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Stratigraphic framework and sedimentary evolution during the Cryogenian-Ediacaran transition in northeastern Sichuan Basin,South China

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Petroleum Science 2024年第2期21卷 823-835页

作者： Yi Zhang Hong-Wei Kuang Yong-Qing Liu Qiang Shi Dong-Ge Wang Ke-Ning Qi Yu-Chong Wang Da-Wei Qiao Xiao-Shuai Chen Li-Zhi Wu Meng Tian Long Chen Yi Wei Liao-Yuan Song Jian Li Zi-Gang Wu Yun-Qian Liu Xuan-Chun Liu An-Qing Chen Zhi-Wei Liao Institute of Geology Chinese Academy of Geological SciencesBeijing100037China State key laboratory of Coal Mine Disaster Dynamics and Control School of Resources and Safety EngineeringChongqing UniversityChongqing400044China No.205 Geological Team Chongqing Bureau of Geology and Minerals ExplorationChongqing401121China Chongqing Institute of Geological Survey Chongqing401122China key laboratory of deep-time geography and environment reconstruction and applications of ministry of natural resources Chengdu University of TechnologyChengdu610059SichuanChina

The northeastern Sichuan area in the northern Yangtze margin has unique Ediacaran geological records,especially the Doushantuo Formation(DST),and become a hot research area in recent years.However,the Cryogenian-Ediacaran(C-E)boundary has not been precisely identified,which restricts the in-depth study of geological information during this crucial transitional period and is unfavorable for a systematic and complete understanding of the Yangtze Block and even the global paleogeographic pattern.This study conducted stratigraphy,sedimentology,and chronostratigraphy to establish the stratigraphic framework and sedimentary evolution of the C-E transition strata in northeastern Sichuan.The results showed that the Ediacaran sediments,without the cap dolomite,unconformably overlaid the Cryogenian sediments in the studied area.The Member II of the DST,characterized by 50-160 m of red-green sandstone(approximately equivalent to the original Chengkou“Guanyinya Formation”),directly overlaid the Cryogenian sediments and displayed a 623±2.3 Ma maximum depositional age from the detrital zircon U-Pb dating.Regional stratigraphic correlations indicate that the C-E transition strata in northeastern Sichuan had a consistent lithological association and sedimentary sequence characteristics but differed from the Three Gorges.Typically,the upper Nantuo massive glacial diamictites transition to the icebergs rafted lonestone-bearing mudstones at the top,then change upward to DST barrier coast sandstones.The proposed DST of the northeastern Sichuan Basin was divided into three lithostratigraphic members without the regional Member I cap dolomite:(i)Member II purple-red,gray-green sandstone strata,(ii)MemberⅢblack mudstone strata,and(iii)Member IV P-Mn bearing strata.During the C-E transition,the study area experienced(i)the global deglaciation stage in the terminal Marinoan glaciation and(ii)the filling-leveling up stage with clastic rocks in the early Ediacaran.Overall,the early Ediacaran of northeastern Sichuan succeeded the paleogeogr

关键词： Marinoan glaciation Doushantuo formation Cap dolomite Deglacial and coastal deposits Detrital zircon U-Pb dating

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Low Resource Chinese Geological Text Named Entity Recognition Based on Prompt Learning

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Journal of Earth Science 2024年第3期35卷 1035-1043页

作者： Hang He Chao Ma Shan Ye Wenqiang Tang Yuxuan Zhou Zhen Yu Jiaxin Yi Li Hou Mingcai Hou State key laboratory of Oil and Gas Reservoir Geology and Exploitation Institute of Sedimentary GeologyCollege of Computer Science and Cyber SecurityChengdu University of TechnologyChengdu 610059China key laboratory of deep-time geography and environment reconstruction and applications of ministry of natural resources Chengdu University of TechnologyChengdu 610059China School of Information Engineering China University of Geosciences(Beijing)Beijing 100083China

Geological reports are a significant accomplishment for geologists involved in geological investigations and scientific research as they contain rich data and textual information.With the rapid development of science and technology,a large number of textual reports have accumulated in the field of geology.However,many non-hot topics and non-English speaking regions are neglected in mainstream geoscience databases for geological information mining,making it more challenging for some researchers to extract necessary information from these texts.natural Language Processing(NLP)has obvious advantages in processing large amounts of textual data.The objective of this paper is to identify geological named entities from Chinese geological texts using NLP techniques.We propose the RoBERTa-Prompt-Tuning-NER method,which leverages the concept of Prompt Learning and requires only a small amount of annotated data to train superior models for recognizing geological named entities in low-resource dataset configurations.The RoBERTa layer captures context-based information and longer-distance dependencies through dynamic word vectors.Finally,we conducted experiments on the constructed Geological Named Entity Recognition(GNER)dataset.Our experimental results show that the proposed model achieves the highest F1 score of 80.64%among the four baseline algorithms,demonstrating the reliability and robustness of using the model for Named Entity Recognition of geological texts.

关键词： Prompt Learning Named Entity Recognition(NER) low resource geological text text information mining big data geology.

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Uncovering the largest negative carbon isotope excursion in Earth history

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Science China Earth Sciences 2024年第3期67卷 885-889页

作者： Chao LI Haiyang WANG State key laboratory of Oil and Gas Reservoir Geology and Exploitation Chengdu University of TechnologyChengdu 610059China Institute of Sedimentary Geology Chengdu University of TechnologyChengdu 610059China key laboratory of deep-time geography and environment reconstruction and applications of ministry of natural resources Chengdu University of TechnologyChengdu 610059China International Center for Sedimentary Geochemistry and Biogeochemistry Research Chengdu University of TechnologyChengdu 610059China State key laboratory of Biogeology and environmental Geology China University of GeosciencesWuhan 430074China

The carbon cycle plays a pivotal role in regulating Earth’s surface environment through atmospheric-oceanic acid-base and redox processes, functioning as the engine driving the evolution of our planet’s surface. A deep understanding of the carbon cycle’s evolution is thus essential for our understanding of the evolution of our planet’s habitability.

关键词： carbon planet evolution

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Microfacies and paleoenvironment of microbialites of the Cambrian(Stage 4)Qingxudong Formation in the Huayuan area,northwestern Hunan Province,southern China

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Journal of Palaeogeography 2023年第4期12卷 587-602页

作者： Zhong-Tang Su De-Min Zhang Jie Tang Pei-Jie Sun Zhen-Feng Luo Hui Ma State key laboratory of Oil and Gas Reservoir Geology and Exploitation Chengdu University of TechnologyChengdu 610059Sichuan ProvinceChina key laboratory of deep-time geography and environment reconstruction and applications of ministry of natural Resource Chengdu University of TechnologyChengdu 610059Sichuan ProvinceChina Institute of Sedimentary Geology Chengdu University of TechnologyChengdu 610059Sichuan ProvinceChina Sinopec Petroleum Exploration and Production Research Instutite Beijing 100083China

After the extinction of Archaeocyatha(sponges),microbial bioherms were well developed in the lower Cambrian of the Yangtze cratonic basin,especially in the Qingxudong Formation(Cambrian(Stage 4))of the Huayuan area,northwestern Hunan Province,southern China.Herein,four sections from this area were chosen for investigating and analyzing their microfacies and depositional environment.Twelve microfacies types were recognized through petrographic analysis of textural attributes and calcimicrobes(including Epiphyton,Renalcis,Girvanella and Kenella),respectively as:laminated calcareous mudstone(MF1),algal wackestone(MF2),intraclastic grainstone(MF3),algal intrasparrudite(MF4),oolitic algal intrasparrudite(MF5),sparry oolitic grainstone(MF6),Epiphyton framestone(MF7),Renalcis bafflestone(MF8),Kenella bafflestone(MF9),Girvanella boundstone(MF10),thrombolitic boundstone(MF11),and dolomite(MF12).These microfacies represent four major depositional environments:carbonate ramp,carbonate platform,slope and tidal flat.Calcimicrobes played an important role in the transition from carbonate ramp to platform,while the evolution from ramp to tidal flat must be ascribed to sea-level fall during the Cambrian Age 4.

关键词： Microfacies Microbialite Carbonates Epiphyton Cambrian Yangtze craton Sea level

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Low Resource Chinese Geological Text Named Entity Recognition Based on Prompt Learning

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Journal of Earth Science 2023年

作者： Hang He Chao Ma Shan Ye Wenqiang Tang Yuxuan Zhou Zhen Yu Jiaxin Yi Li Hou Mingcai Hou key laboratory of deep-time geography and environment reconstruction and applications of ministry of natural resources Chengdu University of Technology School of Information Engineering China University of Geosciences (Beijing) State key laboratory of Oil and Gas Reservoir Geology and Exploitation & Institute of Sedimentary Geology & College of Computer Science and Cyber Security Chengdu University of Technology

Geological reports are a significant accomplishment for geologists involved in geological investigations and scientific research as they contain rich data and textual information. With the rapid development of science and technology， a large number of textual reports have accumulated in the field of geology. However， many non-hot topics and non-English speaking regions lack attention in mainstream geoscience databases for geological information mining， making it more challenging for some researchers to extract necessary information from these texts. natural Language Processing (NLP) has obvious advantages in processing large amounts of textual data. The objective of this paper is to identify geological named entities from Chinese geological texts using NLP techniques. We propose the RoBERTa-Prompt-Tuning-NER method， which leverages the concept of prompt learning and requires only a small amount of annotated data to train superior models for recognizing geological named entities in low-resource dataset configurations. The RoBERTa layer captures context-based information and longer-distance dependencies through dynamic word vectors， Finally， we conducted experiments on the constructed Geological Named Entity Recognition dataset (GNER). Our experimental results show that the proposed model achieves the highest F1 score of 80.64% among the four baseline algorithms， demonstrating the reliability and robustness of using the model for named entity recognition of geological texts.

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Dynamic Variations of Carbon-Sulfur Cycles through the Late Permian to Early Triassic

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Journal of Earth Science 2023年

作者： Biao Ma Laishi Zhao Lei Zhang Zihu Zhang Shunling Wu Zhengyi Lyu Xiangdong Wang Chao Li State key laboratory of Oil and Gas Reservoir Geology and Exploitation & Institute of Sedimentary Geology Chengdu University of Technology International Center for Sedimentary Geochemistry and Biogeochemistry Research Chengdu University of Technology key laboratory of deep-time geography and environment reconstruction and applications of ministry of natural resources Chengdu University of Technology State key laboratory of Geological Processes and Mineral resources China University of Geosciences

Marine carbon-sulfur cycles experienced long-term frequent perturbations through the latest Permian to Early Triassic. However, relationships between carbon and sulfur isotopes are still unclear. Here, we report δ13Ccarband δ34SCAS, and elemental proxies(UEF, MoEF, Mn/Th, Cd/Mo and Co×Mn) from the Wuchiapingian to Spathian successions(Zuodeng section) in the southern Nanpanjiang Basin, South China. Sudden decreases in both UEF and MoEF values(from ～150 to time. Both δ13Ccarband δ34SCASexcursions were coupled during the Griesbachian and Dienerian substages probably due to elevated or suppressed marine productivity and co-burial of organic matter and pyrite driven by climatic variations. Decoupled δ13Ccarb-δ34SCASexcursions occurred during the Late Permian and the Smithian global warming, respectively probably because of elevated bacterial sulfate reduction and pyrite burial rate induced by serious global-oceanic anoxia. This study deciphers that dynamic variations of marine carbon-sulfur cycles may have been controlled by extremely environmental changes through the Late Permian to Early Triassic.

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Climate paleogeography knowledge graph and deep time paleoclimate classifications

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Geoscience Frontiers 2023年第5期14卷 362-372页

作者： Chenmin Yu Laiming Zhang Mingcai Hou Jianghai Yang Hanting Zhong Chengshan Wang State key laboratory of Biogeology and environmental Geology School of the Earth Science and ResourcesChina University of GeosciencesBeijing 100083China key laboratory of deep-time geography and environment reconstruction and applications MNR&Institute of Sedimentary GeologyChengdu University of TechnologyChengdu 610059China State key laboratory of Oil and Gas Reservoir Geology and Exploitation Institute of Sedimentary GeologyChengdu University of TechnologyChengdu 610059China State key laboratory of Biogeology and environmental Geology School of Earth SciencesChina University of GeosciencesWuhan 430074China

The climate paleogeography,especially the climate classifications,helps to interpret the global and regional climate changes and intuitively compare the climate conditions in different regions.However,the application of climate classification in deep time(i.e.,climate paleogeography)is prohibited due to the usually qualitatively constrained paleoclimate and the inconsistent descriptions and semantic heterogeneity of the climate types.In this study,a climate paleogeography knowledge graph is established under the framework of the deep-time Digital Earth program(DDE).The hierarchical knowledge graph consists of five paleoclimate classifications based on various strategies.The classifications are described and their strengths and weaknesses are fully evaluated in four aspects:“simplicity,applicability,quantifiability,and comparability”.We also reconstruct the global climate distributions in the Late Cretaceous according to these classifications.The results are compared and the relationships among these climate types in different classifications are evaluated.Our study unifies scientific concepts from different paleoclimate classifications,which provides an important theoretical basis for the application of paleoclimate classifications in deep time.

关键词： Climate paleogeography Knowledge graph Paleoclimate classification deep-time Digital Earth program

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A Five-stage Evolution of Earth's Phosphorus Cycle

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地质学报:英文版 2023年第5期97卷 1306-1317页

作者： JIAO Liangxuan Matthew SDODD Thomas JALGEO LI Chao key laboratory of deep-time geography and environment reconstruction and applications of ministry of natural resources Chengdu University of TechnologyChengdu 610059China State key laboratory of Oil and Gas Reservoir Geology and Exploitation&Institute of Sedimentary Geology Chengdu University of TechnologyChengdu 610059China International Center for Sedimentary Geochemistry and Biogeochemistry Research Chengdu University of TechnologyChengdu 610059China School of Earth Sciences University of Western AustraliaPerth 6009Australia State key laboratory of Biogeology and environmental Geology China University of GeosciencesWuhan 430074China State key laboratory of Geological Processes and Mineral resources China University of GeosciencesWuhan 430074China Department of Geosciences University of CincinnatiCincinnatiOH 45221U.S.A.

Phosphorus(P)is a key biological nutrient and probably the ultimate limiter of marine productivity during Earth history.In recent years,a wealth of new knowledge has revolutionized our understanding of the global P cycle,yet its longterm evolution remains incompletely documented.In this paper,we review the effects of three major controlling factors on the long-term evolution of the global P cycle,i.e.,tectonics,marine redox conditions,and bio-evolution,on the basis of which a five-stage model is proposed:StageⅠ(>~2.4 Ga),tectonic-lithogenic-controlled P cycling;StageⅡ(~2.4 Ga to 635Ma),low-efficiency biotic P cycling;StageⅢ(~635 Ma to 380 Ma),transitional biotic P cycling;StageⅣ(~380 Ma to near-modern),high-efficiency biotic P cycling;and Stage V(Anthropocene),human-influenced P cycling.This model implies that the earlier-proposed Ediacaran reorganization of the marine P cycle may represent only the start of a-250-Myr-long transition of the Earth's P cycle(StageⅢ)between the low-efficiency biotic mode of the Proterozoic(StageⅡ)and the high-efficiency biotic mode of the Phanerozoic(StageⅣ).The development of biologically-driven,high-efficiency P cycling may have been a key factor for the increasing frequency and volume of phosphorite deposits since the late Neoproterozoic.

关键词： tectonics marine redox life evolution phosphorite Ediacaran Anthropocene

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Late Mesozoic Wangxiang Composite Granitic Pluton, South China Block: Implications to Magma Emplacement and Evolution from Geochemical Proxies

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Journal of Earth Science 2022年

作者： Quan Ou Jing-Yi Liu Feng Zi Bruna B.Carvalho Xiao-Ping Long Jian-Qing Lai Kun Wang Zi-Qi Jiang Yi-Zhi Liu Zheng-Lin Li Hong-Yun Wang School of resources and Geosciences China University of Mining and Technology School of Earth Sciences and Spatial Information Engineering Hunan University of Science and Technology Dipartimento Di Geoscienze Università Degli Studi Di Padova Guangxi key laboratory of Hidden Metallic Ore Deposits Exploration and College of Earth Sciences Guilin University of Technology key laboratory of Metallogenic Prediction of Nonferrous Metals and Geological environment Monitoring Ministry of EducationSchool of Geosciences and Info-Physics Central South University State key laboratory of Continental Dynamics Northwest University State key laboratory of Oil and Gas Reservoir Geology and Exploitation and Key Laboratory of Deep-time Geography and Environment Reconstruction and Applications of Ministry of Natural Resources Institute of Sedimentary Geology Chengdu University of Technology

Composite granitic pluton with distinct units is a potential target for identifying its detailed magma evolution. Here, we present zircon U-Pb ages and Hf isotope, whole-rock major and trace element compositions and Nd-Pb isotopes of the Wangxiang composite pluton, South China. New ages obtained show that these rocks were generated in Late Jurassic(ca. 156–158 Ma). The rocks are divided into low silica(SiO2 71 wt.%, two-mica granites, garnet-bearing muscovite granites and muscovite granites). The high silica rocks are enriched in light rare earth elements(LREEs) relative to heavy REEs(HREEs)((La/Yb)N= 15.6–41.9, while the low silica rocks are not(0.7–76.6). All rocks show various negative Ti, Sr, Eu and strong positive Pb anomalies. The low silica rocks have less negative values of εNd(t)(-8.79 to-6.99),similar values of(206Pb/204Pb)i(18.155–18.346) and εHf(t)(-9.51 to-3.47, except one-12.84), compared to the high silica rocks(εNd(t)=-11.14 to-10.26;(206Pb/204Pb)i= 17.935–19.093; εHf(t) =-12.03 to-7.15, except one-2.41). Data suggest that the parental magma of the studied rocks(represented by enclaves) was produced by partial melting of a garnet-free crustal source. Subsequently those crustal magmas formed the more evolved units through assimilation and fractional crystallization processes, and fluid enrichment during the final magmatic activity. Combining our results with previous multidisciplinary studies, we propose that the key factor to control the evolution of Wangxiang composite pluton is discrete emplacement of crustal magmas by dyking.

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Ultra-deep carbonate basement reservoirs formed by polyphase fracture-related karstification in the Offshore Bohai Bay Basin, China

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Petroleum Science 2023年第4期20卷 2009-2025页

作者： Jian Luo Hai-Yang Cao Domenico Chiarell Ru-Lin Miao Tao Ye Yun-Long Xu An-Qing Chen Xiao-Ping Luo State key laboratory of Oil&Gas Reservoir Geology and Exploration(Chengdu University of Technology) ChengduSichuan610059China key laboratory of deep-time geography and environment reconstruction and applications MNR&Institute of Sedimentary GeologyChengdu University of TechnologyChengduSichuan610059China Department of Earth Sciences Royal Holloway University of LondonSurreyTW200EXUnited Kingdom Tianjin Branch of China National Offshore Oil Company Ltd. Tianjin300452China Exploration and Development Research Institute Zhongyuan Oilfield CompanySINOPECPuyangHenan457001China

The Palaeozoic carbonate basement of the Offshore Bohai Bay Basin (OBBB) presents considerable potential for hydrocarbon exploration. However, the multistage tectonism and complex superimposed palaeo-karstification in the area are unclear, which leads to a lack of understanding on the formation mechanism and distribution of the deep carbonate basement reservoirs. In this study, the occurrence of a fracture-vug network and its fillings in carbonate reservoirs were investigated based on borehole cores, thin sections, and image logs from the southwestern slope of the OBBB's Bozhong Sag. Then the diagenetic fluid properties of the carbonate matrix and fillings were analysed via the data of carbon, oxygen, and strontium isotopes, and major, rare elements from coring intervals. The results revealed that fracture-related karst reservoirs have lithologic selectivity inclined toward dolomite strata. The intersecting relationships, widths, and strikes of the fractures and the regional tectonic background indicate three structural fracture families: NW-, NNE-, and NNW- trending, related to the Indosinian, middle Yanshanian, and late Yanshanian orogeny, respectively. The Indosinian NW- and end-Mesozoic NNE-trending fractures produced by compressional tectonic stress mainly contributed to the formation of the basement reservoirs. The geochemistry of the calcite veins filling these fractures suggests two main types of diagenetic fluids. The fluid of autogenic recharge related to the earlier fills is karstification diffuse flow dominated by internal runoff from rainfall in the highland setting of the Indosinian thrusting orogenic belt. The other fluid of allogenic recharge related to the later fills is the main lateral freshwater flow dominated by external runoff from the catchment in the setting of the horst-lowland within the rifting basin, induced by the Yanshanian destruction of the North China Craton. Finally, the relationship between the three fracture families and two kinds of related fluids is revealed. This allows us t

关键词： Carbonate basement reservoirs Buried hill Diagenetic fluid Fracture system Karstification Bohai bay basin

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