青海祁漫塔格金属矿集区矿产资源开发优化布局分析     

马亚梦  谭秀民  赵恒勤  张永兴  伊跃军 《中国地质调查》2020,7(1):85-90

青海祁漫塔格金属矿集区具有丰富的矿产资源和广阔的成矿前景,是东昆仑成矿带最重要的铁多金属成矿远景区。为推动矿集区矿产资源的开发利用和可持续发展,从矿产资源条件、技术经济条件及环境影响3个方面,通过评价指标的筛选、指标权重与评价标准的确定以及评价指标的计算等构建了资源开发布局评价指标体系,并对祁漫塔格金属矿集区进行了矿产资源开发布局评价。评价分析结果为: 祁漫塔格矿集区11个开发区划单元综合评价平均值为7.0分,矿集区整体开发优势一般; 有2个开发区划单元综合评价值在8.0分以上,属于重点优先部署开发区域,分别为夏日哈木多金属矿区和虎头崖—迎庆沟多金属矿区; 有7个开发区划单元属于可以部署开发区域,可作为备选区域; 另有2个开发区划单元综合评价值低于6.0分,暂不宜考虑开发。  相似文献   

The Response of Anomalous Vertically Integrated Moisture Flux Patterns Related to Drought and Flood in Southern China to Sea Surface Temperature Anomaly          下载免费PDF全文

董娜  徐祥德  蔡雯悦  王春竹  赵润泽  魏凤英  孙婵 《热带气象学报(英文版)》2023,29(2):179-190

With the extreme drought (flood) event in southern China from July to August in 2022 (1999) as the research object, based on the comprehensive diagnosis and composite analysis on the anomalous drought and flood years from July to August in 1961-2022, it is found that there are significant differences in the characteristics of the vertically integrated moisture flux (VIMF) anomaly circulation pattern and the VIMF convergence (VIMFC) anomaly in southern China in drought and flood years, and the VIMFC, a physical quantity, can be regarded as an indicative physical factor for the "strong signal" of drought and flood in southern China. Specifically, in drought years, the VIMF anomaly in southern China is an anticyclonic circulation pattern and the divergence characteristics of the VIMFC are prominent, while those are opposite in flood years. Based on the SST anomaly in the typical draught year of 2022 in southern China and the SST deviation distribution characteristics of abnormal draught and flood years from 1961 to 2022, five SST high impact areas (i.e., the North Pacific Ocean, Northwest Pacific Ocean, Southwest Pacific Ocean, Indian Ocean, and East Pacific Ocean) are selected via the correlation analysis of VIMFC and the global SST in the preceding months (May and June) and in the study period (July and August) in 1961-2022, and their contributions to drought and flood in southern China are quantified. Our study reveals not only the persistent anomalous variation of SST in the Pacific and the Indian Ocean but also its impact on the pattern of moisture transport. Furthermore, it can be discovered from the positive and negative phase fitting of SST that the SST composite flow field in high impact areas can exhibit two types of anomalous moisture transport structures that are opposite to each other, namely an anticyclonic (cyclonic) circulation pattern anomaly in southern China and the coastal areas of east China. These two types of opposite anomalous moisture transport structures can not only drive the formation of drought (flood) in southern China but also exert its influence on the persistent development of the extreme weather.  相似文献   

DERF2.0模式产品在河南省三夏期降水预测中的检验与订正          下载免费PDF全文

竹磊磊  杨婷  贺哲  等. 《气象与环境科学》2023,46(3):18-25

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