"自然跳跃式"开发战略与西部大开发--以攀枝花市为例     

李祥妹  刘键  刘刚才 《地理与地理信息科学》2004,20(1):78-81

该文在系统分析攀枝花市环境、资源、交通条件、经济状况的基础上,总结了攀枝花市的发展历史、开发经验,探索了较为落后地区的发展途径和开发模式,指出在较为落后的地区开发中应优先选择发展极点,充分发挥发展极的带动、辐射和扩散作用,促进区域整体的发展。提出我国西部开发宜先采取“自然跳跃式”开发战略的观点。  相似文献   

TerraSAR在区域地质调查中的应用方法     

张瑞江 《世界地质》2010,29(4):640-645

经3 m空间分辨率TerraSAR图像在四川攀枝花地区1∶50 000区域地质调查中的应用,提出了一套基于TerraSAR图像的应用影纹-结构影像单元进行区域地质填图的基本方法。介绍了TerraSAR图像的解译分区、解译标志的建立方法、地质体影像单元的划分及三大岩类和构造的解译方法。根据研究结果,提出不将TerraSAR图像作为区域地质调查的首选数据源的建议。  相似文献   

Heterogeneous transition dynamic equations and the self-organized origin of the nesting rhythmic beddings in Panzhihua lithosomes     

WU Jingping  LI Caiwei  BAO Zhengyu  YANG Wenhua  ZHOU Chenggang  SANG Zunan  LI Fanglin & QU Songsheng College of Chemistry  Molecular  Wuhan University  Wuhan  China  Faculty of Material Science  Chemical Engineering  China University of Geosciences  Wuhan  China  Information Department  Zhongshan University  Guangzhou  China  Faculty of Earth Science  China University of Geosciences  Wuhan  China 《中国科学D辑(英文版)》2005,48(1):13-20

Dynamic equations were developed for heterogeneous phase-transition in a system of coupled nucleation, growth and ripening. Based on these equations, a self-organized origin of small-scale nesting rhythmic beddings in Pahzhihua lithosomes was investigated and the results showed that the beddings could be formed by the cross supersaturated nucleation-crystallization of augite and feldspar successively. This process could be implemented by coupling with supersaturated nucleation, Ostwald ripening, component diffusion and the primary grain diffusion under a proper temperature gradient. The slightly intensive supersaturated nucleation and Ostwald ripening occurring in Panzhihua lithosomes may relate closely to the mineral components such as V-Ti-Maanetite.  相似文献   

Geochemical Baseline and Trace Metal Pollution of Soil in Panzhihua Mining Area   总被引：9，自引：0，他引：9  

滕彦国  倪师军  庹先国  张成江  马玉孝 《中国地球化学学报》2002,21(3):274-281

A total of 31 topsoil samples were systematically collected from the Panzhihuaminingarea including steel smelting,coal mining ,urban and rural districts.A normalization procedure was adopted to establish the environmental geochemical baseline models for this area.By using the above baseline models,the regional geochemical baseline values of As,Cr,Cu,Ni,Pb and Zn were determined.On the basis of the baselines,the enrichment factors were used to analyze the mechanism of trace metal pollution in topsoil from anthropogenic sources,and the results showed that the serious trace metal pollution is caused by human activities in coal mine,iron mine,smelting factory,tailing dam and other industrial districts in the Panzhihua area.  相似文献   

四川攀枝花含矿辉长岩地球化学及成矿意义     

胡孝清  郗爱华  向雷  谢官志  肖嗣禹  孙鸿儒  石桂鹏 《世界地质》2016,35(2):395-402

选择四川攀枝花含矿辉长岩和不含矿玄武岩进行岩石学和岩石地球化学对比研究。结果表明,含矿辉长岩属于过铝质钙碱性岩,富Ti;玄武岩属于偏铝质钙碱性岩,高Mg、低Ti。微量、稀土元素差别明显,含矿辉长岩稀土总量低,表现为Eu正异常、轻重稀土分馏一般;不含矿玄武岩稀土总量高,表现为Eu元素轻微的正异常、轻重稀土分馏明显。与原始地幔相比,玄武岩不相容微量元素含量较高,特别是Rb、Ba、Th、Nb、La、Ce、Sr等强不相容元素富集多达50~100倍。结合前人研究成果,查明攀枝花含矿辉长岩与二滩玄武岩可能源于富集地幔不同程度的部分熔融,且在后期演化过程中不同程度地混染了壳源物质。笔者认为,岩浆的结晶分异作用、壳源物质的混染和挥发性组分的保留,可能是侵入体能够形成钒钛磁铁矿床的主要控制因素。  相似文献   

四川攀枝花小河流域地质灾害发育分布规律浅析     

李石桥  许俊豪  刘磊  曹亚廷  刘多林  计扬  叶小林  马启科 《地质灾害与环境保护》2016,(3):45-48

小河流域地处四川省攀枝花仁和区境内,地势南高北低,山脉走向近南北,岭谷相间。总体为中-大起伏中山地貌,较复杂的地形为滑坡、崩塌、泥石流的发生提供了空间,流域内地质灾害的发生一定程度影响了当地经济的发展。本文通过对区内23处地质灾害点的分析,讨论了流域地质灾害的主控因素及发育、分布规律,为科学合理地评价预测地质灾害的发展趋势与可能造成的危害提供参考资料。  相似文献   

攀枝花层状辉长质岩体的微量元素和锶钕铅氧同位素系统:地幔源区和矿床成因的证据   总被引：8，自引：0，他引：8  

艾羽  张招崇  王福生  郝艳丽  赵莉  杨铁铮 《地质学报》2006,80(7):995-1004

攀枝花岩体是攀西地区一个典型含钒钛磁铁矿的层状辉长质岩体,是峨眉山大火成岩省的组成部分。其Sr、Nd、Pb同位素组成变化范围较窄,落在峨眉山玄武岩的范围内,同时也落在洋岛玄武岩范围内,说明攀枝花岩体与峨眉山玄武岩有着成因联系,均与地幔柱作用有关。其低的δ18O值(<6‰)说明没有地壳物质的混染,其高的La/Nb比值(>1)和微量元素原始地幔标准化图解出现的负Nb异常则表明源区有岩石圈地幔物质的混染。因而攀枝花岩体是地幔柱和岩石圈地幔部分熔融的产物,岩浆在岩浆房中没有经历地壳物质的混染作用。Mg#与P2O5的正相关以及P2O5与FeO含量的负相关,表明P不是导致氧化物熔体不混熔的主要原因;而Mg#与Fe2O3/FeO的负相关则说明,岩浆演化过程中氧逸度的升高可能是导致氧化物熔体不混熔的主要原因。  相似文献   

攀枝花市矿山地质环境现状及保护对策   总被引：3，自引：0，他引：3  

李玉昌 《四川地质学报》2000,20(2):125-129

介绍了攀枝花市矿山地质环境的两头和近年水地质环境保护采取的措施,针对实际提出了对策和建议。  相似文献   

攀枝花古地幔柱壳、幔结构与地球物理边界场特征   总被引：1，自引：0，他引：1       下载免费PDF全文

滕吉文  宋鹏汉  董兴朋  刘有山  马学英  闫雅芬 《地球物理学报》2019,62(9):3296-3320

攀枝花古地幔柱的形成与演化对这一地域的大地构造格局、金属矿产的聚集和区域大陆动力学研究均有着极为重要的科学意义和应用价值.本文通过穿越攀枝花古地幔柱中心部位的四条人工源深部地震探测剖面和区域地球物理边界场响应研究提出：（1）攀枝花古地幔柱具有特异的壳、幔速度结构;（2）在其中心部位由结晶基底到壳、幔边界均为高速体,且结晶基底和Moho界面局部隆起、地壳内部存在厚达10余千米的低速层,且被数条深、大断裂切割;（3）重力场、磁力场的边界异常场响应组构了攀枝花古地幔柱的地表形态和中心部位的圈闭范围.  相似文献   

Crystal Growth and Crystallization Time Scales of the Panzhihua Layered Intrusion: Constraint from Crystal Size Distribution     

LI Xuejun  LUO Zhaohu  LI Xiaowei  WANG Yu  YANG Zongfeng  LI Jie  LIU Xiao 《《地质学报》英文版》2020,94(5):1428-1439

The Panzhihua layered intrusions is generated closely related to the Emeishan LIPs. This paper analyzes the spatial distribution of plagioclase and pyroxene. The quantitative texture analysis of 2209 plagioclase shows that the characteristic length of plagioclase is 0.54 to 0.96 mm, the intercept variation range is large, from ?0.67 to 0.96, and the slope is ?1.85 to ?1.04, the Aspect Ratio shows from 1.84 to 2.59 and fractal dimension D is 1.908–1.933. The quantitative texture analysis of 2342 pyroxene shows that the characteristic length of pyroxene is 0.38–0.64 mm, the intercept shows from 0.46 to 2.26, The slope ranges from ?2.6 to ?1.47, the Aspect Ratio value varies from 1.53 to 1.71, the fractal dimension D is 0.93 to 1.13. All the CSDs results of the Panzhihua intrusions indicate that plagioclase and pyroxene form in an open magma system and undergo four replenishment of magma injection. The plagioclase crystals do not grow as the lathlike shape, and the fractal growth leads to complex crystal surface. The plagioclase undergoes deformation compaction during the crystal process, and then is oriented. The pyroxene crystals grow along an approximately triaxial ratio and undergo texture adjustment and small crystal dissolution reabsorption. When all crystals in magma system grows up to 2 mm, the pyroxene undergoes cumulation in the Panzhihua layered intrusions. The plagioclase crystallization time scale is 171.23–304.41 years, representing that the crystallization is the more uniform in central part of the melt. The nucleation density continuously increases during the crystallization process of the magma system. The time scale to reach the final maximum crystal nucleation density is 15.28–58.98 years.  相似文献