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《Quaternary Sciences》 2013-06
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VARIATIONS OF n-ALKANES AND COMPOUND-SPECIFIC CARBON ISOTOPES IN SEDIMENT FROM HUGUANGYAN MAAR LAKE DURING THE LAST GLACIAL MAXIMUM AND HOLOCENE OPTIMUM:IMPLICATIONS FOR PALEOVEGETATION

Kuang Huanchuan;Zhou Haoda;Hu Jianfang;Yang Xiaoqiang;Peng Ping'an;Yang Hao;Jiangsu Key Laboratory of Environmental Change and Ecological Construction,School of Geography Science,Nanjing Normal University;State Key Laboratory of Organic Geochemistry,Guangzhou Institution of Geochemistry,Chinese Academy of Sciences;Department of Earth Sciences,Sun Yat-sen University;  
Huguangyan Maar Lake(21°09′N,110°17′E)is located in the Leizhou Peninsula,South China.The natural vegetation of the Huguangyan area is tropical semi-evergreen seasonal rainforest.In order to investigate the paleovegetation in Huguangyan during the Last Glacial Maximum(LGM)and the Holoeene Optimum,a sediment core(21°08′43.01″N,110°16′48.62′E)with length ca.22m was obtained during a drilling in 2011 from the lake,using a high-precision piston coring.The lithology is relatively uniform.The lithogogy is black mud,light black mud,gray black mud,dark gray black mud,gray mud,black mud and black volcanic tuff from the top of the core to the end.After drilling,core sediments were stored at 4℃ before sub-sampling.The chronology was established according to the ~(14)C-AMS data of hand-picked terrestrial leaves from the core sediments,extending back to about52kaB.P.The present study launches a full-scale investigation from 4.lm to 8.8m of the core which covers approximately from 21.lkaB.P.to 5.5kaB.P.Fifty samples were collected with lem resolution to obtain a representative organic record of the present study profile.The molecular biomarkers including n-alkanes and n-alcohols were identified from the core sediments from the Huguangyan Maar Lake.The distribution of n-alkanes was mainly discussed in this paper.The eompositions of n-alkanes are mainly consisted of long-chain n-alkanes,which is total amount of 7.1~34.5μg/g,it account for39.4%to 63.2%of the n-alkanes.The individual concentration of nC_(27),nC_(29)and nC_(31),as well as nC_(33)is 0.9μg/g to 5.8μg/g,1.7μg/g to 9.7μg/g,2.9μg/g to 11.0μg/g and 1.7μg/g to 12.9μg/g,respectively.The n-alkanes exhibit strong odd-over-even predominance between nC_(25)and nC_(33),suggesting that the n-alkanes in the lake sediments were mainly derived from terrestrial higher plants.The average chain length(ACL)of n-alkanes increased and the ratios of n-alkanes(C_(27)+C_(29))/2C_(31)decreased during the LGM,indicating that the grass vegetation was dominated in the Huguangyan Maar Lake area.The woody vegetation was dominated in the Huguangyan Maar Lake area during the Holocene Optimum as the ACL decreased and the ratios of(C_(27)+C_(29))/2C_(31)increased.The δ~(13)C values of nC_(27),nC_(29)and nC_(31),as well as nC_(33)in the sediments were-22.1‰ to-30.1‰,-25.2‰to-30.8‰,-21.4‰ to-34.2‰ and-19.6‰ to-33.7‰,indicating a mixed C_3/C_4 vegetation and dominated by C3 plants in Huangguangyan Maar Lake area during 21.1ka B.P to 5.5kaB.P.Relatively heavier δ~(13)C values of n-alkanes during the LGM indicated the spread of C_4 herbaceous plants mirroring drier climatic condition in this area.Depleted δ~(13)C values of n-alkanes during the Holocene Optimum indicated vegetation dominated by C_3 plants,suggesting that the climate was more humid and warmer in Huguangyan area.
【Fund】: 中国科学院战略性先导科技专项项目(批准号:XDA05120103);; 国家自然科学基金项目(批准号:41072264和40930106)共同资助
【CateGory Index】: P532
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【Co-citations】
China Proceedings of conference Full-text Database 10 Hits
1 LU Hou-Yuan,LIU Jia-Qi,CHU Guo-Qiang and GU Zhao-Yan, (Institute of Geology and Geophysics.Chinese Academy of Sciences.Beijing 100029) Negendank J,Schettler G and Mingram J (GeoForchuns Zentrum Potsdam D-14473 Potsdam.Germany);A STUDY OF POLLEN AND ENVIRONMENT IN THE HUGUANGYAN MAAR LAKE SINCE THE LAST GLACIATION[A];[C];2003
2 WANG ShuYun~(1+),L(U|¨) HouYuan~1,LIU JiaQi~1 & J(o|¨)rg F.W.NEGENDANK~2 1 Institute of Geology and Geophysics,Chinese Academy of Sciences,Beijing 100029,China; 2 GeoForschungsZentrum(GFZ),Section 3.3,Telegrafenberg,Potsdam D-14473,Germany;The early Holocene optimum inferred from a high-resolution pollen record of Huguangyan Maar Lake in southern China[A];[C];2008
3 Yang Xiaoping~①Shi Changxing~②Li Bingyuan~②Zhu Bingqi~①(①Key Laboratory of Cenozoic Geology and Environment,Institute of Geology and Geophysics,Chinese Academy of Sciences,Beijing 100029;②Institute of Geographic Sciences and Natural Resources Research,Chinese Academy of Sciences,Beijing 100101);SOME ASPECTS ABOUT CHINESE GEOMO RPHOLO GY:RECENT PRO GRESSES FROM AN EARTH SYSTEM SCIENCE PERSPECTIVE[A];[C];2009
4 Yin Zhiqiang~(①②) Qin Xiaoguang~①Wu Jinshui~③Ning Bo ~①(①Institute of Geology and Geophysics,Chinese Academy of Science,Beijing 100029;②China Institute of Geo-EnvironmentMonitoring,Beijing 100081;③Marine Geological Survey of Hainan Province,Haikou 570206);MULTIMODAL GRAIN-SIZE DISTRIBUTION CHARACTERISTICS AND FORMATION MECHANISM OF LAKE SEDIMENTS[A];[C];2009
5 Jia Hongjuan Qin Xiaoguang Liu Jiaqi (Key Laboratory of Cenozoic Geology and Environment,Institute of Geology and Geophysics,Chinese Academy of Sciences,Beijing 100029);ENVIRONMENTAL CHANGE OF THE PAST 10.84ka IN LOULAN,XINJIANG[A];[C];2011
6 Xie Manman~(①②) Sun Qing~③Ling Yuan~③Liu Meimei~③Yang Ke~④Yu Xiaohan~④Chu Guoqiang~①(①Key Laboratory of Cenozoic Geology and Environment,Institute of Geology and Geophysics,Chinese Academy of Sciences,Beijng 100029;②Graduate University of Chinese Academy of Sciences,Beijing 100049;③National Research Center of Geoanalysis,Beijing 100037;④Shanghai Synchrotron Radiation Facility,Shanghai Institute of Applied Physics,Chinese Academy of Science,Shanghai 201204);APPLICATION OF SYNCHROTRON RADIATION TECHNOLOGY IN HIGHRESOLUTION PALEOCLIMATIC AND PALEOENVIRONMENTAL RESEARCH[A];[C];2011
7 Yongli Wang~(a,b),Xiaomin Fang~(b,c,*),Tongwei Zhang~c,Yuanmao Li~a,Yingqin Wu~a,Daxiang He~a, Youxiao Wang~a a Key Laboratory of Petroleum Resources Research,Institute of Geology and Geophysics,Chinese Academy of Sciences,Lanzhou 730000,China b Institute of Tibetan and Plateau Research,Chinese Academy of Sciences,Beijing 100085,China c Key Laboratory of Western Resources and Environment of Education Ministry,College at Earth and Environment Sciences,University of Lanzhou,Lanzhou 730000,China;Predominance of even carbon-numbered n-alkanes from lacustrine sediments in Linxia Basin,NE Tibetan Plateau:Implications for climate change[A];[C];2011
8 Liu Qiang~①Li Qian~②Wang Luo~①Chu Guoqiang~①(①Institute of Geology and Geophysics,Chinese Academy of Sciences,Beijing 100029;②China University of Geosciences,Beijing 100083);STABLE CARBON ISOTOPE RECORD OF BULK ORGANIC MATTER FROM A SEDIMENT CORE AT MOON LAKE IN THE MIDDLE PART OF THE DAXING'AN MOUNTAIN RANGE,NORTHEAST CHINA DURING THE LAST 21ka[A];[C];2011
9 Yongli Wang~(a,b),Xiaomin Fang~(b,c,*),Tongwei Zhang~c,Yuanmao Li~a,Yingqin Wu~a,Daxiang He~a,Yuan Gao~a, Pei Meng~a,Youxiao Wang~a a Key Laboratory of Petroleum Resources Research,Institute of Geology and Geophysics,Chinese Academy of Sciences,Lanzhou 730000,China b Institute of Tibetan and Plateau Research,Chinese Academy of Sciences,Beijing 100085,China c Key Laboratory of Western Resources and Environment of Education Ministry,College at Earth and Environment Sciences,University of Lanzhou,Lanzhou 730000,China;Distribution of biomarkers in lacustrine sediments of the Linxia Basin,NE Tibetan Plateau,NW China:Significance for climate change[A];[C];2013
10 Junyi Ge~(a,b,*),Ying Dai~(a,c),Zhongshi Zhang~(d,e,f),Deai Zhao~a,Qin Li~a,Yan Zhang~a,Liang Yi~g,Haibin Wu~a, Frank Oldfield~h,Zhengtang Guo~a a Key Laboratory of Cenozoic Geology and Environment,Institute of Geology and Geophysics,Chinese Academy of Sciences,Beijing 100029,China b The Laboratory of Human Evolution,Institute of Vertebrate Palaeontology and Palaeoanthropology,Chinese Academy of Sciences,Beijing 100044,China c Institute of Tibetan Plateau Research,Chinese Academy of Sciences,Beijing 100101,China d Bjerknes Centre for Climate Research,Allegaten 55,5007 Bergen,Norway e UNI Research,Allegaten 55,5007 Bergen,Norway f Nansen-Zhu International Research Center,Institute of Atmospheric Physics,Chinese Academy of Sciences,Beijing 100029,China g State Key Laboratory of Lithospheric Evolution,Institute of Geology and Geophysics,Chinese Academy of Sciences,Beijing 100029,China h School of Environmental Sciences,University of Liverpool,Liverpool L69 7ZT,UK;Major changes in East Asian climate in the mid-Pliocene:Triggered by the uplift of the Tibetan Plateau or global cooling?[A];[C];2014
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