宁南县水利建设的改善

1989年底全县有库塘堰等水利工程1310处,灌溉农田10.5万亩,其占耕地面积的61.8％。针对存在问题,提出以整修、改造、配套、挖潜为重点的水利建设方针,全县开展了1989年冬修农村水利。据1990年春统计,新修、整修水利工程1126处,完成土石方189万立方米,投资377万元,灌溉面积:新增3400亩,改善4.0万亩。这次冬修水利中,领导认真负责,抓了施工技术管理和安全措施,建立了水利建设基金和劳动积累工制度,严肃了财务制度,推广了节水型工程,从而使本县的水利建设得到了改善。     

藤县钛铁矿资源开发面临的若干问题与对策

文章根据藤县钛铁矿开发利用情况，分析了当前该县钛铁矿开发利用面临的几个问题，探讨了在市场经济体制转换的新形势下进一步抓好开发利用的措施与对策     

高州市低山丘陵区土地资源的可持续利用

分析了高州市低山丘陵区在土地资源开发利用过程中存在的问题及其主要原因。提出了高州市低山丘陵区土地资源可持续利用的对策 ,包括控制人口数量 ,提高人口素质 ;加强基本农田保护 ,提高耕地质量 ;加强规划、指导 ,走生态开发的路子     

鲁山县水土流失形成机制及防治对策

鲁山县自然条件复杂，地质灾害种类较多，水土流失是其主要的一种。本文在阐明水土流失概况、形成机制的基础上，进行了趋势性预测和提出了防治对策。     

宁南县可再生能源资源合理开发

长期以来,宁南县生活用能源以薪柴为主,生产用能源不能自给,能源供需矛盾突出。1986—1989年,对县内多种可再生能源资源加以合理开发利用,并应用节能技术,推广薪炭林造林技术,建立示范能源村等,缓解了本县的能源供需矛盾,改善了山区生态环境,促进了山区经济发展。     

宜昌县开拓农业企业的初步尝试

本文以宜昌县的实践为依据,论述了农业企业在振兴山区经济中的特殊地位和作用,并总结出“按规模经营组织山地开发,按农业企业特点实施管理,按商品生产需求搞好服务”的山地开发经验;指明兴办农业企业是一条振兴山区经济的成功之路。     

SPATIALIZATION MODEL OF POPULATION BASED ON DATASET OF LAND USE AND LAND COVER CHANGE IN CHINA

The spatialization of population of counties in China is significant.Fistly,we can gain the estimated val-ues of population density adaptive to different kinds of regions.Secondly,we can integrate effectively population data with other data including natural resources,environment,society and economy,build 1km GRIDs of natural resources re-serves per person,population density and other economic and environmental data,which are necessary to the national manage-ment and macro adjustment and control of natural resources and dynamic monitoring of population.In order to establish population information system serving national decision-making,three steps ought to be followed:1)establishing complete geographical spatial data foundation infrastructure including the establishment of electric map of residence with high resolu-tion using topographical map with large scale and high resolution satellite remote sensing data,the determination of at-tribute information of housing and office buildings,and creating complete set of attribute database and rapid data update-ing;2) establishing complete census systems including improving the transformation efficiency from census data to digital database and strengthening the link of census database and geographical spatial database,meanwhile,the government should attach great importance to the establishment and integration o population migration database;3)considering there is no GIS software specially seving the analysis and management of population data,a practical approach is to add spe-cial modules to present software system,which works as a bring actualizing the digitization and spatialization of popula-tion geography research.     

Zinccopperite-A New Variety of Zinc-CopperIntermetallic Compounds Discovered in aPorphyry-Copper Deposit

Zinccopperite (tentatively named) is a rare native alloy mineral discovered in quartz monzonite-porphyry in the Xifanping area, Yanyuan County, Sichuan Province. It is a new variety of zinc-copper alloy mineral found for the first time in the porphyry-copper deposit in China. Its intergrown minerals are K-feldspar (mainly perthite), albite-oligoclase, quartz and biotite; and the associated minerals include pyrite and chalcopyrite. It is characterized by a golden reflection colour, being isotropic (isometric), with the grain size ranging from 10 to 50 μm, microhardness VHN10= 190 kg/mm2, and reflectance RVis= 67.97%. Electron microprobe (Model JXA-733) analysis shows Cu = 59.15%-62.55% and Zn= 36.32%-39.85%. The crystallochemical formula is Cu6.27-7.0Zn4.0, simplified as Cu7Zn4.     

福建周宁芹溪银矿床成矿模式的探讨

福建周宁芹溪银矿床处于区域上有利的成矿部位。经过地质找矿普查发现６号主矿化蚀变脉地表有规模较大、矿化较强的银矿（化）体出露,但认为其倾向和与其相随的流纹斑岩脉相反,钻孔揭示证明,其深部矿化规模小、强度弱、矿体产状与地表差距较大。在１６号主矿化蚀变脉中发现有含矿隐爆角砾岩脉出露。经过综合研究认为：６号主矿化蚀变脉倾向应为与其相随的流纹斑岩脉相同,隐爆角砾岩的成因与流纹斑岩脉的侵入有关。并总结了矿床的     

福建沙县大佑山火山喷发盆地基本特征

沙县大佑山火山构造是一较典型的火山喷发盆地,面积约150km2。盆地内的火山地层属石帽山群,岩石组合具双峰式火山岩特点。上部流纹岩全岩Rb－Sr等时线年龄为99±3Ma,其形成时代为早白垩世。火山岩相发育较齐全,以爆发相占绝对优势,其空间分布具有一定的规律性。火山构造以西部的大佑山破火山机构较为特征,重点阐述该破火山的地貌特征、火山断裂特点、火山岩相展布及其与火山口的关系,恢复火山喷发盆地形成的历史。