石门雄黄矿一号窿矿体构造及深部找矿研究

通过对湖南石门雄黄矿一号窿矿区构造研究 ,雄黄矿床赋存于燕山期形成的背斜核部 ,背斜与断裂、断裂与断裂的交汇部位。在多种手段综合研究的基础上 ,指出了矿区导矿构造为 EW向的 F1、F3 断裂 ,容矿构造为次级的 NEE、NE、NW、SN向断裂构造 ;提出了本区中生代的三期主要构造应力场 ,其中 SN向主压应力的构造应力场共轭角高值区为雄黄矿体富集地带。矿床受寒武系娄山关群白云岩、奥陶系灰岩和构造的双重控制。认为在一号窿主矿体 NW、SW方向可能存在有隐伏矿体     

地壳浅部导电性矿物的一种新的压溶机制：应力原电池过程

以黄铁矿为例,通过导电性矿物的力学-电化学相互作用实验,得出：导电性矿物的电极电位与弹性轴压应力是较好的负线性相关关系。以此为基础,通过电化学理论分析,得出：地壳浅部与溶液接触的导电性矿物颗粒内部存在各种各样的应力原电池,通过应力原电池过程,压溶作用得以实现。导电性矿物应力原电池引起压涛作用的发现,无疑对诸如构造地球化学、地电化学甚至湿法冶金等领域的有关研究具有重要意义。     

福建两个块状硫化物矿床中磁黄铁矿结构的研究

福建大田前锋梅仙块状硫化物矿床中六方磁黄铁矿中的单斜磁黄铁矿有两种交生态：受结晶方位控制的叶片状交生和受颗粒边界、裂隙控制的不规则状交生。着重由六方磁黄铁矿在冷却过程中出溶形成,而后者则是单斜磁黄铁矿交代六方磁黄铁矿的结果。叶片状交生体经历后期变形、变质后产生粗化和均一化,形成了楔形边、箱形、得杂叶片等结构。单斜磁黄铁矿在变形较弱的矿区保存较好,而在强烈部位消失殆尽,说明应力对磁黄铁矿的均一化效应     

Recent tectonic stress field research in Shanxi graben system

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Tertiary compressional structures on the Faroe–Rockall Plateau in relation to northeast Atlantic ridge-push and Alpine foreland stresses

A number of compressional anticlinal structures are identified in the western and northern part of the Faroe–Rockall Plateau. These structures occur on that part of the Faroe–Rockall Plateau which was above sea level during the latest phase of Paleocene plateau basalt extrusion. Three post-basalt compressional phases have affected the plateau. Most of the compressional structures in the northern part of the plateau are related to NE–SW- to ENE–WSW-oriented stress which we date to Late Paleocene–Early Eocene. The Oligocene phase is interpreted as resulting from N–S-directed compressional stress which also mainly affected the compressional structures on the northern part of the plateau. Compressional stress from the northwest seemed to affect the whole of the Faroe–Rockall Plateau and we suggest it to be of Miocene age. It is proposed that during the Late Paleocene–Early Eocene phase of compression local structure, and anomalously oriented gravitational ridge-push from the now extinct Aegir Axis contributed to a local NE–SW compressional stress system. The two later deformation phases were apparently connected to the regional northwest European stress system with small local modifications.     

Thermoelastic stress due to a rectangular heat source in a semi-infinite medium. Presentation of an analytical solution

The thermoelastic response due to a time-dependent rectangular heat source in a semi-infinite medium is analyzed. The problem originates from studies of nuclear waste repositories in rock. Canisters containing heat-emitting nuclear waste are deposited over a large rectangular area deep below the ground surface. The solution for a time-dependent heat source is obtained from the corresponding instantaneous heat source by superposition. The thermoelastic problem for the instantaneous rectangular heat source in a infinite surrounding is solved exactly. An important step is the introduction of so-called quadrantal heat sources. The solution for the rectangle is obtained from four quadrantal solutions. The solution for the quadrantal heat source depends on the three dimelasionless coordinates only. Time occurs in the scale factors only. The condition of zero normal and shear stresses at the ground surface is fulfilled by using a mirror heat source and a boundary solution. The boundary solution accounts for the residual normal stress at the ground surface. Using a Hertzian potential, a surprisingly simple solution is obtained. The final analytical solution is quite tractable considering the complexity of the initial problem. The solution may be used to test numerical models for coupled thermoelastic processes. It may also be used in more detailed numerical simulations of the process near the heat sources as boundary conditions to account for the three-dimensional global process.     

1927年古浪8级大震地表破裂特征及形成机制

野外考察结果表明,１９２７年古浪８级大地震造成了６段不同规模、不同方向、不同力学成因、不同等级的地表破裂,构成了呈面状分布的复杂地震破裂带,与我国西部地区由走滑断层运动形成的破裂带相比具有较大差异。其中的４段破裂与极震区及余震分布的位置相重合,主体散布在冬青顶北麓一带,沿皇城－双塔活动断裂的东段和武威－天祝活动断裂北段分布,是１９２７年古浪地震的主破裂带。其余两段分别分布在Ⅸ度区内的皇城－双塔断裂中段和西山堡－滴水崖断裂带上,是高烈度区内的次级破裂。４段主破裂是在统一构造应力场作用下形成的产物,具有统一变形机制。其中冬青顶张性破裂带是发育在山前下方寨－严家新庄逆断层上盘的次级张性破裂,而主破裂是由逆断层运动在寺儿沟滩等处的山前洪积台地上产生的     

长白山天池火山地震观测与应力状态的初步研究

１９９７年６～９月在长白山天池火山区布设了数字化流动地震观测台网,对长白山火山地震活动进行了近震源观测,获取了大量与火山活动相关的地震信息。通过本次观测及资料处理,对长白山火山地震及其所反映出的应力状态有了一定的认识,为长白山火山活动研究提供了科学依据。     

二郎山公路隧道轴线地应力测试研究

介绍了二郎山公路隧道轴线上3个钻孔的地应力测试结果,应用水压致裂法在钻孔中测试,所测的两个不同大小的水平主应力都大于垂直主应力（除了地表以下很浅处外）,这个地应力与区域大地构造方向一致,在此基础上评价了隧道碉室围岩的稳定性。     

构造应力作用下流体运动的动力学分析——构造流体动力学

本文从流体动力学的基本规律出发,应用渗流力学、岩土力学及弹性力学的理论及方法,推导出了考虑应力状态的可变形介质中流体运动的动力学方程,由该方程可以看出：应力状态是影响流体运动的一个非常重要的因素,它通过３种方式来影响流体的运动,其一是：应力的作用改变介质的渗透性能,从而影响流体运动;其二是：平均正应力的变化速率影响介质的含流体能力,它以源汇项的形式反映在方程中;其三是：应力的作用影响流场的初始状态及边界状态,通过影响定解条件反映在动力学方程中,从而影响运动特征。构造应力场对流体运动的最终影响是这３方面作用