西藏西部马攸木金矿床成矿流体的特征

马攸木金矿床是西藏最近发现的独立岩金矿床。对马攸木金矿床热液成矿期各矿化阶段石英中的流体包裹体温度与压力、盐度与密度、包裹体成分和H、O同位素诸方面的初步研究表明,成矿流体属中低温(198～259℃)、低盐度(3.10～7.08%NaCl)、低密度(0.85～0.93g/cm3)的流体,属(SO42-)Cl--(K+)Na+水化学类型,成矿环境为低压(22.7～26.7MPa)浅成(0.825～0.971km)环境。成矿流体可能主要来源于与大气降水有成因联系的地下热水。马攸木金矿床可能是与热泉相关的浅成中低温热液矿床。     

微地震台阵网天然地震层析成像技术在油田深层构造解析中的应用

天然地震层析成像相对于传统的反射地震方法而言是一种新的经济的勘探方法。这是由于天然地震层析成像所需的观测值直接来自于研究区下方发生的天然微地震,而反射地震却需要在研究区表面进行人工放炮。因此本工作是将天然地震层析成像方法应用于柴达木盆地西部某油田约100km2地区的深层构造的尝试性研究。626个地震事件的3289个P波到时的初步结果与研究区已知的大的构造吻合较好。该模型中非常显著的特征就是观测到一个北西向的背斜。此外,微地震的分布也与研究区中活动断裂带的位置基本一致。     

碧口群玻安质岩石地球化学及成岩构造环境

主量及微量元素系统对比表明,碧口南范坝、庙里湾地区的变质玄武岩具有低S、i低Ti、低P、高Mg#和高A l2O3/TiO2的特点,具有玻安质岩的地球化学特点;在N-MORB标准化元素配分图上,亏损高场强元素(Ti,Zr,Y),富集难熔元素(C r,Co,N i),稀土配分模式呈LREE亏损的左倾形式,表明本区岩石可能是早期经历过较高程度部分熔融后亏损难熔地幔楔橄榄岩,在有少量水参与的情况下发生部分熔融形成的。结合本区岛弧拉斑玄武岩的研究,本区玻安质岩石应来自于一个弧前消减环境,这一认识对于确定碧口火山岩系的构造属性具有重要意义。     

云的移动轨迹成像模拟及云量变化分析

以全天空数字成像仪的等角投影成像原理为基础，将云型简化为正方体及圆柱体云体。模拟了相同云体在不同空间位置的移动轨迹情况，对其所占面积变化（云量）进行了计算，并对云在移动过程中云体侧面成像情况做了分析研究。结果表明，云量随空间位置变化情况与云的宽高比相关，当宽高比大于某一值时云量随天项角（云所处位置）的增大先增大而后减小，反之则随着天顶角的增大而减小。     

西藏西部马攸木金矿床成矿流体的特征

马攸木金矿床是西藏最近发现的独立岩金矿床.对马攸木金矿床热液成矿期各矿化阶段石英中的流体包裹体温度与压力、盐度与密度、包裹体成分和H、O同位素诸方面的初步研究表明,成矿流体属中低温(198～259℃)、低盐度(3.10～7.08%NaCl)、低密度(0.85～0.93g/cm3)的流体,属(SO24-)Cl--(K )Na 水化学类型,成矿环境为低压(22.7～26.7 MPa)浅成(0.825～0.971 km)环境.成矿流体可能主要来源于与大气降水有成因联系的地下热水.马攸木金矿床可能是与热泉相关的浅成中低温热液矿床.     

ANALYSIS OF THE IMPACT OF URBAN GROWTH ON THE TEMPERATURE FIELD IN GUANGZHOU

Based on the 1973 – 2003 temperature data of Guangzhou meteorological station and 1980 – 2000 temperature data of Foshan airport, the variations of urbanization effect on temperature of Pearl River Delta (PRD) and Guangzhou city were analyzed. It was found that the temperature has increased significantly due to the PRD’s urbanization. During the last 20 years, Foshan airport’s temperature has increased by 0.7°C, and the Guangzhou city’s temperature increased by about 1.1°C during last 30 years. The heat island of Guangzhou city is obvious but has some differences from other big Chinese cities.     

中国城市化进程中基础设施建设和管理的问题与对策探讨

城市基础设施是城市赖以生存和发展的基础，是既为物质生产又为人民生活提供一般条件的公共设施。城市基础设施可以推动城市化进程，同时城市化也可以影响城市基础设施的发展。在阐明城市化进程和城市基础设施关系的基础上，分析了中国城市化进程中城市基础设施建设和管理的现状，并探讨了其存在的诸多问题，认为建立多元化的投融资格局、改革政府投资的决策和管理方式、积极推进城市基础设施行业的国有企业产权转换和机制转换将是中国城市化进程中优化城市基础设施建设和管理的必要举措。     

Frontogenesis, evolution and the time scale of front formation

Ｆｒｏｎｔｏｇｅｎｅｓｉｓ,ＥｖｏｌｕｔｉｏｎａｎｄｔｈｅＴｉｍｅＳｃａｌｅｏｆＦｒｏｎｔＦｏｒｍａｔｉｏｎＦａｎｇＪｕａｎ（方娟）ａｎｄＷｕＲｏｎｇｓｈｅｎｇ（伍荣生）ＳｅｖｅｒｅＭｅｓｏｓｃａｌｅｍｅｔｅｏｒｏｌｏｇｉｃａｌＲｅｓｅａｒｃｈＬａｂ...     

地方环境立法与可持续发展

地方环境立法指省级和省级政府所在地的市以及经国务院批准的较大的市的人民代表大会及其常务委员会制定地方性法规并分别依照法定权限和程序制定、修改或废止在本行政区域内具有普遍效力的各种地方性环境法规、地方性环境规章的活动.地方环境立法在中国的环境立法体系当中占有重要地位,对于中国的环境保护工作具有重大意义.可持续发展是联合国环境与发展大会确立的未来共同发展战略,中国地方环境立法应当将可持续发展作为指导思想,并因地制宜,具有可操作性、科学技术性、规范性和有效性.     

Geochemistry of sedimentary rocks and its relation to crustal evolution and mineralization in Southwest Yangtze Massif, China

Through a systematic study on trace elements and REE geochemistry of mudstone deposited in the basin and lower slope environments during Upper Proterozoic to Triassic in the Southwest Yangtze Mssif,three geochemical abnormal horizons of which the geochemical characteristics are quite different from those of other horizons have been established for the first time.They are the Lower Cambrian,the Upper Devonian and the Upper Permian,As compared with the crustal evolution in this area.these three geochemical abnormal horizons are corresponding to the pulling-apart periods of geotectonic cycles.which illustrates that uncommon depositional sources puring into the basin from the earth‘s interior may be one of the most important causes to originate the geochemical anomalies in these lhrizons.Thus it can be realized that the geochemistry of post-Archean sedimentary rocks has a great deal to do with the crustal evolution and it can be used as a tracer to analyze the crustal evolution.The elements in this area are mainly concentrated in these geochemical abnormal horizons,and the degree of enrichment and deficiency of trace elements in other horizons is very limited.A series of research on mineralization indicates that the main strata-bound ore deposits discovered in the Southwest Yangtze Massif occur in the Cambrian,Devonian and Permian-Trassic strata.The results of isotope tracer resarch have also proved that most of the metallogenic elements in these ore deposits came from the host strata.which illustrates that the geochemical abnormal horizons may have made great contributions to these ore-forming processes.Thus it can be concluded that it is only the particular horizons corresponding to the particular periode of earth‘s evolution that can they be the significant source beds because only in these uncommon horizons there can be highly enriched metallogeinc elements.which may be one of the most important reasons for explaining the time-bound nature of mineralization.