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Pn Tomographic Velocity and Anisotropy beneath Western china and the Surrounding Region

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Pn Tomographic Velocity and Anisotropy beneath Western China...

中国地球物理学会第二十七届年会

作者： L(u|¨)Yan~(1,3*) Ni Sidao~(2,1) Liu Bin~1 Sun Youshun~3 1.School of earth and space sciences,University of science and {4. of china,hefei,2.002.,china 2.Key Laboratory of Dynamical Geodesy,Institute of Geodesy and Geophysics,Wuhan,4.0077,china 3.department of earth,Atmospheric and Planetary sciences,Massachusetts Institute of {4., Cambridge,Massachusetts 02139,USA

＜正＞Western china and the adjacent region include china’s Tarim Basin,the Tibetan Plateau,the Sichuan-Yunnan region,and Afghanistan,India,Myanmar,and other neighboring *** tectonics of the area is currently controlled by the collision and continuing convergence of the Indian Plate and the Eurasian *** northward movement of the Indian Plate has been widely accepted as the driving force for growth of the Tibetan plateau;however,the mechanism of subduction is still unclear and requires further *** the uppermost mantle, changes in composition,temperature,pressure and water volatile content contribute to Pn velocity ***

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安徽亳县陨石透明矿物研究

矿物学报 1987年第3期 238-244页

作者：王奎仁王俊新中国科学技术大学地球和空间科学系中国科学技术大学地球和空间科学系合肥

本文对毫县陨石透明矿物中橄榄石、辉石、长石、石英、白云石、方解石和黑云母等作了研究。以此为据讨论了毫县陨石的化学群、岩石类型、热变质作用和冲击变质作用等等。

关键词：陨石透明矿物安徽

赖氨酸水杨醛schiff碱及其镧系配合物的合成与抗O_2^(·-)活性

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稀土 2004年第1期25卷 45-47页

作者：周双生完茂林张国升周根陶安徽中医学院药学系省重点建设示范中心实验室安徽合肥230038 中国科技大学地球和空间科学系安徽合肥230026

合成了由水杨醛和赖氨酸缩合的新的氨基酸schiff碱配体以及它的镧系元素配合物。用元素分析、红外光谱,1HNMR谱、摩尔电导和差热分析等手段表征了这些化合物,并采用EPR法对这些化合物的抗超氧阴离子自由基(O2·-)的活性进行了测定。结... 详细信息

合成了由水杨醛和赖氨酸缩合的新的氨基酸schiff碱配体以及它的镧系元素配合物。用元素分析、红外光谱,1HNMR谱、摩尔电导和差热分析等手段表征了这些化合物,并采用EPR法对这些化合物的抗超氧阴离子自由基(O2·-)的活性进行了测定。结果表明,配体及其镧系配合物对O2·-有明显的清除作用,而且配合物的抗氧活性比其配体强。

关键词：赖氨酸水杨醛schiff碱镧系配合物合成超氧阴离子自由基

Precise U-series Dating of Coral Reefs from the South china Sea and the High Sea Level during the Holocene

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Precise U-series Dating of Coral Reefs from the South China ...

中国科学院地质与地球物理研究所2003学术年会

作者： Z.B.Ma+,J.L.Xiao+,X.T.Zhao+,Z.C.Peng++,M.Xia+, G.P.Zhang§,Z.R.Wang++,and Z.S.An+ +Institute of Geology and Geophysics Chinese Academy of sciences Beijing 100029,china ++department of earth and {4. sciences University of science and technology of china hefei 2.002.,china§Institute of Remote Sensing Application Chinese Academy of sciences Beijing 100101,china +Institute of earth Environment Chinese Academy of sciences Xi’an 710054.china

Coral reefs formed along the southern coast of Hainan Island are one of the most developed Holocene fringing reefs in *** present new precise Th ages of coral reefs collected from the Shuiweiling section in the southern coast of the Hainan Island,Dengloujiao in the southwest of the Leizhou Peninsula,and the Chenhang Island and Jinyin Island of the Xisha(Paracel) Islands in the South china *** the high-precision U-series dates and stratigraphic evidence,the timing and character of the sea-level variations of the middle-Holocene in study region are examined: The results show that a flourishing period of coral reef flats in the South china Sea and along its northern coasts appeared in ca.6800 to 5800 a *** is 650 to 950 years earlier than the previous C dates(6150-4.50 a).The sea level relative to the nor thern coasts of South china Sea was 3 to 4.m or more higher than that of the present during this period.

关键词： South china Sea Holocene coral reefs TIMS dating sea-level changes

Lithium isotopic composition of subduction-related leucogranites and associated rocks from the northern margin of the North china craton:Source tracking and tectonic implications

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Lithium isotopic composition of subduction-related leucogran...

中国矿物岩石地球化学学会第13届学术年会

作者： XIAO Yi-lin~1,XU Li-jun~1,GAO Yong-jun~2,LI Shu-guang~1, SUN He~1,GU Hai-ou~1 1.CAS Key Laboratory of Crust-Mantle Materials and Environments,School of earth and space sciences,University of science and {4. of china,hefei,2.002. 2.department of earth and Atmospheric sciences,University of Houston,Houston,TX 77204.USA

We report Li elemental and isotopic data for a suite of(leuco-) granitic and gneissic rocks(presumed protolith of the leucogranite) from the boundary between the North china craton(NCC) and the South china plate (SCP),which represent an important repository for understanding the Mesozoic thicken and thinning processes of the *** concentrations and isotopic compositions of leucogranites from the Bangbu area in the southern margin of the NCC show the following important characteristics:i) most samples(15 out of 19) have much lower Li concentrations but higherδ Li values compared to normal granite;ii) some samples have very low Li concentrations(around 1 ppm) but extremely heavy isotopic compositions(from 8.6 to 16.1),representing the heaviest Li isotopic compositions so far reported for granitic rocks;iii) lithium isotopic compositions of 11

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Lead isotopic study of Shang Dynasty bronzes (13-11 B.C.)and their ore sources

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Nuclear science and Techniques 2000年第2期11卷 65-71页

作者： PENG Zi-Cheng ZHANG Zhao-Feng HE Jian-Feng WANG Zhao-Rong(department of earth and space science, Univcrsity of Sciencc and {4. of china,hefei 2.002.)LIU Shi-Zhong(Jiangxi Historical Relic Archaeology Rescarch Institute, Nanchang 330003)HUA Jue-Mi department of earth and space science University of Science and Technology of ChinaHefei 230026 Jiangxi Historical Relic Archaeology Research Institute Nanchang 330003 Natural science Historical Institute the Chinese Academy of Sciences Beijing 100010

The Shang Dynasty civilization in china is based on the development of the bronze techniques. A large amount of Shang Dynasty bronzes, excavated from Jiangxi, Hubei and Henan Provinces, have become a focus of world attention. However,the Sha-ng Dynasty center was located at Zhenzhou and Allyang city areas, Henan Province, where no large copper ores have been found so far. Therefore, where did the huge ore material for casting the bronzes come from? It is an unsettled question paid attention by the archaeologists and scicntists. 35 Shang Dynasty bronzes and 21 copper and lead ore materials aged in the Shang-Zhou Dynasty, the Spring-Autumn Period and the modern time, have been measured by the use of mass *** upon lead isotopic ratios, the ore material for casting the bronzes with the middle isotopic ratios of 207Pb/206Pb ranged in 0.8～0.9 could come from the ancient copper mine of Tongling, Jiangxi Province and Tong Lushan, Hubei Province and that with the high isotopic ratios (＞0.9) could be from the northern part of the Shang Empire, called "Gongfang" in the historical records, e.g. today’s Hebei and LiaoningProvinces. The others with the low isotopic ratios (＜0.8) might originate from poly-metalic deposits, with the high isotopic ratios of 238U/204.Pb in the ore flux or in the magma.

关键词：商代青铜器铜铜矿石材料同位素比率考古商代文明来源

Precise U-series dating of coral reefs from the South china Sea and the high sea level during the Holocene

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Precise U-series dating of coral reefs from the South China ...

中国科学院地质与地球物理研究所2002学术年会

作者： Z.B.Ma~a,J.L.Xiao~a,X.T.Zhao~a Z.C.Peng~b,M.Xia~a, G.P.Zhang~c,Z.R.Wang~b,and Z.S.An~d a.Institute of Geology and Geophysics,Chinese Academy of sciences,Beijing 100029,china b.department of earth and {4. sciences,University of science and technology of china,hefei 2.002.,china c.Institute of Remote Sensing Application,Chinese Academy of sciences,Beijing 100101,china d.Institute of earth Environment,Chinese Academy of sciences,Xi’an 710054.china

Coral reefs formed along the southern coast of Hainan Island are one of the most developed Holocene fringing reefs in *** present new precise

关键词： South china Sea Holocene coral reefs TIMS dating sea-level changes

Petrogenesis and magma residence time of lavas from Tengchong volcanic field(china):evidence from U-series disequilibria and 4.Ar/39Ar dating

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Petrogenesis and magma residence time of lavas from Tengchon...

中国科学院地质与地球物理研究所2006学术年会

作者： Fei WANG State Key Laboratory of Lithosphere Tectonic Evolution,Institute of Geology and Geophysics,Chinese Academy of sciences,Beijing 100029,china Zicheng PENG department of earth and {4. sciences,china University of science and technology,hefei 2.002., china Rixiang ZHU Huaiyu HE Liekun YANG State Key Laboratory of Lithosphere Tectonic Evolution,Institute of Geology and Geophysics,Chinese Academy of sciences,Beijing 100029,china

We present U-Th disequilibria measurements as well as radiogenic and trace element data for volcanic rocks erupted over the past～200,000 years at Tengchong volcano field(TVF), near the collisional belt of India-Asia,Southwestern *** separates,matrix and whole rock were analyzed separately by mass spectrometry for Th-U *** rocks are characterized either by Th enrichment or depletion relative to *** mineral internal Th age isochrons and a CO-laser Ar/Ar age were determined.A difference of 0 ka between the Th age and the Ar/Ar age can be interpreted as the residence time of the associated magma. Large variations in Sr,Nd,and Pb isotopic compositions and trace element ratios suggest more than one source for the TVF *** Th contents,Th/U ratios and LILE element abundances, as well as their large variations can be attributed to partial melting of mantle previously metasomatized by subduction-derived *** of U in some lavas could be the feature of another end-member,an arc-type melt,in the *** extraction of the melts may result in the observed chemical disequilibrium.

关键词： Tengchong volcanoes 230Th-238U disequilibria Petrogenesis 4.Ar/39Ar dating

不同助剂的硫化MoO_3/ZrO_2催化剂上CO加氢合成低碳混合醇的反应性能

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燃料化学学报 1993年第1期21卷 27-33页

作者：伏义路姜明卞国柱杜月中姜伟中国科技大学近代化学系合肥230026

研究了碱金属离子(Li^+、Na^+、K^+、Cs^+)和碱土金属离子(Ca^(2+)、Sr^(2+)、Ba^(2+))为助剂的硫化MoO_3/ZrO_2催化剂上CO加氢合成低碳混合醇的反应性能。碱金属离子(Li^+,K^+)、特别是钾离子为助剂的催化剂比之碱土金属离子助剂具有... 详细信息

研究了碱金属离子(Li^+、Na^+、K^+、Cs^+)和碱土金属离子(Ca^(2+)、Sr^(2+)、Ba^(2+))为助剂的硫化MoO_3/ZrO_2催化剂上CO加氢合成低碳混合醇的反应性能。碱金属离子(Li^+,K^+)、特别是钾离子为助剂的催化剂比之碱土金属离子助剂具有更好的合成低碳醇的活性和选择性。从一系列的实验和分析发现,硫化K-MoO_3/ZrO_2的合成低碳醇的活性和选择性强烈依赖于钾助剂的含量和反应条件。合理选择最佳K/Mo比(～0.5原子比)、反应压力、温度和空速可以获得较好的合成醇活性和选择性。

关键词：钼基催化剂助剂混合醇氢化