关键词: 单晶河铁矿, 成矿条件, 矿床成因, 找矿标志

Abstract: Danjinghe iron deposit is located in Daqinggou depression platform of the North China platform. The surface of mining area is composed of Neogene basalt and lake sediments construction，un⁃ derlying intrusive bodies during Hersinian of Archaeozoic. To further clarify the relationship between depos⁃ it and stratum lithologic，and check up the key mineralization function and restricting mechanism，the geo⁃ logical characteristics，metallogenic conditions and ore genesis have systematically studied，based on the field geological work. The research shows that Danjinghe iron ore (mineralization) are mainly controlled by contract zone of magmatic rock and marble，which occurring in stratiform-like forms. The Dangjinghe iron deposit belongs to typical contact-replacement-skarn type deposit，and the skarn minerals include diop⁃ side，calcite and termolite. The multi-layer marble in lower part of Taipingzhuang Formation in Hongqiy⁃ ingzi Group regard as mother rock for mafmatic rock. The magmatic activity of Caijiaying fracture zone has characterized by strong-frequent activities，the regional fault and secondary fault provided migration chan⁃ nel，which developed sodium-diopside skarn belt and iron ore during migration process. The Danjinghe de⁃ posit has strict metallogenic specialization，and contact zone between mica-bearing monzonitic granite and marble，skarinizaiton can be regard as significant ore indicators.

Key words: Danjinghe iron deposit, metallogenic conditions, deposit genesis, prospecting marks