Abstract: The Zhangjiashan iron deposit in Lushi country is a limonite deposit, which is first found in the processes of implementing the metallogenic prospective survey in Lushi area of Henan Province.There are several limonite ore-bodies in the Zhangjiashan deposit, which are associated molybdenum and zinc abnormities. The wall rocks of iron ore-bodies are a set of epimetamorphic rock series occurred in Dongpo Formation of Sinian System, which is dominated by siltymaterials with high carbonaceous.The analyzed results show that, the SiO₂/Al₂O₃ values of the carbonaceous phyllite from iron ore and wall rock are similar, the n(Al₂O₃)/n(Al₂O₃+Fe₂O₃)values mainly range from 0.6 to 0.9, most of SiO₂/Al₂O₃ ratios are less than 5, and the K₂O contents are more than Na₂O contents in the most samples. For the trace elements, the Sr/Ba ratiosindicate that these carbonaceous phyllites were mainly sourced from terrigenous sediment.The rare earth distribution patterns of these phyllites are similar, showing the enrichment of LREE and the obvious loss of Eu.The iron was formed in the semi-closed limited oceanic basin-bathyal environment, which was relatively quiet(less volatile) and alternated with oxidation and weak reduction. The iron ore and C phyllite arederived from terrigenous sediment, with small part of them might be related with volcanism. The dolomitic limestones in the Xunjianshi Formation of Guandaokou Group were the results of marine deposition, which may be different from iron ore and C phyllite.