摘要
为了查明柴达木盆地构造形态、煤层赋存情况、水文地质条件、主要可采煤层顶底板工程地质特征及其他有益矿产赋存情况等,对柴达木北缘地区进行煤田勘探。伽马测井时发现,该地区侏罗系煤系地层自然伽马放射性呈现高异常。针对此异常现象,对该地区地质背景、放射性异常层物性特征、沉积环境、异常成因机制等做简单分析,认为这里正在发生放射性矿物成矿作用,通过应用煤田地球物理中的测井方法,可以对该地区铀、镭等放射性元素的迁移和富集过程做简单分析研究,这对于进一步指导这类盆地的找矿及研究具有一定意义和作用。
The structural features, coal seam distribution case and hydrogeological condi- tions of the Qaidam Basin are needed to be identified, and engineering geological character- istics of the main coal seam roof and floor and occurrence of other beneficial minerals etc. are also essential to be found out. According to the research on the Northern Qaidam region when conducting gamma coal logging, natural gamma radiation of the Jurassic coal-bearing strata presents high anomaly. As for the anomaly, the geological background, property characteristics of radioactive abnormal layer, depositional environment, the genetic mecha- nism of abnormal radioactivity in this region are analyzed. The results show that radioactive minerals mineralization is happening in this region. Through the application of coal geo- physical logging, a simple analysis of the migration and enrichment of uranium, radium and other radioactive elements can be done, which can provide guidance for prospecting such basins.
出处
《工程地球物理学报》
2015年第4期549-555,共7页
Chinese Journal of Engineering Geophysics
关键词
柴达木盆地
煤田测井
放射性异常
放射性矿床
Qaidam Basin
coal geophysical logging
abnormal radioactivity
radioactive de-posits
