黄石市板岩山危岩体成因机理分析与防治对策研究   总被引：1，自引：0，他引：1  

程康 《工程地质学报》2000,8(2):202-205

本文论述了黄石板岩山危岩体地形、地貌及地质构造特征 ,分析讨论了其成因机理 ,得出危岩体已处于蠕变后期 ,位移变形趋于稳定。不会再次发生大规模的整体倾倒破坏 ,提出了活石清理、裂缝顶部加盖排水指导的防治措施。  相似文献   

Variability of the transgressive stacking pattern under environmental changes control: Example from the Post-Glacial deposits of the Gulf of Lions inner-shelf,Mediterranean, France     

Caroline Labaune  Michel Tesson  Bernard Gensous 《Continental Shelf Research》2008

At a regional scale, high-resolution seismic dataset analysis provides an accurate image of the stratigraphic organization of the Post-Glacial transgressive deposits of the Gulf of Lions inner-shelf. Architectural and stratigraphic characteristics are different in four main sectors, clearly demonstrating that depositional models have to be adapted from place to place following the interplay of various genetic factors.  相似文献   

济南市泉群喷涌的控制性参数计算及供水保泉宏观调控措施研究   总被引：4，自引：0，他引：4  

李福林  马吉刚  李玉国  金丽  陈学群  王德辰  吴兴波  卢朝霞  赵德岭 《中国岩溶》2002,21(3):188-194

济南市泉群喷涌经历了自流期、自流- 季节断流期、季节性断流或长年断流期、人工调控期等几个历史阶段。本文在分析济南市四大泉群喷涌历史演变的基础上,利用统计资料,首先建立泉群年平均喷涌量与年最低地下水位之间的定量方程,得出四大泉群喷涌的底限水位与最低景观流量的对应关系,然后,计算泉域内地下水的入渗补给量,再得出保证泉涌的地下水最大允许开采量的控制性参数。最后,结合保泉供水的实际需求,提出扩大地表水供应量、开辟新水源、实施多种形式的人工回灌以及调整供用水结构、实施分质供水等宏观调控措施。   相似文献   

大屏幕显示系统技术的应用     

刘在涛  盛家伦  梁曙东  杨桂岭  吴天安  杨亚莉 《地震》2001,21(4):142-147

大屏幕显示系统,是抗震救灾指挥的重要技术组成部分,其作用是方便有关领导直观的了解灾情和部署抗震救灾工作。文中介绍了大屏幕显示系统的软、硬件组成情况,各组成部分的主要作用和工作原理,控制软件的使用包括模式的使用和信号的测试等。  相似文献   

河西走廊荒漠化防治及生态农业建设的对策   总被引：20，自引：5，他引：15  

康玲 《中国沙漠》1999,19(2):195-198

对河西走廊荒漠化现状做了调查及分析,并对河西地区经济发展,荒漠化防治,水土资源的合理利用,实施可持续发展等方面进行了研究。分析了河西走廊荒漠化形成的自然环境特征、区域现状和人类不合理活动等多种因素作用下,加剧了河西的土地荒漠化;探讨了河西地区环境协调发展及荒漠化防治;针对各类生态系统中存在的问题,提出了科学、合理的对策建议。  相似文献   

攀钢石灰石矿滑坡机制及防治措施研究     

王正国  田小宝 《地质灾害与环境保护》1999,10(1):42-46

针对攀钢石类石矿生产过程中产生的滑坡,分析滑坡的地质背景,滑坡的产生机制及原因,产一生产实际提出防治措施,以保证生产安全。  相似文献   

The Central Submarine Canyon in the Qiongdongnan Basin, northwestern South China Sea: Architecture, sequence stratigraphy, and depositional processes   总被引：7，自引：0，他引：7  

Chenglin Gong  Yingmin WangWeilin Zhu  Weiguo LiQiang Xu  Jinmiao Zhang 《Marine and Petroleum Geology》2011,28(9):1690-1702

Submarine canyons have been the subject of intense studies in recent years because of their close link to deepwater systems. The Central Canyon is a large unusual submarine canyon in the northwestern margin of the South China Sea, has a total length of about 425 km and is oriented sub-parallel to the continental slope. Using integrated 2D/3D seismic, well log, core, and biostratigraphy data, the current study documents the stratigraphic framework, internal architecture, depositional processes, and controlling factors of the segment of the Central Canyon located in the Qiongdongnan Basin.The integrated analysis shows that the canyon fill consists of four 3^rd-order sequences, SQ4, SQ3, SQ2, and SQ1. Each of them is bounded by regionally important erosional surfaces (3^rd-order sequence boundaries). Within each 3^rd-order sequence there is maximum regressive surface separating a regressive systems tract in the lower part and a transgressive systems tract in the upper part. Nine facies are identified and are further grouped into five depositional units, DU1 through DU5.The canyon evolved through four cut-and-fill stages, with a change from predominantly axial cut-and-fill to primarily side cut-and-fill. Axial cut-and-fill dominated during the first stage, and the slope-subparallel paleo Xisha Trough was intensely eroded by large-scale axial gravity flows. During the second cut-and-fill stage, the Central Canyon experienced both axial and side cut-and-fill. The third stage was dominated by side cut-and-fill. The canyon was eroded and fed by slope channels that transported sandy sediments from the shelf to the north during regression, and was covered by side-derived muddy MTCs during transgression. The last stage was also dominated by side cut-and-fill. The canyon, however, was filled predominantly by side-derived muddy MTCs.Evolution and depositional processes in the Central Canyon were likely controlled by slope-subparallel negative-relief induced by paleo-seafloor morphology, structural inversion of the Red River Fault and the slope-subparallel basement faults. Additionally, Coriolis force, sea-level fluctuations, high sedimentation rate, and rapid progradation of the slope also controlled and influenced the depositional processes, and internal architectures of the canyon.  相似文献   

Hydrochemical characteristics and controlling factors for waters’ chemical composition in the Tarim Basin,Western China   总被引：1，自引：0，他引：1  

Ying Bo  Chenglin Liu  Pengcheng Jiao  Yongzhi Chen  Yangtong Cao 《Chemie der Erde / Geochemistry》2013

This paper covers the chemical and isotopic composition of river water, groundwater from wells (15–25 m), saline spring water and stagnant surface water providing evidence for controlling factors of water composition and water evolution process in the Tarim Basin, Xinjiang, western China. Analytical data for major and minor ions of totaling 537 water samples were obtained from both years of teamwork and old reference materials. It is found that the ion background value ratio SO₄/Cl for river water (2.75) of the Tarim Basin is two times higher than that of the Qaidam Basin (0.88) and 18 times higher than seawater (0.14); K/Cl of these two basins (0.06 and 0.07) are all two times higher than seawater (0.02). This reveals that material sources of Lop Nur are relatively richer in potassium and sulfate, while poorer in chloride. Gradual changes of stable isotopic compositions in waters clearly indicate the effect of evaporation on water evolution of the basin. Besides evaporation and weathering of surrounding rocks, wide distribution of chloride type water, which commonly exist in saline springs/brines and seldom exist in other waters, indicates that hydrothermal Ca–Cl brines discharged from deep within the earth join water evolution of the basin.  相似文献   

大理州漾濞塔盘山锑-金矿床     

杨世坤 《云南地质》2008,27(1):53-58

以往工作对象是锑矿,伴生、独立存在的金矿未被重视。本文认为塔盘山锑、金矿床是富有机质的盆地热卤水以及古海水与深大断裂引起的韧性剪切带有关的低温变质热液改造矿床,有望找到中-大型金矿床。  相似文献   

保山核桃坪区多金属矿成矿相关性及典型矿床   总被引：1，自引：1，他引：0  

王泽传  张兴恒  崔子良  杨鹏魁 《云南地质》2008,27(2):181-188

深部隐伏酸性岩体形成（或侵入）产生的含矿气水热液沿断裂向上运移,在特定地质条件下反复充填交代成矿。地下水渗透或环流则从围岩或先期形成的矿床中溶解出矿质,在有利条件下沉积,形成地下水热液矿床或与先期矿床叠加。  相似文献