摘要
The relationship between the processes of superimposed orogenesis and gold mineralization has been discussed in terms of the studies of tectonic setting, evolution of ore-controlling structures, timing and sequence of gold mineralization. The results show that there were three tectonic-thermal events related to gold mineralization. The early gold mineralization, occurred from 61.55 Ma to 63.09 Ma, corresponds the peak period of the thrust system and generation of strike-slip fault, indicates they were mainly controlled by the strongly early convergence geodynamic regime of India-Euraisa conllision. The main gold mineralization, occurred from 33.76 Ma to 36.10 Ma, which related to the relaxation of regional compressive stress field and corresponding to the generation of alkali-rich porphyry and booming of strike-slip faults, reveals that they were mainly controlled by the transition of geodynamic regime of India-Euraisa collision, and eastward escapation of the Tibetan Plateau, and pulsating uplift of asthenosphere. The late gold mineralization, occurred from 26.40 Ma to 30.80 Ma, corresponds the extension of lithosphere and the intrusion of high-K plutons which came from the depleted mantle and formed during the decompression period in internal plate, were mainly controlled by the oblique reverse rotation and rollback subduction of India Plate.