Abstract: Hatu Rare Earth Deposit is a newly discovered deposit in recent years,located north of the Middle Kunlun fault and geotectonically in the North Kunlun composite magmatic arc zone of the Eastern Kunlun orogenic belt.The tectonic-magmatic rocks are well-developed in the region.The intrusion rock bodies of the Middle Silurian in Hatu Rare Earth District are closely related to known rare earth mineralization.They are the main ore-hosting rocks of the ore body,with rock numbers I,II,and III,all of which are alkaline feldspar syenite.2 ore bodies,M1-1 and M1-2,and 2 mineralized bodies,M1-3 and M1-4,are delineated in rock body I;ore body M2-1,and 2 minera-lized bodies,M2-2 and M2-3,are delineated in rock body II.The ore (mineralized) bodies are mainly present in alkaline feldspar syenite.The deposit is a rare earth deposit related to alkaline feldspar syenite.It was formed by the mixing of mantle-derived magma from partial mantle melting and fusion in the asthenosphere and ancient crustal materials,followed by a high degree of evolution and magmatic self-metasomatism.Rare earth elements tend to be enriched in the latest alkaline feldspar syenite.