Abstract:

This paper aims to introduce the strange ophiolite mélange of the Huoshishan area of Beishan Mountains.The authors discovered the ophiolite mélange in the fieldwork in 2006,which are composed of exotic blocks and schiefers such as serpentinization peridotite schiefers,pyroxenite schiefers,basalt schiefers,siliceous-rocks and matrix.The matrix is located in Gongpoquan Group,which is made up of lots of metamorphic tuffaceous sandstones,little andesite and carbonate.Most of exotic blocks and matrix have metamorphosed.The Huoshishan ophiolite mélange occurs between the Hongliuhe and Niujuanzi ophiolite mélange,and the petrochemical and geochemical characteristics are similar to that of Honliuhe.Consequently,this research indicates that Huoshishan ophiolite mélange perhaps belong to Hongliuhe-Niujuanzi ophiolite mélange belt.The discovery of ophiolite mélange is important for study of the Paleozoic tectonic background of Beishan area.

Key words: Hongliuhe-Niujuanzi, Huoshishan, ophiolite mélange, Beishan