ObjectivernThe Beishan area,located on the south margin of the Central Asian orogenic belt,includes four main ophiolitebearing belts.From north to south,these are the Hongshishan ophiolitic belt,the Jijitaizi-Xiaohuangshan ophiolitic belt,the Hongliuhe-Xichangjing ophiolitic belt,and the Huitongshan ophiolitic belt (Fig.la).To date,only two ophiolites have been identified in the JijitaiziXiaohuangshan ophiolitic belt.