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Journal of Earth Science 2016年第3期27卷 412-424页

作者： Xiaowan Xing Yuejun wang Yuzhi Zhang State Key Laboratory of Isotope geochemistry Guangzhou Institute of GeochemistryChinese Academy of SciencesGuangzhou 510640China School of Earth Science and Geological Engineering Sun Yat-sen UniversityGuangzhou 510275China University of Chinese Academy of Sciences Beijing 100049China CAS Center for Excellence in Tibetan Plateau Earth Sciences Beijing 100101China

The Wuliangshan Group occurs to the east of the Lancang giant igneous zone in SW Yunnan, and is mainly composed of low-grade metamorphosed sedimentary rocks. The group has been considered as the syn-orogenic product of the Baoshan with Simao-Indochina blocks. However, its depositional time and provenance remain to be poorly constrained. This paper presents zircon U-Pb dating and Lu-Hf-isotopic data for five representative sandstone samples from the Wuliangshan Group. The detrital grains yield a major age-peak at ~2.9 Ma, and four subordinary age-peaks at ~1 859, ~941, ~788, and ~447 Ma, respectively. Our results suggest that the Wuliangshan metasedimentary sequence was deposited after Middle Triassic rather than previously-thought Cambrian. The detrital zircon age spectrum, along with in-situ Lu-Hf isotopic data suggest that the Wuliangshan Group might be a syncollisional sedimentary product related to the collision of Baoshan with Simao-Indochina blocks. It is inferred that the provenance of the Wuliangshan Group is mainly from the Simao/Yangtze blocks to the east rather than the Baoshan Block or Lancang igneous zone to the west.

关键词： detrital zircon U-Pb dating Lu-Hf isotopic composition Wuliangshan sandstone sequence Middle Triassic Simao-Indochina

湛江湖光岩玛珥湖沿岸植物正构烷烃分布特征及其H同位素组成

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地球化学 2024年第2期53卷 246-256页

作者：陈静怡罗涛詹兆文王遥平宋之光广东海洋大学化学与环境学院广东湛江524088 中国科学院广州地球化学研究所广东广州510640 南方海洋科学与工程广东省实验室(湛江) 广东湛江524013 广东海洋大学深圳研究院广东深圳518120

从湛江湖光岩玛珥湖沿岸随机采集主要的草本和木本植物,分析其叶蜡正构烷烃分布特征及单体H同位素(δ^(2.H)。结果表明,湖光岩玛珥湖沿岸植物叶蜡正构烷烃主要由长链烷烃(n-C2.~n-C31)组成,具有明显的奇偶优势;平均碳链长度(ACL值)与碳... 详细信息

从湛江湖光岩玛珥湖沿岸随机采集主要的草本和木本植物,分析其叶蜡正构烷烃分布特征及单体H同位素(δ^(2.H)。结果表明,湖光岩玛珥湖沿岸植物叶蜡正构烷烃主要由长链烷烃(n-C2.~n-C31)组成,具有明显的奇偶优势;平均碳链长度(ACL值)与碳优势指数(CPI值)呈负相关关系;不同种类植物之间的正构烷烃δ^(2.H值差异明显,木本植物正构烷烃的δ^(2.H值(-2.7‰~-107‰)比草本植物(-2.2.~-94‰)低,可能与它们的内在特性和所利用的土壤水深度有关。通过对比不同生境下低、中、高纬度地区湖泊沿岸植物叶蜡正构烷烃δ^(2.H值发现,低纬度热带、亚热带地区的植物叶蜡正构烷烃具有更长的链长和更高的δ^(2.H值,但植物与降水之间的δ^(2.H分馏值随纬度变化相对恒定(约-12.‰),说明湖泊生境沉积叶蜡正构烷烃单体δ^(2.H值是具有较大潜力的古水文代用指标。

关键词：玛珥湖陆生植物正构烷烃 H同位素

Advances in Isotope Geochronology and Isotope geochemistry:A Preface

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Journal of Earth Science 2022年第1期33卷 1-4页

作者： Xiangkun Zhu Zaicong wang Huayong Chen MLR Key Laboratory of Isotope Geology Institute of Geology Chinese Academy of Geological Sciences State Key Laboratory of Geological Processes and Mineral Resources School of Earth Sciences China University of Geosciences Key Laboratory of Mineralogy and Metallogeny Guangzhou Institute of Geochemistry Chinese Academy of Sciences

Isotope geochronology and isotope geochemistry are important branches of geochemistry. They are based on variations in radiogenic or stable isotope ratios of elements and provide key chemical fingerprints to understand dynamic evolution of the Earth and other planetary bodies from the past to the present, and from their interior to exterior systems.

关键词： isotope geochemistry planetary

Determining the Main Gas-generation Phase of Marine Organic Matters in Different Occurrence States using the Kinetic Method

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Acta Geologica Sinica(English Edition) 2008年第1期82卷 197-205页

作者： wang Yunpeng ZHAO Changyi wang Zhaoyun wang Hongjun ZOU Yanrong LIU Jinzhong ZHAO Wenzhi LIU Dehan LU Jialan State Key Laboratory of Organic geochemistry Guangzhou Institute of Geochemistry Chinese Academy of Sciences Guangzhou 510640 China Research institute of Petroleum Exploration and Development PetroChina Beijing 100083 China

This paper probes the determination of the main gas-generation phase of marine organic mattes using the kinetic method. The main gas-generation phase of marine organic matters was determined by coupling the gas generation yields and rates in geological history computed by the acquired kinetic parameters of typical marine organic matters （reservoir oil, residual bitumen, lowmaturity kerogen and residual kerogen） in both china and abroad and maturity by the EasyRo（%） method. Here, the main gas-generation phase was determined as Ro%=1.4%-2.4% for type Ⅰ kerogen, Ro%=1.5-3.0% for low-maturity type Ⅱ kerogen, Ro%=1.4-2.8% for residual kerogen, Ro%=1.5-3.2. for residual bitumen and Ro%=1.6-3.2. for reservoir oil cracking. The influences on the main gas-generation phase from the openness of the simulated system and the ＂dead line＂ of natural gas generation are also discussed. The results indicate that the openness of simulation system has a definite influence on computing the main gas-generation phase. The main gas-generation phase of type Ⅱ kerogen is Ro%=1.4-3.1% in an open system, which is earlier than that in a closed system. According to our results, the ＂dead line＂ of natural gas generation is determined as Ro=3.5 % for type Ⅰ kerogen, Ro=4.4-4.5% for type Ⅱ kerogen and Ro=4.6% for marine oil. Preliminary applications are presented taking the southwestern Tarim Basin as an example.

关键词： marine organic matter kerogen oil cracking hydrocarbon generating kinetics main gasgeneration phase southwestern Tarim Basin gas source kitchen

The recognition of adakite-type gneisses in the North Dabie Mountain and its implication to ultrahigh pressure metamorphic geology

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Chinese Science Bulletin 2000年第21期45卷 1927-1933页

作者： wang Qiang XU Jifeng wang Jianxin ZHAO Zhenhua wang Renjing QIU Jiaxiang XIONG Xiaolin SANG Longkang PENG Lianhong guangzhou institute of{2. Chinese Academy of SciencesGuangzhou 510640China Huhei Regional Geological Survey Wuhan 430000China china University of Geosciences Wuhan 430074China

Adakite is an igneous rock generated by the partial melting of subducting ocean slab in an island arc setting. Meanwhile, residuals of the slab-melting are transformed to eclogite or garnet-amphibolite during a slab subduction process. This note reports the adakite-type grey gneisses discovered in the North Dabie Mountain. These adakitic rocks are characterized by high AI2.3(14.97%-17.56%), Sr (545-941 μg/g), Sr/Y (44.71-2.8.98), La/Yb (16.70-97.50), and low Y (3.32.12.19μg/g), Yb (0.31-1.34 μg/g), Sc (0.92.4.2.g/g), as well as positive Sr anomaly but absent or positive Eu anomaly. They are different from the low aluminum grey gneisses with low AI2.3 (13.73%-14.38%), Sr (2.2.409 μg/g), Sr/Y (6.46-15.97) and La/Yb (1.90-2..60), high Y(2..79-36.2. μg/g), Yb (2.00-5.59 μg/g) , Sc (8.30%-12.70%), and negative Sr, Eu anomaly in the North Dabie Mountain. The adakite-type grey gneisses in the North Dabie Mountain were most probably formed by the partial melting of subducting ocean slab before the

关键词： adakite-type grey gneisses ultrahigh pressure metamorphism Dabie Mountain geochemistry tectonic setting.

Permian integrative stratigraphy and timescale of china

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Science china Earth Sciences 2019年第1期62卷 154-188页

作者： Shuzhong SHEN Hua ZHANG Yichun ZHANG Dongxun YUAN Bo CHEN Weihong HE Lin MU Wei LIN Wenqian wang Jun CHEN Qiong WU Changqun CAO Yue wang Xiangdong wang State Key Laboratory of Palaeobiology and Stratigraphy Nanjing Institute of Geology and Palaeontology and Center for Excellence in Life and Paleoenvironment Chinese Academy of Sciences Centre for Research and Education on Biological Evolution and Environment Nanjing University State Key Laboratory of Biogeology and Environmental Geology School of Earth Sciences China University of Geosciences CAS Key Laboratory of Economic Stratigraphy and Palaeogeography Nanjing Institute of Geology and Palaeontology and Center for Excellence in Life and Paleoenvironment Chinese Academy of Sciences University of Chinese Academy of Sciences State Key Laboratory of Isotope geochemistry Guangzhou Institute of Geochemistry Chinese Academy of Sciences

A series of global major geological and biological events occurred during the Permian Period. Establishing a highresolution stratigraphic and temporal framework is essential to understand their cause-effect relationship. The official International timescale of the Permian System consists of three series(i.e., Cisuralian, Guadalupian and Lopingian in ascending order) and nine stages. In china, the Permian System is composed of three series(Chuanshanian, Yansingian and Lopingian) and eight stages, of which the subdivisions and definitions of the Chuanshanian and Yangsingian series are very different from the Cisuralian and Guadalupian series. The Permian Period spanned ～47 Myr. Its base is defined by the First Appearance Datum(FAD) of the conodont Streptognathodus isolatus at Aidaralash, Kazakhstan with an interpolated absolute age 2.8.9±0.15 Ma at Usolka, southern Urals, Russia. Its top equals the base of the Triassic System and is defined by the FAD of the conodont Hindeodus parvus at Meishan D section, southeast china with an interpolated absolute age 2.1.902.0.02. Ma. Thirty-five conodont, 2. fusulinid, 17 radiolarian and 2. ammonoid zones are established for the Permian in china, of which the Guadalupian and Lopingian conodont zones have been served as the standard for international correlation. The Permian δ13 Ccarbtrend indicates that it is characterized by a rapid negative shift of 3–5‰ at the end of the Changhsingian, which can be used for global correlation of the end-Permian mass extinction interval, but δ13 Ccarbrecords from all other intervals may have more or less suffered subsequent diagenetic alteration or represented regional or local signatures only. Permian δ18 Oapatitestudies suggest that an icehouse stage dominated the time interval from the late Carboniferous to Kungurian(late Cisuralian). However, paleoclimate began to ameriolate during the late Kungurian and gradually shifted into a greenhouse-dominated stage during the *** Changhsi

关键词： Permian timescale global correlation biostratigraphy chemostratigraphy

Ionic composition of submicron particles(PM_(1.0)) during the long-lasting haze period in January 2.13 in Wuhan, central china

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Journal of Environmental Sciences 2014年第4期26卷 810-817页

作者： Hairong Cheng Wei Gong Zuwu wang Fan Zhang Xinming wang Xiaopu Lv Jia Liu Xiaoxin Fu Gan Zhang Department of Environmental Engineering School of Resource and Environmental Sciences Wuhan University State Key Laboratory for Information Engineering in Surveying Mapping and Remote Sensing Wuhan University State Key Laboratory of Organic geochemistry Guangzhou Institute of Geochemistry Chinese Academy of Sciences

In January 2.13, a long-lasting severe haze episode occurred in Northern and Central china; at its maximum, it covered a land area of approximately 1.4 million km2. In Wuhan, the largest city in Central china, this event was the most severe haze episode in the 2.st century. Aerosol samples of submicron particles （PMI.o） were collected during the long-lasting haze episode at an urban site and a suburban site in Wuhan to investigate the ion characteristics of PMi.0 in this area. The mass concentrations of PM1.0 and its water-soluble inorganic ions （WSIIs） were almost at the same levels at two sites, which indicates that PM1.0 pollution occurs on a regional scale in Wuhao. WSIIs （Na^＋, NH4^＋, K^＋, Mg^2., Ca^2., Cl^-, NO3 and SO2.） were the dominant chemical species and constituted up to 48.4% and 47.4% of PM1.0 at WD and TH, respectively. The concentrations of PM1.0 and WSIIs on haze days were approximately two times higher than on normal days. The ion balance calculations indicate that the particles were more acidic on haze days than on normal days. The results of the back trajectory analysis imply that the high concentrations of PM1.0 and its water-soluble inorganic ions may be caused by stagnant weather conditions in Wuhan.

关键词： PM1.0 water-soluble inorganic ions haze source back trajectory

Composition, source, mass closure of PM_(2.5) aerosols for four forests in eastern china

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Journal of Environmental Sciences 2010年第3期22卷 405-412页

作者： Li Li Wu wang Jialiang Feng Dongping Zhang Huaijian Li Zeping Gu Bangjin wang Guoying Sheng Jiamo Fu institute of Environmental Pollution and Health School of Environmental and Chemical Engineering Shanghai University Shanghai 200444 China. College of Resources and Environment Sichuan Agricultural University Ya'an 625014 China State Key Laboratory of Organic geochemistry Guangzhou Institute of Geochemistry Chinese Academy of Sciences Guangzhou 510640 China

PM2.5 aerosols were collected in forests along north latitude in boreal-temperate, temperate, subtropical and tropical climatic zones in eastern china, i.e., Changbai Mountain Nature Reserve （CB）, Dongping National Forest Park in Chongming Island （CM）, Dinghu Mountain Nature Reserve （DH）, Jianfengling Nature Reserve in Hainan Island （HN）. The mass concentrations of PM2.5, organic carbon （OC）, elemental carbon （EC）, water soluble organic carbon （WSOC） as well as concentrations of ten inorganic ions （F？, Cl？, NO3？, SO42., C2.42., NH4＋, Na＋, K＋, Ca2., Mg2.） were determined. Aerosol chemical mass closures were achieved. The 2.-hr average concentrations of PM2.5 were 38.8, 89.2. 30.4, 18 μg/m3 at CB, CM, DH and HN, respectively. Organic matter and EC accounted for 2.%–33% and 1.3%–2.3% of PM2.5 mass, respectively. The sum of three dominant secondary ions （SO42., NO3-, NH4＋） accounted for 44%, 50%, 45% and 16% of local PM2.5 mass at CB, CM, DH and HN, respectively. WSOC comprised 35%–65% of OC. The sources of PM2.5 include especially important regional anthropogenic pollutions at Chinese forest areas.

关键词： PM2.5 aerosols forests OC/EC WSOC inorganic ions

Catchment environmental change over the 2.th Century recorded by sedimentary leaf wax n-alkane δ^(13)C off the Pearl River estuary

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Science china Earth Sciences 2016年第5期59卷 975-980页

作者： XU ShenDong ZHANG Jie wang XianXu JIA GuoDong Key Laboratory of Marginal Sea Geology Guangzhou Institute of Geochemistry Chinese Academy of Sciences Key Laboratory of Marine Chemistry Theory and Technology Ministry of Education Ocean University of China State Key Laboratory of Marine Geology Tongji University

The compound-specific stable carbon isotope compositions(δ^(13)C) of leaf wax n-alkanes from two short sediment cores recovered off the Pearl River estuary(PRE) were analyzed to check for their capability of indicating decadal scale catchment environmental change. Sedimentary long-chain n-alkanes exhibited an odd-over-even predominance, with a maximum at n-C_(2.) or n-C_(31), indicating their leaf wax origin was from vascular plants. The δ^(13)C values of C_(2.) and C_(31) n-alkane in all the sediment samples were in the range of -2..8‰ to -31.2., consistent with the C_3 plant-dominated vegetation in the Pearl River catchments. The time series of δ^(13)C records from the two cores were comparable and displayed a decreasing trend from the early 2. th century to the end of the 1970s, followed by a reversal in that change leading to continued increase for ca. 15 years. After being corrected for the effect of atmospheric CO_2.rise and δ^(13)C_(atm) decline, the δ^(13)C_(2.) records largely retained their raw changing pattern; the post-1980 increase being more conspicuous. The slightly decreasing trend in corrected δ^(13)C records before around 1980 may have been caused by an increase in precipitation, whereas the subsequent increase of δ^(13)C is likely associated with the observed dry climate and/or intensive anthropogenic deforestation. Our results thus demonstrate that leaf wax n-alkanes buried in the sediments off the PRE may well reflect change in the regional climate and/or human activity in the river catchments over the past century.

关键词： Leaf wax n-alkanes compound-specific δ^(13)C values environmental change Pearl River estuary

Chronology and geochemistry of the Nadingcuo Volcanic Rocks in the Southern Qiangtang Region of the Tibetan Plateau:Partial Melting of Remnant Ocean Crust along the Bangong-Nujiang Suture

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Acta Geologica Sinica(English Edition) 2010年第6期84卷 1461-1473页

作者： wang Baodi CHEN Jianlin XU Jifeng wang Liquan ZENG Qinggao DONG Yanhui Chengdu institute of Geology and Mineral Resources Chengdu 610081 China Key Laboratory of Geochronology and geochemistry Guanzhou Institute of Geochemistry Chinese Academy of Sciences Guangzhou 510640 China Regional Geological Surveying Party of the Tibet Bureau of Geology and Exploration Lhasa 851400 China The Second institute ofOceangraphy SOA Hangzhou 310012 China

The Nadingcuo high-K calc-alkaline rocks mainly composed of trachyte and trachyandesite are the largest outcrop area of volcanic rocks in southern Qiangtang terrane in the Tibetan plateau. However,their exact source and peterogenesis are still debated.^（40）Ar-^（39）Ar and LAM-ICPMS zircon U-Pb isotopic dating confirm that these rocks erupted in *** addition,the Nadingcuo volcanic rocks are characterized by high Sr/Y content ratios,similar with the adakite derived from partial melting of oceanic *** can be further classified as high Mg~#（Mg~#=48-57） and low Mg~# （Mg~#=33-42. *** Nadingcuo adakitic rocks have relatively low（^（87）Sr/^（86）Sr）_i and highε_（Nd）（t）, showing a trend of similarity to the Dongcuo ophiolite present in the Bangong-Nujiang oceanic crust. Simple modeling indicates that the Nadingcuo adakitic rocks are a mix resulting from the basalt of Bangong-Nujiang Ocean with 10%-2.%crustal material of Lhasa *** these bases we suggest that the low Mg~# Nadingcuo adakitic rocks are the product of partial melting of remnant oceanic crust with small sediment,and the high Mg~# rocks are the result of reaction between rising melt of remnant oceanic crust with subducted sediment and mantle ***,the origin of Nadingcuo adakitic rocks may be related to intracontinental subduction triggered by collision of India-Asia during Cenozoic.

关键词： intracontinental subduction adakitic rocks remnant oceanic crust Nadingcuo Qiangtang Tibetan plateau