浙江桐庐火山侵入杂岩的地球化学特征

The Tonglu volcano-intrusive complex belongs to a calci-alkalic rock series. The geochemistry of major and minor elements in the rocks is characteristic of the differentiation and the evolution of the calci-alkalic series. The rare-earth distribution patterns in the rocks and minerals indicate that rhyolitic, rhyodacitic and quartz ttachyandesitic magmas responsible for the volcano-intrusive complex are comagmatic. The Rb-Sr isotopic relationship in the rocks suggests that the earliest volcanic activity in western Zhejiang may commence at Middle Jurassic. The magma responsible for the Tonglu volcano-intrusive complex originated from partil melting of the lower crust. The derivation of upper mantle material was introduced upwards through deep faults, which would accelerate partial melting of the lower crust.This magma seems to have been contaminated slightly by upper crustal material during the process of upward intrusion.     

封闭式组合膜结构的动力时程分析

由于索膜结构的变形具有明显的非线性,使得传统的谱分析计算会带来的较大的误差,利用ANSYS有限元程序,对封闭式组合膜结构进行了自振特性计算,并输E l Centro水平波进行了动力时程分析。结果表明,对于索膜结构,时程分析方比谱分析法更为可靠;索膜结构耦合现象明显,结构响应复杂,地震下的位移变化显著;所讨论的封闭式组合膜结构工程中,中部和两侧膜面区域的地震反应较大,起封闭作用的膜面在地震作用下性能良好。     

北塘凹陷古近系沙河街组三段沉积特征及储层的影响因素

北塘凹陷古近系沙河街组三段储层储集物性差是造成其油藏产量偏低的主要原因。在观察岩心、分析沉积相和沉积体系平面分布的基础上，利用大量岩心物性数据和其他地质资料，系统讨论了其储层特征及影响储层储集性能的主要地质因素。认为北塘凹陷古近系沙河街组三段主要发育扇三角洲、滑塌重力流、湖相等类型沉积相，发育北部和西部两个物源，主要含油气区塘沽、新村等地区位于两个物源的交汇区，以发育中等-差储层为主，影响储层发育的主要因素包括原始的沉积相带、成岩作用（压实作用、胶结作用和溶解作用等）、油气成藏时间、油藏异常压力以及火成岩分布等。     

泰来镇地下水开发利用规划

本文在分析泰来镇地下水开发利用现状的基础上,结合泰来镇经济发展规划及镇内供水矛盾等实际情况,提出了泰来镇供水规划方案,即选择地表水作为泰来镇近远期供水方案,选择地下水作为泰来镇供水应急方案.     

滦平上侏罗统—下白垩统扇三角洲露头层序地层学研究

在油田开发中,地层划分与对比是十分重要的研究内容,从油田开发到调整等各个阶段,对地层划分与对比的要求越来越高。但油田地下资料是有限的,第一,当井网密度达到一定程度时,不是可以无限制加密的;第二,油田所能获取的占绝对优势的地下信息是通过测井,而测井分辨率又是有限的。所以,高分辨率层序地层学被广泛应用和发展的过程中,野外露头研究是必不可少的。笔者以露头资料为研究对象,对露头区扇三角洲高频层序、准层序、准层序组的剖面识别标志进行了总结,定量研究了不同成因类型砂体的分布规律、几何形态、内部结构和非均质性。把高分辨率层序界面的露头标志向井下岩心和测井信息进行转化,并在露头研究的基础上总结层序地层对比的一般原则。     

同位素密度扫描成像系统的数据处理方法

这里介绍了自行研制的同位素密度扫描成像系统,在考古应用中的数据采集以及数据处理方法。此方法在野外和现场文物埋藏情况的分析方面,具有十分重要的意义。通过对考古现场(金沙遗址)的实际应用发现,其分析结果清楚明了,探测深度可达0.5m～0.8m。     

The Relationship between Fractures and Tectonic Stress Field in the Extra Low-Permeability Sandstone Reservoir at the South of Western Sichuan Depression

The formation and distribution of fractures are controlled by paleotectonic stress field,and their preservative status and effects on development are dominated by the modern stress field. Since Triassic,it has experienced four tectonic movements and developed four sets of tectonic fractures in the extra low-permeability sandstone reservoir at the south of western Sichuan depression. The strikes of fractures are in the S-N,NE-SW,E-W,and NW-SE directions respectively. At the end of Triassic,under the horizontal compression tectonic stress field,for which the maximum principal stress direction was NW-SE,the fractures were well developed near the S-N faults and at the end of NE-SW faults,because of their stress concentration. At the end of Cretaceous,in the horizontal compression stress fields of the NE-SW direction,the stress was obviously lower near the NE-SW faults,thus,fractures mainly developed near the S-N faults. At the end of Neogene-Early Pleistocene,under the horizontal compression tectonic stress fields of E-W direction,stress concentrated near the NE-SW faults and fractures developed at these places,especially at the end of the NE-SE faults,the cross positions of NE-SW,and S-N faults. Therefore,fractures developed mostly near S-N faults and NE-SW faults. At the cross positions of the above two sets of faults,the degree of development of the fractures was the highest. Under the modern stress field of the NW-SE direction,the NW-SE fractures were mainly the seepage ones with tensional state,the best connectivity,the widest aperture,the highest permeability,and the minimum opening pressure.     

青海高原生态环境演变特征及态势分析

在广泛收集和整理青海省荒漠化、水资源、草地资源等典型生态环境因子资料基础上,对青海高原典型生态环境演变特征进行了基础性的分析。大量研究结果表明,在气候变化和人类活动的共同驱动下,近几十年中处于高海拔脆弱生境中的青海高原已出现了明显地生态环境退化现象,青海高原气候异常事件频繁、草场退化、土地沙化、冰川萎缩、湖泊水位下降和河流流量减少等一系列生态环境问题日益突出。揭示了自然灾害与生态环境恶化相互关系的机制,分析了未来气候变化情景下青海生态环境演变态势。以配合青海省生态环境建设的基础性、战略性和前瞻性研究,为青海省生态环境与社会经济的协调发展,水土资源的可持续利用提供科学依据。     

基于Midas-GTS的三峡库区金鸡岭滑坡成因机制与稳定性分析

金鸡岭滑坡在暴雨后发生明显变形,通过现场勘察、钻探、物探、深部位移监测以及水平位移监测得出初步结论。为进一步查明该滑坡成因机制,通过解译现有勘察监测资料,结合Midas-GTS软件分析不同工况下滑坡的渗流场、位移场、稳定性计算,综合评价其成因机制。结果如下：（1）物探解译得出金鸡岭滑坡为岩土混合、含水滑坡,滑动面位于T2b1泥灰岩和T2b2泥岩分界线;（2）深部位移监测揭示该滑坡为浅表层土体在发生滑移,滑动面与物探解译得出的滑动面位置一致;（3）水平位移监测表明浅表分布的后梆滑坡和潘家岭滑坡变形速率较快,变形强烈;（4）数值模拟结果显示金鸡岭滑坡在现状工况下处于基本稳定状态;在排干地下水工况下处于基本稳定状态;在暴雨工况下处于欠稳定状态,可能产生整体滑移,其上的潘家岭滑坡及后梆滑坡产生土体次级滑移。（5）金鸡岭滑坡的地形地貌、地质构造、地层岩性、为滑坡的形成和发展提供了物源和场地条件,暴雨和人类工程活动作为诱发因素,进一步加剧滑坡变形。该研究成果将为三峡库区类似滑坡的成因机制与稳定性分析提供理论依据,对后期防治措施具有重要指导意义。     

地理空间信息应急保障供应链研究

在卫星影像制作的DOM和DEM基础上,利用侦查无人机拍摄的影像照片,在DOM底图上计算目标的精确坐标和对DLG数据进行及时更新,满足了应急保障需要。