An Evaluation of Natural Radiation Environmental Geology of Chengdu Economic Area, Sichuan Province
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.