Abstract:

Drilling，pit exploration，sampling，hydraulic ring geological survey and other geological

work were carried out in the mining right of Erdaohe iron mine，and the deposit was systematically exposed

and controlled.Based on the comprehensive analysis of the survey results，it is considered that the ore-bear⁃

ing strata of the Erdaohe iron deposit are the Hongshan Formation of the Dahongshan Group，and the ore⁃

bearing surrounding rock is the metamorphic sodium lava. The occurrence of the ore body and the formation

are obviously similar.The ore body is characterized by slow up and steep down，the thickness change is com⁃

plex，and the complexity of the internal structure of the ore body is medium.The deposit belongs to the sub⁃

marine volcanic sedimentary-metamorphic transformation type deposit，which is formed by the submarine

volcanic eruption and formed by the later metamorphic transformation and enrichment.It is considered that

the contribution of diabase intrusion to the mineralization of Erdaohe iron deposit is two-way，which is not

only beneficial to mineralization，but also has a certain ore-breaking effect on the formed iron deposit，but

the metallogenic effect is greater than the ore-breaking effect.

Key words:

Erdaohe iron deposit, orebody characteristics, ore genesis, intrusive mass