中文摘要：

根据区域化探数据预测地空界面天然放射性水平的基本原理和成都经济区1∶25万土壤化探数据中铀、钍、钾的含量数据,首次对成都经济区的天然放射性地质环境进行了研究和评价。结果表明成都经济区的地质构造和地表出露岩层与研究区的放射性环境有较大关系。在研究区的大部分范围内,^40K比活度高于全国和世界的平均值,^238U的比活度远低于全国和世界的平均值,232^Th的比活度与全国平均值相当,但明显高于世界平均值。除龙门山褶皱带和峨眉山—瓦山断褶带的小部分地区外,成都经济区的各项辐射评价参数均在国家建筑材料放射性核素限量标准控制式的范围之内。该文可为合理、有效的利用成都经济区的国土资源提供支持,也可对加速成都经济区经济一体化和城市的可持续发展提供必要的参考。

英文摘要：

Using geochemical prospecting data obtained in previous geological investigation and Soil U, Th and K content data obtained from 1： 250 000 geochemical exploration in Chengdu Economic Area, this paper predicted the natural radioactivity on the ground-air interface. The results show that the specific activity of the radioactive nuclide ^40K is higher than its average values of China and the world, ^238U is much lower than its average values of China and the world, and ^232Th is equivalent to its average value of China but much higher than its average value of the world. Except for small areas in Longmenshan folded belt and Emeishan-Washan faulted fold belt, the radiation level of Chengdu Economic Area is within the national limits of radioactive nuclides in building materials. This paper provides support for the reasonable and effective use of land and resources in Chengdu Economic Area and also supplies the necessary reference for speeding up economic integration and sustainable development of cities.