Mineralized feature, tectonic setting and metallogenic type of Tongyugou cupper deposit, Qinghai province

Tongyugou cupper deposit located at the Triassic sedimentary basin of Hainai (to the South of Qinghai Lake) occures in a olistostrome felt with E-W orientation and in the transitional position from marene sedimentary series to volcanic-sedimentary series, which is characterized by typical dedded or ebodies and association with wrigglites and silicon-rich sedimentary rocks.On the basis of the sedimentary formation, sedimentary facies of ore-bearing series and the nature of the volcanic rocks, the tectonic setting of the deposit is considered to be spreading-subsidence basin existting in continental margin.The contrast to different stratiform sulfide deposits indicate Tongyugou depositis between Sedex type and Besshi type but closer to the latter.