ISO/TCl29/SC2铝土矿(化学分析)国际标准会议     

列宁格勒ISO  TC  SC国际标准会议中国小组 《矿产与地质》1989,(2)

国际标准化组织ISO TC129 SC2铝土矿化学分析技术委员会第六次会议于1987年9月7至11日在苏联列宁格勒举行。参加会议的有澳大利亚、中国、法国、匈牙利、捷克、美国和苏联等七个国家以及中央秘书处代表Guadillere先生共21人。我国由中国有色金属工业总公司派出三人代表组首次出席该分委员会的会议。  相似文献   

昌马断裂带的水平断错与强震重复率估计   总被引：1，自引：0，他引：1  

候康明  王华林 《中国地震》1990,6(3):70-78

通过对1932年昌马地震(7.6级)震中区(昌马盆地—西水峡断陷谷地内)的大比例尺活断层填图(1:5万),获得了沿地震断层带分布的时代、规模不同的山脊及冲沟的水平断错数据。分析结果表明:水平断错量具明显的分级特点,全新世以来,最大一级水平位错量平均为39米,平均年滑动速率为4.1毫米/年。 依据古陡坎侵蚀斜面的主坡角与其年龄的相关统计公式,求得最近一次历史未记载的强地震事件发生在距今约1968年,它与1932年昌马地震的间隔时间为1911年,由这些资料粗略的求得昌马断裂的蠕滑速率为1.37毫米/年,占整个走滑量的31.8％。本文由上述资料求得昌马断裂带的强震(M≈7.6)重复周期约为2051年。  相似文献   

与碱性火成岩共生的贵金属矿床     

Moon  TC 吴素珍 《国外前寒武纪地质》1991,(1):73-74

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平原地区活断层研究   总被引：3，自引：0，他引：3  

王华林  李家灵 《地震研究》1991,14(2):132-140

本文归纳、总结了近几年来山东省地震局在工程地震工作中采用的平原地区活断层研究的方法。几个典型实例证明,这一方法在平原地区活断层研究中是行之有效的,获得了良好的、具有科学价值的结果,同时讨论了与这一方法有关的几个问题。  相似文献   

1995年9月20日苍山5.2级地震概述   总被引：1，自引：0，他引：1  

刁守中  王华林 《国际地震动态》1996,(4):17-21

１９９５年９月２０日山东苍山县发生了５．２级地震。本文对这次地震的地震参数、地震序称为类型及震后早期趋势预测、地震宏观烈度、震灾评估、震前预测、主要异常现象及其特征，社会反应以及经验和启示等作了概括的报道。  相似文献   

Coral reef health and effects of socio-economic factors in Fiji and Cook Islands     

Hoffmann TC 《Marine pollution bulletin》2002,44(11):1281-1293

This research focuses on coral reef health in the South Pacific region, an area of high global coral diversity. Coral reef health surrounding four island case studies in the Cook Islands and Fiji have been assessed in areas that have not been previously surveyed. This study compares four islands with barrier and fringing reefs that have different levels of economic development, population pressure, land-use practices, and marine management practices. This interdisciplinary research methodology includes both ecological and social data collection to further understanding of human environment interactions. In comparing the reefs with different socio-economic factors, this research shows that reefs with traditional systems of resources management are healthier, population pressure is not the main factor causing the demise of the reefs and agro-industry is the main industry causing the degradation of the reef in these four South Pacific Islands. In addition, researchers need to use a whole reef perspective to examine coral reef health.  相似文献   

地震-电成像联合探测试验——以淄博市活断层探测为例   总被引：4，自引：0，他引：4  

朱涛  何正勤  冯锐  郝锦绮  周建国  王华林  王硕卿 《地震地质》2007,29(2):373-380

在城市浅部活断层探测中,地震和电成像是2种主要的地球物理勘探手段。它们既可独立开展工作,也可在地质构造复杂地段进行联合探测,以更合理地解释探测区域的地质构造。文中利用电阻率和地震纵波速度之间的简单关系,进行了地震-电成像联合反演的初步探索。结果表明,通过参考电成像图像的电阻率分布,可获得合理的准二维地震波叠加速度模型,最终获得探测区域合理的地震时/深剖面,深化对地质构造的认识和提供合理的解释  相似文献   

Analysis of karst aquifer spring flows with a gray system decomposition model   总被引：1，自引：0，他引：1  

Hao Y  Yeh TC  Wang Y  Zhao Y 《Ground water》2007,45(1):46-52

There are approximately 470,000 km(2) of karst aquifers that feed many large springs in North China. Turbulent flow often exists in these karst aquifers, which means that the classical ground water model based on Darcy's law cannot be applied here. Ground water data are rare for these aquifers. As a consequence, it is difficult to quantitatively investigate ground water flow in these karst systems. The purpose of this study is to develop a parsimonious model that predicts karst spring discharge using gray system theory. In this theory, a white color denotes a system that is completely characterized and a black color represents a system that is totally unknown. A gray system thus describes a complex system whose characteristics are only partially known or known with uncertainty. Using this theory, we investigated the karst spring discharge time series over different time scales. First, we identified three specific components of spring discharge: the long-term trend, periodic variation, and random fluctuation. We then used the gray system model to simulate the long-term trend and obtain periodic variation and random fluctuation components. Subsequently, we developed a predictive model for karst spring discharge. Application of the model to Liulin Springs, a representative example of karst springs in northern China, shows that the model performs well. The predicted results suggest that the Liulin Springs discharge will likely decrease over time, with small fluctuations.  相似文献   

Two-stage aquifer pumping subject to slow desorption and persistent sources     

Saez JA  Harmon TC 《Ground water》2006,44(2):244-255

This work focuses on improving pump-and-treat remediation by optimizing a two-stage operational scheme to reduce volumes extracted when confronted with nonequilibrium desorption, low-permeability units, and continuous contaminant sources such as non-aqueous phase liquids (NAPL). Q1 and Q2 are the initial short-term high pumping rate and later long-term low pumping rate, respectively. A two-dimensional ground water flow and transport management model was used to test the proposed strategy for plumes developed from finite (NAPL-free) and continuous (NAPL-driven) contaminant sources in homogeneous and nonhomogeneous (zoned) aquifers. Remediation scenarios were simulated over durations of 2000, 6000, and 15,000 d to determine (1) the optimal time to switch from a preset Q1 to Q2 and (2) the value of Q2. The problem was constrained by mass removal requirements, maximum allowable downgradient concentrations, and practical bounds on Q2. Q1 was fixed at preset values 50% to 200% higher than the single-stage pumping rates (i.e., steady pumping rates during entire remediation period) necessary to achieve a desired cleanup level and capture the plume. Results for the NAPL-free homogeneous case under nonequilibrium desorption conditions achieved the same level of cleanup as single-stage pumping, while reducing extracted volumes by up to 36%. Comparable savings were obtained with NAPL-driven sources only when the source concentration was reduced by at least 2 orders of magnitude. For the zoned aquifer, the proposed strategy provided volume savings of up to 24% under NAPL-free and reduced source conditions.  相似文献   

沂沭断裂带构造区光弹实验与地震危险区判定研究     

黄兴  胡宏玖  王华林  黄大卫  王纪强  陈平  胡超  刘军  刘红欣 《中国地震》2015,31(3):529-543

在对沂沭断裂带的地质构造环境、断裂带分布特征进行详细分析的基础上,采用聚碳酸酯材料制成沂沭断裂带构造区域的地质模型,分别运用集中、2点和均布等加载方式,使用光弹实验方法模拟特定构造框架下应力、应变场的变化特征。通过对光弹实验数据的分析,在对比不同加载方式下应力积累区域和地震危险区的基础上判定沂沭断裂带构造区中的地震危险区域。  相似文献