吉林省双阳水库灌区灌溉水源置换可行性研究   总被引：1，自引：0，他引：1  

迟宝明  戴长雷  易树平  李治军 《世界地质》2003,22(3):284-289,312

双阳水库供水为优先满足城区需求和农业可持续发展,其水库灌区需进行灌溉水源置换。基于时序分析与回归分析的迭合模型模拟预测双阳水库来水量和区间降水量,并采用迦辽金有限单元数值差分法对区间地下水系统进行模拟求解,计算结果表明,新条件下灌区可能获得的水资源量为4 026.6×104m3/a;大于总需水量3 314.6×104 m3/a;从资源承载力的角度看,水源置换是可行的。对区内现状及规划中的取供水工程分析计算可知,灌区工程供水能力可达3 536.0×104 m3/a,大于总需水量;从工程承载力的角度看,水源置换亦是可以实现的。同时注意到,即使在水源置换以后,灌区的水供应对双阳水库的依赖程度仍然很高,如果水库对城区的供水量大幅增加,则灌区在置换后建立的水资源平衡将可能被打破。  相似文献   

昌化明矾石地鸡血石的矿物学研究   总被引：6，自引：0，他引：6  

牟莉  崔文元 《岩石矿物学杂志》2004,23(1):69-74

运用电子探针、X射线衍射、红外光谱、扫描电镜等分析手段对浙江昌化里梅总洞口新发现的明矾石地鸡血石进行了研究，认为其“地”的矿物成分主要是明矾石，仅有少量迪开石和高岭石。  相似文献   

西双版纳山地不同森林景观鸟类多样性     

王直军  ChrisCarpenter 《山地学报》1998,(3)

研究了在不同形式人类经济活动下的森林景观变化与西双版纳地区鸟类多样性的关系．同时对发展生产时的用地布局和维护森林景观的动态发展与提高人们生活质量和持续发展的关系进行了讨论．  相似文献   

1996年南黄海6.1级地震构造背景及异常特征     

郭爱香  刁守中  马玉香  王红卫  冯志军 《高原地震》1998,(1)

利用黄海与东海海底地貌、海底活动构造研究成果,对1996年11月9日南黄海6．1级地震地质构造背景做了初步分析。根据震前对南黄海地区的震情追踪表明,这次地震前震中100～200km范围内无明显的测震学异常现象,而异常主要分布于南黄海中、北部地区,认为南黄海6．1级一类地震的地点预测是十分困难的。  相似文献   

综合注浆法在岩溶复杂地基处理工程中的应用   总被引：1，自引：0，他引：1  

刘秀萍  钟志均 《地质与勘探》1998,34(5):56-59

介绍了综合注浆法施工工艺,以及该技术在岩溶复杂地基处理工程中的应用。  相似文献   

金顶铅锌矿床相关地质问题及成因探讨   总被引：10，自引：2，他引：10  

牟传龙  余谦 《矿物岩石》2004,24(1):48-51

云南兰坪金顶超大型铅锌矿，同时也是大型黄铁矿、大型石膏和天青石矿，对其成因存在较大的分歧，主要有热液充填交代型、层控后生型矿床、同生沉积矿床和喷流(热水)沉积矿床等观点，尤以喷流(热水)沉积矿床占主导地位。实际上，要分析矿床的成因，探明其相关的地质问题，如矿区地层和沉积相、赋矿层位和灰岩角砾岩的成因等是至关重要的，也是研究和讨论该矿床成因和类型的前提条件。在大量充分搜集前人的研究成果基础上，结合野外的实际考察和室内综合研究，对在研究矿床成因时不可忽视的一些地质问题进行详细研究结果表明：金预铅锌矿床赋存于景星组(K1j)和早第三系云龙组中,并受后期推覆断裂的控制；赋矿层位地层的古环境为极浅水环境(河湖和盐湖环境)；所发现的证据更支持金顶铅锌矿属后生充填型层控矿床的观点。  相似文献   

Coastline configuration and geomorphologic development mode of arc-shaped coast in South China     

DAI Zhijun  LI Chunchu 《地理学报》2004,14(4):473-480

Coastline configuration indexes of 34 typical arc-shaped coasts in South China are investigated by the method of principal component analysis, and meanwhile deposition and geomorphologic features of arc-shaped coast are also analyzed. The results show: (1) The configuration of arc-shaped coast in South China is of the characteristic of variability and complexity. (2) The wave power and the openings of the bay are the decisive factors to result in the changes of the configuration of the arc-shaped coast in South China, however, incidence direction of the wave has no effect on configuration development of the coast. (3) Commonly, geomorphologic modes of the arc-shaped coast system in South China consist of barriers, lagoons and tidal-inlets, and can be divided into four types: the openings of the bay leaning to the east, the openings of the bay leaning to the south, the openings of the bay leaning to the west and the openings of the bay leaning to the north.  相似文献   

Recent developments in study of the typical superimposed basins and petroleum accumulation in China:Exemplified by the Tarim Basin     

JIN Zhijun  WANG Qingchen 《中国科学D辑(英文版)》2004,47(Z2)

Most of petroliferous sedimentary basins in China have experienced multiple phases of tectonic evolution and deposition, and are characterized by tectonic and depositional superimposition. The term "superimposed basin" is suggested to describe those basins which consist of two or more simple prototype basins superimposing vertically and/or coalescing laterally. The characteristics of petroliferous superimposed basins are "multiple stages of basin forming and reworking, multiple layers of source rocks, multiple periods of hydrocarbon generation and expulsion, multiple periods of petroleum migration-accumulation-escape". Therefore,applying the wave process analysis method to studying the process of basin formation, hydrocarbon generation, and reservoir formation, and then establishing theory of "petroleum accumulation system" is helpful to enhancing petroleum exploration efficiency in superimposed basins.This paper will, based on case study in the Tarim basin, report the major developments in studying basin formation, hydrocarbon generation and petroleum accumulation. In study of basin formation, (1) geophysical comprehensive profiles reveal that the Tarim plate has been subducted beneath the Tianshan orogenic belt with an interfinger structure and that the deep structure in the eastern section of the Tianshan orogenic belt is different from that in the western section. (2) The vertical variation in debris and geochemical composition reveals the nature and Mesozoic-Cenozoic evolution history of the Kuqa Depression. (3) Field investigation and paleostress reconstruction show that the Kuqa Depression has undergone gravity-driven extension in sedimentary cover when the Tianshan uplifted vertically. In hydrocarbon generation study, new developments include (1) setting environmental index to judge high grade source rocks in marine carbonates, and (2) establishing the lower limit of the organic carbon content for effective carbonate source rocks. In petroleum accumulation study, (1) methods of determining paleopressure and paleotemperature of forming fluid inclusions have been established. (2) The petroleum source analysis has indicated that the crude oil in the Lunnan and Tahe oilfields are derived from the source rocks of the Middle and Upper Ordovician. (3) Three generations of oil inclusions from the Lunnan oilfield have been recognized and dated.  相似文献   

海南屯昌为火山岩构造属性及其年代学研究   总被引：10，自引：2，他引：10  

丁式江  许长海等 《岩石学报》2002,18(1):83-90

海南屯昌变火山岩与下古生界长英质片岩互层产出，其原岩为钙碱性粗安－安山岩和流纹岩组合，它们与海相碎屑岩一想构成岛弧环境的沉积－火山岩系。岩石化学特征表明，该变火山岩系属于岛弧区玄武质岩浆分异的产物，而玄武质岩浆产生则与富集型MORB地幔（FMM）经历中等程度部分熔融有关。变火山岩Ti相对于Zr和Y严重亏损可能与岛弧区俯冲深度有限相关，而其εNd（527Ma）（8．3－9．9）与P、Ti、Nb、K、Ba、Sr和Ce负异常一并指示交代富集型地幔源区（可能为EMII）的特点。锆石U－Pb年代学证实屯昌变火山岩形成于527Ma，并经历过印支期热－构造事件的叠置改造，通过研究变火山岩系将为约束海南岛及其邻区特别是特提斯域构造演化事件提供某些重要信息。  相似文献   

当代沉积学研究的新进展与发展趋势——来自第三十一届国际地质大会的信息   总被引：8，自引：0，他引：8       下载免费PDF全文

刘宝珺  王剑  谢渊  徐强  牟传龙  朱同兴  罗建宁  谭富文  李忠雄 《沉积与特提斯地质》2002,22(1):1-6

本文为笔者根据第三十一届国际地质大会的200余篇与沉积学相关的论文摘要综合编写而成。评述了当代沉积学研究的最新进展与发展主要，主要包括:碎屑岩、碳酸盐岩及混合沉积的环境变化及其演变；沉积盆地分析与大地构造沉积学；层序地层学；冰川事件沉积学；全球变化沉积学；环境沉积学；资源沉积学；生物礁及白云岩成因；碳酸盐成岩作用等。重点阐述了现代沉积学研究应向多学科交叉渗透、多种高新技术的引用和多领域应用的方向发展。未来沉积学研究以人类的生存与发展所依托的环境、气候和资源为服务对象，才会有更加旺盛的生命力和美好的未来。  相似文献