基于可靠度理论的黄土高边坡优化设计

对黄土高边坡进行可靠性分析，应用数学原理和优化原理，建立了黄土高边坡的优化模型，对铜黄一级公路黄土高边坡进行分析验证。结果表明，该方法计算的结果与实际较接近．应用中易操作。     

Isotopes and Geochronology of the Meixian-type Pb-Zn-(Ag)Deposits,Central Fujian Rift,South China:Implications for Geological Events

Central Fujian Rift is another new and important volcanogenic massive sulfide Pb-Zn polymetallic metallogenetic belt. In order to find out the material genesis and mineralization period of Meixian-type Pb-Zn-Ag deposits, S and Pb isotope analysis and isotope geochronology of ores and wall rocks for five major deposits are discussed. It is concluded that the composition of sulfur isotope from sulfide ore vary slightly in different deposits and the mean value is close to zero with the 834S ranging from -3.5‰ to ＋5.6‰ averaging at ＋2.0‰, which indicates that the sulfur might originate from magma or possibly erupted directly from volcano or was leached from ore-hosted volcanic rock. The lead from ores in most deposits displays radioactive genesis character （206pb/204pb〉18.140, 207Pb/204pb〉15.584, 208pb/204pb〉38.569） and lead isotope values of ores are higher than those of wall rocks, which indicates that the lead was likely leached from the ore-hosted volcanic rocks. Based on isotope data, two significant Pb-Zn metallogenesis are delineated, which are Mid- and Late-Proterozoic sedimentary exhalative metailogenesis （The single zircon U-Pb, Sm-Nd isochronal and Ar-Ar dating ages of ore- hosted wall rocks are calculated to be among 933-1788 Ma.） and Yanshanian magmatic hydrothermal superimposed and alternated metallogenesis （intrusive SHRIMP zircon U-Pb and Rb-Sr isochronal ages between 127-154 Ma）.     

科技进步与金属矿产资源供应——兼论我国可持续发展的资源基础

科技进步为金属矿产资源的勘查开发、获取供应提供理论指导和技术支持,并在很大程度上决定着地矿产业的可持续发展。在21世纪绿色矿业的崛起和新的循环经济模式下矿业文明的振兴更是离不开现代科学技术,二者相辅相成,这对巩固我国可持续发展的资源基础意义重大。对于我国的资源开发供应,资源保障是前提基础,科学技术是方法手段,环境效益是发展目标,三者应协同推进,不可偏废。     

多媒体创作工具Compel的应用

本文介绍了一种多媒体应用的创作工具。利用这种工具可以编辑和组织文字、图象、图表、声音以及视频等多种媒体元素。并通过媒体链接以及超级链接，完成多媒体应用的制作。同时，也介绍了多媒体应用的播放。     

砂土液化判别方法可靠性评价

在进行液化评价简化法与规范液化判别方法对比基础上，利用液化概率的对数回归方程，讨论了规范液化判别方法的可靠性。研究结果表明，我国规范液化判别方法其液化概率变动较大，对于烈度 Ⅶ 度，规范法的液化概率在0.17～0.42间，小于简化法概率0.36～0.43，偏保守。对于烈度 Ⅷ 度和 Ⅸ 度近地表场地，规范法的液化概率高达0.65～0.70，远远高于简化法的液化概率，安全裕度不够。对于含粘粒土质液化评价，规范方法的液化概率总体上都较简化法高，特别是烈度Ⅷ度高粘粒含量其液化概率为0.9。     

A detailed receiver function image of the sedimentary structure in the Bohai Bay Basin

If the site at which receiver functions are constructed is filled by sediments, then the waveforms from these receiver functions are dominantly controlled by the sedimentary structures within the first few seconds after the direct P arrival. Based on this observation, waveform data collected at 44 temporary seismic stations have been used to image the sedimentary structure of the Bohai Bay Basin, a major continental petroliferous basin in Eastern China. An adapted hybrid global waveform inversion method was applied to the receiver functions to extract structural information beneath each of the stations. The derived S-velocity structure provides for the first time, a basin-scale seismic image of detailed sedimentary stratification. The sedimentary cover of the basin is about 2-12 km thick, consisting of Cenozoic, Mesozoic, and Paleozoic strata from top to bottom. The structural features presented in the S-velocity image coincide quite well with the depression-uplift type of tectonic system in the Bohai Bay Basin. The reconstructed morphology of the sedimentary layers provides seismological evidence for the two-stage evolution of the intracontinental basin that were caused by an intensive tectonic regime transition in late Mesozoic immediately following the lithospheric reforming of the Eastern China continent.     

内蒙古火龙沟铅锌矿床成矿岩体年代学、地球化学及其地质意义

内蒙古火龙沟铅锌矿床是近期勘查发现、预期可达中型规模以上的铅锌矿床之一,笔者对该矿区的侵入岩——正长花岗岩进行了LA-MC-ICP-MS锆石U_Pb定年和主量、微量元素分析,锆石U_Pb定年结果为(224.0±2.5)Ma,表明,该岩体侵位于晚三叠世。岩石地球化学研究结果显示火龙沟正长花岗岩体具有明显富Si O2和ALK、贫Mg O和TFe的特点,A/NK-A/CNK图解显示正长花岗岩属于准铝质花岗岩。微量元素蛛网图显示富集大离子亲石元素Rb、Th、U、K,亏损高场强元素Nb、Ta、Ti。稀土元素配分模式表现出富集LREE,亏损HREE的右倾型,LREE/HREE=8.04~10.40,具有明显Eu的负异常。花岗岩锆饱和温度计算结果表明该花岗岩岩浆形成温度为820℃,属于高温花岗岩,以上地球化学特征和高温的特点表明该花岗岩为A型花岗岩。结合区域构造演化历史,笔者认为该花岗岩体形成于古亚洲洋闭合后的造山后垮塌岩石圈伸展构造环境。     

内蒙古阿勒特高勒金多金属矿地质特征及找矿前景

内蒙古乌拉特后旗阿勒特高勒金多金属矿位于内蒙古中部狼山—白云鄂博铜、铅、金、锌、铁、铂、镍多金属成矿带西段,该矿是在完成1∶5万区域矿产远景调查中通过化探异常查证发现的,金矿赋存于中元古界渣尔泰山群阿古鲁沟组,主要为一套浅变质碎屑岩建造,受NEE断裂构造控制,该金矿主要矿体赋存于地表长约1 km,宽约3~50m的褐铁矿化蚀变带中,蚀变带内石英脉发育。勘查区内圈定金矿体4条,深部钻探验证表明,矿体延深稳定。本文分析了阿勒特高勒金等多金属矿的矿床特征、控矿因素,总结了找矿标志,指出该区成矿潜力较大。     

西藏改则县多龙矿集区发现岩墙岭蛇绿岩残片

西藏班公湖-怒江缝合带北缘多龙矿集区是青藏高原新近发现的具有超大型远景的、典型的富金斑岩型铜矿集区,其成岩成矿地质背景是解决班公湖-怒江洋构造演化的关键问题之一。近年来的区域地质调查研究发现,多龙矿集区南侧出露岩墙岭蛇绿岩残片,应该是班公湖-怒江蛇绿岩带的重要组成部分。岩墙岭蛇绿岩主要由席状岩墙群、枕状玄武岩和硅质岩组成,整体呈棱形或透镜体状断续分布于侏罗系复理石沉积内,构成典型的网结状构造。糜棱岩普遍发育在岩墙岭蛇绿岩和围岩的接触部位。综合前人研究成果,初步认为多龙矿集区早白垩世成岩成矿作用应该形成于增生楔之上伸展拉张的构造环境。岩墙岭蛇绿岩的发现和确定进一步约束了多龙矿集区成岩成矿地质背景,同时为班公湖-怒江缝合带的延伸及其构造演化的研究提供了新的线索。     

崩塌堆积体启动坡面泥石流判别与防治 ——以北川县开坪乡平石板泥石流为例

强震区地震后大量的崩塌堆积体堆积于高陡斜坡中上部,堆积体远离居民点,一旦诱发为坡面泥石流,形成新的次生地质灾害,将严重威胁下方居民的生命财产安全。本文以北川县开坪乡平石板坡面泥石流为例,平石板沟“5.12”地震崩塌堆积体在2010、2013年强降雨作用下失稳转变为坡面泥石流淤积场镇。在平石板泥石流暴发特征介绍基础上,通过粒径不均匀系数、堆积体启动判别指标、后缘汇水面积等来分析崩塌堆积体启动条件及影响因素,并针对此类灾害发育特征,提出了通过上游稳拦固源方法进行治理的防治思路。以期为研究高陡斜坡堆积体的启动机制及防治提供一定的借鉴意义。