The Kujinggou graphite deposit is located in the southern area of Weining Beishan,Ningxia and Alashan Zuoqi,Inner Mongolia.The ore body is hosted in the regional metamorphic rocks of the Lower Car-boniferous Chouniugou Formation,and the original rocks are sedimentary construction of shallow marine terres-trial clastic and carbonate rocks.The ore body is distributed in parallel layers in the metamorphic quartz sand-stone,which is basically consistent with the stratigraphic production,with a near east-west orientation.The ore is mainly graphite-bearing carbonaceous slate with an average fixed carbon content of 5.53%.Graphite is main-ly produced as irregularly scaled single crystals or as massive polycrystalline assemblages,mostly larger than 1 µm.Graphite ore is characterized by low Si,low alkali and high LOI as a whole,and trace element analysis shows enrichment of Rb,Ba and Sr.The ∑REE of graphite ore ranges from 101×10-6 to 137×10-6,with an aver-age of 117×10-6,and the ∑REE of the host rocks is 42×10-6.The REE distribution patterns of both graphite ore and host rocks are high on the left and low on the right,and the ∑REE in graphite ore is higher than that in host rocks,which shows a high degree of REE differentiation in ore and host rocks in general,and a significant en-richment of LREE.The negative anomalies of Eu and Ce are obvious.The carbon isotope values of the graphite ore vary very little and are concentrated between-24.3‰ and-24.0‰,indicating that the carbonaceous source is mainly organic with some inorganic carbon involved.The genesis type of this deposit is regional metamor-phic,and the shallow marine and lagoonal sedimentary environment makes the material basis for the graphite formation in Kujinggou,graphite formation is closely related to regional metamorphic deformation
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