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Chinese Science Bulletin 1999年第22期44卷 2094-2098页

作者： Baofu Nie Tegu Chen zicheng peng Chinese Acad Sci S China Sea Inst Oceanol Guangzhou 510301 Peoples R China Univ Sci & Technol China Hefei 230026 Peoples R China

On the basis of construction of the growth rate thermometers by use of Ponies lutea from the northern part of the South China Sea and the hindcast sea surface temperature (SST) in the last 100 years, we reconstructed the SST series in the past 220 years in the Xisha waters and analyzed the characteristics of the climatic change of that period. The results show that

关键词： Forties lutea sea surface temperature (SST) Xisha waters.

High-precision uranium-series dating of lacustrine carbonates from Daihai Lake

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Chinese Science Bulletin 2001年第7期46卷 588-591页

作者： SUN Qianli ZHOU Jie peng zicheng LIU Weiguo Xiao Jule Institute of Earth environment Chinese Academy of SciencesXi’an 710054China Department of Earth and Space Science University of Science and Technology of ChinaHefei 230006China Institute of Geology&Geophysics Chinese Academy of SciencesBeijing 100029China

Ages of small aragonite samples retrieved from sediments from the Daihai Lake are determined by using the Thermal Ionization Mass Spectrometry (TIMS) technique. The ages of the samples range from (8740±601) to (10446±489) a, with a precision of 2%-3% for non-corrected dating ages and 4.7%-9.8% for corrected ages respectively, and are consistent within the deviation range. At about 10.5 ka BP, the grain-size of the sediments coarsens sharply, the frequency curves of grain-size distribution show coarse grain dominated single-double kurtosis, indicating cooling, decreased hydrodynamic conditions and increased wind influence procedure. This is in good agreement with previous results obtained from the Daihai Lake, which suggests that the climate was cold and the lake surface was shrinking. The TIMS ages of the sediments are therefore believed to be credible.

关键词： Daihai Lake Thermal Ionization Mass Spectrometry aragonite.

Precise timing of lacustrine gypsum in Luobubo,Xinjiang using the thermal ionization mass spectrometry U-series method

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Chinese Science Bulletin 2001年第18期46卷 1538-1541页

作者： peng zicheng LIU Weiguo ZHANG pengxi ZHANG Zhaofeng ZHOU Jie Department of Earth and Space Science University of Science and Technology of ChinaHefei 230026China Institute of Earth Environment Chinese Academy of SciencesXi’an 710054China Second Branch Institute of Salt LakesChinese Academy of SciencesXi’an 710054China

Dating techniques including gypsum dissolution in water, iron hydroxide co-precipitation with uranium and thorium and mass spectrometric determination have been investigated in this note. The ages of the gypsum samples in a CK core from Luobubo lacustrine sediments are in the range of (12.85±0.21) kaBP (4 m distance from the top core) to (153.2 ± 7.2) kaBP (49 m distance from the top core) with the relative errors of ( 1.6%-±4.7%. It indicates that the sedimental environment of the CK core was situated in the middle-late Pleistocene and Holocene periods, corresponding to 1-6 stages of oxygen isotopes in the abyssal sediments and included much information from last inter-glacial to Holocene warm periods.

关键词： thermal ionization mass spectrometry (TIMS) U-series dating gypsum mineral water dissolution environmental information.

Osmium isotope determination on mantle-derived peridotite xenoliths from Panshishan with N-TIMS

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Chinese Science Bulletin 1998年第7期43卷 573-575页

作者： Weidong Sun zicheng peng Xiachen Zhi Daogong Chen Zhaorong Wang Xinhua Zhou Univ Sci & Technol China Dept Earth & Space Sci Hefei 230026 Peoples R China Univ Sci & Technol China Third World Acad Sci Adv Res Ctr Earth Sci & Astron Hefei 230026 Peoples R China Chinese Acad Sci Inst Geol Lab Lithosphere Tecton Evolut Beijing 100029 Peoples R China

The 187Os/ 188Os ratios of spinel lherzolite xenoliths from Panshishan determined with N-TIMS are lower than that of the primitive mantle, which shows depleted mantle characteristics. Their positive correlation with Al-2O-3/MgO suggests that the geochemical behavior of trace elements Re and Os is similar to that of Al-2O-3 and MgO respectively during the magmatic evolution and Re-Os isotopic system is largely immune to mantle metasomatism. A model age of 2 8-3 4 Ga obtained by 187Os/ 188Os-Al-2O-3/MgO correlation might represent the homogeneous age of the mantle lithosphere beneath the area.

关键词： negative thermal ionization mass spectrometry osmium isotope mantle-derived peridotite xenolith.

Chemical Composition of Ancient Celadon Material(1127-1279 A.D.) from Zhejiang,China and Its Implication

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Acta Geologica Sinica(English Edition) 2006年第5期80卷 759-762页

作者： peng zicheng LEUNG Po Lau YU Peter CHENG Peikai LI Mai The School of Earth and Space Science University of Science and Technology of China Hefei Anhui 230026 Department of Physics and Material Sciences City University of Hong Kong Kowloon Hong Kong Chinese Civilisation Center City University of Hong Kong Kowloon Hong Kong

The microprobe EDXRF equipment was used for analysis of the major and trace elements in glaze layer-transitive layer-body layer of the celadon from the Altar Yao （Kiln） and Laohudong Yao in the Southern Song Dynasty （1127-1279 A.D.）, Zhejiang, China. The K values of the discriminant factor for the celadon wares are larger than 8, which means the celadon of the Altar Yao and Laohudong Yao are different from that of the Longquan Yao. The former two belong to the Guan Yao system （the Chinese imperial kilns）, but the latter to the Min Yao system （the Chinese popular kilns）. The principle component analysis shows their relationship between the Altar and Laohudong wares with provenance postulation. The thickness of the transitive layer in the Altar and Laohudong wares is obviously different, which reveals the microstructure characteristics of the celadon even though both kinds of wares belong to the imperial kiln system.

关键词： Microprobe EDXRF analysis ancient celadon chemical composition provenance

Chemical Composition of the Primitive Mantle Source of Peridotite Inclusions at Mount Lianshan, Liuhe County,Jiangsu Province

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Acta Geologica Sinica(English Edition) 1998年第2期72卷 180-190页

作者： SUN Weidong peng zicheng CHEN Daogong ZHI Xiachen WANG Zhaorong GE Ningjie Department of Earth&Space Sciences University of Science&Technology of China Advanced Centre for Earth Sciences&Astronomy The Third World Academy of SciencesHefeiAnhui Province 230026

: This paper presents a study of the major and trace element compositions of fresh mantle-derived spinel lherzolite and harzburgite inclusions from Cenozoic alkaline basalt in Mount Lianshan and Mount Panshi, Liuhe County, Jiangsu Province. An estimation is made of the contents of the major elements and some of the trace elements in the primitive mantle source region of the area, from which the authors have obtained MgO/Al2O3= 7.86. The contents of MgO and Al2O3 are also obtained as 37.58% and 4.78% respectively based on the correlation of MgO-Al2O3. Then, the contents of various elements in the primitive mantle are calculated using their regression equations with MgO, and the compositon of the primitive mantle, a basic issue in geochemistry study, is discussed on that basis.

关键词： Mount Lianshan peridotite inclusions mantle source composition of the primitive mantle

Os isotopic composition of the earth's primitive upper mantle

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Chinese Science Bulletin 1998年第18期43卷 1575-1579页

作者： Weidong Sun Xiachen Zhi zicheng peng Zhaorong Wang Ningjie Ge Xinhua Zhou Department of Earth and Space Sciences University of Science and Technology of China Hefei China Advanced Research Center on Earth Sciences and Astronomy University of Science and Technology of China Third World Academy of Sciences Hefei China Laboratory of Lithosphere Tectonic Evolution Institute of Geology Chinese Academy of Sciences Beijing China

The osmium isotopic ratio of 187Os/ 188Os ranging from 0.126 to 0.127 for the primitive upper mantle (PUM) is obtained according to the correlation between 187Os/ 188Os and Al 2O 3 of mantle-derived xenoliths and orogenic peridotites, which consists with Allegre and Luck’s ALM value and similar to Yin’s nuggets uniform reservoir (NUR) value. It shows that the Os isotope ratio is lower than enstatite or ondinary chondrites, similar to carbonaceous chondrites (CV3).

关键词： primitive upper mantle Os isotope mantle_derived peridotite.

Multi-proxy evidence for Late Pleistocene-Holocene climatic and environmental changes in Lop-Nur,Xinjiang,Northwest China

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Chinese Journal Of Geochemistry 2008年第3期27卷 257-264页

作者： LUO Chao YANG Dong peng zicheng ZHANG Zhaofeng LIU Weiguo HE Jianfeng ZHOU Chenlin School of Earth and Space Science University of Science and Technology of China Hefei 230026 China State Key Laboratory of Loess and Quaternary Geology Institute of Earth Environment Chinese Academy of Sciences Xi＇an 710054 China Department of Geology University of lllinois-Urbana Champaign Urbana IL 61801 U.S.A. Illinois State Geological Survey 615 East Peabody Drive Champaign IL61820 U.S.A.

A 10.35-m-long sediment core from the Luobei depression in Lop-Nur,Xinjiang,Northwest China,provides detailed information about environmental changes during the Late *** samples taken every 5 cm of the core were analyzed for 10 environmental proxies,including magnetic susceptibility,granularity,chroma,carbonate and loss on ignition(LOI),and pH *** chronology data are provided by the uranium/thorium disequi-librium *** sediments of the section were deposited during the last 32000 *** results of analysis of 10 proxies were examined using multivariate statistical analysis,and the principal components were *** to the results,the Late Pleistocene sequence contains four climatic and environmental stages appearing in the cycles of cold-wet and warm-dry *** 10-9 ka BP,it was the earliest warm episode in the *** changes in this district were restricted by global change,as suggested by the analysis of glacial-interglacial *** it was different from the mutative trend of a monsoon region in East China because of its own characteristics,which was the situation of cold-wet and warm-dry climate-environment *** candidate reason may be the uplift of the Tibet Plateau and the westerly wind circulation.

关键词：更新世沉积物气候变化环境代理新疆

High-precision thermal ionization mass spectrometry dating of young volcanic rocks by using U-series method

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Chinese Science Bulletin 2000年第1期45卷 83-87页

作者： WANG Fei peng zicheng CHEN Wenji WANG Zhaorong YANG Jiwu ZHANG Zhonglu HU Yutai Institute of Geology China Seismological BureauBeijing 100029China Department of Earth and Space Science China University of Science and TechnologyHefei 230026China Seismological Bureau of Yunnan Province Kunming 650000China

A high precision thermal ionization mass spectrometric (HP-TIMS) technique is used to determine 238U,234U,232Th,230Th concentrations and their ratios in whole rocks and minerals separated from Ouaternary Maanshan, Dayingshan and Heikongshan volcanic rocks of Tengchong volcanic field .Yunnan Province, China. The 238U-230Th isochrons are given, yielding four age values (227 ? 20) ka (D-1, Dayingshan), (79.6 ±5.5) ka (D-7, Dayingshan), (21.9 ± 3.0) ka (h-1, Heikongshan), and (7.5 ± 1.0) ka (M-1, Maanshan). The result is not only consistent with but also preciser than those measured by the K-Ar method and the alpha spectrometry U-series method, indicating that the HP-TIMS method is reliable and has high precision. Besides, a procedure of HP-TIMS analysis of young volcanic rocks in China is set up preliminarily.

关键词： high precision thermal ionization mass spectrometry U-series method young volcanic rock U-series age.

High-precision timing of the Quaternary standard samples with thermal ionization mass spectrometry (TIMS) U-series method

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Chinese Science Bulletin 1998年第4期43卷 333-336页

作者： peng zicheng Wang Zhaorong Sun Weidong Ma Zhibang Xia Ming Zhang Chenhui Chen Wenji Zhang Zhonglu An Zhisheng Univ Sci & Technol China Dept Earth & Space Sci Hefei 230026 Peoples R China Chinese Acad Sci Inst Geol Beijing 100029 Peoples R China State Seismol Bur Inst Geol Beijing 100029 Peoples R China State Key Lab Loess & Quaternary Geol Xian 710054 Peoples R China

Two national stalagmite standard （GBW04412, GBW04413） and one international coral standard （RKM4） have been determined by using thermal ionization mass spectrometry （TIMS） method. The values of （ 234 U/ 238 U） act , （ 230 Th/ 234 U） act and age are all consistent in error range with the standard values obtained by using α spectrometry.

关键词： thermal ionization mass spectrometry (TIMS) U_series method standard samples stalagmite and coral age determination.