Polymetallic Mineralization at the Toyoha Mine, Hokkaido, Japan
................ INTRODUCT I ON ............. OUTLINE OF GEOLOGY ....... Geology ............. Alteration .......... Chronology .......... VEIN SYSTEM AND MINERALIZAT I ON STAGES Vein System ......... Mineralization Stages Stages of Mn and Ag in Northern Veins OCCURRENCE AND CHEM I STRY OF ORE M I NERALS .......... 4-1. Analytical Procedure ......................... 4-2. Sn-ln-containing Sulfides .................... Stannite and Kesterite ....................... Chalcopyrite一一Stannite Solid Solutions ........ Roquesite and Sakuraiite ..................... Sphalerite and Unnamed Zn-In Mineral ......... Unnamed Ag-In Mineral ........................ Hocartite and Pirquitasite ................... Rhodostannite and Toyohaite ..............・... Canfieldite? ...................・・.・.・...・... . Herzenbergite, Berndtite and Teallite ........ Unnamed Cu-Zn-Fe Mineral ..................・.. 4-3. Co-Ni-containing Sulfides ..........・・..・...・. Page ..”....”””””....”. iv ”.””.........”””.” vi “ 一 .........”...”......... Vll 一一一一e-e-e-ee一一一一一一一一一一一一e 1 ....”........”......... 3 ...”......”””..””” 3 ...”.”...”””....”” 3 ...........”””.”””. 4