摘要
通过认真研究中国新疆某盆地410,411和412三个已知地浸砂岩型铀矿床的航磁资料,发现这些矿床上方均存在航磁微磁异常。根据地浸砂岩型铀矿的成矿地球化学机制,对航磁微磁异常的形成机理作了进一步探讨,结合试验区的实际预测成果指出,与氧化—还原过渡带有关的地浸砂岩型铀矿床上方存在微磁异常,高精度航磁完全能探测得到它。航磁微磁异常是此类矿床的特征异常之一,对此类铀矿床具有直接的指示意义,可以作为一种直接标志信息运用于前期成矿预测。
Anomaly appearing rather weak or none is found in the thick cover of insitu leachable sandstone type uranium deposit. Among the existing methods of geophysical and geochemical exploration, none can be used for searching directly and effectively for this type of deposit. Thus, prospecting is extremely difficult. After serious study of aeromagnetic data of three known deposits of this type No. 410, 411 and 412, southern rim of Yili Basin, this paper discovers that there are microaeromagnetic anomalies over these deposits. It further discusses mechanism of formation of microaeromagnetic anomaly based on metallogenetic geochemical mechanism of this type of uranium deposit. In the light of the practical prediction productions, it concludes that there are micromagnetic anomalies over insitu leachable sandstone type uranium deposits related to redox transitional zone and high precise micromagnetic survey can detect perfectly these anomalies. As microaeromagnetic anomaly is one of characteristic anomalies of this deposit and has direct indicating significance,it can act as a kind of direct guiding information in the prephase metallogenetic prediction.
出处
《地质科技情报》
CAS
CSCD
北大核心
2003年第3期49-54,共6页
Geological Science and Technology Information
基金
核工业总公司科研项目
