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| 1 | End-Guadalupian mass extinction and negative carbon isotope excursion at Xiaojiaba,Guangyuan,Sichuan显示文摘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 time.In 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 China.Our 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 hydrate.The 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 them.Intensive 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. | WEI HengYe CHEN DaiZhao YU Hao WANG JianGuo | 2012 | Science China Earth Sciences2012，55，9： | 5 |
| 2 | The origin of bedding-parallel fibrous calcite veins in the Lower Permian Chihsia Formation in western Hubei Province,South China显示文摘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 fencelike 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 overpressures 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 d13Ccarbvalues(-3.32 % to +0.19 % VPDB) and moderately depleted d18Ocarbvalues(-9.6 % to-7.3 % VPDB) with respect to those of coeval seawaters and slightly heavier d34Spyritevalues(-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 theChihsia 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 organicrich sediments. | Hao Yu Xiqiang Zhou Jianguo Wang Chuan Guo Hengye Wei Daizhao Chen | 2015 | Science Bulletin2015，60，20： | 4 |
| 3 | A Kungurian Oceanic Upwelling on Yangtze Platform: Evidenced by δ^(13) C_(org) and Authigenic Silica in the Lower Chihsia Formation of Enshi Section in South China显示文摘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 resulted 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 several 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‰ 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. | Hao Yu Hengye Wei | 2015 | Journal of Earth Science2015，26，2： | 2 |
| 4 | Environmental controls on marine ecosystem recovery following mass extinctions, with an example from the Early Triassic显示文摘 | Wei Hengye Shen Jun Schoepfer S D | 2015 | Earth-Science Reviews2015，149，： | 1 |
| 5 | Unconventional Petroleum Sedimentology:A Key to Understanding Unconventional Hydrocarbon Accumulation显示文摘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 decades.Sweet-spot intervals(areas),the most prolific unconventional hydrocarbon resources,generally consist of extraordinarily high organic matter(EHOM)deposits or closely associated sandstones/carbonate rocks.The 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 period.Black 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 space.The 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 herein.In 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 hydrocarbons.Unconventional 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)in unconventional petroleum systems. | 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 | 2022 | Engineering2022，，11： | 1 |
| 6 | Organic accumulation in the lower Chihsia Formation (Middle Permian) of South China: Constraints from pyrite morphology and multiple geochemical proxies显示文摘 | Hengye Wei Daizhao Chen Jianguo Wang Hao Yu Maurice E. Tucker | 2012 | Palaeogeography, Palaeoclimatology, Palaeoecology2012，，： | 1 |
| 7 | Etoposide,dexamethasone,and pegaspargase with sandwiched radiotherapy in early-stage natural killer/T-cell lymphoma:A randomized phase III study显示文摘Methotrexate,etoposide,dexamethasone,and pegaspargase(MESA)with sandwiched radiotherapy is known to be effective for early-stage extranodal natural killer/T-cell lymphoma,nasal type(NKTCL).We explored the efficacy and safety of reduced-intensity,non-intravenous etoposide,dexamethasone,and pegaspargase(ESA)with sandwiched radiotherapy.This multicenter,randomized,phase III trial enrolled patients aged between 14 and 70 years with newly diagnosed early-stage nasal NKTCL from 27 centers in China.Patients were randomly assigned(1:1)to receive ESA(pegaspargase 2,500 IU/m^(2)intramuscularly on day 1,etoposide 200 mg orally,and dexamethasone 40 mg orally on days 2–4)or MESA(methotrexate 1 g/m^(2)intravenously on day 1,etoposide 200 mg orally,and dexamethasone 40 mg orally on days 2–4,and pegaspargase 2,500 IU/m^(2)intramuscularly on day 5)regimen(four cycles),combined with sandwiched radiotherapy. | Huijuan Zhong Shu Cheng Xi Zhang Bing Xu Jiayi Chen Xufeng Jiang Jie Xiong Yu Hu Guohui Cui Juying Wei Wenbin Qian Xiaobing Huang Ming Hou Feng Yan Xin Wang Yongping Song Jianda Hu Yuanhua Liu Xuejun Ma Fei Li Chongyang Wu Junmin Chen Li Yu Ou Bai Jingyan Xu Zunmin Zhu Li Liu Xin Zhou Li Huang Yin Tong Ting Niu Depei Wu Hao Zhang Chaofu Wang Binshen Ouyang Hongmei Yi Qi Song Gang Cai Biao Li Jia Liu Zhifeng Li Rong Xiao Luqun Wang Yujie Jiang Yanyan Liu Xiaoyun Zheng Pengpeng Xu Hengye Huang Li Wang Saijuan Chen Weili Zhao | 2023 | The Innovation2023，4，3： | 0 |
| 8 | Guadalupian(Middle Permian)δ^13Corg changes in the Lower Yangtze,South China显示文摘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 intervals.Carbonisotope tracers can provide insights for these environmental changes.Theδ^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 ragnics.Here,we present carbon isotopic compositions of organic matters in the Guadalupian from two sections(Chaohu and Xiaolao)in the Lower Yangtze area.South China.Our 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 Capitanian.These 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 signal.The Roadian positive peak was probably due to high productivity which was caused by upwelling during cooling time.The 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,respectively.The less important causes for the gradualδ^13C negative shift are volcanic-gases releasing,decreased mountain belts,and the resultant reduced silicate weathering-consumption of CO2.The gradual negative shift ofδ^13C coincides with the gradual extinction in the Guadalupian.Therefore,global sea-level drop and marine reducing conditions may be the main causes of the gradual extinction in the Guadalupian. | Hengye Wei Ziao Geng Xuan Zhang | 2020 | Acta Geochimica2020，39，6： | 0 |
| 9 | A Toarcian Ocean Anoxic Event record from an open-ocean setting in the eastern Tethys: Implications for global climatic change and regional environmental perturbation显示文摘The Early Toarcian“Oceanic Anoxic Event”(T-OAE)is recorded by marked disruption to both the climate system and marine ecosystems.Here,we present intergraded high-resolution carbon-isotope data(δ^(13)C),bulk geochemistry,mineral characterization from an open-ocean setting in the eastern Tethys.With 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. | Xiugen FU Jian WANG Huaguo WEN Chunyan SONG Zhongwei WANG Shengqiang ZENG Xinglei FENG Hengye WEI | 2021 | Science China Earth Sciences2021，64，11： | 0 |
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