1. College of Earth Sciences，Jilin University，Changchun 130061，China;

 Many ophiolites are exposed in the Sabah，Malaysia，represented by the KET and Chert － Spilite( Cs) formations． This paper takes the sandstone of Cs Formation in Sabah as the research object and analyzes the U － Pb dating of detrital zircon． The age spectrum of zircons of KDS － Cs － 1 can be divided into four groups: 190～ 68 Ma ( 22%) ，279 ～ 213 Ma ( 18%) ，627 ～ 315 Ma ( 22%) and 2 788 ～ 976 Ma ( 37%) ，with the age peaks at 117 Ma，234 Ma，415 Ma and 1 877 Ma，respectively． The age spectrum of zircons of BLＲ － Cs － 1 can be divided into four groups: 196 ～ 90 Ma ( 20%) ，350 ～ 212 Ma ( 19%) ，770 ～ 404 Ma ( 12%) and 423 ～ 873 Ma( 48%) ，with the age peaks at 104 Ma，249 Ma，509 Ma and 1 848 Ma，respectively． The age map of detrital zircons