التفاصيل البيبلوغرافية
| العنوان: |
中国铀地球化学块体与远景区划分. (Chinese) |
| Alternate Title: |
China’s Uranium Geochemical Blocks: Implications for Delineation of Uranium Prospective Areas. (English) |
| المؤلفون: |
徐善法, 王学求, 张必敏, 王 玮, 迟清华, 周 建, 严桃桃 |
| المصدر: |
Acta Geoscientica Sinica; Nov2020, Vol. 41 Issue 6, p785-796, 12p |
| Abstract (English): |
In this study, the authors collected geochemical data from stream sediment surveys of different scales and calculated the data based on a grid of 10 km by 10 km at the scale of 1:1 million in China. The statistic data show that geochemical background values are different in North China and South China separated by the boundary line of Qinling–Dabie mountains. Midian values of uranium in whole China, South and North China are 2.3 μg/g, 2.9 μg/g and 2.1 μg/g respectively. A total of 79 geochemical blocks with an area more than 1000 km² were delineated by a threshold value of 4.8 μg/g for South China and 3.0 μg/g for North China based on cumulative frequency of 85%. Among the 79 geochemical blocks, 33 uranium prospective areas were delineated for four types of major uranium deposits in combination with the data of uranium metallogeny and geology obtained by other researchers. [ABSTRACT FROM AUTHOR] |
| Abstract (Chinese): |
本文利用中国不同尺度水系沉积物地球化学填图数据, 以 10 km×10 km 的网格为基础, 按 1:100 万比例尺进行了数据计算。地球化学数据统计显示, 以秦岭—大别山为界, 中国南北地区铀含量值 存在明显差异。以铀含量中位数(累计频率 50%)作为背景值, 全国背景值为 2.3×10–6、南方为 2.9×10–6、 北方为 2.1×10–6。考虑南北地区铀表生风化和富集或贫化程度差异, 以累计频率 85%作为异常下限, 对应 南方地区含量值 4.8×10–6、北方地区含量值 3.0×10–6 做为地球化学异常下限, 共圈出面积大于 1000 km², 且具有明显异常浓集中心的地球化学块体共 79 处。在结合前人研究成果的基础上, 对铀地球化学块体及异 常特征、矿床分布、地质特征进行研究, 最终圈定出铀矿找矿远景区 33 处, 并以四个主要铀矿床类型分别 对 33 个远景区进行了适当的讨论。 [ABSTRACT FROM AUTHOR] |
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| قاعدة البيانات: |
Complementary Index |
