优化开发区域制造业企业迁移的因素及其区域影响——以广东东莞市为例   总被引：5，自引：1，他引：4  

梁育填  樊杰  柳林  张有坤  陈小良 《地理研究》2013,32(3):497-506

优化开发区域是区域发展的较高级阶段,其内部企业迁移的规律比较复杂。选择制造业发达地区——广东东莞市为案例区,采取半结构式访谈法和调查问卷法探讨优化开发区域制造业企业迁移的影响因素及其区域影响。研究表明,现阶段东莞市劳动密集型企业迁出和资本技术密集型企业迁入并存,劳动密集型企业迁出是要素成本、环境管制、区域依赖性和地方政府博弈相互作用的结果,而产业基础、区域创新要素、产业政策和区域软环境等因素促进资本技术密集型企业的迁入;企业迁移可以促进区域产业升级转型,提高区域生产空间质量和优化区域国土空间结构。  相似文献   

我国东部沿海三大经济区区域经济的空间自相关分析     

陈逸  吴健平 《测绘科学》2013,38(3)

本文以我国东部沿海三大经济区域——环渤海、长三角、珠三角为研究对象,依据空间统计学的空间自相关方法,采用以高速公路里程数为影响因子改进的空间权重矩阵,以及全局和局部Moran I指数模型,通过ArcToolbox空间分析工具分析三大区域经济空间格局。研究结果表明,长三角与珠三角区域发展呈显著的空间正相关,长三角地区较之其他两地区发展最为成熟,发展极辐射大。同时地理环境对于区域经济发展作用明显,发展核心城市集中于沿江地区或平原地区。  相似文献   

建立大型线路工程独立坐标系的方法     

陶叶青  杨娟  徐长海 《测绘科学》2013,38(4):155-156

本文结合大型线路工程控制测量实例,分别对根据E1、E2、E3椭球建立适合大型线路工程独立坐标系的GPS方法进行阐述。应用实测数据对采用不同椭球作为投影面得到的平面距离进行比较,结果表明,应用区域性椭球建立的GPS平面控制网的控制测量成果适合国家测量规范的要求。  相似文献   

Generation and study of satellite gravity over Gujarat,India and their possible correlation with earthquake occurrences     

T. J. Majumdar  R. Bhattacharyya 《国际地球制图》2013,28(4):269-280

High-resolution satellite gravity data have been generated and utilized to infer subsurface geological structures in the area of devastating earthquake that struck the Bhuj region in Gujarat on 26 January 2001. Latitudinal gravity profiles have been generated in the Bhuj, Anjar and IBF regions across the epicentres (23.5° N, 69.8° E/M_w 7.0 in 2001; 23.2° N, 70° E/M_w 7.0 in 1956; 24.2° N, 69.2° E/M_w 7.8 in 1819). Substantial differences in gravity anomaly patterns as high as 37 mGal could be observed existing near the epicentre regions. These gravitational differences might have caused due to the plate tectonic processes and due to the changes in densities of different lithospheric zones/sedimentary layers. Temporal variations of the satellite-derived gravity and their probable relations with already occurred major earthquakes in this region have been studied. Hence we conclude that drastic changes in gravity anomalies can be considered as a precursor for occurrences of substantially large earthquakes.  相似文献   

Climate Warming Mitigation from Nationally Determined Contributions     

Bo FU  Jingyi LI  Thomas GASSER  Philippe CIAIS  Shilong PIAO  Shu TAO  Guofeng SHEN  Yuqin LAI  Luchao HAN  Bengang LI 《大气科学进展》2022,39(8):1217-1228

Individual countries are requested to submit nationally determined contributions (NDCs) to alleviate global warming in the Paris Agreement. However, the global climate effects and regional contributions are not explicitly considered in the countries’ decision-making process. In this study, we evaluate the global temperature slowdown of the NDC scenario (?T = 0.6°C) and attribute the global temperature slowdown to certain regions of the world with a compact earth system model. Considering reductions in CO₂, CH₄, N₂O, BC, and SO₂, the R5OECD (the Organization for Economic Co-operation and Development in 1990) and R5ASIA (Asian countries) are the top two contributors to global warming mitigation, accounting for 39.3% and 36.8%, respectively. R5LAM (Latin America and the Caribbean) and R5MAF (the Middle East and Africa) followed behind, with contributions of 11.5% and 8.9%, respectively. The remaining 3.5% is attributed to R5REF (the Reforming Economies). Carbon Dioxide emission reduction is the decisive factor of regional contributions, but not the only one. Other greenhouse gases are also important, especially for R5MAF. The contribution of short-lived aerosols is small but significant, notably SO₂ reduction in R5ASIA. We argue that additional species beyond CO₂ need to be considered, including short-lived pollutants, when planning a route to mitigate climate change. It needs to be emphasized that there is still a gap to achieve the Paris Agreement 2-degree target with current NDC efforts, let alone the ambitious 1.5-degree target. All countries need to pursue stricter reduction policies for a more sustainable world.  相似文献   

广西云开地区区域成矿模式     

安国英  雷英凭 《矿产与地质》2012,26(2):89-94

通过对广西云开地区区域成矿特点和区域构造演化阶段的讨论,选择区内主要矿床的控矿地质因素、成矿时代、物质来源等特征进行对比,并根据典型矿床成矿模式概括区域成矿模式。指出加里东期、华力西-印支期、燕山期为本区矿床的成矿期,这是对广西云开地区成矿环境的认识进一步深化,以期指导区域矿产评价和找矿部署工作。  相似文献   

简述北京永定河沿岸的地质背景     

吕金波 《城市地质》2012,7(1):4-7

永定河之名诞生于1698年。永定河跨越延庆盆地、北京西山和北京平原3大地貌单元,是北京的母亲河。门头沟区为永定河山峡,有沿河城断裂、马兰黄土和永定河断裂等地质现象,应考虑沿岸的地学旅游开发;石景山区为永定河冲洪积扇的顶部带,应考虑城市地下空间发展的布局;丰台区横跨永定河两岸,有卢沟桥、河西的长辛店砾岩与河东的古河道,应考虑防止地下水污染的措施;房山区位于永定河西岸,有房山世界地质公园、董家林西周遗址和良乡地热田,应考虑地学旅游开发和低炭经济发展;大兴区位于永定河东岸,有以庞各庄西瓜为代表的永定河沙带作物、南海子湿地和亦庄工业开发区,应考虑沙地农作物的分区与工业开发区的关系。永定河沿岸5区的开发要考虑地质背景,实现科学发展观。  相似文献   

胶东金矿成矿构造背景探讨     

李洪奎  禚传源  耿科  梁太涛 《山东地质》2012,(1):5-13

在编制1∶50万山东省大地构造相图基础上,通过对大地构造相研究显示：胶东微地块是经多期增生和碰撞而形成的,其漫长的板块构造演化明显具有阶段性。侏罗纪是该区板块构造演化史上的一个重要转换期,构造演化由原来的南、北分异转变为东、西分异,胶东地区NE向新生构造起了主要作用。胶东地区中生代有2次重要的碰撞造山事件,印支造山作用主要表现为扬子板块向华北板块俯冲,形成苏鲁高压-超高压变质带及同造山花岗岩及后造山高碱正长岩;燕山造山作用的大陆动力学环境起源于中亚-特提斯构造域向滨太平洋构造域转化和太平洋板块的俯冲,在胶东地区表现为3次造山和3次伸展。晚侏罗世造山早期玲珑片麻状花岗岩组合是区域构造挤压导致地壳增厚引起地壳重熔的产物,代表了大陆弧花岗岩特征;早白垩世造山中期郭家岭花岗闪长岩-花岗岩组合代表了造山期大陆弧花岗岩的特点;造山晚期伟德山闪长岩-花岗闪长岩-花岗岩组合表现为大陆弧花岗岩,后造山A型崂山晶洞过碱性碱长花岗岩-正长花岗岩组合为大陆造陆隆升花岗岩与后造山花岗岩,代表燕山构造的结束。胶东地区构造-岩浆事件和金矿成矿作用受控于特提斯、古亚洲洋和太平洋三大构造域的相互作用,金矿形成的动力学背景是中生代构造体制转折和岩石圈减薄,起因与太平洋板块向华北板块的俯冲机制有关。  相似文献   

河南渑池铝土矿成矿区地球化学背景   总被引：3，自引：0，他引：3  

王燕茹 《地质与勘探》2012,48(3):526-532

[摘 要]地球化学元素的分布特征反映了元素矿化富集规律。本文在了解矿床地质背景及地球化学性质的基础上,通过对河南渑池地区水系沉积物地球化学测量数据的统计分析,着重研究铝土矿成矿区的地球化学背景,寻找地球化学找矿指标,希望对以后的勘察工作有所借鉴。研究区的铝土矿带位于石炭系本溪组地层中,且本溪组不整合覆盖于奥陶纪地层之上。与上层地层相比,矿层富含Al₂O₃、高场强元素(HSFS),尤其是硼元素。对水系沉积物地球化学数据进行分析,得出反映元素分布形态的地球化学图,结果表明,只有B 元素可以明确反应铝土矿的空间分布位置。矿床点一般沿硼元素高值区边界分布,表明B 元素可以作为河南渑池铝土矿成矿区的地球化学找矿指标。  相似文献   

Phase equilibrium constraints on a deep crustal metamorphic field gradient: metapelitic rocks from the Ivrea Zone (NW Italy)   总被引：1，自引：0，他引：1  

C. REDLER  T. E. JOHNSON  R. W. WHITE  B. E. KUNZ 《Journal of Metamorphic Geology》2012,30(3):235-254

The metamorphic rocks of the Ivrea Zone in NW Italy preserve a deep crustal metamorphic field gradient. Application of quantitative phase equilibria methods to metapelitic rocks provides new constraints on the P–T conditions recorded in Val Strona di Omegna, Val Sesia and Val Strona di Postua. In Val Strona di Omegna, the metapelitic rocks show a structural and mineralogical change from mica‐schists with the common assemblage bi–mu–sill–pl–q–ilm ± liq at the lowest grades, through metatexitic migmatites (g–sill–bi–ksp–pl–q–ilm–liq) at intermediate grades, to complex diatexitic migmatites (g–sill–ru–bi–ksp–pl–q–ilm–liq) at the highest grades. Partial melting in the metapelitic rocks is consistent with melting via the breakdown of first muscovite then biotite. The metamorphic field gradient in Val Strona di Omegna is constrained to range from conditions of ～3.5–6.5 kbar at ≈650 °C to ～10–12 kbar at >900 °C. The peak P–T estimates, particularly for granulite facies conditions, are significantly higher than those of most earlier studies. In Val Sesia and Val Strona di Postua, cordierite‐bearing rocks record the effects of contact metamorphism associated with the intrusion of a large mafic body (the Mafic Complex). The contact metamorphism occurred at lower pressures than the regional metamorphic peak and overprints the regional metamorphic assemblages. These relationships are consistent with the intrusion of the Mafic Complex having post dated the regional metamorphism and are inconsistent with a model of magmatic underplating as the cause of granulite facies metamorphism in the region.  相似文献