Abstract: The Heshang area of Hangzhou region in northwest Zhejiang is a typical place where the Upper Proterozoic volcanic rocks of Shangshu Formation outcrop. In this area, there is also observed the occurrence of Neoproterozoic diabase and hypabyssal, composite intrusive rocks of alkalic feldspar granite. The volcanic rocks and intrusive rocks have close spatial association and close age. They are both products of tectono-magmatic activities in Late Jinning period. The magma eruption and intrusion could be divided into two stages. The rocks formed in each particular stage have similar or identical characteristics in their rock types, petrochemistry and geochemistry. These features indicate that the volcanic and intrusive rocks in each stage have the same magma origin. The basic volcanics in Shangshu Formation and Ciwu diabase, formed in the first stage, were derived from the less-depleted mantle or the magma with the origin of depleted mantle contaminated by continental crust. The acid volcanics in Shangshu Formation and Daolinshan alkalic feldspar granite, formed in the second stage, might be derived from partial melting of crust sources consisting of both basic and acid constituents.