In eastern China, most of the copper skarn deposits occur in folded troughs which are controlled by the EW-trending
faulted fold systems (the Pal-Asian geotectonic domain), and the NNE-trending rift or fault zones (the Marginal-Pacific
geotectonic domain), particularly the later. From the north to the south, there are four troughs hosting the main copper
skarn deposits in eastern China: the Yanliao Trough, the Yangzi River Trough, The Qiantang-Yuanshui Trough and the
Zichen Trough. There are more than 30 copper skarn deposits in eastern China, and ore reserves of each deposit are
between 30 to 100 Mt with average grades over 1 % Cu.