The middle and lower rearches of the Yangtze River serve as an important iron copper base area of China.The auriferous skarn deposits and copper (associated with gold) skarn deposits discovered in the past ten years are also mainly distributed in the middle and lower reached of the Yangtze River.Based on an integrated correlation and study of regional and deep geophysical data such as 12 magnetotelluric sounding profiles,5 seismic profiles,tomographic imaging velocity structural data and gravity and magnetic field,the authors have formulated the 3Ddeep tectonic framework of the middle and lower Yangtze valley and its neighborring areas in relation to the distribution of auriferous skarn deposits and copper (associated with gold) skarn deposits.The authors hold that the joint actions of numerous factors such as the upper mantle uplifted zone (the mantle thinned zone of lithosphere),the upper mantle anomalous area (relatively low velocity area),the uplifted zone of intracrustal high conductivity layer,the deep fault (shear zone of lithosphere),the margin of the crust upper mantle uneven masses,the basement uplifted area reflected by gravity high,the magmatic belt and tectonic intersection reflected by skipped magnetic field,control the distribution of auriferous skarn deposits and copper (associated with gold) skarn deposits.