The Nangqian felsic intrusions were differentiated from parental shoshonitic melts, different from the Yulong porphyries.

The parent magmas originated from a metasomatized lithospheric mantle during continental subduction.

The differences in sources and depths of partial melting may explain the difference in the extent of Cu–Au mineralization.

The study should be the first discussion of different petrogenesis between the barren and ore-bearing rocks in eastern Tibet.