摘要
Based on the study of the geochemical characteristics response of different scales of gold element data from 1∶200 000 geochemical survey in the middle-lower reaches of the Yangtze River, the authors hold that there exists a giant geochemical province in the middle-lower reaches of the Yangtze River, which has continuously provided ore sources for the middle and lower Yangtze River areas. The feasibility of applying the low-density geochemical method to China or the whole world is also discussed in this paper.