Geochemistry International最新文献

Organic Matter in the Hot Springs of the Dagi Geothermal Field, Sakhalin Island 库页岛大基地热田温泉有机质研究

IF 0.9 4区地球科学

Geochemistry International Pub Date : 2026-09-28 DOI: 10.1134/S0016702926700096

V. A. Poturay, V. V. Ershov

{"title":"Organic Matter in the Hot Springs of the Dagi Geothermal Field, Sakhalin Island","authors":"V. A. Poturay, V. V. Ershov","doi":"10.1134/S0016702926700096","DOIUrl":"10.1134/S0016702926700096","url":null,"abstract":"The paper presents original data of the authors on the composition and content of semi-volatile organic compounds in the methane-containing Cl–Na hot springs of the Dagi geothermal field (DGF) in northern Sakhalin Island. Various organic components belonging to 19 homologous series were identified in the thermal (37.4–48.3°C) and cold mineral waters using capillary gas chromatography–mass spectrometry and solid-phase extraction (SPE). The elevated total organic carbon (TOC) content is explained by the influx of organic remnants into the thermal mineral waters from peatlands, sedimentary rocks, and oil and gas reservoirs in the immediate vicinity of the DGF. The compounds are dominated by plant-derived terpenes, heteroaromatic hydrocarbons (HCs), and bacterial isoalkanes. The origin of the high-molecular-weight n-alkanes and aromatic HC is related to thermocatalytic transformation of organic remnants in the hot waters under the effect of high temperatures. Some organic compounds identified in the organic matter (OM) provide evidence of an anthropogenic impact on the DGF hot springs, as follows from the presence of anthropogenic pollution indicators (chlorinated HC, phthalates, etc.) in the dissolved organic fraction. The occurrence of phthalates is explained not only by regional pollution but also by thermogenic processes and the proximity of the field to oil and gas fields.","PeriodicalId":12781,"journal":{"name":"Geochemistry International","volume":"64 9","pages":"701 - 719"},"PeriodicalIF":0.9,"publicationDate":"2026-09-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149067921","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Standard Enthalpy of Cubic Cu2SnSe3 Formation from the Elements: Calorimetric Determination 元素生成立方Cu2SnSe3的标准焓：量热法测定

IF 0.9 4区地球科学

Geochemistry International Pub Date : 2026-09-28 DOI: 10.1134/S0016702926700084

E. A. Brichkina, E. G. Osadchii, M. V. Voronin

引用次数: 0

Trace Elements in Zooplankton and its Potential Influence on the Composition of Dispersed Sedimentary Matter in the Norwegian and Greenland Seas 挪威和格陵兰海浮游动物微量元素及其对分散沉积物组成的潜在影响

IF 0.9 4区地球科学

Geochemistry International Pub Date : 2026-09-28 DOI: 10.1134/S0016702926700114

I. A. Migdisova, L. L. Demina, A. A. Klyuvitkin, D. P. Starodymova, O. N. Lukyanova

{"title":"Trace Elements in Zooplankton and its Potential Influence on the Composition of Dispersed Sedimentary Matter in the Norwegian and Greenland Seas","authors":"I. A. Migdisova, L. L. Demina, A. A. Klyuvitkin, D. P. Starodymova, O. N. Lukyanova","doi":"10.1134/S0016702926700114","DOIUrl":"10.1134/S0016702926700114","url":null,"abstract":"The first data on the trace-element concentrations (Fe, V, Mn, Ni, Cu, Zn, As, Cd, and Ba) were obtained for the most abundant Arctic zooplankton group, copepods Calanus spp., dwelling in the Norwegian and Greenland seas. The trace elements’ spatial distribution pattern is indirectly related to the hydrological structure and environmental parameters (dissolved oxygen content, suspended particulate matter concentration, fluorescence, and turbidity). Within the frontal zones, which separate the Atlantic Water from the Arctic Water and the Arctic Water from the Polar ones, the locally elevated concentrations of most elements were observed in copepods, that could be caused by the activation of phytoplankton primary production and elevated concentrations of suspended particulate matter, the principal dietary components of heterotrophic zooplankton. Comparison of trace-element concentrations in zooplankton and dispersed sediment matter collected by the sediment trap revealed a significant enrichment of the latter in Fe, Mn, V, and Ba, as well as a depletion in Zn, As, and Cd relative to zooplankton.","PeriodicalId":12781,"journal":{"name":"Geochemistry International","volume":"64 9","pages":"733 - 749"},"PeriodicalIF":0.9,"publicationDate":"2026-09-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149067976","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Experimental Study of the Influence of Biogenic Factor on the Mechanism of Gas Formation in Sulfide-Bearing Waste of Mining Production 生物成因因素对矿山生产含硫化物废弃物产气机理影响的实验研究

IF 0.9 4区地球科学

Geochemistry International Pub Date : 2026-09-28 DOI: 10.1134/S0016702926700102

N. V. Yurkevich, S. B. Bortnikova, A. L. Makas

引用次数: 0

Geochemistry of Titanium in Lake Sediments of the Russian Far East 俄罗斯远东地区湖泊沉积物中钛的地球化学特征

IF 0.9 4区地球科学

Geochemistry International Pub Date : 2026-09-02 DOI: 10.1134/S0016702926700059

P. S. Minyuk, D. K. Pozhidaeva

引用次数: 0

Geochemistry of Low-Temperature Vapor–Gas Flows from Anthropogenic Materials 人为物质低温蒸汽-气体流动的地球化学

IF 0.9 4区地球科学

Geochemistry International Pub Date : 2026-09-02 DOI: 10.1134/S0016702926700060

S. B. Bortnikova, O. L. Gaskova, T. V. Korneeva

{"title":"Geochemistry of Low-Temperature Vapor–Gas Flows from Anthropogenic Materials","authors":"S. B. Bortnikova, O. L. Gaskova, T. V. Korneeva","doi":"10.1134/S0016702926700060","DOIUrl":"10.1134/S0016702926700060","url":null,"abstract":"The paper presents data on the composition of condensate vapor–gas flows sampled in summertime on the surface of dumps of processing products of mining wastes. The data make it possible to assess the migration capacity of major and trace elements in the gas phase depending on the mineral composition of the anthropogenic materials and the physical and chemical characteristics of the water extracts (mobile fraction). The condensates of the vapor–gas mixture sampled above the surface of the tailings were analyzed for a wide range of chemical elements, including major elements (Ca, Mg, Na, K, Al, and Mn), metals (Cu, Zn, Pb, Cd, Co, Ni, and Ag), and metalloids (As and Sb). The concentrations of these elements in the condensates depend on both their contents in the solid waste and the amount of mobile (water-soluble) forms. Comparison of the ratios of geochemically related elements in the different phases led us to elucidate the mobility of the elements when they form volatile species. The data on the amounts of elements that migrate with the vapor–gas phase demonstrate that contrasting anomalies form in the near-surface layer of the atmosphere, and this is confirmed by the composition of the rainwater sampled at different times in the neighboring areas.","PeriodicalId":12781,"journal":{"name":"Geochemistry International","volume":"64 8","pages":"682 - 700"},"PeriodicalIF":0.9,"publicationDate":"2026-09-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148871792","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

90th Anniversary of the Birth of Erik Mikhailovich Galimov (July 29, 1936–November 23, 2020) 埃里克·米哈伊洛维奇·加里莫夫诞辰90周年（1936年7月29日- 2020年11月23日）

IF 0.9 4区地球科学

Geochemistry International Pub Date : 2026-09-02 DOI: 10.1134/S0016702926700023

Editorial Board of Geochemistry International

引用次数: 0

Mass-Spectrometric Investigation of Evaporation Processes and Thermodynamic Properties of Wollastonite 硅灰石蒸发过程及热力学性质的质谱研究

IF 0.9 4区地球科学

Geochemistry International Pub Date : 2026-09-02 DOI: 10.1134/S0016702926700035

S. I. Shornikov

{"title":"Mass-Spectrometric Investigation of Evaporation Processes and Thermodynamic Properties of Wollastonite","authors":"S. I. Shornikov","doi":"10.1134/S0016702926700035","DOIUrl":"10.1134/S0016702926700035","url":null,"abstract":"Evaporation of crystalline and liquid wollastonite from a molybdenum cell was studied by Knudsen effusion mass spectrometry in the temperature range 1751–2087 K. Molecular species typical of simple oxides and gaseous CaSiO3 were identified in the gas phase over wollastonite. Partial pressures of vapor species over wollastonite were determined for the first time. The determination of oxide activities in wollastonite made it possible to calculate the enthalpy and entropy of mixing: –38.92 ± 0.52 kJ/mol and 2.33 ± 0.29 J/(mol K), as well as the enthalpy of CaSiO3 melting at 1818 ± 7 K: 27.64 ± 0.57 kJ/mol. Based on this information, the mixing enthalpy and entropy in rankinite (Ca3Si2O7) were estimated in the temperature range 1600–1737 K: –42.63 ± 0.63 kJ/mol and 2.39 ± 0.35 J/(mol K), which are similar to the available thermochemical data. It was shown that redox interaction with the effusion cell material was mainly due to molecular oxygen, the amount of which decreased significantly compared with atomic oxygen in the absence of interaction. The behavior of wollastonite melt follows the patterns typical of other melts of compounds found in the refractory calcium–aluminum-rich inclusions in chondrites.","PeriodicalId":12781,"journal":{"name":"Geochemistry International","volume":"64 8","pages":"608 - 632"},"PeriodicalIF":0.9,"publicationDate":"2026-09-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148871687","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Thermochemical Study of Murmanite from the Lovosero Massif (Kola Peninsula) 科拉半岛Lovosero地块硅辉石热化学研究

IF 0.9 4区地球科学

Geochemistry International Pub Date : 2026-09-02 DOI: 10.1134/S0016702926700047

Yu. D. Gritsenko, L. P. Ogorodova, M. F. Vigasina, D. A. Kalinyuk, D. A. Ksenofontov, L. V. Melchakova

{"title":"Thermochemical Study of Murmanite from the Lovosero Massif (Kola Peninsula)","authors":"Yu. D. Gritsenko, L. P. Ogorodova, M. F. Vigasina, D. A. Kalinyuk, D. A. Ksenofontov, L. V. Melchakova","doi":"10.1134/S0016702926700047","DOIUrl":"10.1134/S0016702926700047","url":null,"abstract":"A physicochemical study of murmanite from the Alluaiv alkaline pegmatites (Lovozero Massif, Kola Peninsula) was conducted using powder X-ray diffraction, electron microprobe analysis, IR and Raman spectroscopy, and thermogravimetric analysis. The empirical formula of the studied murmanite is ({{left( {{text{N}}{{{text{a}}}_{{{text{3}}{text{.3}}}}}{text{C}}{{{text{a}}}_{{{text{0}}{text{.3}}}}}{{{text{K}}}_{{{text{0}}{text{.1}}}}}{{square }_{{{text{0}}{text{.3}}}}}} right)}_{{Sigma {text{4}}{text{.0}}}}})({{left( {{text{T}}{{{text{i}}}_{{{text{3}}{text{.1}}}}}{text{N}}{{{text{b}}}_{{{text{0}}{text{.3}}}}}{text{Z}}{{{text{r}}}_{{{text{0}}{text{.1}}}}}{text{M}}{{{text{n}}}_{{{text{0}}{text{.3}}}}}{text{Fe}}_{{0.2}}^{{2 + }}} right)}_{{Sigma {text{4}}{text{.0}}}}})({{left[ {{text{S}}{{{text{i}}}_{{text{2}}}}{{{text{O}}}_{{text{7}}}}} right]}_{{text{2}}}}{{{text{O}}}_{{text{3}}}}{{left( {{{{text{F}}}_{{{text{0}}{text{.3}}}}}{{{left( {{text{OH}}} right)}}_{{{text{0}}{text{.4}}}}}{{{text{O}}}_{{{text{0}}{text{.3}}}}}} right)}_{{Sigma {text{1}}{text{.0}}}}})⋅4.3H2O and corresponds to an intermediate member of the murmanite–calciomurmanite isomorphic series. The enthalpy of formation of the studied murmanite from elements was determined for the first time by high-temperature melt solution calorimetry on a Calvet microcalorimeter (–9788 ± 19 kJ/mol). Its standard entropy was estimated, and Gibbs energy of formation was calculated (870.4 J/(mol K) and –9015 ± 19 kJ/mol, respectively). The thermodynamic constants of the end-members of the murmanite–calciomurmanite isomorphic series were estimated.","PeriodicalId":12781,"journal":{"name":"Geochemistry International","volume":"64 8","pages":"651 - 660"},"PeriodicalIF":0.9,"publicationDate":"2026-09-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148871793","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Formation of C15 Sesquiterpanes as a Result of Thermolysis of Asphaltenes, Resins, and Acids from Weakly Transformed Oil of the Anastasievsko-Troitskoe Field (Horizon IV) Anastasievsko-Troitskoe油田弱转化油沥青质、树脂和酸热裂解形成C15倍半萜烯（地平线IV）

IF 0.9 4区地球科学

Geochemistry International Pub Date : 2026-08-03 DOI: 10.1134/S0016702925600580

O. A. Stokolos, G. N. Gordadze

引用次数: 0