中国加入WTO对长江三角洲地区产业发展的影响   总被引：4，自引：0，他引：4  

沈玉芳  张超 《世界地理研究》2003,12(4):65-70

加入WTO对中国的经济运行环境和区域经济走势将带来深远的影响。长江三角洲地区是我国最有潜力和条件参与较高层次国际竞争的地区之一，但是该地区计划经济体制的影响较深，区域经济发展的问题和制约因素突出。因此，利用新的视角开展中国加入WTO对长江三角洲地区产业发展的影响的综合研究，对我国21世纪地区经济的发展和走向具有重要的指示意义。本文通过对长江三角洲地区产业发展的现状和主要问题作了探讨，并在此基础上，对中国加入WTO对长江三角洲地区产业的冲击力进行了评估和判断。本文认为，为应对中国加入WT0后所带来的冲击，抓住发展机遇，提高区域整体竞争力，长江三角洲地区各城市有必要形成共识，规范和统一地方政府行为，在充分发挥市场机制作用的条件下，对区域产业调控机制和模式作重新构思，以进行区域产业分工体系和区域产业分布格局跨省市、全区域的合作与协同调整。  相似文献   

'In the shadow of hierarchy': meta-governance, policy reform and urban regeneration in the West Midlands   总被引：3，自引：0，他引：3  

Mark Whitehead 《Area》2003,35(1):6-14

This paper explores the relationship between political hierarchy and the complex webs of political organization associated with urban governance. Deploying the concept of meta-governance and a study of urban policy reform in the West Midlands region of England, this paper claims that state and governmental hierarchies continue to have a crucial role in coordinating the activities of governance regimes in the UK. This paper concludes by considering the effects of hierarchical power on the systems of political participation and representation that are associated with urban governance.  相似文献   

Regional characteristics of dust events in China     

WANG Shigong  WANG Jinyan  ZHOU Zijiang  SHANG Kezheng  YANG Debao  ZHAO Zongsuo 《地理学报》2003,13(1):35-44

The regional characteristics of dust events in China has been mainly studied by using the data of dust storm, wind-blown sand and floating dust from 338 observation stations through China from 1954 to 2000. The results of this study are as follows: (1) In China, there are two high frequent areas of dust events, one is located in the area of Minfeng and Hotan in the South Xinjiang Basin, the other is situated in the area of Minqin and Jilantai in the Hexi Region. Furthermore, the spatial distributions of the various types of dust events are different. The dust storms mainly occur in the arid and semiarid areas covering the deserts and the areas undergoing desertification in northern China. Wind-blown sand and floating-dust not only occur in the areas where dust storms occur, but also extend to the neighboring areas. The range of wind-blown sand extends northeastward and southeastward, but floating-dust mainly extends southeastward to the low-latitude region such as the East China Plain and the area of the middle and lower reaches of the Yangtze River. Compared with wind-blown sand, the floating-dust seldom occurs in the high latitude areas such as North Xinjiang and Northeast China. (2) The affected areas of dust storms can be divided into seven sub-regions, that is, North Xinjiang Region, South Xinjiang Region, Hexi Region, Qaidam Basin Region, Hetao Region, Northeastern China Region and Qinghai-Xizang (Tibet) Region. The area of the most frequent occurrence of dust storms and floating-dust is in South Xinjiang Region, and of wind-blown sand in the Hexi Region. In general, the frequency of dust events in all the seven regions shows a decreasing tendency from 1954 to 2000, but there are certain differences between various dust events in different regions. The maximum interannual change and variance of dust events during this time happened in South Xinjiang Region and Hexi Region. The dust events generally occur most frequently in April in most parts of China. The spring occurred days of dust events occupied 60-70% of the whole year in Hetao Region and Northeastern China Region. However, in South Xinjiang Region and North Xinjiang Region, which was less affected by monsoon climate, dust events may occur at any time of the year, less than 50% of the events in this region occur during spring. In the remaining three regions 50-60% of the dust events occur in spring of a year.  相似文献   

A FOOD GEOGRAPHY OF THE GREAT PLAINS     

BARBARA G. SHORTRIDGE 《Geographical review》2003,93(4):507-529

ABSTRACT. This article explores the regional identity of the Great Plains through its foodways using 744 responses from a mailed survey that asked participants to plan a representative menu for their locale. The strongest association is with beef—not surprising in an area known for cattle ranching. Other commonalities include potatoes, beans, and corn. Differentiation within the region is marked by preparation methods for beef as well as emphases on cornbread and peach cobbler in the south, rhubarb pie in the north, tortillas and sopapillas in the southwest, and pickles in two separate clusterings.  相似文献   

埃达克岩及其成矿作用和相关问题的讨论   总被引：10，自引：1，他引：10  

张静 《矿物岩石地球化学通报》2003,22(4):365-371

本文初步探讨了埃达克岩与相关大型矿床的关系，指出与埃达克岩浆有关的分异同化作用在一定条件下可以形成大型矿床；同时也强调了成矿后矿床保存的重要性。由于造山带的剥蚀速率快，导致和埃达克岩浆演化密切相关的形成于地壳浅部的大型斑岩矿床的保存有时限。因此在中国东部及“三北”地区中生代以前的造山带中，埃达克岩能否作为寻找相关大型矿床的标志值得商榷；但在新生代的西藏地区则是有可能的。近十年的研究认为中国东部侏罗纪—白垩纪的类似岩石并不属于埃达克岩系列，而是橄榄安粗岩及高钾钙碱性岩石系列。它们主要来源于富集地幔的部分熔融(不排除有下地壳物质混染的可能)及其后的结晶分异；一些中生代的斑岩型铜—金矿床和浅成低温热液矿床与此有关。  相似文献   

洁居纳卓组:西藏措勤地区的上新统岩石地层单位          下载免费PDF全文

石和  陶晓风  马润则  刘登忠  胡新伟 《沉积与特提斯地质》2003,23(2):20-22

分布于措勤县城一带的一套地层在1：100万日喀则幅区调中校划属上新统乌郁群，由下部火山岩和上部沉积岩组成。在1：25万措勘县幅区调中，根据获得的同位素年龄值已将下部火山岩地层划归古新统的典中组，而上部的沉积地层中含圆笠虫等有孔虫化石应属下白垩统。在这一地区还新发现一套陆相碎屑地层，根据其岩性组合、ESR年龄值及区域地层对比，本文将其新命名为上新统洁居纳卓组。  相似文献   

内蒙古中部召河庙地区金矿成矿规律及找矿预测     

陶继雄  许立权 《华南地质与矿产》2003,(1):33-38

总结了召河庙地区金矿的成矿规律，指出本区所发现的具一定规模的金矿（化）点在区域上主要集 分布于青灰窑子－大井－程二沟－东柜一线，矿体均为含金石英脉。容矿岩系为新太古代变质石英闪长岩、斜长岩花岗岩。成矿物质来源主要为古老的变质中基性深成侵入岩，即所谓广义的绿岩带。矿源岩中金物质的活化受深断裂作用、韧性剪切作用、退变质作用、变质流体以及岩浆热液的多重影响，其中以构造作用和岩浆热液最为重要。金矿的形成时期较长，主成矿时期在元古代。预测程二沟－白音查干－东柜一带为今后进一步寻找金矿的优选靶区。  相似文献   

Cascaded Evolution of Mantle Plumes and Metallogenesis of Core- and Mantle-derived Elements   总被引：1，自引：0，他引：1  

NIU Shuyin  HOU Quanlin  HOU Zengqian  SUN Aiqun  WANG Baode  LI Hongyang  XU Chuanshi Institute of Geology  Geological Survey  Shijiazhuang College of Economics  Shijiazhuang  Hebei  Institute of Geophysics  Chinese Academy of Sciences  Beijing Institute of Mineral Resources  Chinese Academy of Geological Sciences  Beijing 《《地质学报》英文版》2003,77(4):522-536

Mineral deposits are unevenly distributed in the Earth's crust, which is closely related to the formation and evolution of the Earth. In the early history of the Earth, controlled by the gravitational contraction and thermal expansion, lighter elements, such as radioactive, halogen-family, rare and rare earth elements and alkali metals, migrated upwards; whereas heavier elements, such as iron-family and platinum-family elements, base metals and noble metals, had a tendency of sinking to the Earth's core, so that the elements iron, nickel, gold and silver are mainly concentrated in the Earth's core. However, during the formation of the stratified structure of the Earth, the existence of temperature, pressure and viscosity differences inside and outside the Earth resulted in vertical material movement manifested mainly by cascaded evolution of mantle plumes in the Earth. The stratifications and vertical movement of the Earth were interdependent and constituted the motive force of the mantle-core movement.  相似文献   

豫西南铅锌银矿集区深部构造与成矿作用   总被引：2，自引：0，他引：2  

燕长海  刘国印  邓军 《华北地质》2003,26(4):221-227

豫西南地区是我国中部重要的多金属成矿远景区，找矿前景巨大。本文中利用重力、航磁和深部地球物理剖面资料，解析研究区三维岩石圈结构，揭示深部构造特征，进而探讨深部成矿作用。结果表明，研究区莫霍面顶面形态基本上呈东高西低，地壳厚度由东向西增大。壳-幔结构的不均一性制约着成矿系统物质和能量的交换。矿集区位于幔向斜内，其地壳增厚处、莫霍面的梯度变化处或变形部位成矿强度大。幔背斜与幔向斜之间过渡带有走向超壳型深大断裂(如栾川断裂和朱阳关断裂)，其与次级断裂的交汇处，岩浆、变质与成矿作用十分强烈，深部通道为成矿物质来源提供了较好的成矿条件，因此是形成大型、超大型矿床的有利地段。  相似文献   

层序地层学在区域地质调查中的应用     

邹光富  陈永明  夏彤 《四川地质学报》2003,23(1):1-4

在四川北部广元地区1：5万区域地质调查填图工作中，应用层序地层理论和方法，对测区古生代一中生代海相沉积地层进行了详细划分，利用层序地层对岩石地层单位界线进行了优化，从而提高了测区地层划分对比的精度和预测地质体的能力，使岩石地层单位的划分更为合理。建立了测区岩石地层单位，并论述了层序地层与岩石地层的相关性，提出了层序地层在沉积岩区1：5万区调地质图面的表达方式。  相似文献