共查询到19条相似文献，搜索用时 312 毫秒
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概况 哈萨克斯坦幅员辽阔,分布着各种各样地质成因独特的矿床,其天然铀的储量B类和C1类约为50万吨,约占世界铀总储量的25%,居世界前列.可地浸砂岩铀矿可靠储量和估计附加资源-1的总量,加上潜在的资源量总数接近百万吨,已成为目前世界上可地浸砂岩铀矿的第一国. 相似文献
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Guo Ruiqing 《地球科学与环境学报》1997,(1)
矿床在空间的分布是不均匀的，它受到区域地质构造的控制，又受到大量随机因素的影响，具有一定的统计规律．研究这种统计规律，就可以进行预测。本文尝试用“单元矿床值概率分布法”预测铁矿资源。 相似文献
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刘淑文 《地球科学与环境学报》2002,24(4):6-8
资源潜力主要来自于新的矿床(点)的发现和已知矿床(点)的增储。在研究内蒙古大兴安岭南段阎王鼻子成矿段矿床(点)空间分布模型基础上,确定其不具有发现新矿点的潜力,资源潜力应来自于已知的矿床(点)的增储,并采用定量特征分析方法对矿产资源进行了综合信息预测。 相似文献
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概况 哈萨克斯坦幅员辽阔，分布着各种各样地质成因独特的矿床，其天然铀的储量Ｂ类和三类约为５０万吨，约占世界铀总储量的２５％，居世界前列。可地浸砂岩铀矿可靠储量和估计附加资源－１的总量，加上潜在的资源量总数接近百万吨，已成为目前世界上可地浸砂岩铀矿的第一国。 哈萨克斯坦境内所发现的上百个铀矿床多集中在５个铀矿省，其中３个铀矿省（楚－萨雷苏铀矿省、锡尔达林铀矿省和伊犁铀矿省）以外生铀矿床（点）为主；另两个铀矿省（肯斗克斯－楚伊犁－别特巴克这拉成矿省、北哈萨克斯坦铀矿省）以内生（热液的）铀矿床（点）为主… 相似文献
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介绍了江口式铁矿矿床特征及沉积岩相古地理特点，铁、锰、磷等矿产的沉积成矿序列，认为该类铁矿属条带状铁硅质建造，与前寒武纪苏必利尔湖型铁矿有一定相似性。矿床分布范围广，资源潜力大，建议加强勘查开发。 相似文献
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胶东“玲珑-焦家式”金矿资源潜力与找矿 总被引：1，自引：1，他引：0
“玲珑焦家式”金矿的成岩成矿,从新太古代至中生代存在着继承性的成因关系,成矿具有长期性、多源性特点,但中生代燕山早期岩浆活动是主导成矿因素。区域化探成果显示胶东金矿直接矿源岩———郭家岭花岗岩金的丰度比原始矿源岩———早前寒武纪变质沉积岩系及侵入岩系金的丰度低1/2。郭家岭花岗岩面积在2 km2以上岩体定量估计金亏损总量与胶东金矿总量预测的资源量相当,从一个侧面展现了胶东金矿资源的潜力。望儿山金矿的找矿实践展示,焦家式金矿在1 000 m以下尚有巨大潜力,整个胶东金矿产区在3 000 m以上的资源潜力应在5000 t以上。 相似文献
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能源植物开发利用是应对能源问题和全球变化的有效途径之一,准确的资源潜力及时空分布信息是资源规划和相关科学研究的重要基础。本文提出了耦合地理信息系统（GIS）空间分析与生命周期分析（LCA）进行能源植物开发利用潜力评估的技术方法,以黄连木为例进行研究。基于土地利用数据、遥感数据、气象数据、土壤数据,以及黄连木的生态习性,采用多因子综合评价方法,建立了1km空间栅格数据的黄连木种植适宜性综合评价模型,获取了适宜于黄连木规模化种植的土地资源与空间分布;另外,采用LCA方法对黄连木开发利用主要环节的温室气体排放进行了定量估算。结果表明,我国可用于发展黄连木的边际土地总量为1989.76万hm2,其中,适宜黄连木生长的土地面积为710.32万hm2,较适宜黄连木生长的土地面积为1279.44万hm2,总温室气体减排潜力为2544.46万t。同时,较之于传统的区域总体统计值的结果,空间栅格的评估方法可为科学决策提供更为精细的数据支撑。 相似文献
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对山东半岛海岸带南段主要富水地段地下水资源潜力进行了分析,采用地下水资源潜力系数公式计算分析各地段的开采程度,判定其开采潜力。区内9个富水地段平均潜力系数1.43,地下水开采潜力大。但为了保证水源地的供水安全,提出了相应的保护对策。 相似文献
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土地利用动态变化的空间测算模型研究 总被引：8，自引：0，他引：8
本文以GIS叠置分析为辅助手段,将研究区域(广州市海珠区)的土地细分出未变化部分、转移部分和新增部分等三种空间类型,并据此对现有测算土地利用变化速率的数量分析和动态度模型进行了评析,提出了修正后的空间信息测算分析模型,旨在更为精细和准确地测算各土地利用类型的动态变化程度。或者更具体地说这种模型最主要是从微观角度的空间区位上认识不同用地类型变化的面积和速度(增加或减少)的情况,并且要清楚知道变化的用地在空间的分布和时空规律。结合社会经济情况来探讨这种情况发生的原因及其可能产生的结果。该研究对沿海发达地区未来城市土地利用的合理规划有一定的借鉴意义。 相似文献
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lareODUcrI0NThephenomenonofbreakingwavesintheoasnoocurswheneveramomentahiyhighcrestmecheSanunstablecondition.It0ccursintendtimhy,andtheoccurrencefre-qUencydePendsonthescastate.ManystudAshaddricaniedoutontheoccurmcefre-qUencyofbrmkingwavesindeepweter.0chiandTsai(l983),LongueHiggins(l975)andVanD0mandPamn(l975)nadstheptalictonofbrmkingwavesoccurrenceindeePwater,usingabaskingcriterionforindividualwavesbasedonthewavesmpness.ThecriterioncanbeexpmeedintennSofthewaVehdghtHandperiodTasH>PgT'(… 相似文献
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A households′production behavior directly influences the quality of the environment and determines the successful development of nature reserves.Meanwhile,the households′production behaviors are complicated by interrelated factors,such as protection attitudes,resource endowment,and family wealth.This research evaluated households near the Crested Ibis National Nature Reserve in Shaanxi Province,acquiring data from 436 households around Yang County and Ningshan County in the south slope of Qinling Mountains,China.Based on the collected data,we developed a structural equation model to evaluate the coupling relationships among households′ protection attitudes,production behaviors,resource endowment,and family wealth.The results showed that:1) households with great resource endowment had more negative attitudes,probably due to their greater protection costs;2) the households with higher education levels had worse protection attitudes;3) the households with more family wealth were likely to use fewer fertilizers,pesticides,and firewood;4) the households with more resource endowment showed less production and management behaviors;5) the enhancement of households’ attitudes improved production behaviors to protection the environment,but the effects were not statistically significant.Our results provide a basis for the government’s protection policy making,exploring the effective management measures that are beneficial for both nature reserve management and community development. 相似文献
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根据郑州市东北郊不同污水灌区、不同深度的土壤采样分析结果,计算了重金属元素在土壤中的概率分布类型及环境背景值,论述了重金属元素对土壤的污染特点及其对农作物生长的影响,并指出了汞污染土壤的普遍性和对粮食及蔬菜质量所造成的危害。 相似文献
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CHEN Yong-liang WU Wei LI Xue-bin Mineral Resource Prediction Institute of Comprehensive Information Jilin University Changchun Jilin China Northeastern Geography Agricultural Ecology Institute of Chinese Academy of Sciences Changchun Jilin China Design Research Institute of Urban Rural Planning of Changchun Changchun Jilin China 《东北亚地学研究》2005,(Z1)
The Dempster-Shafer theory has been successfully applied to mineral resource potential mapping in G1S environmental. In this applied form, basic probability assignment and combined basic probability assignment are applied to measuring map pattern and map pattern combination, respectively; and the environment composed of the only two singleton sets (deposit set and non-deposit set), is used for expressing the entire map area. For a subarea in which the certain map pattern combination exists, the combined basic probability assignment corresponding to the map pattern combination existing in this subarea, expresses the belief of inferring the subarea belonging to the deposit set from the evidence that the corresponding map pattern combination existing in the subarea. Thus, it may be served as a statistical index measuring the relative mineral resource potentials of the subarea. And it may be determined like 1) dividing the map area into a series of small equal-sized grid cells and then select the training sample set composed of the well-known grid cells or the entire grid cells; 2) estimating the basic probability assignments corresponding to each map pattern from the training sample set; 3) determining the map pattern combination existing in each cell, and then appling the Dempster's Rule of Combination to integrating the all basic probability assignments corresponding to the map patterns existing in the cell into the combined basic probability assignment. Mineral resource potential mapping with the Dempster-Shafer theory is demonstrated on a case study to select mineral resource targets. The experimental results manifest that the model can be compared with the weights of evidence model in the effectiveness of mineral resource target selection. 相似文献