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Journal of Oceanology and Limnology 2021年第3期39卷 814-829页

作者： Yuxiao HUANG xingwei guo Xunhua ZHANG Laixing CAI Ocean University of China Qingdao 266071China Qingdao Institute of Marine Geology Qingdao 266071China Laboratory for Marine Mineral Resources Pilot National Laboratory for Marine Science and Technology(Qingdao)Qingdao 266237China Institute of Oceanology Chinese Academy of SciencesQingdao 266071China

To reconstruct the paleoenvironment,the petrography and geochemical compositions of the upper Permian Dalong Formation(Fm)(P_(3)d)sandstones in the Central Uplift,South Yellow Sea Basin,was investigated,after which the provenance,tectonic setting,weathering conditions,and diagenetic history were *** Dalong Fm is mainly composed of sandstones with a few mudstones and *** petrographic analysis showed that the P_(3)d sandstones are in low maturity and could be classified into feldspar sandstone and lithic sandstone on average framework composition of Q_(63)F_(16)L_(21).The major and trace element results show that Dalong Fm sandstones are enriched in Rb and depleted in Cr and Ni compared with the upper continental crust(UCC).The chemical weathering intensity is weak to low moderate in the source area as indicated by the chemical index of alteration(CIA)and other results from a variety of *** diagenetic process included three main stages:eodiagenesis,mesodiagenesis,and *** discrimination plots show that the source areas were an active continental margin(ACM)and a passive continental margin(PCM),which may have been related to the northward movement of the Lower Yangtze Plate(LYP)and the collision between the LYP and the North China Plate(NCP).

关键词： rock geochemistry rock weathering tectonic setting evolution of rock South Yellow Sea Basin

Advancements and Prospects in Continuous Wave Time-resolved Electron Paramagnetic Resonance

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Chemical Research in Chinese Universities 2024年第5期40卷 798-805页

作者： ZHANG Shixue ZHOU Shengqi WU Hao guo xingwei Center of Basic Molecular Science(CBMS) Department of ChemistryTsinghua UniversityBeijing100084P.R.China

This brief review highlights the techniques and diverse applications of time-resolved electron paramagnetic resonance(TREPR)spectroscopy,underscoring its essential role in elucidating the structures,spin dynamics,and reactivities of open-shell ***,we discuss the limitations of traditional TREPR methodologies,particularly their challenges in directly observing reactive radical intermediates under real-world reaction ***,we present the latest advancements in TREPR technology developed in our laboratory,specifically ultrawide single-sideband phase-sensitive detection(U-PSD)TREPR,highlighting its significant impact and tremendous potential in advancing free radical chemistry *** envision promising future applications of TREPR and its pivotal role in enhancing our understanding of mechanisms involved in complex radical processes and photocatalysis.

关键词： Time-resolved electron paramagnetic resonance(TREPR) Ultrawide single-sideband phase-sensitive detection(U-PSD) Spin chemistry Radical chemistry Photochemistry

Basin modeling in the initial stage of exploration： a case study from the North Subbasin of the South Yellow Sea Basin

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Acta Oceanologica Sinica 2017年第9期36卷 65-78页

作者： PANG Yumao ZHANG Xunhua guo xingwei XIAO guolin HAN Zuozhen College of Earth Science and Engineering Shandong University of Science and Technology Qingdao 266590 China Laboratory for Marine Mineral Resources Qingdao National Laboratory for Marine Science and Technology Qingdao 266071 China Institute of Oceanology Chinese Academy Science Qingdao 266071 China Qingdao Institute of Marine Geology Qingdao 266071 China Nanjing Center China Geological Survey Nanjing 210016 China

Basin modeling has become an important tool for analyzing sedimentary basins. The North Subbasin of the South Yellow Sea Basin is filled with thick Meso-Cenozoic terrigenous deposits during the rift evolution stage. The accumulation of data and achievements of geological investigations in recent years have provided the preconditions for basin modeling. The necessary parameters and geological elements for simulations are collated and summarized. Modeling of tectono-thermal evolution is performed and the related trend in heat flow is reconstructed and calibrated. The heat flow value commences from an average level of 61 m W/m2during MiddleLate Jurassic, rises to about 80 m W/m2from circa 145 Ma to circa 74 Ma, and then undergoes a gradual decline to65 m W/m2until the end of *** evolutionary phases, namely, the initial rifting phase, syn-rifting phase, and post-rifting phase, have been identified. The modeling results show that the North Subbasin generally enters into a stage of strong rifting during Cretaceous and undergoes rapid subsidence until the Late Cretaceous,then follows by a stage of moderate rifting during the Paleogene. The input and general workflow involved in 3-D modeling are introduced. Reconstruction of the petroleum system in the North Subbasin reveals that the threshold depth of hydrocarbon generation is located near the top of the Paleogene Funing formation, and the underlying Jurassic and Cretaceous source rocks have reached or exceeded peak oil generation and have almost completed the generation and expulsion of hydrocarbons. The main generation and expulsion in the Jurassic source rocks take place during the syn-rifting and post-rifting phases, whereas the peak generation and expulsion in the Cretaceous and Paleogene source rocks take place during the post-rifting phase. Although the study area is still a relatively less explored sedimentary basin, the results of modeling can provide valuable information for exploration. A preliminary

关键词： basin modeling tectono-thermal evolution history petroleum system South Yellow Sea Basin

New insights into marine hydrocarbon geological conditions in the South Yellow Sea Basin:evidence from borehole CSDP-2

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Journal of Oceanology and Limnology 2020年第4期38卷 1169-1187页

作者： CAI Laixing XIAO guolin ZENG Zhigang ZHANG Xunhua guo xingwei WANG Shuping Key Laboratory of Marine Geology and Environment Institute of OceanologyChinese Academy of SciencesQingdao 266071China Laboratory for Marine Mineral Resources Pilot National Laboratory for Marine Science and Technology(Qingdao)Qingdao 266237China Qingdao Institute of Marine Geology China Geological SurveyQingdao 266071China Oil Industry Training Center China University of Petroleum(East China)Qingdao 266580China

The South Yellow Sea Basin(SYSB) has multiple sets of proven source rocks and good hydrocarbon prospects,but no industrial oil and gas has been explored at *** solve this puzzle for petroleum geologists,we systematically investigated the marine hydrocarbon geological conditions based on cores and testing data from borehole CSDP-2,the first exploration well with continuous coring in *** qualities of source rocks are evaluated in detail according to organic matter abundance,type,and *** reservoir characterization mainly includes porosity,permeability,and reservoir *** pressure test and stratum thickness are the main foundations for defining the ***,the oil-source rock correlation in the Permian and stratum model are analyzed to determine the favorable source-reservoir-caprock *** results show that three sets of effective source rocks(the Lower Triassic,Upper Permian,and Lower Permian),two sets of tight sandstone re servoirs(the Upper Permian and Lower Silurian-Upper Devonian),and two sets of caprocks(the Lower Triassic and Carboniferous) combine to constitute the hydrocarbon reservoir-forming as se mblages of "lower-ge neration and upper-accumlation" and "self-generation and self-accumlation",thus laying a solid foundation for promising petroleum *** three sets of marine source rocks are characterized by successive generation and expulsion stages,which guarantees multistage hydrocarbon *** three sets of continental source rocks distributed across the Middle Jurassic,Upper Cretaceous,and Paleogene depression areas,especially in the Northern Depression,may supplement some hydrocarbons for the Central Uplift through faults and the Indosinian *** favorable Permian exploration strata have been identified in the Central Uplift of ***,the Lower Permian and Upper Permian source rocks with high organic matter abundance and high thermal maturity supply sufficient hydrocarbon

关键词： hydrocarbon geological conditions near-source accumulation relay hydrocarbon generation multistage accumulation favorable Permian South Yellow Sea Basin borehole CSDP-2

Provenance and Tectonic Implications of Paleozoic Strata in the South Yellow Sea Basin, China-Revealed from the Borehole CSDP-2

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Journal of Ocean University of China 2020年第3期19卷 536-550页

作者： GAO Xiaohui ZHANG Xunhua guo xingwei CAI Laixing HOU Fanghui ZHU Xiaoqing College of Marine Geosciences Ocean University of ChinaQingdao 266100China Institute for Advanced Ocean Study Ocean University of ChinaQingdao 266100China Laboratory for Marine Mineral Resources Pilot National Laboratory for Marine Science and TechnologyQingdao 266237China Qingdao Institute of Marine Geology China Geological SurveyQingdao 266071China

Well CSDP-2 is a fully coring deep drilling hole, penetrating the thick Paleozoic marine strata in the South Yellow Sea Basin(SYSB) in the lower Yangtze Block(LYB). Based on the petrological and geochemical analysis of 40 sandstone samples from the core CSDP-2, the provenance and tectonic features of Paleozoic detrital rocks from SYSB are analyzed and systematically delineated in this article. The results show that the Silurian – Carboniferous sandstones are mature sublitharenite, while the Permian sandstones are unstable feldspathic litharenite. The average CIA(chemical index of alteration) is 74.61, which reflects these sediments were derived from source rocks with moderate chemical weathering. The REE(rare earth element) patterns are characterized by LREE enrichment, flat HREE and obviously negative Eu anomaly, which are similar to that of the upper continental crust. Dickinson QFL discrimination results indicate the recycled orogeny provenance. Various diagrams for the discrimination of sedimentary provenance based on major and trace element data show all the sediments were derived predominantly from quartz sedimentary rocks, of which the Permian strata contain more felsic sedimentary rocks. Geochemical data for these detrital rocks suggest they occur at the passive continental margin and island arc settings, and the Permian sandstone presents active continental margin setting.

关键词： South Yellow Sea Basin Paleozoic geochemistry provenance analysis tectonic setting

Characteristics of Meso-Cenozoic Igneous Complexes in the South Yellow Sea Basin,Lower Yangtze Craton of Eastern China and the Tectonic Setting

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Acta Geologica Sinica(English Edition) 2017年第3期91卷 971-987页

作者： PANG Yumao ZHANG Xunhua XIAO guolin guo xingwei WEN Zhenhe WU Zhiqiang ZHU Xiaoqing Institute of Oceanology Chinese Academy Science University of Chinese Academy of Sciences Laboratory for Marine Mineral Resources Qingdao National Laboratory for Marine Science and Technology College of Earth Science and Engineering Shandong University of Science and Technology MLR Key Laboratory of Marine Hydrocarbon Resources and Environmental Geology Qingdao Institute of Marine Geology Nanjing Center China Geological Survey

The South Yellow Sea Basin is partially surrounded by the East Asian continental Meso- Cenozoic widespread igneous rocks belt. Magnetic anomaly and multi-channel seismic data both reveal the prevalent occurrence of igneous rocks. We preliminarily defined the coupling relation between magnetic anomalies and igneous rock bodies. Some igneous complexes were also recognized by using multi-channel seismic and drilling data. We identified various intrusive and extrusive igneous rock bodies, such as stocks, sills, dikes, laccoliths and volcanic edifice relics through seismic facies analysis. We also forecasted the distribution characteristics of igneous complexes. More than fifty hypabyssal intrusions and volcanic relics were delineated based on the interpretation of magnetic anomaly and dense intersecting multi-channel seismic data. It is an important supplement to regional geology and basin evolution research. Spatial matching relations between igneous rock belts and fractures document that extensional N-E and N-NE-trending deep fractures may be effective pathways for magma intrusion. These fractures formed under the influence of regional extension during the Meso- Cenozoic after the Indosinian movement. Isotopic ages and crosscutting relations between igneous rock bodies and the surrounding bedded sedimentary strata both indicate that igneous activities might have initiated during the Late Jurassic, peaked in the Early Cretaceous, gradually weakened in the Late Cretaceous, and continued until the Miocene. Combined with previous studies, it is considered that the Meso-Cenozoic igneous activities, especially the intensive igneous activity of the Early Cretaceous, are closely associated with the subduction of the Paleo-Pacific Plate.

关键词： South Yellow Sea Basin igneous complexes magnetic anomaly seismic faciescharacteristics igneous activity plate subduction

Stretching characteristics and its dynamic significance of the northern continental margin of South China Sea

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Science China Earth Sciences 2008年第3期51卷 422-430页

作者： ZHANG YunFan SUN Zhen ZHOU Di guo xingwei SHI XiaoBin WU XiangJie PANG Xiong CAS Key Laboratory of Marginal Sea Geology South China Sea Institute of OceanologyChinese Academy of SciencesGuang-zhou 510301China Graduate University Chinese Academy of SciencesBeijing 100049China Qingdao Institute of Marine Geology China Geological SurveyQingdao 266071China China National Offshore Oil Corp.China Limited Shenzhen Guangzhou 510240China

To investigate the thinning of the whole crust, and the contribution of the upper versus lower crust to the stretching since Cenozoic, we calculated the stretching factor of the northern margin of South China Sea with data such as whole crustal thickness, depth of Cenozoic sedimentary basement and the horizontal displacement of faults. An isometric line drawing on whole crustal stretching factor is then obtained. Along the seismic Line 1530 in Baiyun sag, we also calculated the stretching factors of the upper and lower crust. The results suggest that the whole crustal thickness decreases seaward while the whole crustal stretching factor increases from shelf to slope. The Moho upwells highest beneath where the crust is thinned most. The value of the whole crustal stretching factor ranges from 1.5 to 6. Two areas were thinned intensely: the center of Yinggehai Basin, and the Baiyun sag in the Pearl River Mouth Basin. The calculation of the upper and lower crustal stretching factors from DSP1530 in Baiyun sag shows that the original crust of Baiyun sag should be thinned before deformation. Its pre-Cenozoic evolution as well as tectonic position during Cenozoic might be responsible for that.

关键词： stretching factor the northern continental margin of South China Sea upper crust lower crust original hot thinned crust Baiyun sag

Characteristics and classification of paleozoic tight reservoirs in the central uplift of the South Yellow Sea Basin

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Energy Geoscience 2022年第4期3卷 383-393页

作者： Yumao Pang xingwei guo Xiangchun Chang Junjian Zhang Jingqi Zhou Laixing Cai Shandong Provincial Key Laboratory of Depositional Mineralization and Sedimentary Minerals Shandong University of Science and TechnologyQingdaoShandong266590China Laboratory for Marine Mineral Resources Qingdao National Laboratory for Marine Science and TechnologyQingdaoShandong266237China Qingdao Institute of Marine Geology QingdaoShandong266071China Key Laboratory of Marine Geology and Environment Institute of OceanologyChinese Academy of SciencesQingdaoShandong266071China

Several sets of Paleozoic tight reservoirs are developed in the Central Uplift of the South Yellow Sea Basin.A qualitative analysis of the microscopic pore structure of the tight reservoir rocks was carried out through cast thin slice and scanning electron microscopic image *** on reservoir pet-rophysical properties,thirty core samples in the Central Uplift of the South Yellow Sea Basin were selected for high-pressure mercury intrusion(HPMI)analysis,which was then combined with fractal calculation to classify and evaluate the tight *** analysis of the HPMI curves and related parameters shows that the Paleozoic tight reservoirs can be divided into three types:Type-A,Type-B and ***-A sandstone reservoirs contain pores with size mostly ranging between 0.01 and 0.1 mm,followed by pores with size range of 0.001-0.01 m m,and relatively fewer pores larger than 0.1 m *** Type-B reservoirs are carbonate rocks with extremely heterogeneous pore size distribution,which is closely related to the development of dissolution pores and ***-C sandstone reservoirs are dominated by nanopores and submicron pores that distribute more heterogeneously than pores in Type-A *** pore distribution in sandstone reservoirs shows significant fractal characteristics and is closely related to the pore *** heterogeneity of nanopore distribution has a negative cor-relation with porosity and median pressure and a relatively weak correlation with *** study has important implications for petroleum exploration in the South Yellow Sea Basin.

关键词： South Yellow Sea Basin Tight reservoir High-pressure mercury injection Fractal characteristics

Characteristics of crustal variation and extensional break-up in the Western Pacific back-arc region based on a wide-angle seismic profile

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Geoscience Frontiers 2021年第3期12卷 296-313页

作者： Jianghao Qi Xunhua Zhang Zhiqiang Wu XiangjunMeng Luning Shang Yang Li xingwei guo Fanghui Hou Enyuan He QiangWang Qingdao Institute of Marine Geology QingdaoChina Laboratory for Marine Mineral Resources Pilot National Laboratory for Marine Science and TechnologyQingdaoChina Key Laboratory of Ocean and Marginal Sea Geology South China Sea Institute of OceanologyChinese Academy of SciencesGuangzhouChina School of Resource Engineering Longyan UniversityLongyanChina

The marginal sea and back-arc basins in the Western Pacific Ocean have become the focus of tectonics due to their unique tectonic *** understand the deep crustal structure in the back-arc region,we present a 545-kmlong active-source ocean bottom seismometer(OBS)wide-angle reflection/refraction profile in the East China *** P wave velocity model shows that the Moho depth rises significantly,from approximately 30 km in the East China Sea shelf to approximately 16 km in the axis of the Okinawa *** lower crustal high-velocity zone(HVZ)in the southern Okinawa Trough,with V_(p) of 6.8-7.3 km/s,is a remarkable manifestation of the mantle material upwelling and accretion to the lower *** confirms that the lower crustal high-velocity mantle accretion is developed in the southern Okinawa *** the process of back-arc extension,the crustal structure of the southern Okinawa Trough is completely invaded and penetrated by the upper mantle material in the axis *** some areas of the southern central graben,the crust may has broken up and entered the initial stage of seafloor *** discontinuous HVZs in the lower crust in the back-arc region also indicate the migration of spreading centers in the back-arc region since the *** asthenosphere material upwelling in the continent-ocean transition zone is constantly driving the lithosphere eastward for episodic extension,and is causing evident tectonic migration in the Western Pacific back-arc region.

关键词： Western Pacific back-arc region Back-arc extension Wide-angle reflection/refraction seismic profile High-velocity zone Plate subduction retreat Tectonic migration

Characterization and Monitoring of Transient Enamine Radical Intermediates in Photoredox/Chiral Primary Amine Synergistic Catalytic Cycle

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CCS Chemistry 2024年第10期6卷 2420-2426页

作者： Shixue Zhang Liang Cheng Jian-Qing Qi Zongbin Jia Long Zhang Lei Jiao xingwei guo Sanzhong Luo Center of Basic Molecular Science(CBMS) Department of ChemistryTsinghua UniversityBeijing 100084

Enamine-derived radicals are crucial intermediates in singly occupied molecular orbital(SOMO)***,observing them directly is elusive and remains a long-standing ***,an advanced time-resolved electron paramagnetic resonance technique was employed to characterize and monitor the key intermediates in photoredox transformations by primary aminocatalysis on a microsecond *** transient enamine radical cation,generated by single electron transfer(SET),and the deprotonated form ofα-imino radical intermediates were directly observed for the first time,both spectroscopically and *** reactions with styrene,enamine radical cation was found to be faster thanα-imino radical by one order of *** revealed the subtle role of deprotonation associated with secondary enamine radical cation in the photoredox transformations by primary aminocatalysis.

关键词： aminocatalysis radical chemistry electron paramagnetic resonance direct observation time-resolved technique