蓟县电厂主厂房场地的工程地质条件

本文通过对蓟县电厂主厂房冲击钻孔灌注桩施工的监理，在详勘地质报告与实际不符的情况下，经少量的补勘工作，弄清了场地的地质条件，用冲击钻孔的岩渣差别基岩风化程度，对场地进行了工程地质分区，使桩基施工缩短了工期，节约了造价，经检测，桩基强度完全满足了设计要求。     

用地要依法 依法有地用——华容县国土资源局认真落实土地调控政策

近年来，华容县国土资源局坚持依法管地，集约用地，大力加强建设用地管理，严格农用地转用审批，全面落实耕地占补平衡政策，既保证了县域经济发展的用地需要，又确保了全县耕地总量动态平衡，实现了“用地要依法，依法有地用”。     

青藏铁路昆仑山隧道稳定性分析

在地质构造分析，地应力测量，地应力场的反演和岩石力学实验的基础上，对昆仑山隧道多种断面的应力分布进行了有限元计算，给出了不同断面的应力分布图象，指出了不同断面应力分布的特点以及断面形状对应力分布的影响，同时计算了围岩的强度与应力比，对围岩稳定性进行了分析对比，优选了隧道断面形状。     

沥青铀矿的年龄测定方法改进

本文对核行业标准方法“沥青铀矿、晶质铀矿的年龄测定方法”进行了改进。主要采用同位素稀释高分辨等离子体质谱法（HR-ICP-MS)测定铀矿物中的铀含量，提高了测量的准确度，提高了分析速度。此外，改进了铀铅分离流程，降低了全流程本底，大大减小了样品用量，提高了TIMS法测定铅同位素组成的准确度。     

新暖棚法浇筑养护混凝土在肇源松花江特大桥桥基工程中的应用

混凝土冬季暖棚法是一个古老工艺，存在生产方式落后，生产效率低下，环境污染严重，运行成本高昂的弱点。论述了在古老工艺思维的基础上，充分发挥现代自动燃油加温设备的优势，通过输送蒸汽、吹送热风，满足了混凝土拌合、浇筑和养护的温度要求，保证了生产质量，实现了混凝土冬季施工。     

地质灾害综合评价在城市规划中的作用及管理模式

矿山城市地质条件复杂，工程活动强烈，地质环境改造频繁，地质灾害频发，给城市规划带来了一系列的问题，成为矿业城市可持续发展的瓶颈。以抚顺市采矿活动导致地质环境恶化地质灾害频发为例，简要的论述了城区地质环境及地质灾害与城市规划之间的关系，阐述了地质环境对城市规划的制约作用，指出了地质灾害评价为城市规划服务是一个综合性、跨学科的重大问题，提出了城区地质灾害危险性综合评价的方法，论证了地质灾害综合评价在城市规划中的地位，二者之间的相互作用以及规划管理的模式。     

塔里木盆地含气系统的划分及特征

本文根据油气系统的理论，划分了塔里木盆地含气系统，首次提出了天然气成因系统的概念，并进一步从剖面上划分了其含气组合，从平面上划分了天然气成因系统，分析了塔里木盆地含气系统的特征，对塔里木盆地天然气的勘探有一定的指导意义。     

深部地球物理探测数据库研究进展

国土资源部（原地质矿产部）“深部地球物理探测数据共享与对比研究”项目组在1998－2000年期间取得如下主要进展：（1）调研了数据分布和保存状态，抢救，收集分散的数据（约40565km），按入库技术规定进行了整理，汇总入库。所收集的数据约占应收集数据的92％；（2）制定了7个专业方法数据入库技术规定；（3）建立了7个专业方法数据标准格式，初步实现了规范化和标准化技术研究，为抢救，收集分散在各单位和个人的数据并入库提供了技术准备；（4）实现了数据载体及数据格式转换及不同载体间的转换与传递，使用刻盘技术将数据保存在光盘上；（5）引进先进的系统软件，研制与建立了7个专业数据子库管理软件系统，数据共享和光盘库系统和总库管理系统。编写了各数据子库使用指南，管理员手册，数据字典，数据统一编码，研究中开发应用了GIS、MAPGIS等先进软件，将专业方法理论与计算机技术结合，实现数据快速存储，多功能查询；（6）探索研究了数据共享原则和办法，提出了可行方案，推动了深部地球物理探测数据共享工作。     

四川地区断层空间分布的多重分形特征

断层系统多重分形避免了容量维Ｄ０的不足，考虑了每一条断层对整体分维的贡献，反映了断层的空间分布特征。根据四川地区断层分布图，运用多重分形理论检验了断层空间分布的自相似性，分区计算了四川地区各带的多重分维值。结果表明，断层破裂系统为分形结构，具有很好的自相似性，相关系数均达０．９９。不同带分维值的较大差异，反映不同构造区域的断层分布特点。最后，对分维的含义进行了深入探讨，对油气勘探的有利区域进行了分析。     

符竹溪地区化探找金（锑）研究及地质效果

本文研究了符竹溪金－锑矿床微量元素地球化学特征，对矿区岩、矿石微量元素进行了相关分析，筛选出对符竹溪地区金、锑矿有指示意义的Ａｕ，Ｓｂ，Ａｓ，Ｍｏ，Ｗ，Ｈｇ，Ｐｂ，Ａｇ，Ｔｌ，Ｂｉ等１０个指示元素。经分析对比，确定其实用性指示元素为Ａｕ，Ｓｂ，Ａｓ，Ｍｏ，Ｂｉ，Ｈｇ。利用这些元素的轴向分带规律及比值指标对该矿床深部进行了成矿预测，并已由探矿工程证实，见到了金品位高达４４×１０（－６）的矿体，因而扭转了该矿山矿石资源面临枯竭的局面，经济效益显著。同时，对整个符竹溪地区，即矿床边部及外围作了化探选区，选出了３个远景地段：矿床南部竹叶山地段、外围杨家冲地段和田庄湾地段。     

中国中新元古代重要沉积地质事件及其意义

地球曾经历了3次超大陆演化过程,其中2次超大陆(哥伦比亚(Columbia)和罗迪尼亚(Rodinia))旋回涉及中新元古代,并与一系列区域性事件相联系,形成了多成因的超大陆演化模型。华北中东部新元古代沉积事件、扬子和塔里木新元古代裂谷事件、雪球事件等都被视为Rodinia超大陆的裂解响应,它们对定时三大陆块相互关系及定位其在全球超大陆的位置具有至关重要的作用,也反映了重要沉积地质事件在超大陆研究中不可或缺的作用和意义。此外,在中新元古代的Columbia和Rodinia超大陆演化过程中,还伴随发育具有广泛区域性甚至全球意义的巨厚白云岩与碳酸盐岩微生物(岩)、红层与黑色页岩、全球性臼齿亮晶碳酸盐岩和埃迪卡拉纪盖帽碳酸盐岩等沉积事件群及元素(同位素)漂移等地球化学异常事件,也包括特殊且重要的磷块岩、锰、铁矿等沉积成矿事件。由于不断显示出来在全球古大陆重建和古地理恢复方面的重要作用,它们越来越得到学术界的广泛关注和研究。文中通过系统分析中国中新元古代超大陆旋回演化中发育的部分重要或关键地质事件(群)时空发育与分布特征,并结合作者团队的实际资料和测试数据,以期揭示超大陆演化过程与重要沉积地质事件的内在联系,为超大陆聚散旋回演化和时空定位及原型沉积盆地的发育和评价提供科学证据。     

Evolution of the European Cenozoic Rift System: interaction of the Alpine and Pyrenean orogens with their foreland lithosphere

The evolution of the European Cenozoic Rift System (ECRIS) and the Alpine orogen is discussed on the base of a set of palaeotectonic maps and two retro-deformed lithospheric transects which extend across the Western and Central Alps and the Massif Central and the Rhenish Massif, respectively.During the Paleocene, compressional stresses exerted on continental Europe by the evolving Alps and Pyrenees caused lithospheric buckling and basin inversion up to 1700 km to the north of the Alpine and Pyrenean deformation fronts. This deformation was accompanied by the injection of melilite dykes, reflecting a plume-related increase in the temperature of the asthenosphere beneath the European foreland. At the Paleocene–Eocene transition, compressional stresses relaxed in the Alpine foreland, whereas collisional interaction of the Pyrenees with their foreland persisted. In the Alps, major Eocene north-directed lithospheric shortening was followed by mid-Eocene slab- and thrust-loaded subsidence of the Dauphinois and Helvetic shelves. During the late Eocene, north-directed compressional intraplate stresses originating in the Alpine and Pyrenean collision zones built up and activated ECRIS.At the Eocene–Oligocene transition, the subducted Central Alpine slab was detached, whereas the West-Alpine slab remained attached to the lithosphere. Subsequently, the Alpine orogenic wedge converged northwestward with its foreland. The Oligocene main rifting phase of ECRIS was controlled by north-directed compressional stresses originating in the Pyrenean and Alpine collision zones.Following early Miocene termination of crustal shortening in the Pyrenees and opening of the oceanic Provençal Basin, the evolution of ECRIS was exclusively controlled by west- and northwest-directed compressional stresses emanating from the Alps during imbrication of their external massifs. Whereas the grabens of the Massif Central and the Rhône Valley became inactive during the early Miocene, the Rhine Rift System remained active until the present. Lithospheric folding controlled mid-Miocene and Pliocene uplift of the Vosges-Black Forest Arch. Progressive uplift of the Rhenish Massif and Massif Central is mainly attributed to plume-related thermal thinning of the mantle-lithosphere.ECRIS evolved by passive rifting in response to the build-up of Pyrenean and Alpine collision-related compressional intraplate stresses. Mantle-plume-type upwelling of the asthenosphere caused thermal weakening of the foreland lithosphere, rendering it prone to deformation.     

中国奥陶系和下志留统下部年代地层单位的划分

十多年来全球和我国奥陶系和下志留统下部年代地层研究取得很大进展 ,在前人所积累的大量成果和资料的基础上 ,结合近年来的研究 ,厘定了我国奥陶系和下志留统下部年代地层单位系统 ,建议分别以吉林浑江大阳岔 (或江西武宁或湖北宜昌黄花场 )、湖北宜昌黄花场、浙江常山黄泥塘、新疆柯坪大湾沟和湖北远安苟家垭剖面为界线层型 ,将中国奥陶系自下而上划分为 :新厂阶 (或特马豆克阶 )、道保湾阶、大湾阶、达瑞维尔阶、艾家山阶和钱塘江阶。为了客观反应我国奥陶系的特点 ,同时便于与全球年代地层单位界线对比 ,建议将上述各个阶底界的的界线依次划在 R.taojiangensis( =R.praeparabola) / H .simplex、 O.communis、 B.triangularis/ T.laevis、 U.austrodentatus、 N .gracilis和 N ankinolithus带的底部 ;中下奥陶统和中上奥陶统之间的界线分别定在道保湾阶 /大湾阶和达瑞维尔阶 /艾家山阶之间。建议下志留统最下部两个年代地层单位——龙马溪阶和大中坝阶——以湖北宜昌王家湾剖面为界线层型 ,分别以 A.ascensus和 D .triangulatus的首现为划分标志。对每一个阶的命名、含义、界线层型剖面的岩性特征、界线划分的生物标志、与全球相关年代地层单位层型和点 ( GSSP)的对比 ,以及与过去曾经建议或使用过?     

岩质边坡生态防护客土持水性与渗透性耦合作用试验研究

对于岩质边坡而言,生态边坡防护技术的关键在于植被的形成。为保证植物的生长,客土应同时具备良好的持水性 与渗透性。文章通过室内渗透实验以及蒸发实验研究了不同黄土、硅藻土、秸秆配比条件下渗透性及持水性的耦合关系。 结果表明硅藻土与秸秆的添加能有效降低混合土密度,有利于减小混合物的自重应力、提高边坡稳定性。硅藻土和秸秆单 独掺入时混合土的渗透系数呈指数形式增加,在同等材料用量时,硅藻土对于渗透系数的提高更有效,但当硅藻土和秸秆 以相近的比例掺入时,彼此之间没有形成相互增益,而是此消彼长。硅藻土及秸秆的添加均能增加混合土的持水性,但总 体上使用硅藻土的效果优于秸秆。添加硅藻土、秸秆能够延长土壤的定常蒸发阶段,极大提高了黄土的抗旱能力。     

冻融红砂岩损伤演化多尺度分析

以红砂岩为研究对象,进行冻融循环、CT扫描及力学特性试验,采用图像处理技术结合遗传算法寻优模型实现了0、5、10、20、40 次冻融循环后 CT 扫描图像的去噪、增强、分割及三维重构处理,通过对同一对象跨尺度的损伤识别与对比研究,建立了基于细观损伤的弹性模量劣化预测公式,并从材料细观结构的物理本质诠释了冻融红砂岩宏观力学行为。结果表明：基于图像最大熵值的遗传算法能够快速精确地选取阈值进行图像分割,实现对岩石细观结构中基质和缺陷的识别;随着冻融次数增加,岩石孔隙率上升、孔隙分维下降,细观尺度上呈现出孔隙扩展、数量增多,但结构复杂程度下降的演化行为;传统方法以有效承载面积、弹性模量为度量基准定义的宏、细观损伤变量未能全面考虑损伤物理机制和材料内部结构信息,宏细观损伤演化曲线差异较大;基于2种物理机制定义细观损伤变量和考虑岩石天然损伤定义宏观损伤变量,实现了损伤的宏-细观结合。最后通过冻融循环过程中细观结构演化与宏观力学响应之间的关系,提出了弹性模量劣化预测公式,并分析冻融砂岩孔隙大小及孔隙结构形态变化在损伤过程中占据的不同主导作用,根据细观结构的物理机制解释宏观砂岩冻融破坏的力学机制。     

Quality and durability assessments of the armourstones for two rubble mound breakwaters (Mersin,Turkey)

Due to economic reasons, natural stones (armourstones) of various sizes and qualities are very frequently used for the constructions of the breakwaters to protect coastal engineering structures from wave actions. Deterioration of the armourstones with time in the form of abrasion and disintegration may end up with the damage of the structures. Therefore, it is necessary to investigate the long-term performance and quality of the armourstones, which should be sound and durable. Mersin and Kumkuyu harbours were constructed using four different limestones obtained from two quarries. The limestones have different characters and site performances. In this study, the material and mass properties of the limestones taken from the quarries with known site performances as armourstones are investigated. The site performances and durability of the limestones are compared with the field measurements and laboratory works. Thus, the information obtained is used to assess long-term durability of the armourstones. The long-term performance of the Degirmencayi and Tirtar upper level limestones are observed to be good whereas it is rather poor for the Tirtar middle and lower level limestones. Comparison between the predicted and observed durabilities of the armourstones indicated that CIRIA/CUR, RDI_d, RERS, and wet to dry strength ratio give better results based on their field performances. However, the prediction of the durability of the limestones is poor in case RDIs, average pore diameter, and saturation coefficient are used.     

Lower Carboniferous (Dinantian) stratigraphy and structure of the Walterstown-Kentstown area,Co. Meath,Ireland

Stratigraphic units are defined and described for the Lower Carboniferous succession in the Walterstown-Kentstown area of Co. Meath, Ireland. A complete (unexposed) Courceyan succession from the terrestrial red bed facies of the Baronstown Formation to the Moathill Formation of the Navan Group has been penetrated in several boreholes. Although the lower part of the sequence is comparable with the Courceyan succession at Navan and Slane, the middle part of the sequence differs markedly in the Walterstown-Kentstown area and two new members, the Proudstown and Walterstown Members, are defined in the upper part of the Meath Formation. Syndepositional faulting was initiated during the Courceyan, probably in latest Pseudopolygnathus multistriatus or early Polygnathus mehli latus time. Movement on the ENE trending St. Patrick's Well Fault influenced the deposition of the Walterstown Member and the overlying Moathill Formation and was probably associated with the development of the East Midlands depocentre to the south of the area. A second episode of tectonism in the latest Courceyan or early Chadian resulted in uplift and erosion and the development of ‘block and basin’ sedimentation. Subsequent transgression of the uplifted block led to the establishment of the Kentstown Platform, bounded to the north, west and south by rocks of basinal facies. The Milverton Group (Chadian-Asbian), confined to this platform, unconformably overlies Courceyan or Lower Palaeozoic strata and is subdivided into three formations: Crufty Formation (late Chadian), Holmpatrick Formation (late Chadian-Arundian) and Mullaghfin Formation (late Arundian-Asbian). The Walterstown Fault controlled the western margin of the Kentstown Platform at this time. Contemporaneous basinal sediments of the Fingal Group (Lucan and Naul Formations) accumulated to the west of the Walterstown Fault and are much thicker than age-equivalent platform facies. Platform sedimentation ceased in latest Asbian to early Brigantian time with tectonically induced collapse and drowning of the platform; platform carbonates of the Mullaghfin Formation are onlapped northwards by coarse proximal basinal facies of the Loughshinny Formation. A distinct gravity anomaly in the Kentstown area suggests the presence of a granitoid body within the basement. The Kentstown Platform is therefore considered to have formed on a buoyant, granite-cored, footwall high analogous to the Askrigg and Alston Blocks of northern England.     

土石坝混凝土防渗墙的非线性分析

采用Duncan-Chang E-B模型描述土的非线性特性,接触单元模拟防渗墙和土石坝之间的相互作用,利用非线性有限元程序计算了土石坝和防渗墙的应力和变形。结果表明：坝体应力状态和变形性质主要取决于坝体断面设计形式,防渗墙在一定范围内起作用;防渗墙材料不同对坝体应力与变形的影响主要由材料的刚度决定,刚性防渗墙对垂直沉降的制约作用明显;柔性防渗墙适应变形的能力强,但对位移的影响较大。对坝体稳定,刚性防渗墙的垂直变形是主要控制因素,关键部位在墙的底部;柔性防渗墙的水平位移是主要控制因素,关键部位在坝体的中下部。     

The Variscan Millares granite (central Pyrenees): Pluton emplacement in a T fracture of a dextral shear zone

This work deals with the magnetic susceptibility and its anisotropy (AMS) in the Variscan Millares pluton in the Central Pyrenees. The zonation of low-field magnetic susceptibility is consistent with the concentric arrangement of rock-types, with more basic compositions at the external areas. Magnetic foliations defined from AMS strike NE-SW and dip gently towards the NW. Magnetic foliations are mainly perpendicular and oblique to the elongation of the pluton in map view (NW-SE) and show a concentric pattern at the central part, where the more acid rocks crop out. Magnetic lineations are scattered between NW-SE and NE-SW and plunge shallowly to the N. In map view magnetic lineations are distributed in domains normal to the elongation of the pluton. The contours of P' (degree of magnetic anisotropy) are oriented NE-SW and bands of oblate and prolate ellipsoids alternate perpendicular to the elongation of the pluton in map view. P' is between 1.009 and 1.055 in 93% of the specimens. Such low values are currently recorded in granites having magmatic fabrics and for which the anisotropy is mainly carried by biotite. The attitude of the magnetic foliation and the magnetic lineation, the geometry of the pluton, and their relationship with the host-rock structure suggest an intrusion contemporary with a transpressional regime, syntectonic with the late stages of the Variscan orogeny.