Xiarihamu is the first large Cu–Ni magmatic deposit discovered in Eastern Kunlun, Qinghai Province, China.
Xiarihamu II mafic–ultramafic complex has a close temporal relationship with the mineralization.
The complex probably formed in a post-collisional, extensional regime.
Earlier enrichment of the lithospheric mantle aided the generation of mafic magma, eventually forming the complex and deposit.