顶山地区乌伦古河组铀成矿水文地质条件分析

本从区域水地质及构造特征出发，分析了顶山地区乌伦古河组铀成矿水地质条件总结了该地区铀成矿模式，并对该地区铀成矿前景做出预测。     

新驿煤矿下组煤矿井涌水量预测研究

在系统收集水文地质资料的基础上,运用"大井法"和水文地质比拟法对开采16煤的涌水量进行了预测,利用突水系数法,对八采区16煤底板奥灰突水危险性进行了评价,得出了突水系数分区图。经综合分析对比,采用大井法的预测结果:即开采16煤正常涌水量为482m3/h,最大涌水量为540m3/h;奥灰突水量初期为1 083～10 640m3/h,一般为660～4470m3/h;如对奥灰采取疏排降压方案,疏降排水量预计为770m3/h。此结果可作为矿井回采阶段防治水设计的参考。     

粘性土微观结构简易定量分析法

作者根据计算机图像处理的基本原则，探索出一套粘性土微观结构简易定量分析法，经检验，这种方法简易，有效，对推广岩土结构定量化具有重要意义。     

上海地区超高层建筑桩基沉降计算方法探讨

本文根据已有的建筑经验,应用明特林应力分布理论及双层地基概念和土的临界应力的分析,提出了更符合实际的沉降计算方法,并论证了在第三类土层排列区(即埋深30～40mm的⑦层粉砂层)超高层桩基设置的可能性,以大大减少工程造价。     

Intrusion and its implication for subsidence: A case from the Baiyun Sag, on the northern margin of the South China Sea

We develop a series of simple numerical models to explain the anomalous subsidence and deposition phenomena on the northern continental margin of the South China Sea, in particular in the Baiyun Sag. The results suggest that a short-period high rate deposition of around 17 Ma is related to a rapid subsidence event, which may be due to episodic emplacement of a dense intrusion. Necking and gravity models indicate that in the basement of the Baiyun Sag, there is a dense zone that is 100–200 kg/m³ more dense than the surrounding country rock. Considering its high magnetic intensity and regional igneous activity, the dense zone is thought to be related to a phase of basalt intrusion that may have taken place around 17 Ma. Thermal and subsidence models indicate that a hot denser intrusion can cause significant subsidence immediately after the intrusion. The subsidence rate then slows down with cooling, thus becoming consistent with the observed subsidence curves at around 17 Ma. The results also indicate that the lithospheric strength under the Baiyun Sag is negligible, and that the high-velocity layer in the lowermost crust may be not an original part of the pre-rift crust. Instead, it is thought to be underplated intrusion emplaced at around 30 Ma when the continental margin broke up.     

论油气成藏与金属成矿的关系及综合勘探

从油气藏及金属矿藏的来源、运移、成藏/成矿等方面对油气成藏和金属成矿之间的关系进行了论述,指出油气藏和沉积金属矿藏均来自于相同的烃源岩/矿源层。一些金属(铀、黄铁矿等)的存在,有可能对有机质向烃类的转化起到了积极的催化作用,而烃类中的有机酸对金属元素具有溶解、螯合作用,有利于金属元素随烃类和成矿流体的析出。烃类和成矿流体在水-油-岩共存体系,在近乎相同的运移机制和路径中,能够一起溶解、萃取其路径上的金属元素,有利于金属元素的运移。油气与成矿流体可以在圈闭中聚集、成藏或者由于物理化学条件的变化,金属矿物独立沉淀成矿。油气与金属的成藏/成矿在时间和空间上也具有某些相似性。因此油气成藏和金属成矿具有非常密切的关系,有利于对二者进行综合勘探和利用,具有非常重要的现实意义。     

中亚巴尔喀什成矿带晚古生代岩浆活动与斑岩铜矿成矿时代

巴尔喀什成矿带是中亚成矿域重要的晚古生代斑岩铜钼成矿带。通过该成矿带科翁腊德、博尔雷和阿克斗卡地区与斑岩铜成矿作用密切相关的花岗斑岩类岩体锆石SHRIMP U-Pb定年,主量、稀土和微量元素地球化学,Sr、Nd同位素示踪分析,进一步厘定了斑岩铜成矿作用的时代,并推测了板块构造环境。斑岩铜成矿时代分为两期：早期约为327 Ma,形成科翁腊德和阿克斗卡超大型斑岩铜矿床;晚期约为316 Ma,形成博尔雷大型斑岩铜矿床。与成矿有关的斑岩类主要为高钾钙碱性系列花岗岩,可能为火山岛弧环境,部分具有埃达克岩特征和经典岛弧花岗岩类特征。斑岩类ε_Sr(t)和ε_Nd(t)的变化范围分别为-6.35~34.03和-0.46~5.53。其中,科翁腊德-博尔雷地区斑岩类来源于亏损地幔与大陆地壳表层物质（老地壳物质）的显著混染作用,而阿克斗卡地区斑岩类直接来自于亏损地幔。将巴尔喀什成矿带与我国西准噶尔成矿带进行了对比,认为可能属于同一个晚古生代斑岩铜钼成矿带。     

Investigations and assessment of the landslide hazards of Fengdu county in the reservoir region of the Three Gorges project on the Yangtze River

The spatial database of landslides in Fengdu County of the reservoir region of the Three Gorges project (TGP) on the Yangtze River was compiled from a variety of different sources including field investigations on landslides, existing catalogues and archives on landslides, reports of meteorological events and human engineering activities that triggered slope failures. The major factors that are found to have affected the slope stabilities are outlined, and an assessment and zonation of landslide hazards of the region is made using an integrated information model, which is divided into destructive, disastrous, likely disastrous and essentially non-disastrous areas from the assessment of landslide hazards. The destructive and disastrous areas are respectively 1.9 and 13.8% of the total region, mostly being nearby townships, highways along the south bank of the Yangtze River and residential quarters along two flanks of the Yangtze River and its distributaries, that will impose direct impact to highway transportation and residential lives, and may effect to some degree the navigation of the Yangtze River, reservoir banks, and building of cities and towns.     

北太行山—燕山区中生代金属矿床成矿系统

太行山北段—燕山地区位于中朝板块中部及其北部边缘,以铁、铜、钼、金、银、铅、锌、铀等金属矿产为特色。中生代本区进入陆内造山作用阶段,花岗质岩浆作用及与之有关的成矿作用是克拉通活化的结果。在已研究了与花岗质岩浆作用有关的成矿系列划分、特征和控制因素等基础上,本文重点探讨了成矿系统的划分、时空结构及其控制因素,指出其作为中生代陆内造山作用的结果,明显受到两期不同成矿动力机制的控制,主要由古欧亚构造域成矿系统和西太平洋构造域成矿系统组成。根据构造应力环境,可进一步划分出５个成矿亚系统和Ⅰ～Ⅳ４个成矿系列。成矿系列或矿床具有多期性,不同时代矿床空间分布成带或集中区,三叠纪矿床主要分布于燕辽沉降带北侧,早侏罗世时以辽西为主,中侏罗世时向西扩展到冀东,晚侏罗世时则以太行—燕山西段为主,早白垩世矿床广泛分布于全区,但Ⅲ成矿系列集中等间距分布在几条ＮＷ向带中。矿床这种时空分布规律受控于中生代花岗岩类岩浆活动,而中生代造山作用决定了岩浆岩的时空分布,岩浆起源演化与成矿有关。     

青藏铁路沿线不同类型挡沙墙阻沙率

基于风洞试验对青藏铁路沿线不同类型防沙措施防沙效果进行模拟研究,探讨了不同类型挡沙墙的防沙效果。结果表明：挂板式、轨枕式和箱式挡沙墙输沙率随高度基本呈递增缓变型趋势,最大输沙率低于20%;铃铛式和高立式聚乙烯（PE）网挡沙墙随高度呈递减陡降型趋势,距地表6~8 cm处为转折点,转折点以上输沙率随高度增大急剧减小,转折点以下输沙率随高度变化较为平缓,最大输沙率低于50%。随着风速的增大,各挡沙墙的阻沙率呈递减趋势：挂板式和轨枕式挡沙墙对风速的敏感性最弱,整体阻沙效果较优,可大范围推广;箱式挡沙墙对风速的敏感性较弱,建议在风速18 m·s^-1以下的地区使用;PE网挡沙墙防沙效果对风速的敏感性最强,建议在风速10 m·s^-1以下的地区使用。