Вид документа : Статья из журнала Шифр издания : 54/T 44 Автор(ы) : Kovalenker V. A., Rusinov V. L., Kabo A.E., Jambor J.L. Заглавие : The Aktepe silver-arsenide deposits, Uzbekistan Место публикации : Exploration & Mining Geology. - 1995. - Vol. 4, № 2. - С. 111-119 ББК : 54 Предметные рубрики: ХИМИЧЕСКИЕ НАУКИ Аннотация: Ores rich in native silver at the Aktepe orefield near Tashkent, Uzbekistan, are similar to the arsenide-silver ores of the Cobalt-Gowganda region, Canada. The Aktepe ores occur as shoots and lenses in narrow fissures within a middle Paleozoic gabbro massif which is surrounded by Upper Paleozoic felsic volcanics and syenite intrusions. Widespread deuteric propylitization of the massif preceded ore deposition. The ore consists mainly of native silver, which is accompanied by native arsenic and bismuth, allargentum, dyscrasite, acanthite, numerous sulfides and sulfosalts, and by a Ni-Co-Fe arsenide and sulfarsenide assemblage similar to that of Cobalt-Gowganda. The Aktepe gangue minerals are mainly calcite, ferroan dolomite, and chlorite, and the veins are bordered by a wallrock-alteration assemblage of sericite-quartz-carbonate-pyrite. A difference from Cobalt-Gowganda is that the Aktepe carbonates are iron-rich, a feature which is attributed to a genetic relationship with the iron-rich host gabbros. -Authors???? Держатели документа: Центральная научная библиотека УрО РАН Доп.точки доступа: Kovalenker, V. A.; Rusinov, V. L.; Kabo, A.E.; Jambor, J.L.