2 1 20 A 1.7 Ma hybrid epithermal Au-Ag-Sn-W deposit E. Marcoux Primary Author J.P. Milesi Primary Author Y. Sunarya Primary Author P. Nehlig Primary Author A. Sukandar Primary Author J. Felenc Primary Author mixed material Bulletin of the society of economic geologistic 1994 T. Sitorus Additional Author E. Marcoux Primary Author M. Simandjuntak Additional Author J.P. Milesi Additional Author mixed material Jakarta BRGM 1999