EM Studies of Tyrisevä Intrusion in Ni-Belt, South-Western Finland

P223 EM Studies of Tyrisevä Intrusion in Ni-Belt South- Western Finland T.V.J. Jokinen* (Geological Survey of Finland) H.J. Hongisto (Geological Survey of Finland) & M.K. Oksama (Geological Survey of Finland) SUMMARY The Tyrisevä ultramafic intrusion in Vammala Ni-belt South-Western Finland has been studied by geophysical surveys in order to constrain its internal structure and potential for Ni-sulphide deposits. Especially there has been tested SAMPO wide band EM system and STROB transient EM equipment in order to estimate the resolution in detecting a moderate conductor in the central part of the intrusion. The interpretation of EM data has been made utilizing