断裂对碳酸盐岩地层储集空间的影响〖KH*9〗 ——以塔里木盆地轮古东地区奥陶系碳酸盐岩地层为例

轮古东地区主要发育两期断裂,断裂使碳酸盐岩地层形成了以大型溶洞占主导,网状构造裂缝和孔洞相辅的溶洞裂缝储集空间体系。早期断裂主要控制了瘤状灰岩尖灭线西北的潜山高地岩溶,形成深切峡谷式沟壑相连的古地貌,流体溶蚀裂缝形成溶洞为主的储集空间。晚期断裂一方面形成新的储集空间并将早期形成的未充填或半充填的裂缝和溶蚀孔洞沟通; 另一方面,为大气淡水进入下部岩层提供了通道,形成在奥陶系下部地层发育的水平潜流带和深部缓流带岩溶体系。此外,火山热液沿两期断裂进入碳酸盐岩地层,对通道附近的碳酸盐岩产生显著的溶蚀,主导了深部的岩溶作用。     

Structural-event framework for the eastern Yilgarn Craton,Western Australia,and its implications for orogenic gold

The NNW-trending tectonic grain of the eastern Yilgarn Craton (EYC) was established as a result of predominantly ENE–WSW directed extension (D1 and D3) and E(ENE)–W(WSW) (D2, D4) to NE–SW directed (D5) contraction. The result has been a succession of NNW-striking temporally discrete fabric elements, which can be difficult to interpret reliably at any single location. Despite this, many past workers interpreted the NNW-striking fabric as the result of only one regional contractional event, and used it as a marker for correlating structural events across the region. In order to unravel the complexity, this paper presents a new sixfold (D1–D6) deformation nomenclature based on >10,000 new mesoscale structural observations, including their kinematic analysis and cross-cutting relationships. These mesoscale data were referenced with regional 3D map patterns, stratigraphic-magmatic-metallogenic considerations, and deep seismic reflection images. This integrated geodynamic-architectural approach is applicable to solving structural-event histories in other polydeformed terrains. Gold mineralisation occurred during the first five events, but was particularly concentrated from D3 onwards. The D3 event marked the most profound change in the tectonic evolution of the EYC, with changes in greenstones, granites and tectonic mode (lithospheric extension and core complexes), with the first significant gold deposited within extensional shear zones that dissect the crust. Later contraction (D4) was imposed at a high angle to the previously established anisotropic architecture. The outcome was the creation of a new dynamic permeability framework, which resulted in gold mineralisation during NNW-striking sinistral strike-slip faulting and associated thrusting. A further stress switch (D5) further modified the architecture resulting in N- to NNE-striking dextral strike-slip faulting, and the final period of gold mineralisation, before late-stage extension (D6).     

孟连回林低温热液构造角砾岩型金多金属矿

对矿化蚀变带进行分析研究,矿床位于中-下石炭统接触裂隙破碎带中,总结成矿规律,建立找矿标志,为该区的地质找矿指明方向。     

哀牢山造山带构造演化及其两侧盆地耦合

哀牢山造山带的崛起和盆地耦合,对东西两侧沉降盆地的构造-沉积性质起关键性作用。转换构造性质不仅形成了逆冲推覆与走滑剪切联合作用的构造共生组合,形成两类不同性质的沉积盆地。     

Stochastic simulations of fault networks in 3D structural modeling

3D structural modeling is a major instrument in geosciences, e.g. for the assessment of groundwater and energy resources or nuclear waste underground storage. Fault network modeling is a particularly crucial step during this task, for faults compartmentalize rock units and plays a key role in subsurface flow, whether faults are sealing barriers or drains. Whereas most structural uncertainty modeling techniques only allow for geometrical changes and keep the topology fixed, we propose a new method for creating realistic stochastic fault networks with different topologies. The idea is to combine an implicit representation of geological surfaces which provides new perspectives for handling topological changes with a stochastic binary tree to represent the spatial regions. Each node of the tree is a fault, separating the space in two fault blocks. Changes in this binary tree modify the fault relations and therefore the topology of the model.     

应用探地雷达技术检测隧道衬砌质量

介绍了应用探地雷达检测隧道衬砌质量的原理及技术,阐述了该技术的基本方法及其数据图像处理过程。老木峪隧道衬砌质量检测结果表明,应用探地雷达技术检测隧道衬砌效果良好,其衬砌厚度检测误差在 5 %之内,并能准确检测出衬砌内布筋数量,对回填层密实程度也可作出粗略估计。     

用差示FT—Raman和^11B NMR光谱学研究四硼酸锂水溶液的结构

用差示 FT- Raman和 1 1 B NMR光谱学研究了四硼酸锂过饱和溶液的结构机理 ,结果表明硼酸盐过饱和溶液中存在的粒子有 :B(OH) 3、B(OH) 4- 、B3O3(OH) 4- 、B4O5 (OH ) 42 - 和 B5 O6 (OH) 4- ,其结构机理类似于四硼酸锂饱和溶液和其他碱金属四硼酸盐溶液的结构机理     

煤层节理及其工程地质意义

煤层节理在煤层中普遍发育, 它不仅是矿井构造研究的重要内容, 同时也是极其重要的工程地质因素。煤层节理影响煤层的结构构造和物性特征, 从而影响煤层采落特征、顶板工程性质、瓦斯运移规律和煤层气储运采工程地质条件。研究掌握煤层节理几何和力学特征, 可指导井巷工程布置、采掘工艺的选择、安全措施的采用和煤层气开发方案的制定。     

具有滞迟耗能装置的高层建筑结构的随机响应分析

本文提出了一个近似分析具有滞迟耗能装置的高层建筑的方法。结果被模拟为一个有滞迟非线性支座的悬壁梁。其控制方程由Ｒｉｔｚ法导出，用等效线性化方法分析。     

山地土地结构格局与土地利用优化配置

山地是具有高度和坡度的自然综合体,由此决定了土地芬异的序列及其结构格局的特殊性,形成土地空间格局,土地数量格局和土地格局等３种基本形式,格局分析可以揭示土地类型与功能的异质性和有序性,从而为全面认识土地类型群体的生态属笥与演替规律提供理论依据,为土地利用优化布置的实践提供科学指导。