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The Early Evolution of the Acanthomorphic Acritarchs in China and Their Biostratigraphical Implication

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Acta Geologica Sinica(English Edition) 1996年第2期70卷 193-206,219-220页

作者： yin chongyu and gao linzhi institute of geology, chinese {2. of Geological Sciences,{3. institute of geology Chinese Academy of Geological Sciences Beijing

On the basis of a study of the acanthomorphic acritarchs discovered in the Late Proterozoicto Early Cambrian Meishucunian Stage in different regions of China, especially in southernShaanxi and the Yangtze Platform, coupled with a study of the assemblages, morphological cor-relation, microstructure, and evolutional relations of the acanthorphic acritarchs, as well as awide correlation with those found in different regions of the world, the authors discuss the earlyevolutionary stages of the acanthomorphs, features of their assemblages in various stages, theirbiostratigraphical significance, and their evolutionary trend in China.

关键词： acanthomorphic acritarch Late Proterozoic evolutionary stage biostratigraphy

Microfossils from the Chert in the Lower Cambrian Shuijingtuo Formation at Miaohe, Zigui, Hubei Province

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Acta Geologica Sinica(English Edition) 1993年第2期67卷 223-233,246-247页

作者： yin chongyu, Yue Zhao, {2. {3. institute of geology, CAGS, beijing and Ding Qixiu Hubei Geological institute, Hubei Bureau of geology, Wuhan institute of geology CAGS Beijing China

This paper reports for the first time on the microfossils discovered in the black cherts of the basal part of the Lower Cambrian Shuijingtuo Formation at Miaohe village, Zigui County, Hubei Province, all of which were observed in thin sections. Nine genera, 9 species and 3.indeterminate species (including a new species) are described. According to these microfossils, the conclusion is made that the microfossil zone may be equivalent to the small shelly fossil assemblage zones 2.3.of the Meishucun stage. They have provided another important line of evidence for the correlation of the Sinian-Cambrian boundary strata with those of the adjacent areas.

关键词： the Lower Cambrian the Shuijingtuo Formation chert microfossil the Sinian-Cambrian Boundary

The microfossils in phosphate deposit in Doushantuo stage, Sinian System, Weng' an, Guizhou Province

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chinese Science Bulletin 2000年第3期45卷 279-284页

作者： chongyu yin {2. {3. institute of geology Chinese Academe of Geological Science Beijing China

The aim of this study is to discuss the microfossils in phosphate deposit in the Doushantuo stage, Sinian System, weng’an, Guizhou Province. Based on the detailed observation in morphology and microstructures, it is considered that those acritarchs with interior spicules probably belong to sponge animals. However, some explanations for a part of soft-tissue are stili contrioversial. The reliable conciusion stili needs more evidence to study. The scientific significance of this study and the key questions for further studies are suggested here.

关键词： Doushantuo stage phosphate acritarchs sponge animal.

Discovery of phosphatized gastrula fossils from the Dou-shantuo Formation,Weng'an,Guizhou Province,China

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chinese Science Bulletin 2001年第20期46卷 1713-1716页

作者： yin chongyu Yue Zhao {2. {3. institute of geology Chinese Academy of Geological Sciences Beijing China

Globular fossils from Doushantuo phosphorites at the Weng’an area are for the first time identified as a gas-trulation stage of phosphatized embryos. They are got from the fossiliferous remains after acetic acid maceration. The fossils are found together with formerly reported animal resting eggs and embryos of the earlier cleavage stage. The oblate-shaped fossils with the same size as those reported embryos and invaginate at the middle part into the embryos, show the characteristics of the late blastula to the early gas-trula stage of the embryo development. This discovery convinces the existence of animal embryos at Doushantuo age and offers new facts for the studying of the affinity of related fossils, which are still controversial at present.

关键词： Doushantuo Formation phosphorites gastrulation phosphatization resting eggs embryos.

Qingbaikouan and Crygenian in South China:Constraints by SHRIMP Zircon U-Pb dating

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Acta Geologica Sinica(English Edition) 2013年第6期87卷 1540-1553页

作者： gao linzhi DING Xiaozhong {2. {3. ZHANG Chuanheng Frank R. ETTENSOHN institute of geology Chinese Academy of Geological Sciences China University of Sciences Department of Earth and Environment Sciences University of Kentucky

The Qingbaikouan System is the lowest unit of the Neoproterozoic Erathem in chinese stratigraphic succession,and it now provides a precise geochronological framework and geological time scale for mapping and stratal correlation in ***,a sensitive high-resolution ion microprobe （SHRIMP） U-Pb zircon age date （13.8±12.Ma） obtained from a bentonite in the Qingbaikouan Xiamaling Formation indicates that it belongs to the Mesoproterozoic Erathem *** change is a milestone in understanding the Precambrian Stratigraphic Time Scale in China,and it has had great influence on Precambrian correlations in ***,a large amount of geochronological work has been done in the ＂Jiangnan Orogen Belt＂ of South China,and new isotopic data have redefined the traditional recognition of metamorphosed Mesoproterozoic strata from the Sibao orogeny to the Neoproterozoic *** on SHRIMP zircon U-Pb age data,the authors regard the Sibao orogeny （equal to the Wuling orogeny） as a movement at ca 82. Ma,meaning that the Sibao orogeny was not equivalent to the Grenvillian ***,we report here the first SHRIMP U-Pb age of the boundary between the top of the Qingbaikouan Gongdong Formation （786.8±5.6 Ma） and the bottom of the Chang＇an （diamictite） Formation （778.4±5.2.Ma）,which is the age of the lowest diamictite of the Nanhuan System in China.

关键词： Neoproterozoic Nanhuan System SHRIMP U-Pb Geochronology

A New Diverse Macrofossil Lagersttte from the Uppermost Ediacaran of Southwestern China

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Acta Geologica Sinica(English Edition) 2008年第6期82卷 1095-1103页

作者： TANG Feng yin chongyu LIU Pengju {2. {3. ZHANG Wenyan institute of geology Chinese Academy of Geological Sciences Beijing 100037 Key Laboratory of Stratigraphy and Paleontology Chinese Academy of Geological Sciences Beijing 100037 China Travel Service Head Office Beijing 100081

A new macrofossil Lagerstatte was discovered from the uppermost Ediacaran Jiucheng Member at Jinning and Jiangchuan of the eastern Yunnan, yielding numerous diverse well-preserved thallophyte macrofossils. These include the previously-known representatives of vendobionts, Vendotaenia and Tyrasotaenia, and the biggish multicellular benthos such as Chuaria-like and Tawuia- like fossiis, as well as Longfengshaniaceaens with diverse holdfast structures. There are still some other problematic macrofossils with peculiar configurations as well as uncertain relatives. The distinct dominance of the giant, unbranching thallophytes occasionally with holdfast structures distinguishes this assemblage from the other Ediacaran macrofossil Lagerstattes in the Doushantuo Formation at Miaohe, Wenghui and Lantian, and the contemporary assemblage in the Shibantan Member of Dengying Formation, Yangtze Gorges area. This paper outlines the characteristics of some of the multicellular macrofossils from the Jiucheng Member at Jiangchuan. They include some macrofossils with different types of holdfast structure, larger Chuaria-like and Tawuia-like morphology and questionable affinities as well. The discovery of greater diverse macrofossil assemblages from the Jiucheng Member of eastern Yunnan has further indicated that an important diversification and evolutionary radiation of metaphytes took place in the latest Ediacaran time. This radiation of largescale, benthic metaphyte along with phytoplankton was likely important contributors to the early Cambrian explosion of metazoans.

关键词： eastern Yunnan Late Ediacaran Jiucheng Member diverse macrofossils

Abstracts of Acta Geologica Sinica (chinese Edition)Vol.75, No.2.2.01

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Acta Geologica Sinica(English Edition) 2001年第2期75卷 233-238页

作者： yin chongyu {2. {3. XING Yusheng institute of geology Chinese Academy of Geological Sciences

New Observations on Phosphatized Spheroidal Fossils in Sinian Doushantuoan Phosphorites in Weng’an, Guizhou Province yin chongyu, {2. {3., XING Yusheng institute of geology, chinese academy of Geological Sciences,... 详细信息

关键词： chinese Edition)Vol.75 No.2.2.01 Abstracts of Acta Geologica Sinica

Detrital Zircon Dating of Meso-and Neoproterozoic Rocks in North China and Its Implications

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Acta Geologica Sinica(English Edition) 2011年第2期85卷 271-282页

作者： gao linzhi LIU Pengju {2. {3. ZHANG Chuanheng DING Xiaozhong LIU Yanxue SONG Biao institute of geology Chinese Academy of Geological Sciences Beijing 100037 China China University of Geosciences Beijing 100083 China beijing SHRIMP Center Beijing 100037 China

New dates from Meso- and Neoproterozoic strata contribute to the recently defined Precambrian stratigraphical timescale of China agreed by the Subcommission on the Precambrian System, and the National Commission on Stratigraphy of China on Nov. 2., 2.09. First, the age range of the Changcheng System, including the Changzhougou, Chuanlinggou, Tuanshanzi and Dahongyu formations has been constrained to 1.8-1.6 Ga. Second, the Jixian System including the gaoyuzhuang,Yangzhuang, Wumishan, Hongshuizhuang and Tieling formations has been constrained to 1.6-1.4 ***, an as-yet unnamed （undefined） system （1.4-1.0 Ga） is only developed in the Xiamaling Formation at the Jixian section, Tianjing. Fourth, the Qingbaikou System, including the Luotuoling and Jing＇eryu formations has been constrained to 1.0-0.78 Ga. Fifth, the Nanhuan System ranges between 780-63. Ma, and the Sinian System is within 63.-542.Ma. However, according to a series of SHRIMP U-Pb dates from the late Precambrian in the Jiangnan Orogen Belt in South China Platform, the constrained strata will be redefined as in the upper part of the Qingbaikou System. To aid global geodynamies, it is useful to denote a late Precambrian section with unified, precise and high-precision chronological dating; this is here defined in North China Block and Jiaoliao-Korean Block. However, the Neoproterozoic Qingbaikou study in North China will be influence in whole Meso- and Neoproterozoic in the Jiangnan Orogenic Belt in between the Yangtze Block and the Cathaysia Block in South China.

关键词： Meso- and Neoproterozoic chronostratigraphic sequence tectonic events China

Octoradiate Spiral Organisms in the Ediacaran of South China

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Acta Geologica Sinica(English Edition) 2008年第1期82卷 27-34页

作者： TANG Feng yin chongyu Stefan BENGTSON LIU Pengju WANG Ziqiang {2. {3. institute of geology Chinese Academy of Geological Sciences Beijing 100037 China Key Laboratory of Stratigraphy and Paleontology Chinese Academy of Geological Sciences Beijing 100037 China Department of Palaeozoology Swedish Museum of Natural History Box 50007 SE-10405 Stockholm Sweden School of Earth Sciences and Resources China University of Geosciences Beijing 100083 China

Shales of the Ediacaran Doushantuo Formation of South China contain a new disc-shaped macrofossil, Eoandromeda octobrachiata, characterized by eight spiral arms that were probably housed within an outer membrane. Although the presence of eight radiating structures entails a resemblance to cnidarian octocorals as well as to ctenophores, direct homologies with these extant groups are unlikely. Instead we bring attention to the helicospiral morphology of newly reported embryos from the Doushantuo Formation, suggesting that the long-sought adults of the Ediacaran embryonic metazoans have finally been found.

关键词： Octoradiate spiral organism Eoandromeda octobrachiata Ediacaran South China