新疆西天山玉希莫勒盖达坂一带铜金矿地质特征及找矿思路探讨

玉希莫勒盖达坂一带是新疆重要的铜金及多金属成矿区,通过前期的中小比例尺地质矿产调查和化探工作,已初步摸清该区的成矿机理、矿床类型及元素富集规律,在此基础上划分出玉希莫勒盖达坂铜金和旺江德克银铜两个找矿靶区,为该地区今后开展矿产普查指明了方向。     

移动GIS地质灾害信息采集系统的研究

计算机、无线网络、定位技术和数据库技术的快速发展,为移动GIS技术在地质灾害信息野外采集创造了有利条件。从传统的地质灾害信息采集中存在问题出发,介绍了移动地理信息系统的组成和移动GIS在地灾野外数据采集中的应用优势,分析了地质灾害信息采集系统的需求,对系统架构、终端设备、通信方式、功能模块进行了设计,并提出了系统实现的方式。     

江西省会昌县地质灾害及防治对策

会昌县是江西省地质灾害多发地区之一,通过近1a的考察研究,对该区的地质灾害现状、成因机制等取得了第一手的资料,对防灾减灾预案的提出有了可靠的依据,本文就此相关问题进行探讨。     

福建建瓯八外洋铅锌矿床地质特征及其成因分析

建瓯八外洋地区位于福建省重要的铜、铅、锌、金、银成矿远景区内,具良好的找矿前景。通过综合归纳矿区已有的地质资料,系统地阐述了八外洋铅锌矿区的地质和矿床特征,并通过区内及其外围宏观和微观信息的研究与对比,认为该矿床成因类型为海底火山喷发一沉积变质(热液改造)块状硫化物型矿床。     

基于GIS的地质勘察信息系统设计与实现

从地质勘察领域分析入手,揭示三类主要数据内容及其内在联系,把握地质勘察领域的实质问题。采用信息系统实现关键技术与方法,建立地质勘察领域UML可视化需求模型,构建系统的三层架构体系,设计系统功能可视化组件图和系统数据库结构图。此研究内容与方法在深圳市地质勘察信息系统中成功实现,研究成果被列为科技项目成果推广应用。     

渤海湾盆地基岩地质图及其所包含的构造运动信息

利用油气勘探资料编制的渤海湾盆地基岩地质图 ,分析了基岩露头分布及其反映的中、新生代构造运动特征。基岩地质图显示渤海湾盆地基底岩层受印支运动和燕山运动影响发育有一系列近EW向、NNE—NE向的褶皱和逆断层等挤压构造变形。基岩露头展布表明渤海湾盆地西部、北部在侏罗纪之前的剥蚀作用明显强于东部和南部地区。基岩地层形成的区域褶皱轴向及各亚构造层之间的不整合面接触关系反映出在下—中三叠统沉积之后至下—中侏罗统沉积之前的某个“关键时刻”渤海湾地区发生了一次重要的构造变革 ,导致早期的近EW向构造被NNE—NE向构造替代。而从区域应力体制来看 ,下—中侏罗统沉积之后渤海湾地区的区域构造环境发生了重要变化 ,从中生代早期的挤压构造环境变为以裂陷作用为主的构造演化时期     

基于案例推理的历史登陆战役地理环境分析

基于案例推理是智能决策辅助系统中的一种重要技术。本文结合历史登陆战役地理环境,对登陆战役所涉及的各种地理要素进行了分析,把登陆地域所涉及的领域背景知识表示成概念层次树形式,使数据的分布模式具有更强的可视性。将案例推理技术引用于历史登陆战役地理环境查询分析系统,研究案例库的结构设计、案例的组织和表示、地理环境处置规则的表示等。叙述了案例库的建立方法、属性权重算法和相似性度量算法,以及系统的结构和实现方法。     

PROSPECTING EXPLORATION

正20142599Chen Sanming(Guangxi Key Laboratory of Concealed Deposits Exploration,Guilin University of Technology,Guilin541004,China);He Yuzhou Block Model and Reserves Estimation of Panzhihua Iron Deposit Based on 3D Geological Modeling(Journal of Guilin University of Technology,ISSN1674-9057,CN45-1375/N,33(4),2013,p.610-615,9illus.,1table,15refs.)     

Effect of multilayered groundwater mounds on water dynamics beneath a recharge basin: Numerical simulation and assessment of surface injection

Interactions between groundwater mounds caused by a geologic layer contrast affect the efficiency of managed aquifer recharge in arid areas. However, research has rarely examined the roles of groundwater mounding size variations on soil water dynamics in a stratified vadose zone in response to a sustained infiltration source. Numerical experiments were conducted on a two-dimensional vertical-section domain using HYDRUS software to simulate the behaviours of two adjacent (upper and lower) groundwater mounds underlying an infiltration basin subjected to clay loam and sandy alternately-layered soil profiles. The model successfully predicted the volume and extent of perched water and approximated vertical travel times during events generating downward fluxes from the surface injection. The response time of the mounding width (lateral extension) to the surface injection was delayed as compared to that of the mounding height (vertical extension), especially for the lower water mound. The mounding heights and widths show a strongly positive correlation with the infiltration rates of both high- and low-permeability layers where the injected water mounded, while the water storage amounts in the high- and low-permeability layers were governed by the mounding height and width, respectively. Exploratory simulations were then employed to assess the dependence of groundwater mounding behaviours and recharge performances on surface injection strategies. Results suggest that, by reducing injection rate or shortening injection duration, the near-term fraction of the surface injection converted to deep recharge is likely to be increased due to the narrowed groundwater mounding size, which would be limited by the water-retarding effect of layer contrasts. This study has important implications for predicting and understanding multilayered groundwater mounding behaviours and associated water mass balance under the geologic stratification, and is expected to aid in optimizing the infiltration basin operation for aquifer recharge.     

塔里木盆地深反射地震资料处理

反射地震资料的属性与油气勘探的最终目标——油、气有密切联系。利用地震波场的属性中隐藏着识别油气藏的密码进行油气检测,是一项新的油气检测技术。有油气存在时其地震属性会在局部产生非常规变异,寻找这种变异的差异,就可以进行油气检测,这也就为油气圈闭的地球物理评价提供了基础。通过在塔里木油田的试验表明,上述检测油气的属性差异分析方法技术是有效的。建议在油气钻探之前,首先进行油气检测和圈闭评价,以减少风险,提高油气勘探的成功率。