Estimation of annual actual evapotranspiration from nonsaturated land surfaces with conventional meteorological data   总被引：1，自引：0，他引：1  

QIU Xinfa  ZENG Yan  MIAO Qilong & YU Qiang . Department of Geography  Nanjing Institute of Meteorology  Nanjing  China  . Institute of Geographic Sciences  Natural Resources Research  Chinese Academy of Sciences  Beijing  China 《中国科学D辑(英文版)》2004,47(3)

Land surface evapotranspiration is an important component both in earth surface heat and water bal-ance, on whose budgets weather and climate depend, to a great extent, for their changes are responsible for the formation and variation of vegetation features on the globe. Besides, the evapotranspiration is an im-portant topic of short-term flood forecasting and the estimation of runoff from mountainous sides. As a result, the problem as to the evapotranspiration has been one of the concerns in …  相似文献   

Discovery and analysis of ultra-micro grinding grain texture in slipping lamellae of ductile-brittle zone     

GE Heping  SUN Yan  LU Xiancai  ZHU Wenbin  GUO Jichun  LIU Deliang & Chi-yuen Wang . Department of Earth Sciences  Nanjing University  State Key Laboratory of Mineral Deposit  Nanjing  China  . Department of Earth  Space Sciences  University of Science  Technology of China  Hefei  China  . Department of Geology  Geophysics  University of California  Berkeley  CA  USA 《中国科学D辑(英文版)》2004,47(3)

In the 1990s of the 20th century, we participated in the research of the stress field in fissure tectonics of scientific deep bore cores for the Deep Observation and Sampling of the Earths Continental Crust (DOSECC for short). Spherical and enriched ul-tra-micro granular textures (nm size), which enriches Nb element (Wang & Sun, 1990; Sun & Wang, 1993)[1,2], were found during the observation of ul-tra-micro slipping lamellae of ductile and brittle oc-curring in Late Mesozoic granites us…  相似文献   

Age of Yingfeng rapakivi granite pluton on the north flank of Qaidam and its geological significance   总被引：2，自引：0，他引：2  

XIAO Qinghui  LU Xinxiang  WANG Fei  SUN Yangui  Wei Xiangdong  XlNG Zuoyun 《中国科学D辑(英文版)》2004,47(4)

Rapakivi granite is a very rare and special type of rocks in the crust. Nearly all the typical Proterozoic rapakivi occurred in stable craton, and was regarded as representing special anorogenic settings and rifting events of the supercontinents. Therefore, rapakivi has constantly been attracting the attention of researchers from various countries[15]. For example, the Protero- zoic rapakivi granites occurring in Miyun, Beijing, has been studied in detail by the researchers both at home and …  相似文献   

Geochemistry of the subduction-related magmatic rocks in the Dahong Mountains, northern Hubei Province——Constraint on the existence and subduction of the eastern Mianle oceanic basin     

DONG Yunpeng  ZHANG Guowei  ZHAO Xia  YAO Anping & LIU Xiaoming The Key Laboratory of Continental Dynamics  Ministry of Education  Department of Geology  Northwest University  Xi抋n  China 《中国科学D辑(英文版)》2004,(4)

Being a composite collisional orogen between North China and South China blocks, the Qinling orogenic belt is the key to understand the composite combination, prolonged evolutionary history and their continental dynamics. The main suture between north and south Qinling, called Shangdan suture zone (SDSZ), had been studied in detail for about twenty years. Recently, another suture zone, called Mianl黣 suture zone (MLSZ), has been identified in the Qinling Mountains. It is characterized b…  相似文献   

Stability of arsenopyrite and As(III) in low-temperature acidic solutions   总被引：1，自引：0，他引：1  

YU Yunmei  ZHU Yongxuan & GAO Zhenmin Key Laboratory of Ore Deposit Geochemistry  Chinese Academy of Sciences  Guiyang  China 《中国科学D辑(英文版)》2004,47(5)

Arsenopyrite is one of the most important pri-mary arsenic mineral. In the Eh-pH diagram of the As-O2-S-H2O system, if the total arsenic concentration (TAs) is taken to be 0.75 mg/L, the total sulfur con-centration, 32 mg/L, the temperature, 25℃and the pressure, one atmosphere pressure for the discrimina-tion of arsenic species, it may be found that under hy-pergene conditions, arsenopyrite is a moderately stable mineral. Only in the strongly alkaline and reducing environment can arsenopy…  相似文献   

Determination of paleo-pressure for a natural gas pool formation based on PVT characteristics of fluid inclusions in reservoir rocks——A case study of Upper-Paleozoic deep basin gas trap of the Ordos Basin   总被引：1，自引：2，他引：1  

MI Jingkui    XIAO Xianming  LIU Dehan  & SHEN Jiagui .State Key Laboratory of Organic Geochemistry  Guangzhou Institute of Geochemistry  Chinese Academy of Sciences  Guangzhou  China  .Institute of Sedimentary Mineral  Resources  Department of Civil Engineering  Xiangtan Polytechnic University  Xiangtan  China 《中国科学D辑(英文版)》2004,(6)

~~Determination of paleo-pressure for a natural gas pool formation based on PVT characteristics of fluid inclusions in reservoir rocks——A case study of Upper-Paleozoic deep basin gas trap of the Ordos Basin~~  相似文献   

Carbon isotopic studies of individual lipids in organisms from the Nansha sea area, China   总被引：2，自引：0，他引：2  

DUAN Yi    SONG Jinming & ZHANG Hui . Lanzhou Institute of Geology  Chinese Academy of Sciences  Lanzhou  China  . School of Geology  Lanzhou University  Lanzhou  China  . Institute of Oceanology  Chinese Academy of Sciences  Qingdao  China 《中国科学D辑(英文版)》2004,47(7):593-598

Sediments contain abundant lipid compounds in general, which are used as biomarker compounds to study organic matter sources and reconstruct the pa-laeoenvironments[1—7]. However, lipid compounds in sediments are generally a mixture of various genetic components so that it is difficult to correctly decouple their biological sources only by the results of bio-chemical researches. Carbon isotopic studies of indi-vidual sedimentary lipid compounds can discover their genetic information, which pr…  相似文献   

~(40)Ar/~(39)Ar dating of shear deformation of the Xianshuihe fault zone in west Sichuan and its tectonic significance   总被引：6，自引：1，他引：6  

ZHANG Yueqiao  CHEN Wen  & YANG Nong . Institute of Geomechanics  Chinese Academy of Geological Sciences  Beijing  China  . Institute of Geology  Chinese Academy of Geological Sciences  Beijing  China  . Institute of Geology  Geophysics  Chinese Academy of Sciences  Beijing  China 《中国科学D辑(英文版)》2004,47(9)

TheNW-SEstrikingXianshuihefaultzoneslicesthesoutheasternTibetanPlateauandconnectssoutheastwardwiththeAnninghe-Zemuhe-Xiaojiangfaultzone,whichformahuge,activesinistralstrike-slipfaultzone(fig.1).ThisfaultzoneisanimportantseismicfaultineastTibet[1-5].EarthquakegeologystudiesandoffsetpatternsofyounggeologicalfeatureshaveshownthatlateQuaternarysinistralsliprateoftheXianshuihefaultzonereaches13mm/a[1,2].TheXianshuhefaultzoneconsistsoftwomainbranches,theDaofufaultbranchinthewestandtheXianshuih…  相似文献   

The Present Space-Time Motion and Deformation Features of the Northeastern Margin of the Qinghai-Xizang（Tibet） Block and Its Adjacent Area     

Zhang Xiaoliang 《中国地震研究》2004,18(2):161-170

On the basis of Discontinuous Deformation Analysis (DDA), and considering the moderate intrusion of specific block boundaries to different extents, the first-order block motion model is established for the northeastern margin of Qinghai-Xizang(Tibet) block and the kinematical model for depicting deformation of small regions as well by using GPS observations of three periods (1991, 1999 and 2001). By simulating, we obtained the motion features of the firstorder blocks between the large WWN faults on the sides of the studied region, the distribution features of the principal strain rate field and the inhomogeneous motion features with spacetime of the faults in the northern boundary of the Qinghai-Xizang (Tibet) block.  相似文献   

The Rotational Structure along the Eastern Segment of the Altyn Tagh Fault and Its Implications in Dynamics     

Wang Ping 《中国地震研究》2004,18(4):327-336

As a result of the left-lateral strike-slipping of the Altyn Tagh fault in Neotectonic period, a contra-rotational structure, namely the Zhaobishan vortex structure, has developed at the juncture of the main Altyn Tagh fault and the northern fringe fault of the Qilian Mountains.Preliminary analysis on the deformation and evolution of the Zhaobishan vortex structure. In combination with the previous data, suggests that the tectonic transform between the Altyn Tagh fault and the northern fringe fault of the Qilian Mountains attributes to the deformation of the rotational structure. The existence of a series of rotational structures along the Altyn Tagh fault and on the northeastern edge of the Qinghai-Xizang(Tibet) plateau indicate that as the substance in the northern Qinghal-Xizang (Tibet) plateau moves clockwise around the eastern tectonic knot of the Himalayas, rotational structures become the principal mode on the northern marginal zone of the Plateau of transforming and absorbing tectonic deformation.  相似文献