Geochemistry International最新文献

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

Nonspecific Organic Compounds and Their Role in the Formation of Organic Matter in Bottom Sediments and Soils from the Catchment Areas of Streams in Voronezh Heights (Khabarovsk) 沃罗涅日高地（哈巴罗夫斯克）河流集水区底部沉积物和土壤中非特异性有机化合物及其在有机质形成中的作用

IF 0.9 4区地球科学

Geochemistry International Pub Date : 2026-08-03 DOI: 10.1134/S0016702926600240

L. A. Garetova, N. K. Fisher, E. L. Imranova

{"title":"Nonspecific Organic Compounds and Their Role in the Formation of Organic Matter in Bottom Sediments and Soils from the Catchment Areas of Streams in Voronezh Heights (Khabarovsk)","authors":"L. A. Garetova, N. K. Fisher, E. L. Imranova","doi":"10.1134/S0016702926600240","DOIUrl":"10.1134/S0016702926600240","url":null,"abstract":"This paper presents data on the pigment composition, organic carbon (Corg) content, and molecular composition of n-alkanes in the bottom sediments and adjacent soils of streams in Voronezh Heights (Khabarovsk). The Corg (1.85–25.34%) and total phytopigment (10.55–212.93 μg/g) of the bottom sediments varied significantly and decreased from silt to sand. The influence of primary production on the formation of organic matter in the stream sediments is confirmed by positive correlations between the contents of Corg and individual phytopigments (chl a, chl c, and carotenoids) and their total amount (τ = 0.51–0.69). The pigment inventory of the bottom sediments contains 35.1–60.1% chlorophylls. In most watercourses, blue-green algae dominate in the composition of algal communities. The Corg content in the soil of the stream catchment areas ranged from 1.75 to 5.32%, whereas the total phytopigment content varied from 11.61 to 27.97 μg/g and depended primarily on soil moisture rather than on Corg content. The fraction of carotenoids in the pigment inventory of the soil ranged from 41.48 to 70.97%. The dominance of chl c in the composition of chlorophylls (up to 100%) is consistent with the predominant development of diatoms in the soil algal community. The quantitative contributions of newly formed, biochemically altered, and total plant-derived Corg were calculated using an algorithm involving pigment indices. The agreement between pigment‑based and molecular marker‑based estimates of the fraction of primary production and the contribution of hydrobiont‑derived organic matter, respectively, allows a more reliable assessment of the input of plant‑derived organic matter into bottom sediments and soils during early diagenesis.","PeriodicalId":12781,"journal":{"name":"Geochemistry International","volume":"64 7","pages":"578 - 591"},"PeriodicalIF":0.9,"publicationDate":"2026-08-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148652116","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

Sr–Nd Isotopic Composition of the Guli Massif. Relationship between the Size of Alkaline-Carbonatite Intrusions and Their Isotopic Heterogeneity 古里地块Sr-Nd同位素组成。碱性碳酸盐岩侵入体大小与其同位素非均质性的关系

IF 0.9 4区地球科学

Geochemistry International Pub Date : 2026-08-03 DOI: 10.1134/S0016702925601482

A. R. Tskhovrebova, Yu. A. Kostitsyn, I. T. Rass

{"title":"Sr–Nd Isotopic Composition of the Guli Massif. Relationship between the Size of Alkaline-Carbonatite Intrusions and Their Isotopic Heterogeneity","authors":"A. R. Tskhovrebova, Yu. A. Kostitsyn, I. T. Rass","doi":"10.1134/S0016702925601482","DOIUrl":"10.1134/S0016702925601482","url":null,"abstract":"The paper presents data on a representative collection of rocks from the Guli Massif, the largest alkaline-ultramafic carbonatite intrusion of the Maimecha–Kotuy Province and one of the largest worldwide. The Rb–Sr and Sm–Nd isotopic systems of rocks of the various intrusive phases of the pluton were analyzed by TIMS. The samples represented a wide spectrum of rocks from olivinites and melteigite–ijolites to melanephelinites and carbonatites. The Sr and Nd initial isotopic compositions of rocks of the Guli Massif suggest that their parental melts were derived from a mantle source moderately enriched relative to the convecting mantle. These enriched isotopic signatures suggest that the source of the parental melts contained an enriched component. At the same time, the Sr and Nd isotopic ratios of the rocks display narrow variation ranges : (87Sr/86Sr)0 = 0.7031–0.7038 and εNd(250) = +3.9 to +5.4 and no systematic changes from earlier to later intrusive phases. This likely reflects the isotopic homogeneity of the magma source and a minimal contamination by the host rocks. Comparison of our data on the Guli Massif with those on other alkaline–carbonatite intrusions worldwide seems to point to relationships between the size of a magmatic body and the degree of isotopic heterogeneity of its rocks. The Guli Massif and the Khibiny and Lovozero complexes are the world’s largest alkaline-carbonatite intrusions and show the smallest dispersion of their Sr and Nd isotopic ratios, whereas smaller intrusions display a significantly wider scatter of isotopic characteristics of their rocks. It is proposed that the large magma volumes of the larger massifs maintained the stability of their composition and limited the effects of contamination on their isotopic systems.","PeriodicalId":12781,"journal":{"name":"Geochemistry International","volume":"64 7","pages":"523 - 537"},"PeriodicalIF":0.9,"publicationDate":"2026-08-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1134/S0016702925601482.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148652112","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Erratum to: Priority Polycyclic Aromatic Hydrocarbons in the Bottom Sediments of Freshwater Ecosystems: Levels, Sources, Behavior and Standardization (a Review) 淡水生态系统底部沉积物中优先多环芳烃：水平、来源、行为和标准化（综述）

IF 0.9 4区地球科学

Geochemistry International Pub Date : 2026-08-03 DOI: 10.1134/S001670292629001X

E. Yu. Konstantinova, T. M. Minkina, N. S. Kasimov

引用次数: 0

Erratum to: Geochemistry and Sr, Nd, and Pb Isotopic Composition of Early Cretaceous Volcanic Rocks of the Mendeleev Rise, Arctic Ocean 北冰洋门捷列夫隆起早白垩世火山岩地球化学及Sr、Nd、Pb同位素组成勘误

IF 0.9 4区地球科学

Geochemistry International Pub Date : 2026-08-03 DOI: 10.1134/S0016702926290021

S. G. Skolotnev, G. V. Ledneva, O. I. Okina, Yu. O. Larionova, A. V. Korniychuk

引用次数: 0