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1.Objective rnAs an important component of the southern Central Asian Orogenic Belt (CAOB), North Xinjiang in NW China is characterized by numerous Cu-Ni sulfide-bearing maficultramafic intrusions, and this region constitutes the secondlargest Cu-Ni metallogenic province in China.Zircon U-Pb chronology studies reveal that these intrusions predominantly formed in the Early Permian (300-270 Ma;Qin KZ et al.,2011).