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DISRUPTION OF CHARGED DUST GRAINS IN COMETARY PLASMA ENVIRONMENTS

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中国科学院上海天文台年刊 2000年 182-185页

作者： Shi Zhidong Li Zhongyuan Chen Yao (department of earth and space science, University of science and technology of china, hefei 2.002.) (Advanced Center for earth science and Astronomy, Third World Academy of science)

The equilibrium potential and dust fragmentation criterion of fluffy dust grains in plasma are calculated for comet P/Halley . It is found that the dust grain acquires its largest negative potential and disruptive pro... 详细信息

关键词： comets - plasma - dust - charging

Correlation of coral fluorescence with nearshore rainfall and runoff in Hainan Island, South china Sea

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Progress in Natural science:Materials International 2002年第1期 43-46页

作者： PENG Zicheng, HE Xuexian, ZHANG Zhaofeng, ZHOU Jie, SHENG Liusi and GAO Hui( department of earth and space science, University of science and technology of china, hefei 2.002., china State Key Laboratory of Loess and Quaternary Geology, Institute of earth Environment, Chinese Academy of sciences, Xi' an 71004., china National Synchrotron Radiation Laboratory, University of science and technology of china, hefei 2.002., china. ) department of earth and space science，University of science and technology of china，hefei 2.002.，china State Key Laboratory of Loess and Quaternary Geology，Institute of earth Environment，Chinese Academy of sciences，Xi'an 71004.，china department of earth and space science，University of science and technology of china，hefei 2.002.，china State Key Laboratory of Loess and Quaternary Geology，Institute of earth Environment，Chinese Academy of sciences，Xi'an 71004.，china National Synchrotron Radiation Laboratory，University of science and technology of china，hefei {4.，china.

Under UV-laser excitation, the Porites coral from Longwan bay waters, Hainan Island, could emit yellow-green fluorescence. After fitting the data of the fluorescent intensity (FI) of the coral with the rainfall (RF) in nearshore area of Qionghai, a good relationship between FI and RF was found with a linear formula of RF= 889 - 4. 54.FI and a correlation coefficient of 0.78. Based on this formula, the rainfall sequence from 1982 to 1997 has been reconstructed. The peak annual rainfall is usually related to global El'nino events. By fitting the data of the fluorescent intensity and the runoff (RO), a quadric formula was obtained as RO = - 0.0279FI2 - 18.59 FI- 950.9 with a correlation coefficient of 0.74. The reconstructed runoff sequence from 1982 to 1997 coincided with the rainfall occurrence . The results indicate that flood and drought incidents in coastal areas of the south china are affected by global change to a great extent.

关键词： UV laser coral fluorescence nearshore rainfall river mouth runoff correlation analysis.

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饱和砂岩滞弹性弛豫热激活过程机理探讨

石油地球物理勘探 1998年第3期33卷 348-354页

作者：席道瑛程经毅席军中国科学技术大学地球和空间科学系

物理模型实验揭示：流体饱和度、孔隙流体的特性，地震波的频率和岩石孔隙的纵横向尺寸比对地震波的衰减都有很大的影响。本文借鉴滞弹性弛豫热激活过程的研究来描述地震波在饱和砂岩中的衰减机理。首先研究成分单一的长石砂岩在水、原... 详细信息

物理模型实验揭示：流体饱和度、孔隙流体的特性，地震波的频率和岩石孔隙的纵横向尺寸比对地震波的衰减都有很大的影响。本文借鉴滞弹性弛豫热激活过程的研究来描述地震波在饱和砂岩中的衰减机理。首先研究成分单一的长石砂岩在水、原油、油水混合液饱和条件下的弛豫特性，发现产生弛豫峰的王要原因是孔隙液体与长石砂岩孔隙界面上的相界弛豫。对于由初隙液体饱和的多孔岩石可以用普遍化的Voigt三参数模型和Cole－Cole分布描述。由于孔隙液体饱和的多孔岩石中普遍存在着多重弛豫的叠加，所以造成弛豫峰变宽。实验表明，油水混合液饱和砂岩的弛豫最宽，石油饱和砂岩比泵油饱和砂岩的分布宽度稍大，水饱和砂岩的弛豫峰较窄。

关键词：砂岩孔隙流体饱和砂岩滞弹性地震勘探

AGES, Nd AND Sr ISOTOPIC COMPOSITIONS OF THE JIAOZIYAN GABBROIC INTRUSION FROM THE NORTHERN DABIE TERRAIN

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Scientia Geologica Sinica 1998年第1期 30-36页

作者： Chen Daogong and Wu Yuanbao department of earth and space sciences, University of {4. and technology of china, hefei, 2.002.Wang Yinxi and Zhi Xiachen Center of Modern Analyses, Nanjing University, Nanjing 210093Xia Qunke department of Ear

ＡＧＥＳ，ＮｄＡＮＤＳｒＩＳＯＴＯＰＩＣＣＯＭＰＯＳＩＴＩＯＮＳＯＦＴＨＥＪＩＡＯＺＩＹＡＮＧＡＢＢＲＯＩＣＩＮＴＲＵＳＩＯＮＦＲＯＭＴＨＥＮＯＲＴＨＥＲＮＤＡＢＩＥＴＥＲＲＡＩＮＣｈｅｎＤａｏｇｏｎｇａｎｄＷｕＹｕ... 详细信息

ＡＧＥＳ，ＮｄＡＮＤＳｒＩＳＯＴＯＰＩＣＣＯＭＰＯＳＩＴＩＯＮＳＯＦＴＨＥＪＩＡＯＺＩＹＡＮＧＡＢＢＲＯＩＣＩＮＴＲＵＳＩＯＮＦＲＯＭＴＨＥＮＯＲＴＨＥＲＮＤＡＢＩＥＴＥＲＲＡＩＮＣｈｅｎＤａｏｇｏｎｇａｎｄＷｕＹｕａｎｂａｏＤｅｐａｒｔｍｅｎｔｏｆ...

关键词： Nd AND ISOTOPIC Sr AGES

U-Pb ZIRCON AGES OF THE ROCKS IN THENORTH DABIE TERRAIN, china

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Scientia Geologica Sinica 1998年第4期 501-511页

作者： Xie Zhi Cheng Jiangfeng Zhou Taixi (department of earth and space sciences, University of {4. and technology of china, hefei, 2.002.)Li Huiming Zuo Yicheng and Zhou Hongying(Tianjin institute of Geology and Mineral Resources, CAGS, Tianjin, 300170)

U-Ph zircon ages of four samples, two TTG gneisses, one metasediment and one dyke of granite-porphyryfrom North Dabie Terrain, were determined. The dates obtained suggest that the protolith emplacementtime of TTG gneiss was about 800Ma, but not in Early Cretaceous. The 120-130Ma thermal event stronglydisturbed U-Ph isotopic systematics of TTG gneisses and metasediments. But this thermal event lasted onlyfor a short time.

关键词： Pb UHP U-Pb ZIRCON AGES OF THE ROCKS IN THENORTH DABIE TERRAIN china

Mineralization at low temperature and its relation with organic substances——Taking Songxi Ag-Sb ore deposit in northeast Guangdong as an example

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Chinese science Bulletin 1999年第S2期44卷 57-58页

作者： XIAO Zhenyu~1, YANG Xiaoyong~2 and YANG Xueming~2 1. Guangdong Geol. Bureau, china Nonferrous Metals Exploration, Guangzhou 510080, china 2. department of earth and {4. sciences, University of science & technology of china, hefei 2.002., china

1 Geological setting and samples Songxi Ag-Sb ore deposit is located in the southern margin of Yongding-Mexian Paleozoic depressionof South china Caledonian orogenic belt, and the northern margin of Zhaigang Mesozoic volcanic basin,where a series of faults and folds formed with northwest tectonic directions. The sedimentary rocks arecomposed of Songling Group of low Jurassic system, Zhangping Group of middle Jurassic system and Quaternary System in which Songling Group can be divided into 3 lithostratigraphic units regionally, where thetwo of the units can be found there, i.e. the middle unit with gray-yellow quartz sandstone, fine sandstone and siltstone, and the upper with black shale and tuff, in which layered Ag-Sb ore bodies are deposited, and especially in the low part of quartz sandstone, siltstone, bioclastic limestone and the alteredbasalt are the main ore-bearing rocks. The ore bodies can be divided into two types of mineralization, i.e. bedded or bedded-like types and vein type.

关键词： low-temperature mineralization organic substances Songxi Ag-Sb ore deposit Guangdong.

Geochemical and Geochonological Constraints on the Tectonic Outline of the DabieMountains,Centralchina:AContinentMicrocontinentContinent Collision Model

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Continental Dynamics 1998年第Z1期 16-33页

作者： LI Shuguang and CHEN Yizhi department of earth and space science, University of science and technology of china, hefei, Anhui 2.002., china Jagouty EMIL department of Cosmochemistry, Max Planck Institue für Chemie, D 55020 Mainz, Germany ZHANG Zo

１ＩｎｔｒｏｄｕｃｔｉｏｎＴｈｅＱｉｎｌｉｎｇＤａｂｉｅｏｒｏｇｅｎｉｃｂｅｌｔｉｓａｃｏｌｉｓｉｏｎｚｏｎｅｂｅｔｗｅｅｎｔｈｅＮｏｒｔｈＣｈｉｎａＢｌｏｃｋ（ＮＣＢ）ａｎｄＹａｎｇｔｚｅＢｌｏｃｋ（ＹＢ）ｏｒ... 详细信息

１ＩｎｔｒｏｄｕｃｔｉｏｎＴｈｅＱｉｎｌｉｎｇＤａｂｉｅｏｒｏｇｅｎｉｃｂｅｌｔｉｓａｃｏｌｉｓｉｏｎｚｏｎｅｂｅｔｗｅｅｎｔｈｅＮｏｒｔｈＣｈｉｎａＢｌｏｃｋ（ＮＣＢ）ａｎｄＹａｎｇｔｚｅＢｌｏｃｋ（ＹＢ）ｏｒＳｏｕｔｈＣｈｉｎａＢｌｏｃｋ（Ｓ...

关键词： continental to continental collisios microcontinent UHP metamorphism geochonology Dabie

EIGHT-POINT STRAIGHT-LINE-NET-DIAGRAMS OF BINARY SIX-PHASE (n+4. MULTISYSTEMS (Ⅰ)——DERIVATION FROM NINE-POINT CLOSED-NET-DIAGRAMS

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science china Chemistry 1989年第9期32卷 1106-1116页

作者：郭其悌程伟基 Institute of Geochemistry Academia Sinica Guiyang department of earth and space sciences University of Science and Technology of China Hefei

The 9-point closed-net-diagrams of binary 6-phase multisystems contain 2 basic types ofnon-straight-line portions. Only the removal of an invariant point which is shared by all thenon-straight-line portions in a 9-point closed-net-diagram can generate an 8-point straight-line-net-diagram. All together 67 distinct 8-point straight-line-net-diagrams have been derived forbinary 6-phase multisystems. They correspondingly belong to 31 distinct 8-point straight-line-nets (namely, 31 distinct 8-point sets), showing that the previous conclusion that there existsonly one 8-point straight-line-net-diagram for binary 6-phase multisystems is incorrect.

关键词： multisystems straight-line-net-diagrams phase diagrams topology

DERIVATION OF 8-POINT STRAIGHT-LINE-NETS FOR BINARY 6-PHASE (n+4. MULTISYSTEMS

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Chinese science Bulletin 1986年第22期31卷 1581-1582页

作者：郭其悌程伟基 Institute of Geochemistry Academia Sinica Guiyang department of earth and space sciences

On the basis of the 25 9-point closed-net-diagrams given by Guo Qiti, the 8-point straight-line-net-diagrams of binary 6-phase (n+4.multisystems have been derived. Any 8-point straight-line-net-diagram constitutes part of its corresponding 9-point closed-net-diagram. It means that the removal of one appropriate invariant point from a 9-point closed-netdiagram would result in an 8-point straight-line-net-diagram. If there exists neither concave triangle(s) nor concave quadrilateral(s)in the residual part of a 9-point closed-net-

关键词： straight invariant concave triangle MULTISYSTEMS n+4 realistic neither interior eliminated