检索结果-南通市图书馆

Evolution　of　Circum－Pacific　Basins　andVolcanic　Belts　in　East　china　and　Their　Geodynamic　Background

在线全文

学校读者我要写书评

暂无评论

Journal of earth Science 1995年第1期14卷 48-58页

作者： Li Sitian(faculty of earth Resources,{2. University of {3., Wuhan 430074)Mo Xuanxue(Department of Geology and Mineral Resources,{2. University of {3., Beijing 100083.)Yang Shigong(faculty of earth Resources,{2. University of Geosc

Based upon the recent research on the Circum- Pacific geology and sedimentary basins a review of the time - space evolution of Mesozoic and Cenozoic basic and their geodynamic background are outlined. The foreland-type basins originated mainly in Late Triassic during the convergence of East Tethys and the continental collision, while the extensional and transform-extensional basins formed mainly in the Eastern china in Late Mesozoic and Cenozoic. They are closely related to the subduction Process of Pacific Plate from eat and the collision from southwest. As a sighficat indicator of deep Process of the earth, the igneous rocks and magmatism offer very important information for the basin dynamic analysis. The evolution of the basins in East china were controlled by the combination and alternation effects from the surrounding Plates of Eurasia and the deep Process.

关键词： Cirum-Pacific basins magmatism geodynamics.

Integrated Assessment of Mineral Resources and Environmentin Mid-South of Shandong Province

在线全文

学校读者我要写书评

暂无评论

Journal of earth Science 2000年第2期19卷 76-78页

作者： Wei Min Yao Yonghui Wang Xueping faculty of earth Resources,{2. University {3., Wuhan 430074

On the bases of the field survey and a large number of testing data, we process the qualitative and quantitative assessment of the mine environment in the mid south of Shandong Province using the following grade Ⅰ factors:the surface subsidence in mining area, the three wastes of mine industries, the pollution sources, the surface water pollution, the underground water pollution and the air pollution. By means of emitting factor judgment and water quality indexes, we locate pollution sources, main pollutants, pollution type and pollution grade in the study area. Using the MAPGIS, we draw a zonality map of the mine environment. This paper attempts to offer a concrete example, including valuable assessment method, data and conclusion, for the assessment of mine environment from the integrated assessment of mineral resources and mine environment. This research is oriented towards the sustainable development and the ecological environment optimization.

关键词： integrated assessment of resources and environment the quality assessment of environment water quality index emitting factor judgment liquid waste capacity per 10 000 yuan production value ecological environment optimization.

Image Processing on Geological Data in Vector Format and Multi-Source Spatial Data Fusion

在线全文

学校读者我要写书评

暂无评论

Journal of china University of geosciences 2003年第3期14卷 278-282页

作者： Liu Xing Hu Guangdao Qiu Yubao faculty of earth Resources,{2. University of {3., Wuhan 430074 faculty of earth Resources China University of Geosciences Wuhan 430074

The geological data are constructed in vector format in geographical information system (GIS) while other data such as remote sensing images, geographical data and geochemical data are saved in raster ones. This paper converts the vector data into 8 bit images according to their importance to mineralization each by programming. We can communicate the geological meaning with the raster images by this method. The paper also fuses geographical data and geochemical data with the programmed strata data. The result shows that image fusion can express different intensities effectively and visualize the structure characters in 2.dimensions. Furthermore, it also can produce optimized information from multi-source data and express them more directly.

关键词： geological data GIS-based vector data conversion image processing multi-source data fusion

松辽盆地北部姚家组底界面特征及其动力学背景

在线全文

学校读者我要写书评

暂无评论

石油学报 2010年第2期31卷 187-195页

作者：宋鹰任建业阳怀忠佟殿君雷超中国地质大学构造与油气资源教育部重点实验室湖北武汉430074 中国地质大学资源学院湖北武汉430074 教育部含油气盆地构造研究中心中国地质大学分中心湖北武汉430074

以松辽盆地北部地震资料精细构造解释和钻井资料分析为基础,对其姚家组底界面特征展开了详细的研究。结果表明:在该界面之下的地层内发育了4组近NNE走向长距离延伸的微幅褶皱带,并且这4组褶皱带的隆起幅度由东向西逐渐减小;沿该界面发... 详细信息

以松辽盆地北部地震资料精细构造解释和钻井资料分析为基础,对其姚家组底界面特征展开了详细的研究。结果表明:在该界面之下的地层内发育了4组近NNE走向长距离延伸的微幅褶皱带,并且这4组褶皱带的隆起幅度由东向西逐渐减小;沿该界面发育了东薄西厚的红色古土壤层;古生物资料也显示界面上下有明显的物种组合突变现象。地球物理、沉积、古生物等证据揭示,姚家组底界面是发育在盆地裂后热沉降期内的一个具有挤压背景的区域性角度不整合面。磁性地层、古生物和同位素年龄均显示该界面的发育时代为晚白垩纪(距今约88.5Ma),与中生代期间欧亚板块与太平洋板块间一次重大的板块构造运动学重组事件一致。由此推断,松辽盆地北部姚家组底界面是晚白垩纪板块构造重组事件在松辽盆地内的响应界面,至此开始,松辽盆地进入了构造反转演化阶段。

关键词：松辽盆地姚家组底界面板内应力构造反转晚白垩纪板块构造

Granulite Genesis and Tectonic Evolution in Tongbai Area:Single Zircon Evaporation Ages and Nd Isotopic Geochemistry

在线全文

学校读者我要写书评

暂无评论

Journal of earth Science 1998年第3期17卷 31-36页

作者： Zhang Hongfei Gao Shan Zhang Li Zhong Zengqiu Ling Wenli Wang Linsen faculty of earth {2.,{3. University of geosciences, Wuhan 430074

According to the age measurements of single zircon evaporation method, combined with the study of Nd isotopic geochemistry in Tongbai area, the protolith age of basic granulites is about 1 010 Ma; the protolith age of intermediate acid granulites is probably more than 904 Ma, which is close to the age of the basic granulites. The basic granulites would be the nature occurrence of basic magma underplating beneath the base of lower crust in the North Qinling crustal vertical growth event at about 1 000 Ma. However, the intermediate acid granulites were the result of the mixing fusion between the lower crust material and the underplating basic magma, which shows a strong crust mantle interaction. The 470-480 Ma are the peak metamorphic ages of the basic and intermediate acid granulites, which related to the crust bi direction shortening and crust thickening due to the Erlangping back arc basin southward subduction and the paleo Qinling oceanic plate northward subduction.

关键词： granulite zircon evaporation geochronology Nd isotopic geochemistry lower crust genesis tectonic evolution Tongbai area.

Study of Sand Dunes and Their Effect on Desertification of Cultivated Lands in Shaanxi Province, china Using Remote Sensing Techniques

在线全文

学校读者我要写书评

暂无评论

Journal of china University of geosciences 2002年第3期13卷 234-239页

作者： Mushtak Talib Jabbar Hu Guangdao Chen Jianguo faculty of earth Resources,{2. University of {3., Wuhan 430074 faculty of earth Resources China University of Geosciences Wuhan 430074

About half of the arid and semi-arid lands in the world are deserts thatcomprise various types of aeolian sand dunes deposits. In Shaanxi Province, aeolian sand dunes coverconsiderable areas of the Yulin desert and northern Jinbian. Sand dunes are moving in the main winddirection and converting some agricultural area to wasteland. Remote sensing of sand dunes helps inthe understanding of aeolian process and desertification. Remote sensing data combined with fieldstudies are valuable in studying sand dunes, regional aeolian depositional history. In particular,active and inactive sand dunes of the north Shaanxi Province were studied using remote sensing andgeographic information system. In this study, we describe the Landsat thematic mapper (TM) images,covering north Shaanxi Province, which were used to study the distribution, shape, size, trends,density and movement of sand dunes and their effect on desertification of cultivated *** was made depending on soil erodibility factor (Ⅰ) and local climatic factor (C) duringthe period (June to September). The result indicates that soil erosion caused sand drift of 8.957 5,7. 03.ton for Yulin and Jinbian, respectively. The mean sand dunes movement rate were 4.3., 3.11 m,whereas, monthly sand dune advance rate were 1. 092.5, 0. 777 5m, for the two locations,respectively. The study reveals that cultivated lands extended obliquely to the direction of sanddune movement are extremely affected, while other segments that extend parallel to the direction ofthe movement are not affected. Accordingly the north Shaanxi Province was divided into areas ofdifferent classes of potential risk. Moreover, blown sands and sand movement from neighboringhighlands also affect the area of western desert.

关键词： sand dunes desertification remote sensing crust index china

Paleomagnetic Polarity Research of Paleobiology Boundary(Bed2.) of Meishan,Changxing,Zhejiang Province

在线全文

学校读者我要写书评

暂无评论

Journal of earth Science 1998年第3期17卷 62-63页

作者： Zhu Yanming faculty of earth {2.,{3. University of geosciences, Wuhan 430074 Morinaga Hayao Department of Geology, faculty of {2., Himeji Institute of Technology, Himeji 672.2., Japan

The magnetostratigraphic sampling was carried out respectively in the inside part (14 cm away from the section surface along the bed) and outside part (5 cm away from the section surface along the bed) with no interval at the same bed (Bed 2.) which the paleobiology boundary (PBB) of A and D sections lies in of Meishan, Changxing. This research shows that the deep samples suffered slighter secondary magnetization than the shallow ones did and in comparison with D section ’s samples, the samples of A section sustained slighter secondary magnetization. On the bases of the data, the secondary magnetization influence of which is relatively weak, this paper obtains the conclusion that the bed, in which the paleobiology boundary lies, lies within the reverse polarity subzone.

关键词： magnetostratigraphy secondary magnetization paleobiology boundary Meishan Changxing Zhejiang Province.

Electrical Calibration for Calvet Type Microcalorimetry

在线全文

学校读者我要写书评

暂无评论

Journal of china University of geosciences 2001年第3期12卷 232-235页

作者： Chen Jiawei Bao Zhengyu Mei Yupingfaculty of earth {2.,{3. University of geosciences, Wuhan 430074 faculty of earth {2. China University of Geosciences Wuhan 430074

The device construction and working principle of Calvet type heat conductive microcalorimetry are generally introduced in this paper. Based on previous work, we design a reactor vessel and its electrical calibration equipment according to our special study systems. The heat constant of our improved microalorimetry is gotten by means of electrical calibration on the basis of Tian's equation. The results gotten by integration method are identical with ones gotten by peak method. It shows that our improved device works well enough to develop further studies.

关键词： electrical calibration microcalorimetry integration method peak method heat constant.

Tectono-Stratigraphic Analysis and Geodynamic Background of Mesozoic Songliao Basin

在线全文

学校读者我要写书评

暂无评论

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

作者：  Xie Xinong Jiao Yangquan faculty of earth Resources,{2. University of {3., Wuhan 430074

? 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.