Isotope methods play an indispensable role in many geological studies. The focus of radiogenic isotope research at GTK is to unravel the complex crustal history in Finland and Fennoscandian Shield.
The methods in radiogenic isotope research at GTK are U-Pb (on zircon, titanite, monazite, baddeleyite, etc.), Sm-Nd (whole rock, pyroxene, plagioclase, garnet etc.), Rb-Sr and Pb-Pb. Initially the laboratory operated on self-built mass-spectrometers, and since 1990 has a VG Sector 54 instrument for thermal ionization work.
Published radiometric ages for rocks from the Finnish bedrock can be seen here directly on a selection of base maps and other data layers.
A description of the radiometric age database and a list of relevant references is provided here.
Hannu Huhma, tel. +358 29 503 2311 and +358 40 700 3796, e-mail: hannu.huhmagtk.fi