Gold resource potential of the eastern Siberian Platform: Placers and their feeding sources

Nikiforova, Z. S.; Gerasimov, Boris; Glushkova, E. G.; Kazhenkina, A.G.

doi:10.1134/s1075701513040065

Cited by 14 publications

(10 citation statements)

References 5 publications

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“…Generalization of the results of studying the typomorphic features of placer gold and analysis of the mechanisms of its distribution in the southeastern part of the Siberian platform on the territory of the Lena-Vilyui interfluves, basin of the middle Lena and Upper Amga allowed us, for the first time, to distinguish two types of gold with certain indicators, corresponding to two stages of ore formation-Precambrian and Mesozoic (Table 1, Figure 1) [9]. The first type of gold is represented mainly by flake and lamellar forms, with a size of 0.1-0.25 mm, very high fineness (>950‰) with a surprisingly small set of impurity elements and almost complete absence of microinclusions (Table 1).…”

Section: Resultsmentioning

confidence: 88%

“…Patom, Dzherba, Tokko, Torgo rivers), the Upper Amga and the rivers of the Lena-Vilyui interfluve (Tonguo, Chebyda, Kempendyai, Namana, etc.) [9].…”

Section: Resultsmentioning

confidence: 99%

“…The indicators of placer gold (morphology, impurity elements, microinclusions, internal structures, etc.) carry extensive information about the nature of native gold, both in endogenous and exogenous conditions [1][2][3][4][5][6][7][8][9][10][11]. In exogenous conditions, the evolution of placer gold occurs, but it retains the "memory" of its primary sources.…”

Section: Introductionmentioning

confidence: 99%

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Internal Structures of Placer Gold as an Indicator of Endogenous and Exogenous Processes

Nikiforova

2022

Minerals

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The study of the internal structures of placer gold on the territory of the east of the Siberian platform, overlain by a thick cover of Mz-Kz deposits, where traditional methods of searching for gold deposits are not effective, allowed us to determine, for the first time, the stages of ore formation and conditions of its occurrence. The identified indicators of the internal structures of placer gold (structures of primary recrystallization, secondary recrystallization, thick high-grade shells) indicate that placer gold content is formed mainly due to the supply and repeated redeposition of native gold from ancient gold-bearing deposits of the Precambrian stage of ore formation to younger ones. The discovered coarse-, medium-grained, mono-grained, unclear-zonal, granulation and disintegration structures suggest a supply of gold from nearby ore sources of the Mesozoic stage of ore formation. In the weathering crust, a high-grade shell is formed. In the hydrodynamic environment, the internal structures of gold practically do not change and fully correspond to the internal structures of endogenous gold. In aeolian conditions, the internal structures are transformed. In ancient gold-bearing conglomerates, under the impact of lithostatic pressure, as well as in metamorphogenic conditions, when the PT conditions change, the internal structure changes. Thus, for the first time, on a huge factual material, it is proved that the internal structures contain extensive information both about the endogenous origin of gold (the stages of ore formation—Precambrian and Mesozoic) and about its transformation in various exogenous conditions. The identified indicator of the internal structures of placer gold for certain types of sources contribute to a more correct selection of methods for searching for ore and placer gold deposits in closed territories and assessing their prospects. The use of this method makes it possible to develop criteria for forecasting different sources and types of gold deposits based on internal structures.

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Section: Resultsmentioning

confidence: 88%

“…Patom, Dzherba, Tokko, Torgo rivers), the Upper Amga and the rivers of the Lena-Vilyui interfluve (Tonguo, Chebyda, Kempendyai, Namana, etc.) [9].…”

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Internal Structures of Placer Gold as an Indicator of Endogenous and Exogenous Processes

Nikiforova

2022

Minerals

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“…The fundamental work of N.V. Petrovskaya [2] was accepted by the world community. This was followed by the study of native gold in many regions of the world [3]- [22] Next, we give a list of regions where the study of typomorphic features of native gold was successfully conducted in the search and exploration:…”

Section: Introductionmentioning

confidence: 99%

“…(in Russia) The Siberian Platform [3] [4], the Middle course of the Lena River [5], the Lower-Amur placer region [6], Kazakhstan [7], the Northeast of Russia [8], as well as in a number of regions of the world-Alaska (Klondike and Yukon) [9]- [14], Witwatersrand [15], Australia [16], USA, Alberto Province [17],…”

Section: Introductionmentioning

confidence: 99%

Reconstruction of the Indigenous Sources of Gold of the Glu-Kharinsky Placer (Kolyma River Basin, Magadan Region, Russia)

Savva¹,

Biruykov²,

Gluhov³

2022

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A comparative analysis of typomorphic features of gold placers and indigenous sources of gold was carried out for the Glukharinsky ore-placer node (the Nadezhda deposit and Glukharinskoye, Tyomnoye, and Tyi-Jurye ore occurrences). A correlation between fineness of placer native gold and composition of relic minerals preserved inside gold particles was obtained for the first time. This made it possible to establish mineral parageneses of native gold from potential indigenous sources. The study of placer gold fineness in combination with com-position of mineral inclusions allowed us to identify seven types of gold paragenesis: petzite-hessite with a fineness of 855‰, pyrite-polybasite-galena (a fineness of 670‰), bismuth telluride (900‰), cosalite-vikingite (790‰), galena (870‰), glaucodot (950‰), and hydrohematite (840‰). It was also shown that the placer contains the material from ore occurrences of different formation: gold-quartz-porphyry occurrences in granitoids (Au-Te-Bi type) and gold-silver occurrences. The method developed by us allows one to estimate the percentage of each ore source in placer formation.

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Influence of Exogenous Conditions on the Transformation of Native Gold

Nikiforova

2023

Springer Proceedings in Earth and Environmental Sciences

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Gold resource potential of the eastern Siberian Platform: Placers and their feeding sources

Cited by 14 publications

References 5 publications

Internal Structures of Placer Gold as an Indicator of Endogenous and Exogenous Processes

Internal Structures of Placer Gold as an Indicator of Endogenous and Exogenous Processes

Reconstruction of the Indigenous Sources of Gold of the Glu-Kharinsky Placer (Kolyma River Basin, Magadan Region, Russia)

Influence of Exogenous Conditions on the Transformation of Native Gold

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