This is a good article explaining the coorelation with radium and the surrounding various types of granitic rocks in Finland
Finland is composed of pre-cambrian rocks located on the Fenno-Scandanavian shield. It is believed that several chain mountain building events took place by evidence found within the strata. Several folds were found and chronologically dated. The paper goes on to deconstruct theories put forth to explain the several granites found in Finland. I suggest reading reading this article to get furthur insight into igneous petrology in Finland.
