Yanqiang Ling ophiolitic remnants has been discovered in Duolong ore concentration area, Gêrzê County, Tibet

The Duolong ore concentration area, located on the northern margin of Bangong Co-Nujiang River suture zone, possesses giant prospective typical gold-rich porphyry copper deposits in Tibet. The petrogenesis of the intrusions and the ore-forming processes of the Duolong ore concentration area are the key points for solving the tectonic evolution of Bangong Co-Nujiang River Ocean. Recently, Yanqiang Ling ophiolite belonging to Bangong Co-Nujiang River ophiolite belt was discovered on the southern side of the Duolong ore concentration area. Yanqiang Ling ophiolite which was tectonically emplaced in the Jurassic flysch sediments mainly consists of sheeted dykes, pillow basalt and silica rock. Mylonite is widely developed in the contact area between the country rock and the Yanqiang Ling ophiolite. Combined with previous studies, the authors hold that the Duolong ore concentration area developed on the basis of accretionary wedge and was in extensional setting during the Early Cretaceous. The discovery and determination of Yanqiang Ling ophiolite further constraint the geological setting of the Duolong ore concentration area and provide a new clue for extension and study of Bangong Co-Nujiang River suture zone.