinese with English abstract

PDF Paleontological Society Permineralized Fossils from

Paleontological Society Permineralized Fossils from the Terminal Proterozoic Doushantuo Formation South China Leiming Yin Shuhai Xiao Yuqing Zhang Andrew Knoll Download PDF Download Full PDF Package This paper A short summary of this paper 37 Full PDFs related to this paper Read Paper Paleontological Society Permineralized Fossils from the Terminal Proterozoic Doushantuo Formation

YSKW198804

Upper Sinian Doushantuo and Dengying Formation The typomorphic study of stibnite from this deposit includes mode of occurrence chemical composi— tion physical properties mineral inclusions and isotopic compositions of sulfur Key words stibnite typomorphic characteristic genesis stratabound antimony ore deposit Hubei Abúact

Lu M et al 2021 Revisiting the Tianjiayuanzi section

The Ediacaran Doushantuo Formation dating from 635 Ma to 551 Ma of South China is composed of alternating siliciclastic and carbonate units and yields abundant extraordinarily preserved animal embryos macroscopic multicellular algae and Ediacara type fossils

Anhuiphyton Wikipedia

Anhuiphyton lineatum is an extinct species of Neoproterozoic algae known from several fossils from the Lantian formation of China first described in 1994 It lived probably more than 580 million years ago The thalli were of spherical to elliptical shape made of thousands of flexible septated filaments The whole organism was a few centimeters in size from to 5 cm at most

Upper Sinian Doushantuo Formation

Upper Sinian Doushantuo Formation Upper Bedoulian Formation Wikipedia The Upper Bedoulian Formation is a geological formation in the Murcia Region Spain whose strata date back to the Early Cretaceous late Barremian to early Aptian stage The marls were deposited in an open marine lower unit 30 metres 98 ft thick is marly with iron concretions and The

Exploration status of the deep Sinian strata in the

 ·  · In the Sichuan Basin there are four sets of high quality source rocks Upper Sinian Doushantuo Formation Lower Cambrian Qiongzhusi Formation Lower Silurian Longmaxi Formation and Upper Permian Longtan Formation where the source rocks with TOC>% reach an area of 10 × 10 4 16 × 10 4 km 2

— Accumulation model of the Sinian

The deposition of organic rich shales in the Sinian Doushantuo Formation and the Cambrian Niutitang Formation were controlled by the rift trough in western Hubei Sweet spots of organic rich shales were mainly formed in the transgressive system tract and the early high water level system tract The long term shallow burial in the Sinian and Triassic around the Huangling paleo uplift provided

A high quality mid Neoproterozoic paleomagnetic pole from

1981 The Doushantuo Formation primarily netic data from the basal Sinian Liantuo muddy dolostone with minor shale and bedded or Formation in South China in order to constrain nodular chert is apparently disconformable upon the paleogeography of Rodinia during its fragmen the Nantuo diamictites when viewed at the regional tation

Ediacaran Wikipedia

Upper boundary definition Appearance of the Ichnofossil Treptichnus pedum Upper boundary GSSP Fortune Head section Newfoundland Canada GSSP ratified 1992 Atmospheric and climatic data; Mean atmospheric O 2 content c 8 vol % 40 % of modern Mean atmospheric CO 2 content c 4500 ppm 16 times pre industrial Mean surface temperature c 17 °C 3 °C above modern The Ediacaran Period

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Macrofossils biota from the upper Sinian Doushantuo Formation in eastern Yangtze Gorges Acta Palaeon tologica Sinica 31 5 513 —a 529 in Chinese with English ab stract Chen M E Xiao Z Z Yuan X L 1994 A new assemblage of megafossils— Miaohe biota from the upper Sinian Doushantuo Formation Yangtze Gorges Acta Palaeontologica Sinica 33 4 319— 403 in Chinese with English

The Sedimentary Evolution from Sinian to Cretaceous in

 · The original life forms which thrived in this period such as Miaohe biota Zhu and Chen 1984; Steiner 1994 have been found in the Upper Doushantuo Formation of Sinian which included Enteromophites Zhu et Chen genmov Enteromophites siniansis Zhu et Chen Chuaria sp Beltanellformis brunsae Longifuniculum dissoltittim Glomulus filamenturn

Manganese carbonate stromatolites of the Ediacaran

29/07/2021 · Lithofacies paleogeography and exploration significance of Sinian Doushantuo depositional stage in the middle upper Yangtze region Sichuan Basin SW China Petroleum Exploration and Development 46 1 41 53

Latest Proterozoic plankton from the Amadeus Basin in

This with a recent report of similar fossils from the upper Sinian of China8 provides a significant new perspective on the history of the algal cysts from the Doushantuo

Inhaltsverzeichnis zu

Doushantuo Formation Source Rocks of the Upper 61 Dengying Formation Source Rocks of the Upper 62 Lower Cambrian Source 62 Upper Ordovician Lower Silurian Source Rocks

U Pb

LA ICP MS U Pb zircon geochronology was carried out for the two tuffs in the upmost Doushantuo Formation and the basal Liuchapo Formation at the Yangtou section Guizhou Province in this study The weighted mean ages of the two tuffs are ± Ma and ± Ma respectively

Doushantuo Formation Wikipedia

Die Doushantuo Formation chinesisch ist eine aus Sedimenten des Ediacariums entstandene Formation in den chinesischen Provinzen westliches Hubei und nordöstliches Guizhou Kreis Weng an Sie ist bekannt für ihre sehr alten und vorzüglich erhaltenen Fossilien mit sehr frühen Metazoa und eventuellen Bilateria

Three dimensional preservation of algae and animal embryos

 · Phosphorites of the late Neoproterozoic 570 ± 20 Myr BP Doushantuo Formation southern China preserve an exceptional record of multicellular

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Porosity characteristics of different lithofacies in marine shale A case study of Neoproterozoic Sinian Doushantuo formation in Yichang area China Journal of Petroleum Science and Engineering 187 106856 32 Yang Rui Jia Aoqi He Sheng Hu Qinghong Sun Mengdi Dong Tian Hou Yuguang Zhou Sandong 2021 Experimental investigation of water

A high quality mid Neoproterozoic paleomagnetic pole from

Formation is the classic Sinian tillite ; it actually 1996 Alternative reconstructions place South spans a range of glacial sedimentary facies China adjacent to the northwest Australian shelf throughout the SCB Wang et al 1981; Liao Kirschvink 1992a We report new paleomag 1981 The Doushantuo Formation primarily netic data from the basal Sinian Liantuo muddy dolostone

Neoproterozoic low paleolatitude glacial successions on

In the Doushantuo Formation an evolution of the carbon isotopic composition from to per mill is discernible The increase in begin{math}δ 13 C in the Doushantuo Formation could be due to an increase in the fractional burial of organic carbon Recent geochemical work suggests that both continents and oceans were completely ice covered in Neoproterozoic time the Snowball Earth

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 the Doushantuo Formation feature considerable thickness 135 m high gas content m 3 /t and high fragile mineral content up to 75% Due to

Lithofacies paleogeography and exploration significance of

 · Sinian was cored completely which shows the Doushantuo Formation has distinct sedimentary characteristics Fig 5 with grey silty dolomite beige micritic dolomite intercalated by argillaceous dolomite and algae striation in local part in the upper part gypsiferous muddy dolomite and white gyp sum in the middle and celadon sandy dolomite dolomite mudstone with siltstone

Interview with Dr Wen Zhou Chengdu University of Technology

23/03/2021 · The lower Sinian Doushantuo formation mudstone Dengying formation the lower Cambrian Qingxudong formation limestone source rock; Qiongzhusi formation the upper Ordovician the lower Silurian Longmaxi formation the lower Permian Longtan formation the upper Triassic Ma antang formation Xiaotangzi formation the third and fifth member of