Power Reactor and Nuclear Fuel Development Corporation (PNC) of Japan has been undertaking the uranium exploration in Niger since 1981.
This paper introduces the Mini-Sosie method which was applied in this work during 1982 and 1984. About 200 km of survey lines in total has covered more than 1800 km². In the west region of the target area, at least two reflectors were found. On the basis of measurement of elastic wave velocity these reflectors were considered to be the lithological boundaries between lower limit of analcime-rich facies in Abinky Formation and sandstone in Tchirezrine 1 Formation, and between sandstone and mudstone in upper Izegouandan Formation. These reflectors enabled us to interpret the structure of the target area.
An on-site data processing system using the microcomputer was developed for qualitative check at camp. This system has the basic processing software including the synthetic seismogram. The system is capable of processing the data to check the possible failure in data acquisition process and is useful in determining the most suitable survey specification.