摘要
采用热释光光子计数的方法初步研究了鄂尔多斯盆地和安徽淮南煤田两种复杂地质背景中的热释光现象。研究结果表明 :(1)深度小于 10 0 0m的浅表地层岩石标本的天然热释光量没有显著的异常 ,可以认为是晚第四纪以来的自然放射性效应的累加 ;(2 )在深度 2 0 0 0m以上的地层 ,钻孔岩石标本的天然热释光统计显著呈现弱化趋势 ,甚至在 4 0 0 0m深度的岩石已经不具备生长热释光的条件 ;(3)岩性为石英砂岩的钻孔标本的天然热释光峰温的位置普遍移向高温方向 。
Thermoluminescent phenomenon resulting from two kinds of complicated geological situation, Ordos Basin and Huainan deposits in Anhui Province, is studied by the means of thermoluminscence counting method. It is shown that: (1) there are no apparent abnormalities of natural TL detected from the rock samples selected in the first 1000 meter depth of the Earth, and these natural TL are accumulated through natural radiation effects; (2) the natural TL shows statistically obvious reducing trends for the rock samples selected under the 2000 meter depth, and even no detectable TL is found for those rocks selected at 4000 meter depth. (3) the natural TL peaks corresponding to high temperature generally shift to the direction of higher temperature for the quartz-related rock samples, and several thermal events which occurred during the geological times might be responsible for this case.
出处
《核技术》
CAS
CSCD
北大核心
2003年第1期68-71,共4页
Nuclear Techniques
基金
国家自然科学基金 (4 9772 170 )
中国科学院院长基金资助
