Character and Structural Attribute of the Beishan Ophiolite

This paper summarizes the assemblege of rock types and geochemical characteristics of four ophiolite belts in Beishan region, and analyzes the the regional geological background conditions. The result shows that the Hongliuhe-Niujuanzi-Xichangjing ophiolite belt was foamed in Early Palaeozoic and is part of the oceanic basin type and quite similar to the present oceanic ophiolite in characteristic. This ophiolite belt indicates the sutureline of the north-south plates because the Gongpoquan-dongqiyishan volcanic rocks in the north belongs to the inland volcanic rock series with active continental margin environment and the shallow sub-sea P-V-Mn-U-bearing sedinentary strata of the Cambrian in the south representing the extended tectonic before the plate becoming divergent.