深井电阻率所处井孔位置与地震关系的研究   总被引：1，自引：0，他引：1       下载免费PDF全文

孙承德  顾贞庆  钟国芬 《地震工程学报》1996,18(4):74-76

对鲁南地区近几年发生的４级（ＭＬ）以上有感地震与深井电阻率所处井孔位置的关系进行了研究，进一步证明了“活断层—应力场效应”是存在的  相似文献   

新亚欧大陆桥的走向及相关问题探讨     

顾家Yu 《干旱区地理》1996,19(2):74-77

第二亚欧大陆桥已成为国际社会关注的焦点之一，但各国对其走向有着不同的见解和主张。本文概述了第二亚欧大陆桥各种走向的有关问题，并强调对其沿线环境灾害必须重视加以治理。  相似文献   

DISTRIBUTIONS AND HYDROLOGICAL CHARACTERISTICS OF TROPICAL CYCLONE RAINSTORMS AND FLOODS IN CHINA     

Wang Jiaqi  Shen Guochang  Geng Leihu  Gu Wenyan  Yao Huiming 《地理学报(英文版)》1996,(3)

I.horoductionPleNorthwestPacificOceanisti1elnostfrequentlyaffeCtedareaoftropicalcyclone(TC).AboLIt36percentTCoftheworldoccurinffosarea[2],andthenumberofTCWhichlandedonChinawiti1n1akimumwindforcescalesoverlOisabout35percentofti1atintheeastemcoastalcoLUitriesofAsia[l].BothrainstormsandfloodsMide,theidriuenceofTCareheaVyinChina,suchastherainfalldePthof2749mm/3datXinliao,Taiwanandpeakdischargeof44,6oOm'/satHuanggo(55,42okn'),YalujiangRjver.Therefore,TCisanimportantfaCtorforflooddisas…  相似文献   

多普勒天气雷达速度回波图的UHF信道传输     

赵恒轩  黄兴友 《南京气象学院学报》1992,15(2):134-140

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几种测震学指标的短临前兆异常的初步探讨          下载免费PDF全文

顾瑾平  杨彩霞  黄耘  李强 《地震工程学报》1992,14(3):21-26

本文在国家地震局组织的实用化攻关研究的基础上,按日常预报实践中积累的经验,分析研究了江苏及邻近地区几次地震前缺震曲线、波速比变化、b值时间扫描、累计无震单元数、尾波参数特征和地震活动性时间分维6个指标的短临异常信息,得到以下初步结论:(1)一些测震学指标在中强震发生之前三个月左右出现前兆变化;(2)短临前兆异常的幅度与震级大小的关系不明显;(3)在预测检验过程中,对于多数指标R约为0.5—0.6左右。  相似文献   

钻井岩心定向或岩石露头定向样品的古地磁数据处理程序     

顾心如 《吉林大学学报(地球科学版)》1992,(4)

本程序适用的范围很广,包括钻井岩心采样,岩石露头采样.坐标系则包括样品坐标,层面坐标与地理坐标.处理内容则包括逐步退磁结果数据表;退磁曲线;正交矢量图,赤平极射投影及其放大图.  相似文献   

Pyrite deformation in stratiform lead-zinc deposits of the Canadian Cordillera   总被引：10，自引：0，他引：10  

Gu Lianxing  K. R. McClay 《Mineralium Deposita》1992,27(3):169-181

Pyrite textures in five stratiform lead-zinc deposits from lower to upper greenschist facies environment of the Canadian Cordillera are described and discussed in terms of deposition/early diagenesis, deformation, metamorphism and hydrothermal alteration processes. Overgrowth is an important process during both diagenesis and deformation. Diagenetic and deformational overgrowths can be distinguished. Diffusive mass transfer, involving pressure solution and oriented overgrowth of pyrite is the main deformation mechanism in pyrite deposits at low metamorphic grades. Although diffusive mass transfer favours fine-grained mineral aggregates, its effect on coarse pyrite grains has also been identified. Ore minerals dissolved by pressure solution may be transported, with the assistance of pore fluids within fractures and grain boundaries, over distances significantly greater than the scale of individual grains to give a range of pressure solution/overgrowth textures. The textural modification of pyritic ores from the early stages of diagnesis, through metamorphism and deformation, to post deformation thermal annealing, has important implications for the distribution of trace elements and isotopic compositions in pyritic ores.  相似文献   

“94·7"北京大暴雨的能量转换          下载免费PDF全文

谷笳鸣 《气象》1995,21(10):36-38

用尺度分离的方法，对１９９４年７月华北一次暴雨过程中雨区内的能量制造和转换进行了计算，目的在于揭示暴雨前后不同的能量制造和转换特征。  相似文献   

Geology and Genesis of the Mafic—Ultramafic Complexes in the Huangshan—Jingerquan（HJ） Belt,East Xinjiang     

Gu Lianxing  Zhu Jianlin  Guo Jichun  Liao Jinjuan  Yan Zhenfu  Yang Hao  Wang Jinzhu 《中国地球化学学报》1995,14(2):97-116

More than twenty mafic-ultramafic complexes, which host several mediumor large-sized Cu−Ni deposits, occur along the Huangshan-Jingerquan (HJ) belt in East Xinjiang. Rock types in these complexes are predominated by peridotite, pyroxene peridotite, olivine pyroxenite, gabbronorite, orthopyroxene gabbro, troctolite, gabbro and diorite. The ultramafic rocks are relatively Fe-enriched and are characterized by an assemblage of olivine+orthopyroxene+clinopyroxene+hornblende±plagioclase without obvious metamorphic textures. Chemically, these complexes are relatively Fe-enriched and show a tholeiitic trend of evolution. The complexes in this belt are intruded under the extensional environment in a Mid-Carboniferous back-arc basin. They can be considered as a new type of mafic-ultramafic complexes in orogenic belts, as designated by the name of the East-Xinjiang-type complexes. This project was financially supported by the National Natural Science Foundation of China.  相似文献   

ION EXCHANGE-FLOW INJECTION SPECTROPHOTOMETRIC SIMULTANEOUS DETERMINATION OF TRACES OF BROMIDE AND IODIDE IN SOME CHINESE STANDARD SAMPLES     

Guojun LIU  Jinxin LI  Xiumei ZHAO 《Geostandards and Geoanalytical Research》1995,19(2):215-220

An ion exchange flow injection method is presented for the simultaneous determination of bromide and iodide based on the catalytic reaction during the oxidation of Pyrocatechol Violet by hydrogen peroxide in strongly acid solution. Bromide and iodide in sample solutions are concentrated when they flow through the ion exchange column; they are removed and separated with sodium nitrate eluant flowing through the column, and are monitored spectrophotometrically at 555 nm. All possible anionic interferences were studied. The procedure has been applied successfully to the determination of bromide and iodide in some Chinese standard reference samples. The limits of detection are 0.2 ppm and 0.4 ppm of bromide and iodide respectively in soils and stream sediments.  相似文献