Geology and prospects of the Bamaoshan and Niutoushan copper deposits in Zongyang, Anhui

The Bamaoshan and Niutoushan copper deposits in Zongyang, Anhui are hosted in the Mesozoic igneous rock series, which are built up of a complete sequence of intrusive rocks, subvolcanic rocks and volcanic rocks. The copper deposits may be grouped into two types:the volcanic-exhalative-sedimentary copper deposit and porphyry copper deposit. The volcanic-exhalative, hot spring and volcanic hydrothermal sediments were accumulated at the bottom of lakes during the early mineralization. The intrusion of subvolcanic rocks and long-term hydrothermal activity led to formation of the porphyry-related copper deposits in the extensional-dominated accommodation spaces.