Geochronology and Noble Gas Isotope Signatures of Kimberlites and Lamproites of the Baltic Shield
T. Wiersberg, S. Niedermann, J. Erzinger, L. K. Levsky and K. I. Lokhov
GeoForschungsZentrum Potsdam, Department 4.2, Telegrafenberg, D-14473 Potsdam, Germany
Institute for Precambrian Geology and Geochronology, Russian Academy of Sciences, Makarova emb. 2, RUS-199034 St. Petersburg, Russia