According to the field investigation, petrographic examination, petrochemical and geochemical analyses, and a few isotopic age determinations, the features of the Zulaishan complex are very similar to those of the Taishan Complex. The Zulaislian Complex, like the Taishan Complex, can be subdivided into diorite and granite groups which have intruded into the basement of the Taishan Group, The diorite group is composed of finegrained one and medium-coarse grained one; the former corresponds to Puzhaosi diorit...