The Geochemistry of Volcanogenic Mineralization in the Northwestern Segment of the Pacific Ore Belt: Northeast Russia

Волков, А. В.; Sidorov, A. A.; Savva, N. E.; Kolova, E. E.; Chizhova, I. A.; Murashov, K. Yu.

doi:10.1134/s0742046317060070

Cited by 8 publications

(3 citation statements)

References 13 publications

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“…Volcanogenic (epithermal) [52]-in volcanic belts of any age associated with volcanic activity in basic volcanic rocks of the oxidized type, shallow (gold-silver adularia).…”

Section: Discussionmentioning

confidence: 99%

Typomorphism of Native Gold (Geological-Industrial Types of Gold Deposits in the North-East of Russia)

et al. 2022

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This study presents the typomorphic features of native gold grains from three different geological-industrial types (GIT) of gold deposits in the North-East of Russia: (1) gold–arsenic-sulfide in black shale strata (Natalka, Degdekan, Karalveem, Maldyak deposits), (2) gold–quartz veins in granitoids (Dorozhnoye, Butarnoye, Shkolnoye, Maltan deposits), and (3) gold–silver adularia in volcanogenic strata (Kupol, Olcha, Kubaka, Burgali, Primorskoe, Dalnee deposits). The reliability of the geological interpretation is directly related to mineral associations, fineness variations, its internal structure and the content of microimpurities. Native gold is a reliable indicator for identifying various GIT of gold deposits at the early geological-prospecting stages of studying gold-bearing areas. Typomorphic features of native gold for each of the considered GIT are stable and do not depend on the age and scale of mineralization. It is shown that using an integrated approach obtains genetic information about a particular ore object, which makes it possible to predict the vertical range of mineralization and outline the technology for processing ores. The information obtained can also be effectively used in the search for placer deposits in nearby watercourses. Identification of typomorphic features of ore and placer native gold opens up wide opportunities for delineating the distribution areas of placer deposits.

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“…Volcanogenic (epithermal) [52]-in volcanic belts of any age associated with volcanic activity in basic volcanic rocks of the oxidized type, shallow (gold-silver adularia).…”

Section: Discussionmentioning

confidence: 99%

Typomorphism of Native Gold (Geological-Industrial Types of Gold Deposits in the North-East of Russia)

et al. 2022

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“…Рудопроявление Кыплатап кроме рудной ассоци ации элементов характеризуется довольно высоким превышением концентраций Bi, Sn, Pb и Cu (с обога щением 5-100 раз), при этом отмечается высокая сереброносность и низкая золотоносность (отноше ние Au/Ag -1:450), что характерно для промежу точного класса эпитермальных месторождений [10].…”

Section: обсуждение полученных результатовunclassified

Geochemical Features of the Kyplatap Ag-Au Ore Occurrence in Central Chukotka

Pilitsyn¹,

Волков²,

Pilitsyna³

2023

AEE

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The article considers the geochemical features of unconventional mineralization in secondary quartzite’s of the Kyplatap ore occurrence, located on the southeastern flank of the volcanic dome structure (VDS) of the same name, complicating the Palyavaam-Pykarvaam volcanotectonic depression (VTD) in the Chaun zone of the Central Chukotka sector of the Okhotsk-Chukotka volcanic Belt (OChVB). The Kyplatap VDS was formed due to the intrusion into the Late Cretaceous Alkaquun volcanites of a large laccolith-like subvolcanic body composed of rhyolite-trachyriolite-trachydacites. Based on the geochemical studies of the Kyplatap ore occurrence, the authors compiled a representative database of geochemical data, including the results of analyses of express-RFA, PKSA and XSA with coordinates and composition of ores and rocks. Correlation analysis of the database showed a positive relationship between Au and Ag, as well as Sb for ore mineralization, and a negative correlation of these elements with the association of the rock group of elements (Ti, Y, Zr, Nb and Yb) that were removed during ore formation. The authors also distinguished the second rock group of elements (K, Ga, Sn, Ba, V, W, Pb, Sc, La and B), characterized by medium and weak correlation of the first group of elements. They calculated the coefficients of enrichment and deficiency of ore-forming elements for the samples taken within the ore zones of the Kyplatap ore occurrence. The extreme enrichment group includes elements Au, Ag, Sb, Bi, As, the average contents of which are 100 times or more, and the minimum concentrations are at least 2-10 times higher than the average contents in the upper crust. The normal enrichment group includes elements S, Sn, Cu, Zn, Mn, Mo and Pb, the average contents of which are 2-10 times, and the maximum concentrations are 5-100 times higher than the average concentrations of the upper crust. The obtained values of the enrichment coefficients indicate a sufficiently intensive metensomatoses and ore formation within the Kyplatap ore occurrence.

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“…Для рудообразующих систем, распространенных на северо-востоке России, установлены различные формационные типы месторождений золота, от-личающиеся друг от друга индикаторным набором микроэлементов [2].…”

Section: Introductionunclassified

ogical and information models for forecast and rapid assessment of new gold deposits in the Arctic zone of Russia

Chizhova¹,

Lobanov²,

Волков³

2019

AEE

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Статья поступила в редакцию 1 марта 2019 г. Подготовлены логико-информационные модели, основанные на репрезентативной аналитической базе данных по 95 месторождениям и рудопроявлениям золота северо-востока России. Модели рассчитаны для пяти формационных типов месторождений: Au-Ag-эпитермального; Au-кварцевого; Au-сульфидного (вкрапленных руд); Cu-Mo-Au-порфирового; колчеданно-полиметаллического, обогащенного Au и Ag. Разработаны правила, позволяющие надежно идентифицировать формационный тип новых объектов (43 ошибки из 289 проб, качество распознавания -0,85). Показано, что созданные модели могут быть использованы для экспресс-оценки новых рудопроявлений золота в Арк тической зоне России.

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The Geochemistry of Volcanogenic Mineralization in the Northwestern Segment of the Pacific Ore Belt: Northeast Russia

Cited by 8 publications

References 13 publications

Typomorphism of Native Gold (Geological-Industrial Types of Gold Deposits in the North-East of Russia)

Typomorphism of Native Gold (Geological-Industrial Types of Gold Deposits in the North-East of Russia)

Geochemical Features of the Kyplatap Ag-Au Ore Occurrence in Central Chukotka

ogical and information models for forecast and rapid assessment of new gold deposits in the Arctic zone of Russia

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