Mineral Types of Gold Deposits and Regularities of Their Localization in Southeastern East Sayan

Дамдинов, Б. Б.

doi:10.1134/s1075701519020016

Cited by 13 publications

(7 citation statements)

References 18 publications

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“…The fragments of granitoids, dikes, and ultrabasic rocks contributed some elements that could explain the presence of Bi-, W-, Te-, Ni-, and Co-bearing phases in the epigenetic gold ores. These element enrichments are unusual for the Eastern Sayan orogenic gold deposits [21,36] although they are known to be present in other orogenic gold deposits [7,9,59,60]. At a depth of about 3-5 km, the ore formation began.…”

Section: Deposit Genesismentioning

confidence: 81%

“…The southeastern part of Eastern Sayan in the metallogenic zoning is the Oka ore province [20], which includes some large gold districts (Ilchir, Bokson-Gargan, Oka, and Khamsara) hosting numerous gold deposits [21]. The most significant economic orogenic gold deposits are located near the edge of the Archean Gargan block, a part of the basement of the Tuva-Mongol microcontinent and in spatial association with surrounding ophiolite belts.…”

Section: Regional Geology and Tectonicsmentioning

confidence: 99%

“…According to the modern model for the origin of orogenic gold deposit subducted oceanic crust devolatilization is one of the main sources of gold and accompanying elements [6]. It explains the spatial association of Eastern Sayan orogenic gold deposits with ophiolite belts [20,21].…”

Section: Deposit Genesismentioning

confidence: 99%

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Zun-Kholba Orogenic Gold Deposit, Eastern Sayan, Russia: Geology and Genesis

et al. 2022

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In this paper, we present a new point of view on the deposit geology and genesis of the largest gold deposit in Eastern Sayan, Zun-Kholba. Quartz–sulfide replacement ores and shallow quartz veins are of great economic importance. At the deposit, quartz–pyrite ore bodies are dominant, whereas paragenetically late base metal-bearing quartz veins occur only at shallow levels. The study of the fluid inclusions, stable isotopes (C–O–S), and mineral geothermometry allowed us to determine the P–T conditions of ore deposition. It is established that the temperature of ore formation changed from 380 to 433 °C at the deepest levels of the deposit to 316 °C at the shallowest levels. The pressure estimates for gold deposition at 570–950 bar were calculated for the 1490-m level in the center of the deposit. The determined P–T conditions can help estimate the average depth of deposit formation at about 3.6 km. Ore mineral assemblages were formed from homogeneous fluids of low to moderate salinity (2.4–7.9 wt.% eq. NaCl). The sulfur isotope composition of sulfide minerals (δ34S = 0–4.6‰), as well as pyrite geochemistry, corresponds to that of older volcanogenic massive sulfide (VMS) occurrences, which are widespread within the Eastern Sayan ophiolitic belts. Lens-like fragments of metamorphosed VMS-type sulfide ores are also present in the Zun-Kholba deposit. The oxygen isotope data indicate a metamorphic origin for the ore-forming fluids. Migrating metamorphic fluids may have become enriched in gold, sulfur, and other metals during the flow through the complex ore-hosting lithologies, including ophiolitic bodies with sulfide-rich VMS fragments that are characterized by a relatively high content of gold and related ore elements. The obtained data allow us to suggest a metamorphic devolatilization model for the genesis of the Zun-Kholba gold deposit.

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Section: Deposit Genesismentioning

confidence: 81%

Section: Regional Geology and Tectonicsmentioning

confidence: 99%

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Zun-Kholba Orogenic Gold Deposit, Eastern Sayan, Russia: Geology and Genesis

et al. 2022

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“…ARIMA's characteristics make it can only be applied to stationary sequences. When encountering unstable series, we must use methods such as difference to convert them into stationary series before time series prediction [20][21][22].…”

Section: Parameter Determinationmentioning

confidence: 99%

A Diluted Bitcoin-Dollar-Gold Mean Prediction Scheme Based on Periodic Prediction Method

Guo

Gao

et al. 2022

IEEE Access

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This paper introduces a diluted prediction method for bitcoin and gold based on cycle prediction. This method does not need to quantify the external parameters like robot learning and neural network autoregressive model, but mainly uses ARIMA to feedback the parameter values into risk coefficients under the condition of obtaining the optimal solution circularly, and the price prediction of a single period in the future is carried out with a fixed number of samples, thus realizing the high-precision prediction of bitcoin and gold prices. In the application simulation, the real data of bitcoin and gold from 2016 to 2021 are selected. After 1000 times of Monte Carlo simulations, 919 times of the yield is more than 3 times, 157 times of the yield is more than 8 times, and the minimum yield is about 2 times. At the same time, this paper puts forward an investment strategy for this prediction method, which realizes a very safe profit with a final return rate of 6.2 times under the condition of making full use of the prediction risk coefficient. The prediction method and investment scheme bring a brand-new high-precision prediction method and targeted investment strategy with high safety coefficient to all the investors, which has great economic value.INDEX TERMS ARIMA, Periodic method, Monte carlo, Circulation, White noise, ADF.

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“…The formation of large deposits of ore gold (Zun-Holba, Vladimirskoye, Pioner, Zun-Ospa, etc.) is spatially related to the thrust ophiolite structures [24][25][26].…”

Section: Introductionmentioning

confidence: 99%

Mineralogy, Geochemistry, and Geochronology of the Yehe-Shigna Ophiolitic Massif, Tuva-Mongolian Microcontinent, Southern Siberia: Evidence for a Back-Arc Origin and Geodynamic Implications

et al. 2022

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The new results have been represented of mineralogical–geochemical and geochronological studies of rocks of the Yehe-Shigna ophiolite massif located in the Tuva-Mongolian microcontinent in the northern part of the Central Asian orogenic belt (Eastern Sayan, Southern Siberia). The Yehe-Shigna ophiolite massif is part of the Belsk-Dugda ophiolite belt. The structural position, age, and geochemical characteristics of the belt indicate its formation in the setting of the back-arc basin of the Shishkhid intraoceanic island arc, developing in the period of 810–750 million years. It is assumed that together with the same-age formations of the Oka accretion wedge and the Sarkhoi active margin, it formed on the convergent margin of the Gondwana supercontinent. Its basement is represented by the Archean-Early Precambrian crystalline rocks and carbonate cover (“Gargan Glyba”). The gold-bearing Neoproterozoic deposits with dominant gold-telluride assemblages are localization in large ophiolites thrust zones along with the frame of the “Gargan Glyba”. They are allochthonous with respect to the Late Neoproterozoic-Cambrian Tuva-Mongolian island arc of the Siberian continent. A similar type of gold deposit is probably worth looking for ophiolites thrust zones in other Precambrian Gondwana-derived microcontinents.

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Mineral Types of Gold Deposits and Regularities of Their Localization in Southeastern East Sayan

Cited by 13 publications

References 18 publications

Zun-Kholba Orogenic Gold Deposit, Eastern Sayan, Russia: Geology and Genesis

Zun-Kholba Orogenic Gold Deposit, Eastern Sayan, Russia: Geology and Genesis

A Diluted Bitcoin-Dollar-Gold Mean Prediction Scheme Based on Periodic Prediction Method

Mineralogy, Geochemistry, and Geochronology of the Yehe-Shigna Ophiolitic Massif, Tuva-Mongolian Microcontinent, Southern Siberia: Evidence for a Back-Arc Origin and Geodynamic Implications

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