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Tectono-Stratigraphic Analysis and Geodynamic Background of Mesozoic Songliao Basin

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Journal of Earth Science 1997年第1期16卷 35-39页

作者：  Xie Xinong Jiao Yangquan faculty of Earth resources, china university of geosciences, wuhan 43.074

? The Songliao basin, an important petroliferous Mesozoic basin in Northeast china, is composed of two prototypes of basins, the lower one was dominated by rifting, resulted in the formation of nearly 40 faulted basins; the upper one was dominated by the thermalinduced subsidence. Based on the regional tectonic events and sequence boundary surfaces, three tectonic sequences and eleven sequences are recognized in the basin. The deep process is a direct driving mechanism of the formation of the Mesozoic Songliao basin.

关键词： sequence stratigraphy tectonic evolution Songliao basin.

Application of GIS to Geological Information Extraction

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Journal of Earth Science 2000年第2期19卷 91-93页

作者： Cao Yu Hu Guangdao Ma Hongchao faculty of Earth resources, china university of geosciences, wuhan 43.074

GIS, a powerful tool for processing spatial data, is advantageous in its spatial overlaying. In this paper, GIS is applied to the extraction of geological information. Information associated with mineral resources is chosen to delineate the geo anomalies, the basis of ore forming anomalies and of mineral deposit location. This application is illustrated with an example in Weixi area, Yunnan Province.

关键词： geological information GIS extraction application.

Behavioral Diversity and Complexity Indicated by Metazoan Traces at a Topological Level since Proterozoic

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Journal of Earth Science 2000年第3期19卷 118-124页

作者： Gong Yiming faculty of Earth Sciences, china university of geosciences, wuhan 43.074, china

On the basis of topological criteria, metazoan traces can be classified as four ichnoorders (clusters) and twenty two ichnofamilies (kinds), which consist of nine basic and three combined topological configurations. At a topological level, the behavioral diversity and complexity indicated by metazoan traces have remained quite stable since the Early Cambrian. Dramatic changes of these traits took place in the Neoproterozoic, in which 75% (12/16) of the topoichnotaxa and all nine basic topological configurations of metazoan traces occurred, but the most complex and highest level topological configuration occurred in the Early Cambrian of the coelomate animal explosive evolution, showing that in the Neoproterozoic and Early Cambrian gestated not only the Ediacarian fauna and all the basic types of multi cellular animals known today, but also all the basic and the most complex metazoan traces through geological time.

关键词： metazoan trace topological configuration Proterozoic.

Geochemistry of Sedimentation and Diagenesis in Qixia Formation (Early Permian) of Badong, Hubei Province, china: Implications for T-R Cycle Interpretation

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Journal of Earth Science 1999年第2期18卷 56-62页

作者： Yan Jiaxin Zhao Laishi faculty of Earth Sciences, china university of geosciences, wuhan 43.074 Fang Nianqiao Department of Geology and Mineral resources, china university of geosciences, Beijing 100083

Combined with sedimentary observation and mineralogical research on a type of drusy celestite of early diagenesis in origin, this geochemical study on the Qixia Formation at the Shuibuya Section, Badong County, Hubei Province of south china evaluates the contribution of sedimentation and diagenesis to the mass fractions of CaO, Al 2O 3, MgO, SiO 2, Fe 2O 3, Na 2O, K 2O, Mn, Sr, P and Ba in the carbonates. The Sr, initially released from the stabilization of carbonate calcium mineral, precipitated with sulfate ion as celestite in early diagenetic environment, where sulfate reduction was the minimum. Then it redistributed in burial diagenetic environment, where celestite was replaced by calcite. The fractions of the MgO and SiO 2 in the carbonates were mainly modified by the early dolomitization and silicification respectively. That of the Na 2O was overprinted by the burial diagenesis. Multivariate statistical analysis on data of sixty bulk rocks indicates that the mass fractions of the Al 2O 3, K 2O, Fe 2O 3, Mn, CaO, P and Ba were affiliated with the sedimentary factor despite the obvious decrease of CaO during early dolomitization and silicification. Among them, the Al 2O 3 and K 2O mainly represent the detrital components. In addition, a dysaerobic sedimentary background was confirmed by trace element measurement and information derived from the formation of the celestite. This genetic discrimination facilitates the interpretation of the transgressive regressive (T R) cycle and specialities featured this unusual carbonate unit.

关键词： sedimentation diagenesis celestite geochemistry T R cycle.

Sand Dunes Fixation in Baiji District, Iraq

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Journal of china university of geosciences 2002年第1期13卷 67-72页

作者： Ayad Mohammed Fadhilfaculty of Earth resources , china university of geosciences , wuhan 43.074 faculty of Earth resources China University of Geosciences Wuhan 430074

This study was carried out at Sand Dunes Stabilization Researches Station in Baiji district (230 km north of Baghdad, Iraq) to evaluate the effects of local soil conditioners manufactured from oil derivatives and plant residuals on sand dunes fixation as the first step for sand dunes stabilization. The results indicate that the fuel oil has the first place in improving wind erosion parameters in the study area, such as increasing mean weight diameter, dry aggregates percentage, the needed time for complete disaggregation by dry sieving, and decreasing the disaggregation rates. Bitumen emulsion occupies the second place, while the plant residuals occupies the third place and has slight effects on the studied parameters. Effects of conditioners on natural vegetation cover are negative in oil derivatives treatments, while positive in plants residuals treatments.

关键词： sand dunes fixation soil conditioners wind erosion Iraq.

Late Mesozoic Intracontinental Rifting and Basin Formation in Eastern china

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Journal of Earth Science 1997年第1期16卷 40-44页

作者： Ren Jianye Li Sitianfaculty of Earth resources, china university of geosciences, wuhan 43.074Lin ChangsongDepartment of Energy resources, china university of geosciences, Beijing 100083

? The intensive extensional deformation in the eastern part of the chinese continent in Late Mesozoic time (J3-K1) caused the formation of largescale fault basin system in Northeastern china block, metamorphic core complexes in North china block and widespread volcanic eruption and granitic intrusive in eastern china. Generally, the deformation has been interpreted as subduction tectonics along the eastern continental margin. We suggest that the combination effect of the subduction and collision in Tethys domain and the subduction from Pacific side and the mantle upwelling beneath the lithosphere. This event controlled the Late Jurassic to Early Cretaceous tectonic history in eastern china.

关键词： rifting fault basin system Late Mesozoic.

Evolution Mechanism of Slip Zone Under Fluctuation of Ground Water Table of Landslide

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地学前缘 2009年第S1期16卷 55-56页

作者： Bo Chai~1,Kunlong Yin~2 1.School of Environmental Studies,china university of geosciences(wuhan),wuhan 43.074,china. 2.Engineering faculty,china university of geosciences(wuhan),wuhan 43.074,china

The fluctuation of ground water table of landslide caused by the changing of rain fall and reservoir water level leads the slip zone to possess the complicated deformation features of stepped and *** role of the groun... 详细信息

关键词： groundwater fluctuation slip zone landslide

Tectonic Evolution of Tertiary Basins in circum-Pacific Belt of china and Their Geodynamic Setting

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Journal of Earth Science 1997年第1期16卷 4-10页

作者： Li Sitian Yang Shigong Xie Xinongfaculty of Earth resources, china university of geosciences, wuhan 43.074

? Tertiary basins distributed mainly in two zones in the CircumPacific region of china, which includes a rift basin zone in continental area and a continental margin basin zone in offshore area of west Pacific Ocean. Extensional regime dominated the evolution processes of the basins, and in many cases the extensional process was accompanied by dextral strikeslip movement. Mantle upwelling or plumes have been found beneath the rift zone and the marginal sea basins by geophysical and volcanic petrology research. Based upon the regional studies, the basin formation, lithosphere thinning and mantle upwelling may be caused by the superimposed effect of three processes: (1) subduction of Pacific plate, (2) subduction of IndiaAustralia plate which is the main controlling factor for the opening of the South china Sea and (3) collision of India with Eurasia. 

关键词： rifting basin geodynamics mantle upwelling plume.

Desertification Risk Monitoring for NorthShaanxi Province, china, Using NormalizedDifference Vegetation Index (NDVI)

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Journal of china university of geosciences 2002年第1期13卷 58-66,94页

作者： Mushtak Talib Jabbarfaculty of Earth resources , china university of geosciences , wuhan 43.074 faculty of Earth resources China University of Geosciences Wuhan 430074

In this study, the remote sensing is applied to the examination of the relationship between desertification and normalized difference vegetation index (NDVI) in the context of northern Shaanxi Province. This relationship is also examined using spatial analysis methods. A strong negative correlation is found in the largest area desert, indicating that the relationship between desert and NDVI is not a simple linear one and that the correlation coefficient between NDVI and vegetation abundance is significant. The normalized difference vegetation index (NDVI) was compared with other vegetation index-based methodologies. NDVI is a valuable first-cut indicator for such systems, although the analysis and interpretation of its relationship to desertification are complex and also based on the detailed analysis of its relationship to ecological zone, vegetation type and season. Conclusions thus made would help to upgrade the methodology as an effective tool for early-warning desertification in the northern Shaanxi Province where a drought is a recurring threat. This methodology includes the integration of NDVI with other socio-economic and bio-physical indicators in CIS, the complementation of desert area data with satellite data, and the analysis of the relationship between NDVI and specific climatic zones, for each season and vegetation type.

关键词： desert desertification remote sensing NDVI china.