湘西新元古界—寒武系中锑砷存在相态研究

应用部分提取技术研究湘西地区新元古界－寒中武系锑和砷元素的存在相态表明,岩石中以可交换离子,与碳酸盐有关,与硫化物有关和赋存于硅酸直放物晶格的４种形式存在的锑元素分别占岩石中锑总量的１８．６５％,０．８５％,３１．４１％和４３．８１％,砷则分别为７．０５％,４．２９％和５６．１１％和２９．１８％,呈易迁移相态存在锑和砷分别为５５．９１％和６７．４５％,在含硫开放体系中,岩石中元素的淋滤率与其中易迁     

吉林大安油田储层裂缝的综合评价

本文在岩芯描述和三维有限元数值模拟的基础上,对大安油田裂缝的分布特征,发育规律,分组裂缝所起作用及其对开发的影响等方面进行了综合评价。大安油田储层中发育了受沉积微相和构造控制的四组裂缝。     

福建地壳各岩类铜元素丰度及铜的矿源层（岩）讨论

根据福建省最新岩石测量成果得出的各岩类铜元素丰度,讨论和初步确定了福建铜的矿源层（岩）。提出可按照丰度值高低,铜的初始赋存状态与被解离的难易,有无矿床（点）及具找矿意义的异常产出这３项因素,进一步将矿源层（岩）划分为较可靠的、可能的和潜在的３个级别。     

辽西火山岩型金矿地质特征及成因讨论

辽西火山岩型金矿分布在中生代陆相火山盆地边缘活动带内,受辽西弧形构造带控制,为火山期后热液矿床,可初步划分为3种成因类型:次火山(斑岩)热液型(二道沟式),火山—次火山热液型(红石砬子式)和爆发角砾岩型(水泉式),成矿作用与中酸性火山—次火山岩关系密切,成矿时代为燕山期(90—110Ma)。稳定同位素研究结果表明,含矿热液为富含挥发组份和多金属成矿元素的富金水溶液,来源于地壳深部或上地幔,即高温热卤水对镁铁质、超镁铁质岩石长期侵蚀、淋滤和溶解,获取大量的金属成矿元素,在不透水层之下形成深部液态矿源层。     

Data collection methodology for dynamic temperature model testing and corroboration

This article describes a data collection approach for determining the significance of individual heat fluxes within streams with an emphasis on testing (i.e. identification of possible missing heat fluxes), development, calibration and corroboration of a dynamic temperature model. The basis for developing this approach was a preliminary temperature modelling effort on the Virgin River in southwestern Utah during a low‐flow period that suggested important components of the energy balance might be missing in the original standard surface‐flux temperature model. Possible missing heat fluxes were identified as bed conduction, hyporheic exchange, dead zone warming and exchange and poor representation of the amount of solar radiation entering the water column. To identify and estimate the relative importance of the missing components, a comprehensive data collection effort was developed and implemented. In particular, a method for measuring shortwave radiation behaviour in the water column and an in situ method for separating out bed conduction and hyporheic influences were established. The resulting data and subsequent modelling effort indicate that hyporheic and dead zone heat fluxes are important, whereas solar radiation reflection at the water surface was found to be insignificant. Although bed conduction can be significant in certain rivers, it was found to have little effect on the overall heat budget for this section of the Virgin River. Copyright © 2009 John Wiley & Sons, Ltd.     

红层泥岩半刚性基床结构动态变形试验研究

高速铁路要为列车的高速行驶提供一个高平顺性和稳定性的轨下基础,而路基作为轨道结构的基础,必须具有强度高、刚度大、稳定性和耐久性好的特性。由于红层泥岩属于软岩,工程稳定性差,以红层泥岩作为基床的填料,其刚度明显不足,所以为了弥补基床表层的不足,在其顶部添加一层水泥稳定级配碎石。为了验证这些措施的效果,以便指导工程设计和施工,通过足尺动态模型试验,模拟在实际荷载条件下基床的动态变形特性,结果表明,采用水泥稳定级配碎石作为基床表层填料,静态变形明显降低,能够大幅降低动荷载作用时的动变形,减少了基床结构的永久变形,增强了轨道结构的稳定性。     

舒兰煤田水曲柳区煤层气分布规律及利用方向浅析

舒兰煤田水曲柳区煤层气在平面上富气中心分布与富煤中心一致。该区煤层气属特低丰度、中等埋深的小型煤气田。适宜井下瓦斯抽采。可在建井后,在瓦斯富集部位煤层底板岩巷中,采用钻孔抽采方式,可回收近1.8亿m3煤层气,不但提高了资源的利用率,还将减少环境污染,提高了煤矿生产安全度,具有显著的经济意义和社会效益。     

三峡蓄水后典型河段分形维数的变化分析

针对三峡工程蓄水后下游河道河床表面形态的变化,采用分形维数对河床表面形态进行量化,并分析河道冲淤调整特点,对河床表面分形维数(BSD)的变化特点及物理意义进行探讨。结果表明,BSD与河床各个剖面形态之间的关系是整体与部分的关系,BSD能全面地反映床面形态的复杂程度。三峡蓄水后,宜昌-虎牙滩和宜都河段BSD明显增大,关洲河段增大幅度较小,而芦家河河段BSD值略有减小,同时,各河段BSD的变化可在一定程度上表征三峡蓄水后下游河道河床综合阻力的调整结果。可通过对各河段演变趋势的分析,来预测其BSD的变化,进而为分析其阻力和水位的变化趋势提供依据。     

Geological Evolution of Longhushan World Geopark in Relation to Global Tectonics

The South China fold belt has experienced a complex series of tectonic events that span 1.0 billion years of earth history. Longhushan (龙虎山) World Geopark is located on the Proterozoic suture between the Yangtze craton and Cathyasia block and highlights the long history of this belt. Collision of the Cathyasia and Yangtze cratons 1.0 billion years ago was associated with the formation of the Rodinian supercontinent where most of the planet's landmasses were amalgamated into one block. Jurassic through Early...     

西峰油田三叠系延长组长2_2砂层组沉积相分析

通过对西峰油田三叠系延长组长22砂层组的泥岩颜色、岩石类型、沉积构造、生物化石、沉积层序以及单井相等的研究,认为延长组长22油层主要沉积相为正常三角洲沉积。三角洲平原是该区三角洲砂体堆积的主体。可进一步辨别出分流河道、天然堤、分流间湾及决口扇4个微相。