甘肃东部陇山群中斜长角闪岩的形成时代和构造背景

陇山群中斜长角闪岩的地质－地球化学特征研究表明,斜长用问岩是分两期形成的,其Sm－Nd等时线年龄分别为983±22Ma和756±97Ma,源区为类似于现在洋中脊型的地幔,说明在中元古代形成的裂谷此时已趋成熟,具有相当的规模。微量元素和稀土元素的特征也支持该认识。作者认为斜长用闪岩的原岩是侵入陇山群的辉绿岩墙或基性岩脉,是800～1000Ma（晋宁期）裂谷作用的产物,裂谷活动的扩张速率为2～5cm／a。     

内蒙古黄土丘陵地区生态农业试点建设途径初探

分析了内蒙古自治区和林格尔县羊群沟村生态环境特点及农业持续发展制约因素及潜力，总结了在黄土丘陵地区进行生态农业建设的措施和途径，对羊群沟村进行生态农业建设３年来所取得的综合效益进行了分析。     

Barriers to the enterprise culture: new firm formation in the merchant city area of glasgow

The paper reports the study of a group of twenty‐two new firm founders in the retail sector, in the Merchant City, an historic part of inner Glasgow that has recently undergone a miraculous revitalisation in a vein similar to that of the Docklands areas of London and Liverpool. The principal aim is to indicate how far the long term unemployed will be involved in this particular part of the enterprise culture, whether directly, or indirectly as a result of expanded employment opportunities. The results provide an upper limit of what we could expect this type of economic development to achieve in less attractive areas. The study provides a useful comparison to previous work concentrated on the manufacturing sector and suggests that the results from such work apply across sectors.     

内蒙古自治区地质灾害与地质环境的关系分析

地质灾害的形成受地质环境条件中多种要素的综合控制,二者之间密切相关.这些要素包括地形地貌、气象特征、植被生态、地层岩性、地质构造、岩土体类型、人类工程活动.根据内蒙古自治区内地质灾害调查工作的研究程度及区内地质灾害的自身特点,以区内已发生灾害的大量统计数据为基础,定性分析了在何种地质环境条件下,才可能发育崩塌、滑坡、泥石流、地面塌陷灾害;定量分析了地形坡度、地形高差、沟谷流域特征、降雨量在某一具体分布范围内,才容易发育某种地质灾害;同时论述了人类工程活动对地质灾害的诱发作用.     

Planning and development

The paper describes the development role of the London Docklands Development Corporation and what sort of plan it uses. It describes the government initiative that promoted the regeneration idea and appraises the Dockland's approach. Finally, it discusses local authority involvement in the Urban Development Corporation's initiatives.     

A moving target: planning Britain's inner cities

The authors look at Britain's post‐war response to the challenge of the Inner Cities and attempts to account for this response's more obvious failings. The paper considers the challenge facing the planners and considers the nature of their response, concluding that the future of planning as a weapon in the armoury of public policy is assured.     

The continuing progress of the enterprise zone experiment: a note as to recent evidence

The latest evidence relating to the enterprise zone experiment in Britain is provided in a recent report published by the Department of the Environment. The note analyses this evidence to provide an indication of the scale of economic activity taking place within the zones. The note suggests that the simplified planning regime of the enterprise zones actually plays a relatively minor role in facilitating economic change and concludes that more detailed evidence is required in order to achieve a full understanding of the effects of enterprise zones.     

内蒙古境内部分地表水放射性水平研究

本文根据国家水中放射性元素检测方法和相关的技术规范,监测了内蒙古自治区境内部分地表水中的铀（U）、钍（Th）、镭（Ra-226）、总α和总β的剂量,并与内蒙古自治区本底数据和文献监测数据比较。结果表明,内蒙古境内部分地表水中放射性核素均在内蒙古自治区环境本底调查范围之内,与文献监测值比较基本一致,并低于国家限制浓度,生产生活使用该处地表水是安全的。     

高砷地下水中砷的形态检测

地下水中砷污染严重影响着人类的健康,砷的生态毒理效应主要取决于其存在形态。文章用阴离子交换柱对内蒙古杭锦后旗高砷地下水在现场进行分离,在室内用原子荧光光度计进行检测。总砷浓度范围为80~1172μg/L,其中A(sⅢ)浓度百分含量为75.37%~92.39%,A(sⅤ)和颗粒态砷浓度百分含量分别为0.56%~13.87%、5.87%~20.65%。形态分析结果表明,该地区主要是还原环境,且颗粒态砷占有一定的比例,这对于进一步研究砷的去除和砷的地球化学行为有一定的指导意义。     

稀土氨氮废水对黄河内蒙段水体污染及治理机理研究

在分析稀土生产工艺、稀土氨氮废水产生及废水水质具体情况的基础上,详细对黄河内蒙段氨氮污染状况,水质监测数据的时间和空间分布进行了剖析,提出了采用吹脱法治理稀土氨氮废水是切实可行的方法,同时对稀土产业今后的发展方向给出了建议。