On the genesis of the gold-silver deposit Kupol (North-East of Russia)

2020 ◽  
pp. 39-47
Author(s):  
Nikolay Ostapenko ◽  
Olga Neroda

A new version of genesis of the epithermal gold-silver deposit Kupol (Chukotka), its mineral composition of ores and conditions of ore-localization based on the analysis of published geological materials on the geological structure had purposed in this article. The active thermal ore-forming role of completing the volcanic cycle of the multiphase subvolcanic complex’ the proximal bodies of the Upper Cretaceous rhyolites had been proved. The main factors of this deposit’ formation and the conditions that favored the appearance of large ore bodies and rich ores were considered. The magma chamber, unified faulty magmatic and fluid conductor, rock screen, flank clusters of subvolcanic rhyolite bodies and their integral thermal anomalies that initiated and sustained the deep fluid thermal convection under the screen, its mixing with fractured pore and meteoric waters and formation of gradient temperature zones, were considered among the main factors. The conjugation of these factors in space and time, the active tectonic regime and the long-term preservation of the deformation plan were the favorable conditions for ore formation. They maintained the high permeability of the fluid conductor, prevented a wide dispersion of fluids and provided a telescopic deposition of different mineral parageneses.

2020 ◽  
pp. 48-63
Author(s):  
Aleksandr Kokovkin

A new version of genesis of the epithermal gold-silver deposit Kupol (Chukotka), its mineral composition of ores and conditions of ore-localization based on the analysis of published geological materials on the geological structure had purposed in this article. The active thermal ore-forming role of completing the volcanic cycle of the multiphase subvolcanic complex’ the proximal bodies of the Upper Cretaceous rhyolites had been proved. The main factors of this deposit’ formation and the conditions that favored the appearance of large ore bodies and rich ores were considered. The magma chamber, unified faulty magmatic and fluid conductor, rock screen, flank clusters of subvolcanic rhyolite bodies and their integral thermal anomalies that initiated and sustained the deep fluid thermal convection under the screen, its mixing with fractured pore and meteoric waters and formation of gradient temperature zones, were considered among the main factors. The conjugation of these factors in space and time, the active tectonic regime and the long-term preservation of the deformation plan were the favorable conditions for ore formation. They maintained the high permeability of the fluid conductor, prevented a wide dispersion of fluids and provided a telescopic deposition of different mineral parageneses.


Author(s):  
V. A. Stepanov ◽  

Information on the geological and isotopic age of the Kubaka gold-silver deposit in the Omolon middle massif in the North-East of Russia is presented. It has been established that the Kubaka deposit geological age lies in between the Late Devonian age of the Kedon series volcanites, containing the gold-silver mineralization, and the Early Carboniferous age of the Korbinsky suite terrigenous rocks, overlapping the volcanites and the mineralization. The post-ore nature of the Omolon complex dykes, which produce no significant impact on the distribution of gold mineralization in ore bodies, is shown. According to isotope dating, the following stages of the Kubaka deposit formation are distinguished: the accumulation of the Kubaka suite tuffs (369 Ma); the introduction of subvolcanic intrusions (344 and 337 Ma); the formation of ore metasomatites (335±5 Ma); the formation of gold-silver mineralization (330 and 334 - 324 Ma); the introduction of post-ore dikes (179±8 - 176±10 Ma).


1996 ◽  
Vol 38 (7) ◽  
pp. 625-648 ◽  
Author(s):  
S. F. Strujkov ◽  
O. B. Ryjov ◽  
V. V. Aristov ◽  
N. V. Grygoriev ◽  
Yu. I. Radchenko ◽  
...  

Author(s):  
С.Г. Парада

Осуществлена оцифровка данных аналоговой аэромагнитной съемки конца 60-х годов прошлого столетия, что дало возможность применить цифровые методы обработки больших массивов данных на основе ГИС-технологий. Решались две задачи – получение числового массива, описывающего ∆Та по исследуемой площади и выделение разномасштабных аномалий поля ∆Та (локальных, площадных и региональных), обусловленных геологическими объектами, представляющими металлогенические факторы (рудогенерирующие интрузивные тела, рудоподводящие, рудораспределяющие и рудолокализующие разломы, признаки литологического контроля оруденения). В итоге выделены аномалии регионального и площадного (среднемасштабного) фона магнитного поля и локальные аномалии. Это позволило уточнить геологическое строение и металлогенические перспективы территории. В частности, по особенностям распространения локальных аномалий и площадного фона выявлено и прослежено продолжение Малкинского гранитоидного массива под толщей метаморфических сланцев далее на северо-восток, установлено, что наиболее перспективная часть Малка-Муштинского рудного узла располагается в кровле Малкинского гранитного массива, в месте ее резкого погружения по крутому рудоподводящему разлому северо-западного простирания. Выделение локальных аномалий магнитного поля позволило выявить не выходящие на поверхность (слепые) тела габбро-диабазов и габбро-диоритов Хасаутского интрузивного комплекса на правобережной части Малка-Муштинского рудного узла, что расширяет перспективы обнаружения слепых рудных тел. Digitization of data of analog aeromagnetic survey of the late 60-ies of the last century was carried out, which made it possible to apply digital methods for processing large amounts of data on the basis of GIS technologies. We focused on two tasks – getting numeric array describing ∆of The study area and the allocation of multi-scale anomaly field ∆TA (local, areal and regional), due to geological features that represent metallogenic factors (rodegenerative Intrusive body, retopologise, rodorazresheniye and ore localizing faults, signs of lithological control of mineralization). As a result, the anomalies of the regional and area (medium-scale) background of the magnetic field and local anomalies are identified. This allowed to clarify the geological structure and metallogenic prospects of the territory. In particular, by the peculiarities of local anomalies and area background distribution, the continuation of the Malkin granitoid massif under the thickness of metamorphic shales further to the North-East was revealed and traced, it was found that the most promising part of the Malka-Mushta ore node is located in the roof of the Malka granite massif, at the place of its sharp immersion in the steep ore-producing fault of the North-Western strike. The isolation of local magnetic field anomalies allowed to reveal non-surface (blind) bodies of gabbro-diabases and gabbro-diorites of the Khasaut Intrusive complex on the right Bank of the Malka-Mushta ore node, which extends the prospects for the detection of blind ore bodies.


2021 ◽  
Vol 36 ◽  
pp. 01003
Author(s):  
Elena Vologzhanina ◽  
Galina Batalova

The results of the study of 12 varieties and promising lines of glumaceous oat in the competitive variety testing of the FASC of the North-East (Kirov region) in the period from 2018 to 2020 are presented. The purpose of the research is to assess the productivity, ecological plasticity and stability of the genotypes of glumaceous oat for feed and universal use in the conditions of the Volga-Vyatka region. The dependences of grain yield and dry matter harvesting on the state of agro-climatic resources (HTC), temperature and precipitation are established. The contrasting weather conditions during the years of research allowed to conduct the most complete assessment of the studied genotypes. The most favorable conditions for the formation of a high yield of green mass of oat were formed in 2020 (Ij=3.76), grain - in 2019 (Ij=1.35). The average degree of positive dependence of green mass yield on the height of oat plants was revealed (r=0.51). The variety of the high-intensity type of the universal direction Medved, promising lines of the mowing direction (178h13 and 245h14) are distinguished.


Author(s):  
V.N. Goldyrev ◽  
◽  
V.A. Naumov ◽  
O.B. Naumova ◽  
◽  
...  

In the coming years, the mine of LLC "Rudnik Valunisty" developing the gold and silver Valunistoe and Gornoye deposits will exhaust economically justified reserves. One of the ways to extend the life of the mine and increase the profitability of production should be the extraction of man-made secondary mineral resources. The purpose of the study is to identify the main types of solid and hydromineral form of technogenic-mineral formations at the Valunistoe Deposit, as well as to estimate the possibility of their industrial development. The useful components content was determined and calculated. The results of theoretical modeling of physical and chemical parameters of hypergenic mineral formation of the solid part of technogenic-mineral formations are shown. Objects of formation of technological waters are given. The conditions of concentration of gold and other metals are considered.


Author(s):  
A. N. Glukhov ◽  
◽  
M. I. Fomina ◽  
E. E. Kolova ◽  
◽  
...  

The authors briefly characterize the geology and structure of the Shtokovoye ore field attached to the area where the Khurchan-Orotukan zone of tectonic-magmatic activation overlays the structures of the Yana-Kolyma ore-bearing belt. Studied are mineral associations and physicochemical conditions of gold ore bodies, located both in granites and in hornfelsed sedimentary masses. By the main features of its geological structure, ore composition, and physicochemical formation conditions, the Shtokovoye ore field mineralization corresponds to the "depth" group of the gold-rare-metal formation, analogous to the Butarnoye, Basugunyinskiye, Dubach, and Nadezhda occurrences. Its ores are peculiar in the late epithermal mineralization, which is associated with the Okhotsk-Chukotka volcanic belt and overlays the sinaccretional gold-rare-metal mineralization.


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