GEOCHEMICAL FEATURES OF PYRITE TYPES OF THE KUMTOR GOLD DEPOSIT, KYRGYZSTAN

Successively forming sedimentary-diagenetic (Py1), metamorphic (Py2) and hydrothermal (Py3) pyrite types are recognized in black shales of the Kumtor gold deposit (Central Tien Shan). According to LA-ICP-MS analysis, each type exhibits specific geochemical features. Sedimentary-diagenetic pyrite is characterized by higher median Mn, Tl, Co, Ni, As, Sb, Pb and Mo contents. The contents of these elements, as well as Au, Ag, Te and W, gradually decrease from framboidal to crystalline-grained pyrite. The minimum contents of most trace elements are typical of metamorphic pyrite and pyrrhotite. Hydrothermal pyrite is characterized by strongly variable Cu, Se, Zn, Pb, Sb, Au, Ag, Te, Ti, W contents due to microinclusions of chalcopyrite, sphalerite, tetrahedrite, native gold, galena, altaite, Au-Ag tellurides, rutile and scheelite. The correlation between Au, W and Ti contents is established. Our data are in line with a multistage model of (Large et al., 2011), who considers sedimentary-diagenetic sources of most chemical elements, which are mobilized to the fluid during formation of pyrrhotite and form their minerals during hydrothermal stage

Proceedings of the fourth annual participants' information meeting, DOE Low-Level Waste Management Program

The Fourth Annual Participants' Information Meeting of the Department of Energy Low-Level Waste Management Program was held in Denver, Colorado, August 31 to September 2, 1982. The purpose of the meeting was to report and evaluate technology development funded by the program and to examine mechanisms for technology transfer. The meeting consisted of an introductory plenary session, followed by two concurrent overview sessions and then six concurrent technical sessions. There were two group meetings to review the findings of the technical sessions. The meeting concluded with a plenary summary session in which the major findings of the meeting were addressed. All papers have been abstracted and indexed for the Energy Data Base