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Journal of Earth Science 2023年第4期34卷 1176-1188页

作者： Sheng Liu Zhaohui Pan Min Zhu Liantao Jia Wenjin Zhao Key Laboratory of Vertebrate Evolution and Human Origins of Chinese Academy of Sciences Institute of Vertebrate Paleontology and PaleoanthropologyChinese Academy of SciencesBeijing 100044China University of Chinese Academy of Sciences Beijing 100049China CAS Center for Excellence in Life and Paleoenvironment Beijing 100044China

Chahuaqingolepis magniporus *** ***.,a new taxon of Bothriolepididae(Placodermi:Antiarcha),is described from the middle devonian in Luquan County,Yunnan Province,South *** phylogenetic analysis shows that Chahuaqingolepis is the sister group of Wufengshania with the synapomorphy of the large obtected nuchal *** with the findings of other associated antiarchs including Dianolepis,Bothriolepis,and Hunanolepis,the new bothriolepid antiarch is assigned to the Bothriolepis sinensis-Hunanolepis fish assemblage,which characterizes the Eifelian of the middle devonian in South *** fish-bearing Tanglishu Formation can be well correlated with the Tiaomajian Formation in Changsha,Shangshuanghe Formation and lower part of the Haikou Formation in Qujing,and Laohutou Formation in Shaoguan and Lechang *** discovery not only enriches the middle devonian diversity of bothriolepids,but also provides reliable paleoichthyological evidence on the division and correlation of the fish-bearing devonian strata in South China and deepens the understanding of the biogeography of the devonian bothriolepids.

关键词： bothriolepid antiarchs biostratigraphy biogeography middle devonian Luquan Yun-nan.

Genesis and characteristics of the dolomite reservoirs in middle devonian Guanwushan Formation, Northwest Sichuan Basin, SW China

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Petroleum 2020年第2期6卷 138-148页

作者： Ya Zhang Bing Luo Cong Chen Minglong Li Zhimin Jin Shixuan Zhang Yuwei Shen Research Institute of Exploration and Development PetroChina Southwest Oil and Gas Field CompanyChengdu610051China State Key Laboratory of Oil and Gas Reservoir Geology and Exploration Southwest Petroleum UniversityChengdu610500China Southwest Petroleum University Division of Key Laboratory of Carbonate ReservoirsCNPCChengdu610500China

A great breakthrough has been made on oil-gas exploration of the middle devonian Guanwushan Formation in Northwest Sichuan *** further exploration shows that the dolomite reservoir is complicated with insufficient *** the middle devonian Guanwushan Formation as an example,systematic study has been carried out on its reservoir character,mechanism and genesis of *** field and core data suggest that reservoir types of Guanwushan Formation consist of crystalline dolomite,breccia dolomite and reef dolomite,and reservoir space is characterized by intercrystal(dissolution)pores,residual pores among breccias,intragranular dissolution pores,pockets as well as ***,pore structure is of good configuration,showing medium-low porosity and moderate permeability,with average porosity and permeability of 2.23%and 0.44mD respectively,which suggesting fracture-pore and fracture-cavity *** with the previous research,it is suggested that the reservoir of Guanwushan Formation was controlled by facies,dolomitization and two-step karstification,with reef-shoal facies being material base for reservoir development,early dolomitization being key factor for reservoir space preservation,polyphase karstification being foundation for reservoir development and tectogenesis finally finalizing the reservoir.

关键词： Northwest Sichuan Basin middle devonian Guanwushan Formation Dolomitization Genesis of reservoirs

Growth Dynamics of the middle devonian Jukoupu Bioherm,Xinshao, Hunan

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Acta Geologica Sinica(English Edition) 1994年第1期68卷 95-106页

作者： Gong EnpuDepartment of Geology, Northeast U niversity, Shenyang, Liaonmg Department of Geology Northeast University Shenyang Liaoning

The growth process, palaeoecological features and the function of organisms in reef-building of the Jukoupu bioherm in Hunan are discussed in detail. The bioherm is divided into 10 microfacies. Organisms are very abundant in the reef. Thirty-two genera Belonging to 7 phyla have been recognized. They make up 5 communities composed mainly of stromatopoids, Corals and algae, each of which has its own salient ecological features. An analysis of all communities shows that the organic functions are very complex. The same organisms may possess diverse functions simultaneously as the reef growth enters the late stage. The growth process of the reef may involve five stages' (l)biostrome stage, (2) stabilization stage, (3) frame-type reef-building stage, (4) binding and covering-type reef-building stage, and (5) baffle- type reef -building stage.

关键词： Hunan Province middle devonian reef community structure community succession growth process of bioherm

Paleocommunity Replacements of Benthic Brachiopod in the middle-Upper devonian in the Longmenshan Area,Southwestern China:Responses to Sea Level Fluctuations

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Acta Geologica Sinica(English Edition) 2005年第3期79卷 313-324页

作者： CHENYuanren LIXianghui CollegeofEarthSciences ChengduUniversityofTechnologyChengduSichuan610059 CollegeofEarthSciences ChengduUniversityofTechnologyChengduSichuan610059／／StateKeyLaboratoryofOil-GasReservoirGeologyandExploitationChengduUniversityofTechnologyChengduSichuan610059

Twelve paleocommunities dominated by benthic brachiopod are recognized in the Givetian-Frasnian stages of the devonian in the Longmenshan area, southwestern China, in which two kinds of brachiopod community replacement are classified. One is the abrupt replacement, represented by abrupt alternation between the Leiorhynchus community and Zhonghuacoelia-Striatopugnax community in the Frasnian Tuqiaozi Formation. The other is the gradual one, developed in the Givetian Guanwushan Formation, which had been completed by the shift of the Independatrypa lemma-Uncinulus heterocostellis-Emanuella takwanensis community via the Sinospongophyllum irregulare-Pseudomicroplasma fongi community to the Clathrocoilona spissa-Hexagonaria composite reef community. According to analyses of the paleocommunities, either the abrupt or gradual paleocommunity replacement of the middle-Upper devonian in the Longmenshan area is suggested as a response to the 5th-order sea level fluctuation due to the replacements of the paleocommunities in a tracts-system of depositional sequence. It is supposed that changes of paleocommunity diversity, one of the results of paleocommunity replacement, are depended on the range and magnitude of sea level fluctuation, but there is not a linear relationship between them. Furthermore, a suggestion is proposed that the concept of paleocommunity succession seem to be abandoned in the paleocommunity analysis because it almost never be practiced to recover the information of community succession in the geological record at present.

关键词： community replacement brachiopod benthic paleocommunity sea level fluctuation middle devonian Upper Deovnian Longmenshan Sichuan

The reservoir characteristics research of devonian Jinbaoshi Formation,Northwest Sichuan Basin,SW China

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Petroleum 2022年第3期8卷 332-343页

作者： Shixuan Zhang Xiucheng Tan Hao Tang Cheng Huang Zhimin Jin Minglong Li Yuwei Shen State Key Laboratory of Oil and Gas Reservoir Geology and Exploration Southwest Petroleum UniversityChengdu610500China Southwest Petroleum University Division of Key Laboratory of Carbonate ReservoirsCNPCChengdu610500China

A great breakthrough was achieved on the middle devonian's oil-gas exploration in the Longmenshan area in northwestern ***,only the Guanwushan Formation was researched in *** underlying formation-Jinbaoshi Formation as a set of the potential well reservoir and its reservoir characteristics have not been *** on the section's fine description,thin section analysis,and core borehole logging,combined with petrophysical analysis,the reservoir characteristics,controlling factors,and evolution process of the Jinbaoshi Formation reservoir in the Longmenshan area are deeply studied in this *** results showed that the Jinbaoshi Formation has developed a set of sand-shale interbedding deposit of terrigenous clastic and carbonate *** reservoir lithology is mainly quartz sandstone and calcareous quartz *** quartz sandstone reservoir has good physical properties,but the calcareous quartz sandstone has the characteristics of strong heterogeneity,low porosity,and *** intergranular pores are mainly developed in the reservoir *** the development of intercrystalline pores and intergranular dissolved pores can also be seen,but the development frequency is low,and the scale is *** them,the devonian Jinbaoshi Formation quartz sandstone's average porosity is about 8%,and the highest is 18.43%.The main diagenesis types of the Jinbaoshi Formation are compaction,recrystalization,and *** is the main reason for the destruction of original pores,and dissolution is the main driving force for later porosity and permeability *** fragments,calcareous silty clasts,and bioclastic grains are the main dissolution *** formation of intergranular dissolved pores significantly improves the physical properties of the ***,the reservoir development of the Jinbaoshi Formation is mainly controlled both by favourable sedimentary facies and *** sandstone and ca

关键词： Northwest Sichuan basin middle devonian Jinbaoshi Formation Quartz sandstone Calcareous quartz sandstone Diagenesis Reservoir space

Age of Berh Hairhan Formation of Mongolia dated by conodonts

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Global Geology 2007年第1期10卷 1-5页

作者： Chengyuan WANG Dorjsuren Byambadash Bujinlkham Boujir Jiabin LANG Narzjing Institute of Geology arid Palaeontology Chinese Acadetny of Sciences Nanjing 210008 China Geological Information Center Mineral Resources Authority of Mongolia Ulaanbaatar-13 Mongolia Research Center of Paleontology ＆ Stratigraphy Jilin University Clmngchun 130026 China.

Conodont Caudicriodus angustus angustus （Steward et al. , 1956 ） and Catuticriodus angustus cauda （Wang et al. , 2005） were found from a big limestone lens of the Berh Hairhan Formation in the place of W 150 km to Ulaanbaatar City. The discovery indicates that the Beth Haihan Formation should be assigned to middle devonian Eifelian Stage. This conodont fauna was from a shallow cooler water facies in the relatively high latitude.

关键词： Beth Hairhan Formation conodonts middle devonian Eifelian Stage Mongolia