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The effect of volatile components in oil on evolutionary character- istics of diamondoids during oil thermal pyrolysis

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Science china Earth Sciences 2016年第2期59卷 362-370页

作者： FANG ChenChen XIONG YongQiang LI Yun LIANG QianYong wang TongShan LI YongXin Research institute of Petroleum Exploration and Development Beijing 100083 China State Key Laboratory of Organic geochemistry Guangzhou Institute of Geochemistry Chinese Academy of Sciences Guangzhou 510640 China guangzhou Marine Geological Survey Ministry of Land and Resource Guangzhou 510760 China

On the basis of the results of simulation experiments, now we better understand the contribution of high carbon number hydrocarbons to diamondoid generation during thermal pyrolysis of crude oil and its sub-fractions(saturated, aromatic, resin, and asphalene fractions). However, little is known about the effect of volatile components in oil on diamondoid generation and diamondoid indices due to the lack of attention to these components in experiments. In this study, the effect of volatile components in oil on diamondoid generation and maturity indices was investigated by the pyrolysis simulation experiments on a normal crude oil from the HD2. well of the Tarim Basin and its residual oil after artificial volatilization, combined with quantitative analysis of diamondoids. The results indicate that the volatile components(≤n C12. in oil have an obvious contribution to the generation of adamantanes, which occurs mainly in the early stage of oil cracking(Easy Ro<1.0%), and influences the variations in maturity indices of adamantanes; but they have no obvious effect on the generation and maturity indices of diamantanes. Therefore, some secondary alterations e.g., migration, gas washing, and biodegradation, which may result in the loss of light hydrocarbons in oil under actual geological conditions, could affect the identification of adamantanes generated during the late-stage cracking of crude oil, and further influence the practical application of adamantane indices.

关键词： Crude oil Volatile component Thermal pyrolysis Diamondoids Evolution characteristics

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Zircon Ages of Metasedimentary Rocks in the Wuwamen Ophiolitic Mélange,Chinese South Tianshan:Implications for the Paleozoic Subduction-Accretion in the Southern Central Asian Orogenic Belt

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Journal of Earth Science 2022年第5期33卷 1059-1071页

作者： Xin-Shui wang Fei Yang Reiner Klemd Tuo Jiang Jun Gao School of Earth Sciences China University of GeosciencesWuhan 430074China guangzhou Urban Planning&Design Survey Research institute Guangzhou 510060China GeoZentrum Nordbayern Friedrich-Alexander-Universität Erlangen-NürnbergSchlossgarten 5aErlangen91054Germany Laboratory of Isotope geochemistry Wuhan Centre of China Geological SurveyWuhan 430205China Key Laboratory of Mineral Resources Institute of Geology and GeophysicsChinese Academy of SciencesBeijing 100029China

High-temperature and high-pressure(high-grade)metamorphic complexes of variable ages are common in the Central Asian orogenic belt(CAOB),and their precise geochronology and origin are essential to unravel the orogenic architecture and crust-production rate of the *** it is essential to differentiate between pre-orogenic Precambrian basement and Paleozoic arc-accretionary *** study provides precise in situ zircon U-Pb ages for the metasedimentary rocks in the Wuwamen ophiolitic mélange,which is traditionally thought to represent the pre-orogenic basement of the southwestern CAOB.A meta-sandstone from the meta-flysch sequence revealed a widespread ca.1.8 Ga high-grade metamorphic overprint similar to that of the underlying orthogneisses and,thus,was interpreted to represent pre-orogenic basement fragments that occur as tectonic blocks in the Paleozoic ophiolitic mé*** contrast,a schist from the mélange matrix is characterized by a ca.333 Ma high-grade metamorphic overprint,indicating that the northward subduction of the South Tianshan Ocean was still active at this *** thrust-imbricated high-grade metamorphic rocks of contrasting origins in an accretionary complex have important implications for the understanding the accretionary history and crustal growth of the ***,the strongly deformed ophiolitic mélange was intruded by an undeformed granite dyke with an emplacement age younger than ca.2.4 Ma,thus providing a minimum age limit for the final closure of the South Tianshan Ocean.

关键词： high-temperature/high-pressure metamorphism Zircon U−Pb ophiolitic mélange subduction Tianshan CAOB geochemistry

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Organic geochemical characteristics of Eocene crude oils from Zhanhua Depression,Bohai Bay Basin,china

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Acta Geochimica 2020年第5期39卷 655-667页

作者： Yujiao Zhang Hong Lu Yao-Ping wang Xin Zhan Ping'an Peng State Key Laboratory of Organic geochemistry Guangzhou Institute of GeochemistryChinese Academic of SciencesGuangzhou 510640China University of the Chinese Academy of Sciences Beijing 100049China College of Chemistry and Environmental Science Guangdong Ocean UniversityZhanjiang 524088China Geology and Geophysics Program.Missouri University of Science and Technology RollaMO 65409USA

Geochemical studies of crude oil and source rock play an important role in future exploration in Zhanhua *** this study,thirty-one oil samples collected from Shahejie Formation in Zhanhua Depression,Bohai Bay Basin,NE china have been geochemically analyzed and their organic geochemical characteristics have been applied to differentiate groups of *** oil samples can be classified into two families based on multiple biomarker proxies and stable carbon isotopic ***Ⅰis characterized by a low ratio of pristane over phytane(Pr/Ph2./C2. tricyclic terpane,and a low ratio of C19/C2. tricyclic ***Ⅱis marked by a relatively high Pr/Ph ratio(0.7-1.6),relative low ratios of Ph/n-C18 and C2./C2. tricyclic terpane,and avarying ratio of C19/C2. tricyclic *** familiesⅠandⅡwithin these crude oils can be subdivided into two families based on different values of stable carbon isotopic composition of individual ***,the potential source rocks of oil samples in FamilyⅠand FamilyⅡwere likely derived from the upper Es4 member and Es3 member,respectively,based on the correlation of organic geochemical characteristics of the oils and source *** results of oil-source rock correlation provide insight into the process from oil generation to migration and to final accumulation,providing a better understanding of factors controlling oil-gas distribution for prediction of sweet spots.

关键词： Zhanhua depression Bohai Bay Basin Biomarkers Stable carbon isotopic compositions Crude oil

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Quantitative evaluation model of shale oil adsorption:A case study of the first member of Cretaceous Qingshankou Formation in northern Songliao Basin,NE china

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Petroleum Exploration and Development 2023年第5期50卷 1137-1150页

作者： LI Jinbu wang Min LU Shuangfang LIU Liang LI Ming ZHANG Yuchen wang Xin ZHAO Xinbin ZHANG Jinyou ZHAO Ying National Key Laboratory of Deep Oil&Gas China University of Petroleum(East China)Qingdao 266580China guangzhou institute of{2. Chinese Academy of SciencesGuangzhou 510640China Sanya Offshore Oil&Gas Research institute Northeast Petroleum UniversitySanya572025China Exploration and Development Research institute of Petrochina Daqing Oilfield Company Daqing 163712China

A quantitative evaluation model that integrates kerogen adsorption and clay pore adsorption of shale oil was proposed,and the evaluation charts of adsorption-swelling capacity of kerogen(Mk)and adsorbed oil capacity of clay minerals(Mc)were established,taking the 1st member of Cretaceous Qingshankou Formation in the northern Songliao Basin as an *** model and charts were derived from swelling oil experiments performed on naturally evolved kerogens and adsorbed oil experiments on clays(separated from shale core samples).They were constructed on the basis of clarifying the control law of kerogen maturity evolution on its adsorption-swelling capacity,and considering the effect of both the clay pore surface area that occupied by adsorbed oil and formation *** results are obtained in four aspects:(1)For the Qing 1 Member shale,with the increase of maturity,Mk *** Ro of 0.83%–1.65%,Mk is about 50–2.0 mg/g.(2.The clay in shale adsorbs *** is 0.63 mg/m^(2.,and about 15%of the clay pore surface is occupied by adsorbed oil.(3)In the low to medium maturity stages,the shale oil adsorption is controlled by organic *** Ro>1.3%,the shale oil adsorption capacity is contributed by clay pores.(4)The oil adsorption capacity evaluated on the surface at room temperature is 8%–2.%(avg.15%)higher than that is held in the *** proposed evaluation model reveals the occurrence mechanisms of shale oils with different maturities,and provides a new insight for estimating the reserves of shale oil under formation temperature conditions.

关键词： shale oil adsorbed oil occurrence state mobility Cretaceous Qingshankou Formation Evaluation model Songliao Basin

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A-type granites induced by a breaking-off and delamination of the subducted Junggar oceanic plate,West Junggar,Northwest china

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china Geology 2022年第3期5卷 457-474页

作者： Chu Wu Tao Hong Xing-wang Xu Cheng-Xi wang Lian-Hui Dong Development and Research Center of china Geological Survey Ministry of Natural ResourcesBeijing 100037China Guangdong Provincial Key Lab of Geodynamics and Geohazards School of Earth Sciences and EngineeringSun Yat-sen UniversityGuangzhou 510275China Southern Marine Science and Engineering Guangdong Laboratory(Zhuhai) Zhuhai 519082China Key Laboratory of Mineral Resources Institute of Geology and GeophysicsChinese Academy of SciencesBeijing 100029China University of Chinese Academy of Sciences Beijing 100049China Institutions of Earth Science Chinese Academy of SciencesBeijing 100029China Xinjiang Bureau of Geology and Mineral Resources UrumqiXinjiang 830000China

The A-type granites with highly positiveε_(Nd)(t)values in the West Junggar,Central Asian Orogenic Belt(CAOB),have long been perceived as a group formed under the same tectonic and geodynamic setting,magmatic sourceq and petrogenetic *** evidence shows that these granites occurred at two different tectonic units related to the southeastern subduction of Junggar oceanic plate:the Hongshan and Karamay granites emplaced in the southeast of West Junggar in the Baogutu continental arc;whereas the Akebasitao and Miaoergou granites formed in the accretionary *** the authors present new bulk-rock geochemistry and Sr-Nd isotopes,zircon U-Pb ages and Hf-O isotopes data on these *** granites in the Baogutu continental arc and accretionary prism contain similar zirconε_(Hf)(t)values(+10.9 to+16.2.and bulk-rock geochemical characteristics(high SiO_(2.and K_(2.O contents,enriched LILEs(except Sr),depleted Sr,Ta and Ti,and negative anomalies in Ce and Eu).The Hongshan and Karamay granites in the Baogutu continental arc have older zircon U-Pb ages(315-305 Ma)and moderate^(18)O enrichments(δ^(18)_(O_(zircon))=+6.41‰-+7.96‰);whereas the Akebasitao and Miaoergou granites in the accretionary prism have younger zircon U-Pb ages(305-301 Ma)with higher^(18)O enrichments(δ^(18)_(O_(zircon))=+8.72.-+9.89‰).The authors deduce that the elevated^(18)O enrichments of the Akebasitao and Miaoergou granites were probably inherited from low-temperature altered oceanic *** Akebasitao and Miaoergou granites were originated from partial melting of low-temperature altered oceanic crusts with juvenile oceanic sediments below the accretionary *** Hongshan and Karamay granites were mainly derived from partial melting of basaltic juvenile lower crust with mixtures of potentially chemical weathered ancient crustal residues and mantle basaltic melt(induced by hot intruding mantle basaltic magma at the bottom of the Baogutu continental arc).On the other hand,the Miaoe

关键词： A-type granite plutons Sr-Nd-Hf-O isotopes Breaking-off and delamination Subducted Junggar oceanic plate West Junggar Central Asian Orogenic Belt

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黑臭水体沉积物中新型溴代阻燃剂的污染特征

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中国环境科学 2024年第7期44卷 3945-3954页

作者：黄晨晨曾艳红管克兰刘银娥鲁祺鸿汪善全罗孝俊麦碧娴中国矿业大学环境与测绘学院江苏徐州221116 中国科学院广州地球化学研究所有机地球化学国家重点实验室与广东省资源环境利用与保护重点实验室广东广州510640 中山大学环境科学与工程学院广东广州510006

测定了中国74个城市的173条黑臭水体沉积物中6种新型溴代阻燃剂(NBFRs)的污染现状.结果表明,十溴二苯乙烷(DBDPE)是沉积物中主要的NBFRs,其浓度范围为未检出~603.76ng/g干重,平均浓度占比高达(99.49±0.82.%;六溴苯(HBB)和五溴甲苯(PBT... 详细信息

测定了中国74个城市的173条黑臭水体沉积物中6种新型溴代阻燃剂(NBFRs)的污染现状.结果表明,十溴二苯乙烷(DBDPE)是沉积物中主要的NBFRs,其浓度范围为未检出~603.76ng/g干重,平均浓度占比高达(99.49±0.82.%;六溴苯(HBB)和五溴甲苯(PBT)占比较低.NBFRs的组成符合其在中国的生产和使用情况.尽管DBDPE、HBB和PBT均在不同城市间具有显著的浓度差异,但是总体呈现东部高(华南、华东和东北地区)、西部低(西北和西南地区)的分布格局,各地区的产业结构和城市化率是控制其空间分布的重要因素.DBDPE作为多溴联苯醚十溴工业品(BDE2.9)的替代品,其在沉积物中的浓度仍普遍低于BDE2.9,且DBDPE/BDE2.9比值与各城市的生产总值和工业产值呈显著的负相关关系.生态风险评价表明黑臭水体沉积物中DBDPE、HBB和PBT均不足以对水生生物造成暴露风险.

关键词：城市黑臭水体表层沉积物新型溴代阻燃剂污染特征生态风险评估

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Zircon U-Pb dating of Shuiquangou alkaline complex intrusives, northwestern Hebei Province

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Chinese Science Bulletin 1997年第9期42卷 772-775页

作者： Mo, CH Liang, HY wang, XZ Cheng, JP Li, HM guangzhou institute of{2. Chinese Academy of Sciences Guangzhou China Tianjin institute of Geology and Mineral Resources Chinese Academy of Geological Sciences Tianjin China

SUPER large gold deposits related to alkaline intrusions have been found in America,Canada,Australia,Papua New Guinea and *** gold deposit with superlarge potentialhas also been found in Shuiquangou alkaline complex intrusions,northwestern Hebei Province,*** of the keys to resolving the possible genetic relationship between gold deposits andore-host alkaline intrusions is to determine their formation *** note dates the Shuiquan-gou intrusions with zircon U-Pb method.

关键词： alkaline intrusions Proterozoic Era zircon U-Pb dating gold deposit.

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Boron isotope geochemistry of Zigetang Co saline lake sediments,Tibetan Plateau

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Acta Geochimica 2017年第3期36卷 437-439页

作者： Xiaodan wang Congqiang Liu Zhiqi Zhao Shijie Li Gangjian Wei State Key Laboratory of Environmental geochemistry Institute of Geochemistry Chinese Academy of SciencesGuiyang 550002 Guizhou China University of Chinese Academy of Sciences Beijing 100049China State Key Laboratory of Organic geochemistry Guangzhou Institute of Geochemistry Chinese Academy of Sciences Guangzhou 510640 China

The origin of boron in boron-rich salt lakes in the Tibetan Plateau is highly *** this study,we carried out a detailed study on boron geochemistry and isotope composition of lake sediments collected in Zigetang Co,central *** had high boron concentrations of 172.3–418.6 lg/g and δ^(11)B values of-8.2.to-3.3%,suggesting a non-marine origin for the saline *** boron isotopic fractionation factor,a,between evaporite and brackish water(a_(evaporite–brackish))decreased systematically with depth,from 0.9942.at the top of the drill core to 0.9893 at the bottom;the linear variation between α_(evaporite–brackish)and depth reflects boron isotopic fractionation associated with progressive *** positive correlation between δ^(11)B versus[B]and δ^(11)B versus depth in the evaporite phase reflects pH and boron speciation in the solution control on the adsorption of boron,and B(OH)_3 species incorporated preferentially into Mg(OH)_2.precipitation at high pH.

关键词： Boron isotopes Zigetang Co Equilibrium isotopic fractionation Boron concentration

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Multiple-Stage Mineralization in the Huayangchuan U-REE-Mo-Cu-Fe Ore Belt of the Qinling Orogen,Central china:Geological and Re-Os Geochronological Constraints

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Journal of Earth Science 2022年第1期33卷 193-204页

作者： Hongjun Jiang Chunsi Yang Dequan wang Hui Zheng Jie Li Huayong Chen Key Laboratory of Mineralogy and Metallogeny Guangzhou Institute of GeochemistryChinese Academy of SciencesGuangzhou 510640China CAS Center for Excellence in Deep Earth Science Guangzhou 510640China University of Chinese Academy of Sciences Beijing 100049China Guangdong Provincial Key Laboratory of Mineral Physics and Materials Guangzhou 510640China State Key Laboratory of Isotope geochemistry Guangzhou Institute of GeochemistryChinese Academy of SciencesGuangzhou 510640China Geological Party No.2.4 Sino Shaanxi Nuclear Industry GroupXi'an 710100China Sino Shaanxi Nuclear Industry Group Xi'an 710100China

The Huayangchuan ore belt is located in the western segment of Xiaoqinling Orogen in the southern margin of the North china Craton(NCC),and hosts voluminous magmatism and significant U-REE-Mo-Cu-Fe polymetallic ***,geochronological framework of the various mineralization phases in this region is poorly ***,we present new Re-Os isochron ages on magnetite from the Caotan Fe deposit(2.675 ± 410 Ma,MSWD = 0.55),and on pyrite from the Jialu REE deposit(2.12. ± 2.0 Ma,MSWD = 1.9) and Yuejiawa Cu deposit(418 ± 2. Ma,MSWD =11.5),and Re-Os weighted average model age on pyrite from the Taoyuan Mo-U deposit(2.5 ± 14 Ma,MSWD = 0.17).These ages,combined with regional geology and mineralization ages from other deposits,suggest that mineralization in the Huayangchuan ore belt lasted from the Neoarchean to the Late *** mineralization corresponds to regional tectono-magmatic events,including the Neoarchean alkali magmatism(REE mineralization),Paleoproterozoic plagioclase-amphibolite emplacement(Fe mineralization),Paleoproterozoic pegmatite magmatism(U mineralization),Paleozoic Shangdan oceanic slab subduction-related arc magmatism(Cu mineralization),Early Mesozoic Paleo-Tethys Ocean subduction-related arc magmatism(Mo-U mineralization),and Late Mesozoic Paleo-Pacific oceanic plate subduction direction change-related Mo(-Pb) *** proposed that the Huayangchuan ore belt has undergone prolonged metallogenic evolution,and the magmatism and associated mineralization were controlled by regional geodynamic events.

关键词： Re-Os dating U-REE-Mo-Cu-Fe mineralization Huayangchuan ore belt extra-long metallogenic history Qinling Orogen geochemistry

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广州周边地区地表水稀土元素污染特征及来源解析

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地球化学 2024年第1期53卷 64-76页

作者：邓丽明王园园尹小玲朱建喜林卓玲黄爱琳广东省科学院广州地理研究所广东省地理空间信息技术与应用公共实验室/广东省遥感与地理信息系统应用重点实验室广东广州510070 中国科学院广州地球化学研究所广东省矿物物理与材料研究开发重点实验室广东广州510460 中国科学院大学北京100049 南方海洋科学与工程广东省实验室(广州) 广东广州511458 上海海洋大学海洋生态与环境学院上海201306

以广州市周边地区地表水为研究对象,测定地表水中溶解态稀土元素La、Ce、Pr、Nd、Sm、Eu、Gd、Tb、Dy、Ho、Er、Tm、Yb和Lu的浓度,采用单因子评价指数、内梅罗综合污染指数以及潜在生态风险指数对地表水中溶解态稀土元素进行污染和风险... 详细信息

以广州市周边地区地表水为研究对象,测定地表水中溶解态稀土元素La、Ce、Pr、Nd、Sm、Eu、Gd、Tb、Dy、Ho、Er、Tm、Yb和Lu的浓度,采用单因子评价指数、内梅罗综合污染指数以及潜在生态风险指数对地表水中溶解态稀土元素进行污染和风险评价,通过APCS-MLR受体模型对广州市周边城区地表水中溶解态稀土元素的来源进行定量化解析,探究高度城市化的非矿区地表水中稀土元素的浓度分布特征。结果表明,研究区地表水溶解态稀土元素La、Ce、Nd、Pr、Gd、Dy、Sm、Er、Yb、Ho、Tb、Eu、Tm和Lu的平均浓度分别是背景值的6.97、5.15、4.06、4.58、1.58、1.71、1.14、1.2.、1.2.、1.67、1.33、0.47、0.83和0.80倍,表明广州市周边地区地表水中稀土元素可能存在富集现象,尤其是La、Ce、Nd和Pr等轻稀土元素。空间分布特征表明,稀土元素浓度较高的区域集中在位于广州市市内的石门山、黄山鲁和白云山,推断轻稀土元素浓度可能会受到城市中剧烈的人为活动影响。单因子污染指数结果表明,研究区地表水主要受轻稀土元素(La、Ce、Pr和Nd)污染;内梅罗综合污染指数分析表明,石门山、罗浮山、白云山和黄山鲁采样区地表水中稀土元素属于重度污染水平。潜在生态风险评价结果表明,轻稀土元素La、Ce、Pr和Nd为主要污染因子,石门山、白云山和黄山鲁采样区地表水中稀土元素污染属于中度风险水平;罗浮山和帽峰山属于低风险水平。皮尔逊相关性分析显示研究区地表水中稀土元素之间存在较强的相关性;由APCS-MLR受体模型分析得出2.主要污染源(源1和源2.和未解析源(源3),源1为自然源,贡献率为80.96%~99.12.,为研究区地表水稀土元素的主要来源;源2.人为源,主要由交通运输、工业活动等引起,其贡献率为0.32.~8.67%,是研究区地表水稀土元素的第二大来源。

关键词：高度城市化地区溶解态稀土元素污染特征潜在生态风险 APCS-MLR受体模型

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