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Journal of Earth Science 2015年第2期26卷 211-218页

作者： Hao Yu hengye wei Key Laboratory of Orogenic Belts and Crustal Evolution MOE Peking University College of Earth Sciences East China Institute of Technology

The Late Paleozoic Ice Age across Carboniferous and Permian had a significant impact on the Kungurian （Upper Cisuralian series of Permian） Chihsia Formation in South China. This re- suited in a unique interval with features such as the lack of reef in Chihsian limestone, widespread stinkstone and nodular/bedded chert. The Chihsia limestone （Kungurian stage） deposited during a time of cooling was resulted from oceanic upwelling. Here we present evidence for this upwelling using sev- eral geochemical analyses： bulk organic carbon isotope, biomarker molecular geochemical data, and authigenic silica of the stinkstone member in the lower Chihsia Formation of the Kuangurian stage from the Enshi Section in western Hubei Province, South China. The lower part of the stinkstone member shows a rapid organic carbon isotope excursion with a -3%o shift triggered by the upwelling of 13C-depleted bottom water. The concurrent rapid increasing of authigenic silica content resulted from the enhanced supply of dissolved silica in the upwelling water mass. This upwelling at the Enshi Section also led to relative high TOC content, accounting for the widespread stinkstone in the lower Chihsia Formation during the Kungurian stage in Permian.

关键词： Chihsia Formation Enshi Section organic carbon isotope authigenic silica upwelling.

Guadalupian(Middle Permian)δ^13Corg changes in the Lower Yangtze,South China

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Acta Geochimica 2020年第6期39卷 988-1001页

作者： hengye wei Ziao Geng Xuan Zhang School of Geoscience and Technology Southwest Petroleum UniversityChengdu 610500China School of Earth Science East China University of TechnologyNanchang 330013China

The Middle Permian Guadalupian witnessed significant environmental changes in the Phanerozoic such as large-scale sea-level drop,supercontinent Pangaea assembly,and transition from Early Permian glaciation to Late Permian non-glacial *** tracers can provide insights for these environmental ***δ^13C studies of the entire Guadalupian epoch are rare,and most of them has focused on near the end of Guadalupian and carb on isotopes of ino ***,we present carbon isotopic compositions of organic matters in the Guadalupian from two sections(Chaohu and Xiaolao)in the Lower Yangtze *** *** results show that 313Corg profiles in the Guadalupian show a peak in the Roadian and a gradual negative shift from the Roadian to the middle *** trends can be matched by(δ^13C changes of carbonate rocks or organic matter in South China and other places in the world,representi ng a global carb on cycle *** Roadian positive peak was probably due to high productivity which was caused by upwelling during cooling *** gradual negative shift of(δ^13C was caused mainly by a decrease of organic matter burial on land and in the ocean,resulting from global sea-level drop and anoxia-caused benthos decline,*** less important causes for the gradualδ^13C negative shift are volcanic-gases releasing,decreased mountain belts,and the resultant reduced silicate weathering-consumption of *** gradual negative shift ofδ^13C coincides with the gradual extinction in the ***,global sea-level drop and marine reducing conditions may be the main causes of the gradual extinction in the Guadalupian.

关键词： Organic-carbon isotope Carbon cycle Mass extinction Kuhfeng Formation Chaohu Xiaolao

End-Guadalupian mass extinction and negative carbon isotope excursion at Xiaojiaba,Guangyuan,Sichuan

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Science China Earth Sciences 2012年第9期55卷 1480-1488页

作者： wei hengye CHEN DaiZhao YU Hao WANG JianGuo Key Laboratory of Petroleum Resources Research Institute of Geology and GeophysicsChinese Academy of ScienceBeijing 100029China Graduate University of Chinese Academy of Sciences Beijing 100049China

The end-Paleozoic biotic crisis is characterized by two-phase mass extinctions;the first strike,resulting in a large decline of sessile benthos in shallow marine environments,occurred at the end-Guadalupian *** order to explore the mechanism of organisms' demise,detailed analyses of depositional facies,fossil record,and carbonate carbon isotopic variations were carried out on a Maokou-Wujiaping boundary succession in northwestern Sichuan,SW *** data reveal a negative carbon isotopic excursion across the boundary;the gradual excursion with relatively low amplitude(2.15‰) favors a long-term influx of isotopically light 12 C sourced by the Emeishan basalt trap,rather than by rapid releasing of gas *** temporal coincidence of the beginning of accelerated negative carbon isotopic excursion with onsets of sea-level fall and massive biotic demise suggests a cause-effect link between *** volcanic activity of the Emeishan trap and sea-level fall could have resulted in detrimental environmental stresses and habitat loss for organisms,particularly for those benthic dwellers,leading to their subsequent massive extinction.

关键词： mass extinction Emeishan trap sea-level fall carbon cycle end-Guadalupian Guangyuan SW China

The origin of bedding-parallel fibrous calcite veins in the Lower Permian Chihsia Formation in western Hubei Province,South China

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Science Bulletin 2015年第20期60卷 1778-1786页

作者： Hao Yu Xiqiang Zhou Jianguo Wang Chuan Guo hengye wei Daizhao Chen Key Laboratory of Orogenic Belts and Crustal Evolution Ministry of Education Peking University Key Laboratory of Petroleum Resources Research Institute of Geology and Geophysics Chinese Academy of Sciences College of Earth Science East China Institute of Technology

Bedding-parallel fibrous veins occurring as lenticular to flattened intercalations were found in the organic-rich marlstone/calcareous shale of the upper Lower Permian Chihsia Formation in western Hubei Province, South China. They dominantly consist of fibrous calcite crystals with smooth and tight boundaries, forming fence- like inward, syntaxial growth clusters toward the vein center along which a median suture line generally occurs. Petrographic evidence indicates that these veins may form at relatively shallow burial depth, where fluid overpres- sures would have incrementally created the bed-parallel vein space, resulting in displacive growth of fibrous calcite. On the other hand, the C, O and S isotopic data across the vein reveal slightly depleted δ13Ccarb values （-3.32 ‰ to ＋0.19‰ VPDB） and moderately depleted δSOcarb values （--9.6 ‰ to --7.3 ‰ VPDB） with respect to those of coeval seawaters and slightly heavier δ34Spyrite values （--7.88 ‰ CDT） with respect to those of ambient rocks. Stable isotope evidence consistently suggests significant contribution of bacterial sulfate reduction （BSR） to the formation of the fibrous calcite cements in the vein. The BSR could have been intensive with the availabilities of residual sulfate and abundant organic matters in the Chihsia sediments during shallow burial, increasing the alkalinity of pore waters and further promoting carbonate precipitation. Thus, the bedding-parallel fibrous calcite vein in the upper Lower Permian Chihsia Formation is an important time-specific petrographic capsule, providing clues for understanding the diagenetic process in organic- rich sediments.

关键词： Fibrous calcite vein C-O-S isotope Diagenesis Chihsia Formation

A Toarcian Ocean Anoxic Event record from an open-ocean setting in the eastern Tethys: Implications for global climatic change and regional environmental perturbation

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Science China Earth Sciences 2021年第11期64卷 1860-1872页

作者： Xiugen FU Jian WANG Huaguo WEN Chunyan SONG Zhongwei WANG Shengqiang ZENG Xinglei FENG hengye wei State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation Southwest Petroleum UniversityChengdu 610050China School of Geoscience and Technology Southwest Petroleum UniversityChengdu 610500China Institute of Sedimentary Geology Chengdu University of TechnologyChengdu 610059China Chengdu Center China Geological SurveyChengdu 610081China Qiangtang Institute of Sedimentary Basin Southwest Petroleum UniversityChengdu 610500China

The Early Toarcian“Oceanic Anoxic Event”(T-OAE)is recorded by marked disruption to both the climate system and marine ***,we present intergraded high-resolution carbon-isotope data(δ^(13)C),bulk geochemistry,mineral characterization from an open-ocean setting in the eastern *** these data,we(1)construct the high-resolution record of the T-OAE from an open-ocean setting in the eastern Tethys;(2)show that the T-OAE in the Sewa succession was marked by coarser-grained deposits associated with high-energy conditions within the otherwise low-energy claystone deposits that likely linked to a globally increased supply of clastic sediments into marginal and deeper marine basin;(3)propose that the low C_(org):P_(total) ratios,in combination with bioturbated structure and depletion or slight enrichment in redox-sensitive trace elements of V,Mo,and U suggest a long-term oxygenation event throughout the T-OAE interval at the Sewa succession,and hence,anoxia may not play a fundamental role during the Toarcian negative CIE in this setting;(4)exhibit that a warming and more humid climate began at the start of the T-OAE,and many episodic changes in sediment provenance throughout the T-OAE interval occurred at this location;and(5)suggest that accumulation of organic-matter sediments during the T-OAE is generally controlled by global climatic changes,but a regional environmental perturbation also might influence the preservation of organic matter.

关键词： Toarcian Oceanic Anoxic Event Carbonate carbon isotopes Shallow marine Oxygen-rich conditions Eastern Tethys

End-Guadalupian mass extinction and negative carbon isotope excursion at Xiaojiaba,Guangyuan,Sichuan

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End-Guadalupian mass extinction and negative carbon isotope ...

湖北秭归吴家坪组—长兴组界线氧化还原条件及其意义

中国科学院地质与地球物理研究所2012年度（第12届）学术年会

作者： wei hengye CHEN DaiZhao YU Hao WANG JianGuo Key Laboratory of Petroleum Resources Research Institute of Geology and GeophysicsChinese Academy of Science Graduate University of Chinese Academy of Sciences

The end-Paleozoic biotic crisis is characterized by two-phase mass extinctions;the first strike,resulting in a large decline of sessile benthos in shallow marine environments,occurred at the end-Guadalupian *** order to explore the mechanism of organisms’ demise,detailed analyses of depositional facies,fossil record,and carbonate carbon isotopic variations were carried out on a Maokou-Wujiapmg boundary succession in northwestern Sichuan,SW *** data reveal a negative carbon isotopic excursion across the boundary,the gradual excursion with relatively low amplitude(2.15‰) favors a long-term influx of isotopically light C sourced by the Emeishan basalt trap,rather than by rapid releasing of gas *** temporal coincidence of the beginning of accelerated negative carbon isotopic excursion with onsets of sea-level fall and massive biotic demise suggests a cause-effect link between *** volcanic activity of the Emeishan trap and sea-level fall could have resulted in detrimental environmental stresses and habitat loss for organisms,particularly for those benthic dwellers,leading to their subsequent massive extinction.

关键词： mass extinction Emeishan trap sea-level fall carbon cycle end-Guadalupian Guangyuan SW China

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沉积学报 2020年第3期38卷 476-484页

作者：张璇韦恒叶东华理工大学地球科学学院南昌330013

二叠纪发生了两次重大生物灭绝事件,一次是位于吴家坪初期即瓜德鲁普世末生物灭绝事件,另一次是位于长兴末期即晚二叠世末生物灭绝事件。在这两次生物灭绝事件之间的大约八百万年时间里,其环境变化研究相对较少,古海洋的氧化还原条件变... 详细信息

二叠纪发生了两次重大生物灭绝事件,一次是位于吴家坪初期即瓜德鲁普世末生物灭绝事件,另一次是位于长兴末期即晚二叠世末生物灭绝事件。在这两次生物灭绝事件之间的大约八百万年时间里,其环境变化研究相对较少,古海洋的氧化还原条件变化目前尚未清楚。通过分析湖北秭归县杨林剖面的黄铁矿形态来探讨吴家坪组—长兴组界线氧化还原条件及其意义。研究结果表明:吴家坪组与长兴组石灰岩沉积时期的古海水主要是贫氧至氧化环境。在吴家坪组上部至长兴组下部地层沉积时期古水体出现间歇性硫化现象。该硫化缺氧事件不仅出现在秭归地区,还广泛分布于鄂西盆地、扬子台地南缘南盘江盆地、阿拉伯地台以及东格陵兰盆地地区。这说明吴家坪—长兴组界线沉积时期的间歇性硫化缺氧事件有可能是一个全球性事件。该事件可能与二叠末事件有一定的关联。

关键词：吴家坪组长兴组草莓状黄铁矿氧化还原条件秭归

下扬子中二叠统孤峰组热液硅质岩地球化学约束及其意义

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沉积学报 2024年第3期42卷 799-811页

作者：邹怡韦恒叶西南石油大学地球科学与技术学院成都610500 西南石油大学羌塘盆地研究院成都610500

【目的】下扬子地区中二叠世沉积了一套富含有机质的孤峰组黑色硅质岩,热液硅质岩的分析是该区硅质岩与异常高有机质富集关系研究的关键,进而为该区页岩气勘探提供理论依据。【方法】利用主量、微量和稀土元素地球化学结合岩相学特征分... 详细信息

【目的】下扬子地区中二叠世沉积了一套富含有机质的孤峰组黑色硅质岩,热液硅质岩的分析是该区硅质岩与异常高有机质富集关系研究的关键,进而为该区页岩气勘探提供理论依据。【方法】利用主量、微量和稀土元素地球化学结合岩相学特征分析,安徽铜陵叶山和巢湖平顶山地区孤峰组硅质岩的成因及其构造背景。【结果】巢湖地区孤峰组黑色薄层硅质岩中富含硅质海绵骨针以及放射虫,而铜陵地区孤峰组青灰色硅质岩中几乎不含硅质生物,由微晶石英组成。热液活动指标Al/(Al+Fe+Mn)、Eu/Eu^(*)、Al-Fe-Mn三角图、Lu_(N)/La_(N)比值指示铜陵地区孤峰组青灰色硅质岩为热液成因,巢湖地区孤峰组黑色薄层硅质岩为生物成因。微量和稀土元素La-Th-Sc三角图以及La/Sc与Ti/Zr交会图指示铜陵地区孤峰组沉积期为洋岛弧构造背景,而巢湖地区为陆岛弧和主动大陆边缘背景。【结论】铜陵地区孤峰组硅质岩为原生热液硅质沉积,是斜坡带活跃的构造裂陷活动带来的热液硅酸沉积而成。下扬子地区孤峰组黑色层状硅质岩虽然为生物成因,但其硅的来源与斜坡带的热液活动有关。下扬子地区孤峰组富有机质沉积可能与热液活动带来大量的营养物质造成浮游生物的繁盛有关。

关键词：孤峰组热液活动硅质岩下扬子地区中二叠世有机质富集

Evolution from an anoxic to oxic deep ocean during the Ediacaran-Cambrian transition and implications for bioradiation

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Unconventional Petroleum Sedimentology:A Key to Understanding Unconventional Hydrocarbon Accumulation

中国科学院地质与地球物理研究所2012年度（第12届）学术年会

作者： Jianguo Wang Daizhao Chen Detian Yan hengye wei Lei Xiang Key Laboratory of Petroleum Resources Research Institute of Geology and Geophysics Chinese Academy of Sciences Key Laboratory of Tectonics and Petroleum Resources of Ministry of Education University of Geosciences

The Ediacaran-Cambrian transition,one of the most critical intervals in Earth’s history,is marked by dramatic biological,oceanic and geochemical *** high-resolution carbon and sulfur isoLopic data respectively for organic carbon and pyrite,and iron speciation data are presented from the deep-water Liuchapo and Niutitang Formations on the Yangtze *** *** carbon isotopic data,together with biostrat-igraphic and radiometric dating,offer the compelling evidence for the placement of Ediacaran-Cambrian boundary within the Liuchapo Formation(chert succession),and for its correlation with shallow-water equivalents *** this context,iron speciation and sulfur isotopic data further suggest a predominant anoxic and ferruginous deep ocean over the transitional time until the middle Early Cambrian(Atdabanian or Stage 3) when the deep ocean was rapidly ***,during this interval,large-body metazoans (i.e.,sponges) abruptly appeared in the deep ocean,which was temporally associated with the highly diversified large-body skeletonized animals(i.e.,Chengjiang Biota) which colonized in shallow-water niches particularly in southwestern *** scenario suggests a causal link between deep oceanic oxygenation and the explosive diversification of large-body skeletonized organisms in the Early Cambrian.

关键词： Ediacaran-Cambria transition Carbon-sulfur cycling Iron speciation Oceanic anoxia and oxygenation South China

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Engineering 2022年第11期18卷 62-78页

作者： Caineng Zou Zhen Qiu Jiaqiang Zhang Zhiyang Li hengye wei Bei Liu Jianhua Zhao Tian Yang Shifa Zhu Huifei Tao Fengyuan Zhang Yuman Wang Qin Zhang Wen Liu Hanlin Liu Ziqing Feng Dan Liu Jinliang Gao Rong Liu Yifan Li Research Institute of Petroleum Exploration and Development China National Petroleum CorporationBeijing 100083China National Energy Shale Gas Research and Development(Experiment)Center Beijing 100083China State Key Laboratory of Lithospheric Evolution Institute of Geology and GeophysicsChinese Academy of SciencesBeijing 100029China Department of Geology Colorado College Colorado SpringsColoradoCO 80903USA School of Geoscience and Technology Southwest Petroleum UniversityChengdu 610500China Key Laboratory of Tectonics and Petroleum Resources of Ministry of Education China University of GeosciencesWuhan 430074China College of Geosciences China University of PetroleumQingdao 266580China State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation Institute of Sedimentary Geology Chengdu University of TechnologyChengdu 610059China China University of Petroleum Beijing 102249China Oil and Gas Research Center Northwest Institute of Eco-Environment and ResourcesChinese Academy of SciencesLanzhou 730000China College of Earth Sciences Jilin UniversityChangchun 130061China School of Energy Resources China University of Geosciences(Beijing)Beijing 100083China

The commercial exploitation of unconventional petroleum resources(e.g.,shale oil/gas and tight oil/gas)has drastically changed the global energy structure within the past two ***-spot intervals(areas),the most prolific unconventional hydrocarbon resources,generally consist of extraordinarily high organic matter(EHOM)deposits or closely associated sandstones/carbonate *** formation of sweet-spot intervals(areas)is fundamentally controlled by their depositional and subsequent diagenetic settings,which result from the coupled sedimentation of global or regional geological events,such as tectonic activity,sea level(lake level)fluctuations,climate change,bottom water anoxia,volcanic activity,biotic mass extinction or radiation,and gravity flows during a certain geological *** shales with EHOM content and their associated high-quality reservoir rocks deposited by the coupling of major geological events provide not only a prerequisite for massive hydrocarbon generation but also abundant hydrocarbon storage *** Ordovician-Silurian Wufeng-Longmaxi shale of the Sichuan Basin,Devonian Marcellus shale of the Appalachian Basin,Devonian-Carboniferous Bakken Formation of the Williston Basin,and Triassic Yanchang Formation of the Ordos Basin are four typical unconventional hydrocarbon systems selected as case studies *** each case,the formation of sweet-spot intervals for unconventional hydrocarbon resources was controlled by the coupled sedimentation of different global or regional geological events,collectively resulting in a favorable environment for the production,preservation,and accumulation of organic matter,as well as for the generation,migration,accumulation,and exploitation of *** petroleum sedimentology,which focuses on coupled sedimentation during dramatic environmental changes driven by major geological events,is key to improve the understanding of the formation and distribution of sweet-spot intervals(areas)

关键词： Sedimentology Black shales Fine-grained sediments Organic matter accumulation Extraordinarily high organic matter Unconventional petroleum