Isotope (δ34S, δ13C, δ18O) Compositions of Disseminated Sulfide Mineralization in Igneous Rocks of the Dukat Ore Deposit (Northeastern Russia)

Дубинина, Е. О.; Filimonova, L. G.; Kossova, S. А.

doi:10.1134/s1075701519010033

Cited by 7 publications

(4 citation statements)

References 19 publications

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“…In contrast to the ice sheet records, the sulfur isotopic compositions of sulfate in the ice-wedge samples from East Siberia are broadly consistent with those of the basement rocks [86,[90][91][92]. Basement lithologies would not change dramatically on submillennial timescales, except in cases involving rapid denudation of tectonically active mountain belts or major volcanic eruptions (e.g., [117,118]), neither of which are likely in the study areas.…”

Section: Potential As a Temporal Proxy For Past Environmental Changementioning

confidence: 64%

“…On the other hand, Batagay and Zyryanka belong to the Verkhoyansk‐Kolymian orogenic belt, formed by the collision of the Eurasian plate with the Kolyma‐Omolon microcontinent and the granitoid intrusions (Figure 1B; [28, 89]). Published sulfur isotope data, albeit limited, show that these metasedimentary and igneous rocks are largely depleted in 34 S compared with the marine carbonates and evaporites deposited on the Siberian platform: δ 34 S values do not exceed 10‰ [90–92]. Similarly, the Kolyma River close to the Zyryanka basin has an average δ 34 S SO4 as low as −4.8‰ [88].…”

Section: Discussionmentioning

confidence: 99%

“…metasedimentary and igneous rocks are largely depleted in 34 S compared with the marine carbonates and evaporites deposited on the Siberian platform: δ 34 S values do not exceed 10‰ [90][91][92]. Similarly, the Kolyma River close to the Zyryanka basin has an average δ 34 S SO4 as low as −4.8‰ [88].…”

Section: Dissolved Sulfatementioning

confidence: 99%

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Sulfur Isotope Geochemistry of Ice‐Wedges in Yakutia, East Siberia

Jeong,

Moon,

Iwahana

et al. 2024

Permafrost & Periglacial

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Sulfur, with its highly varying stable isotope ratio and involvement in numerous biogeochemical processes, is one of the most widely used elements as an isotopic paleoenvironmental proxy, yet the sulfur isotope ratios of ice‐wedges and their insoluble fraction remain unexplored. This study first presents the sulfur isotopic compositions of soluble sulfate, particulate organic matter (POM), and lithic particles recovered from East Siberian ice‐wedges. Soluble sulfate, primarily representing atmospheric sulfate deposition, shows comparable sulfur isotope ranges in Zyryanka and Batagay, while in Central Yakutia, ice‐wedge sulfate is more enriched in 34S, consistent with the orogenic and cratonic terranes in East Siberia. Given the wedge growth during the inland winter, it is likely that sulfate aerosols were derived mainly from erosion and weathering of regional basement rocks rather than from sea salt spray or biogenic emissions. Within individual ice‐wedges, however, the sulfur isotopic composition of soluble sulfate varies by as much as 7‰, possibly reflecting changes in the relative contributions of sulfur‐isotopically distinct source regions. Beyond the origin of sulfate, greater sulfur isotope fractionations between POM and sulfate during the last glaciation suggest that sulfate may have been anaerobically reduced to sulfide and vice versa in the adjacent root zone.

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Section: Potential As a Temporal Proxy For Past Environmental Changementioning

confidence: 64%

Section: Discussionmentioning

confidence: 99%

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Sulfur Isotope Geochemistry of Ice‐Wedges in Yakutia, East Siberia

Jeong,

Moon,

Iwahana

et al. 2024

Permafrost & Periglacial

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“…It can be seen from Figure 8 that 4 to 0.4 vol% of the carbonate remains during decarbonation of the initial sedimentary carbonate. Such an effect is regularly observed during the interaction of basaltic melts with carbonates derived from host rocks (e.g., Dubinina et al, 2019;Nikiforov et al, 2021;Nosova et al, 2021).…”

Section: Origin Of Ferrocarbonatesmentioning

confidence: 91%

Mechanism of carbonate assimilation by intraplate basaltic magma and liquid immiscibility: example of Wangtian’e volcano (Changbaishan volcanic area, NE China)

Andreeva,

Dubinina,

Andreeva

et al. 2023

Front. Earth Sci.

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The balance of CO2 during abundant basaltic magma production is an important factor of volcanic hazards and climate. In particular, this can be explored based on CO2-rich mantle-derived magmas or carbonate assimilation by basaltic melts. To reconstruct the origin of Fe-rich carbonates hosted by Cenozoic basalts from Wangtian’e volcano (northeast China), we studied elemental compositions of melt, crystalline and fluid inclusions in magmatic minerals as well as the oxygen and carbon isotope compositions of the plagioclase and carbonates from basalts. The crystallization of basaltic magmas occurred in shallow chamber (∼4 km) at temperatures of 1,180°C–1,200°C and a pressure of 0.1 ± 0.01 GPa. Stable Fe-rich carbonates occur in the Wangtian’e tholeiite basalts as groundmass minerals, crystalline inclusions in plagioclase and globules in melt inclusions, which suggests that they crystallized from a ferrocarbonate melt. The values of δ18О and δ13С in the minerals analyzed by laser fluorination method are in line with the sedimentary source of Fe-rich carbonates, indicating assimilation and partial decomposition of carbonate phases. The parent ferrocarbonate melt could be produced during interactions between the basaltic magma and the crustal marbles. The phase diagram and thermodynamic calculations show that the ferrocarbonate melt is stable at a temperature of 1,200°C and a pressure of 0.1 GPa. Our thermodynamic calculations show that carbonate melt containing 73 wt% FeCO3, 24 wt% MgCO3 and 3 wt% CaCO3 is in thermodynamic equilibrium with silicate melt in agreement with our natural observations. The proposed mechanism is crustal carbonate sediment assimilation by the intraplate basaltic magma resulting in the melt immiscibility, production of the ferrocarbonate melt and the following Fe-rich carbonate mineral crystallization during magma residence and cooling.

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First Data on Isotopy and Mineralogical Features Ores Kumirnogo Silver Deposit (Russia, Primorsky Region)

Ивин

Medvedev

2021

IOP Conf. Ser.: Earth Environ. Sci.

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Lockated in the noth part of Primorsky region, the Kumirnoe silver deposit is very interesting object from a geological point of view. Data about isotopic mineralogical characteristics of its ore mineralization was first presented in this essay. More than 80 ore bodies are known at the deposit. They mostly contain quartz, hydromica, sericite, adularia, chlorite, montmorillonite and kaolinite. Ore mineralization is represented by silver-bearing minerals: acanthite, pyrirargyrite, polybasite, stephanite, freibergite, selenium-containing aguilarite and eletrum. The obtained isotope data indicate that sulfur composition is close to meteorite standard, this is indicated by the narrow positive interval of its sulfur ratios (2,0-2,8‰). It gives the reason to assume that homogeneous hydrothermal ore-forming solutions participated in its formation. Its comparison with isotopic data of gold-silver deposits located in the continental marginal volcano-plutonic belts (Ducat, Mnogovershinnoe, Sergeevskoye) shows that the formation of the Kumirnoe deposit was at the same time: Cretaceous- Paleogene, it’s possible it was under similar geological conditions. This is confirmed by the age data obtained by us earlier for Kumirnoe deposit (it matches Cretaceous- Paleogene).

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Isotope (δ34S, δ13C, δ18O) Compositions of Disseminated Sulfide Mineralization in Igneous Rocks of the Dukat Ore Deposit (Northeastern Russia)

Cited by 7 publications

References 19 publications

Sulfur Isotope Geochemistry of Ice‐Wedges in Yakutia, East Siberia

Sulfur Isotope Geochemistry of Ice‐Wedges in Yakutia, East Siberia

Mechanism of carbonate assimilation by intraplate basaltic magma and liquid immiscibility: example of Wangtian’e volcano (Changbaishan volcanic area, NE China)

First Data on Isotopy and Mineralogical Features Ores Kumirnogo Silver Deposit (Russia, Primorsky Region)

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