Abstract: An iron ore deposit in Liberia is located in the Archean metallogenic area of Man Earth Shield in the south of West Africa Craton.It is a typical sedimentary metamorphic iron deposit with a large scale and prospecting rights obtained by Chinese enterprises.The Birimian green rock belt of Archean Man Earth Shield is an important metallogenic belt in the region.There are many iron depoists and mineral occurrences are found in the metallogenic belt.The deposit in Liberia is one of the representative deposits in the metallogenic area，orebodies are generally distributed with layered and stratiform-like，and they are generally exposed with the shape of “U” and “W”.Based on the 1∶250 000 regional geological survey results and some related geological working achievements，in view of the characteristics of widely distributed and thick Quaternary overburden，high degree of regional metamorphism and more complicated orebody shape，high-precision magnetic survey and EH4 survey have been conducted in the area.The iron-bearing formation area can be identified effectively by the zoning of positive- negative-positive magnetic anomalies obtained by high-precision magnetic survey，spatial orientation of iron-bearing formation and orebodies can be conducted based on the low-resistance anomalies acquired by EH4 survey，through the systematic application of geological survey，exploratory trench and drilling，breakthrough in prospecting and exploration has been achieved in the area.According to the deposit geological characteristics，geophysical characteristics and prospecting indicator，the prospecting model of sedimentary metamorphic iron deposit is established.The two delineated prospecting target areas are verified，the prospecting effects is good.The above discussion results can provide reliable reference for the further prospecting work of the area and sedimentary metamorphic iron deposit in other areas.

Key words: Sedimentary metamorphosed deposit, High-precision magnetic survey, EH4 survey, Prospecting target area, Deposit genesis, Prospecting model