This paper presents a brief overview of some IRGIREDMET advances in gold hydrometallurgy. Original impulse-percolation technology and equipment for intensive cyanidation of gravity
concentrates have been developed and introduced into industrial practice by IRGIREDMET since 1980s (RF Patents N1593250). The process is based on leaching using special hydrodynamic and reagent conditions providing high dissolution rate for coarse gold particles. Gold and silver are precipitated from pregnant solution by cementation or electrowinning. There was also proposed an improved cementation method using zinc in a contact with electrically conductive material.

Монография посвящена крупнейшему на северо-востоке России Нежданинскому золоторудному месторождению. В основу монографии положены многолетние авторские исследования геологии, структуры, минералогии и геохимии пород, метасоматитов и руд. Работа насыщена многочисленными и разнообразными аналитическими данными по типоморфизму минералов, флюидным включениям, стабильным изотопам, интерпретация которых проводится с точки зрения геолого-гененетического моделирования на современном научном уровне, позволяющем судить об условиях формирования месторождения.
Монография представляет интерес для специалистов в области геологии рудных месторождений, минералогии и геохимии.

The Kapai Slate is a continuous, pyrite-rich carbonaceous shale horizon within the St. Ives Au district that is spatially related to high-grade Au mineralization. In situ laser ablation-inductively coupled mass spectrometry (LA-ICPMS) trace element analyses, in situ sensitive high resolution ion microprobe, stable isotope (SHRIMPSI) S isotope analyses, and optical microscopy pyrite texture analyses were used to examine the different pyrite types in the Kapai Slate and Au deposits. These data were also used to confirm that the trace element signature of sedimentary pyrite can be preserved in rocks that underwent upper to mid-greenschist facies metamorphism and significant hydrothermal overprint. The data were further utilized to gain a more detailed understanding of the ocean conditions during deposition of the Kapai Slate and determine whether some of the Au and S in the St. Ives district could have been sourced from the Kapai Slate.

В монографии изложены результаты многолетних (2004 - 2018гг) научно - исследовательских, прогнозно - металлогенических и поисковых работ авторов на площ ади Куртуш ибинского зеленокаменного пояса позднерифейского возраста, располож енного в юго-восточной части Западного Саяна. Обобщены и систематизированы все имеющиеся на 2018 год материалы по стратиграфии, магматзму, тектонике, золотоносности, проведена корреляция, формационные и фациальные анализы геологичеких и рудных образований, уточнены их возраст, взаимоотнош ения и распространение.

Geology and gold deposits of the Oatman district, northwestern Arizona

Geology and gold deposits of the Marysville mining district, Montana

Gold deposits of the Boulder County gold district, Colorado

The Goldfield gold district, Esmeralda and Nye Counties, Nevada

The Tonopah precious-metal district, Esmeralda and Nye Counties, Nevada

The Republic gold district, Ferry County, Washington

The Comstock Lode precious-metal district, Washoe and Storey Counties, Nevada

The gold deposit at La Josefina, in the Deseado Massif of Argentina, is a low-sulfidation epithermal deposit with some features of the intermediate sulfidation style; the Au occurs in quartz veins and hydrothermal breccias hosted by acid pyroclastic rocks produced by Jurassic bimodal volcanism. Exploration for this deposit type uses geochemical data for vectoring to mineralized rocks. Although a general suite of elements with anomalous concentrations around low-sulfidation deposits is known, that suite varies amongst individual deposits, which should be studied individually.

Epithermal gold deposits in Chile are Cretaceous to Cenozoic in age. The ores and the volcanic rocks with which they are associated were generated at a noncollisional, ocean-continent convergent plate margin. They are related to long, slightly sinuous north-northeasttrending magmatic belts roughly parallel to the Pacific coast. Most of the deposits are associated with eroded volcanic centers and subvolcanic porphyries. North-south variations in the nature, extent, and timing of magmatism control the succession of mineralization events. In the Late Cretaceous, vein districts (e.g., E1 Bronce) and hydrothermal alteration zones were formed in central Chile.

The El Dorado Au-Cu deposit is located in an extensive intra-caldera zone of hydrothermal alteration affecting Upper Cretaceous andesites of the Los Elquinos Formation at La Serena (
29470 S Lat., 70430 W Long., Chile). Quartz-sulfide veins of economic potential are hosted by N25W and N20E fault structures associated with quartz-illite alteration (þsupergene kaolinite).

Металлы платиновой группы это важнейшее стратегическое сырье, в связи, с чем потребность в их обнаружении представляет очень важную задачу для геологии. С каждым годом увеличивается потребность в золоте и металлах платиновой группы. К числу перспективных на благороднометалльное оруденение относится Центральный регион России. Необходимо развитие социально-экономического положения этого региона за счет увеличения минерально-сырьевой базы.