Exceptional Concentrations of Gold Nanoparticles in 1,7 Ga Fluid Inclusions From the Kola Superdeep Borehole, Northwest Russia. - Prokofiev VY; Banks DA; Lobanov KV; Selektor SL; Milichko VA; Akinfiev NN; Borovikov AA; Lüders V; Chicherov MV (Scientific reports, 2020)