油气化探酸解烃标准样品研制     

卢丽  李武  李吉鹏  吴传芝  朱怀平 《物探与化探》2010,34(2)

介绍了油气化探酸解烃标准样品的研制过程,研究了酸解烃标准样品的制备,通过对酸解烃标准样品的均匀性检验、稳定性检验,保证了所研制的酸解烃标准样品是符合标准样要求的。通过对酸解烃标准样品的多次分析数据的统计处理,确定了该标准样品的值和不确定度。另外,通过对酸解烃标准样品的保存试验研究,确定了该样品的包装和有效期。  相似文献   

Stevns Klint Fish Clay (FC-1): Preparation of, and Preliminary Results for, a Candidate Reference Material     

Rajmund Gwozdz  Hans J. Hansen  Kaare L. Rasmussen 《Geostandards and Geoanalytical Research》2001,25(1):159-166

The collapse of a section of the cliff at Stevns Klint, Denmark in 1986 provided a unique opportunity to collect about 50 kg of Fish Clay representing the Cretaceous-Tertiary (K-T) boundary layer. In this paper, details of the preparation of this sample are presented, together with preliminary analytical results to support the development of this sample as a reference material, particularly for the determination of iridium and the other platinum-group elements in clays and sediments associated with K-T boundary studies and in other environmental samples collected to study the effects of automobile exhaust catalysts.  相似文献   

大同－阳高地震的孕育和强震的“增震作用”     

陈绍绪  李文英 《山西地震》1995,(1)

论述了大同－阳高地震的孕育机制，认为可能有３个因素，即区域断层的长期蠕动，中小地震的频繁活动以及外围强震的“增震作用”。研究了利用强震的增、减震作用判定强震危险区的方法，初步取得了较为满意的效果。  相似文献   

云母珠光颜料研制方法介绍   总被引：9，自引：0，他引：9  

梁明仁  王廷吉 《华东地质学院学报》1995,18(1):64-69

本文综述云母珠光颜料的特性、国内外发展状况、制备方法及应用领域，详细介绍了云母珠光颜料的光学原理和影响珠光光泽的各种因素，并讨论了改进产品颜色鲜艳性、分散性、耐光耐候性及增强光泽性的各种方法。  相似文献   

孕震过程中波速比及S波分裂时空变化的数值模拟     

张永仙  石耀霖 《地震》1994,(6):26-33

本文利用有限元方法模拟计算了强震发生前孕震区的波速比及Ｓ波分裂的时空变化，结果表明，孕震过程中，随着应力的局部集中，岩体发生扩容，引起裂隙的增生及定向排列，从而使孕震区产生各向异性，引起波速比的变化及Ｓ波分裂现象，在不同阶段，穿过同一路径的地震射线其波速比和Ｓ波分裂特征不同；在同一时刻，沿不同路径传播的地震射线其波速比及Ｓ波分裂也不同。总体看来，平行于孕震断层传播的地震波速比变化比垂直于其波速比及  相似文献   

邢台强震的深部三维构造背景和孕震条件   总被引：7，自引：1，他引：7       下载免费PDF全文

张家茹  祁学钟 《地震地质》1994,16(4):319-328

在邢台地震区开展了地震转换波测深工作，得出了６条深部构造剖面图，其中包括３条ＮＷ向和３条ＮＥ向剖面，同时也得出了地壳内Ｇ、Ｃ和Ｍ３个主要深部界面的埋深分布图以及地壳内波速分布模型。在此基础上讨论了邢台强震发生的深部三维构造背景和深部孕震条件  相似文献   

Planning for El Niño: The Stages of Natural Hazard Mitigation and Preparation*     

Nancy Beller‐Simms 《The Professional geographer》2004,56(2):213-222

This study examines mitigation and preparation activities selected by four county and state governments in anticipation of the 1997–1998 El Niño. It expands the knowledge of how state and local governments plan short‐term projects and mitigate with longer‐term activities in anticipation of a natural hazard. It also provides a preliminary understanding of divergent responses and plans under similar disaster warnings. It outlines stages that governments follow in determining their natural hazard mitigation and preparedness activities. This model should provide hazard planners, particularly those planning for slower onset hazards, with insights into their own local circumstances, allowing them to choose appropriate strategies.  相似文献   

鄂尔多斯北缘断陷盆地区强震孕育的卫星遥感影像研究   总被引：2，自引：0，他引：2       下载免费PDF全文

李建华 《地震地质》2005,27(3):374-381

利用多时相、多波段卫星图像,研究1979年五原6.0级地震、1989年大同-阳高6.1级地震和1996年包头西6.4级地震震区的构造活动信息,结合前人的烈度调查资料,探讨这些强震发生的地质构造环境。研究表明:1979年五原6.0级地震发生在NE向海子堰断裂与NW向五原西断裂交会的部位。五原6.0级地震高烈度区等震线长轴呈NE向,与海子堰断裂一致,是五原地震的发震构造。1996年包头西6.4级地震发生在由陡崖和沟槽地貌显示的NEE向乌拉山北缘断裂与NW向新生砂石厂断裂交会的部位。包头西6.4级地震高烈度区等震线长轴呈NE向,与乌拉山北缘断裂接近,该断裂是包头西6.4级地震的发震构造。2次地震高烈度区长轴与低烈度区长轴走向相差近90°,这是因为除发震构造外,烈度区还受一组与之交会的共轭断裂活动的影响。1989年大同-阳高6.1级地震,发生在从六棱山腹地向大同-阳高盆地延伸的NNE向大王村-西要泉断裂上,该断裂是大同-阳高地震的发震构造  相似文献   

The December 26, 2004, off the west coast of northern Sumatra, Indonesia, M _W=9.0, earthquake and the critical-point-like model of earthquake preparation     

Jiang Chang-sheng  Wu Zhong-liang 《地震学报(英文版)》2005,18(3):290-296

Long-term seismic activity prior to the December 26, 2004, off the west coast of northern Sumatra, Indonesia, M _W=9.0 earthquake was investigated using the Harvard CMT catalogue. It is observed that before this great earthquake, there exists an accelerating moment release (AMR) process with the temporal scale of a quarter century and the spatial scale of 1 500 km. Within this spatial range, the M _W=9.0 event falls into the piece-wise power-law-like frequency-magnitude distribution. Therefore, in the perspective of the critical-point-like model of earthquake preparation, the failure to forecast/predict the approaching and/or the size of this earthquake is not due to the physically intrinsic unpredictability of earthquakes. Foundation item: Ministry of Science and Technology Project (2004CB418406). Contribution No. 05FE3010, Institute of Geophysics, China Earthquake Administration.  相似文献   

Factors influencing determination of shale classification indices and their correlation to mechanical properties     

Hisham T. Eid 《Geotechnical and Geological Engineering》2006,24(6):1695-1713

The influence of sample preparation procedure on the measured classification indices such as clay-size fraction, liquid limit, and plastic limit of shales was investigated. Shale samples covering a wide range of composition and plasticity were tested using standard and modified preparation procedures to yield quantitative data required for this investigation. The study specifies the range of shale plasticity in which the measured values of clay-size fraction and liquid limit are sensitive to hydrometer specimen size and rehydration time, respectively. The study also revealed that the degree of shale particle disaggregation has an important influence on the measured clay-size fraction and liquid limit. This influence is maximized for shales with intermediate plasticity and can be interpreted in terms of particle size and shape. Correlations were established between classification indices derived from standard and modified sample preparation procedures. It is recommended to use these correlations to adjust shale classification indices derived from standard sample preparation procedures usually utilized by commercial laboratories. Such correlations help in creating a universally followed procedure for better estimation of shale engineering properties and reliable interpretation of case histories involving shale formations.  相似文献