Journal/NDM60 2026 eng — различия между версиями
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{{NDM_article | {{NDM_article | ||
| − | | Авторы = | + | | Авторы = Strelnikov M.V., Khanin D.A., Yapaskurt V.O., Britvin S.N., Pletnev P.A., Yanson S.Yu., Pekov I.V. |
| Название = New gold-gachingite-selenodantopaite mineral association in ores of the Ozernovskoe deposit (Kamchatka, Russia), p. 19-31 | | Название = New gold-gachingite-selenodantopaite mineral association in ores of the Ozernovskoe deposit (Kamchatka, Russia), p. 19-31 | ||
| − | | Аннотация = A new gold-gachingite-selenodantopaite mineral association was discovered in the tellurium-rich dickite-quartz veins of the Ozernovskoe deposit (Kamchatka). For both gachingite Au(Te<sub>1-x</sub>Se<sub>x</sub>) and selenodantopaite Ag5Bi13Se22 this is the second locality in the world. Powder X-ray diffraction data were obtained for both minerals for the first time. Unit-cell parameters: gachingite: <i>a</i> = 7.557(7), <i>b</i> = 5.740(6), <i>c</i> = 8.940(6) Å, <i>V</i> = 387.7(4) Å<sup>3</sup>; selenodantopaite: <i>a</i> = 13.78(2), <i>b</i> = 4.161(8), <i>c</i> = 19.51(4) Å, β = 106.28(13)°, <i>V</i> = 1074(2) Å<sup>3</sup>. Gachingite and selenodantopaite form inclusions in quartz and are associated with baryte, hypogene gold, bohdanowiczite and paraguanajuatite. Size of gachingite grains is 5–80 μm; its chemical composition is Au(Te<sub>0.67</sub>Se<sub>0.33</sub>)–Au(Se<sub>0.51</sub>Te<sub>0.49</sub>). A potentially new mineral, Se-dominant analogue of gachingite with a composition Au(Se<sub>0.60</sub>Te<sub>0.40</sub>), was found. Selenodantopaite (crystals up to 0.3 mm) has a composition similar to the endmember | + | | Аннотация = A new gold-gachingite-selenodantopaite mineral association was discovered in the tellurium-rich dickite-quartz veins of the Ozernovskoe deposit (Kamchatka). For both gachingite Au(Te<sub>1-x</sub>Se<sub>x</sub>) and selenodantopaite Ag5Bi13Se22 this is the second locality in the world. Powder X-ray diffraction data were obtained for both minerals for the first time. Unit-cell parameters: gachingite: <i>a</i> = 7.557(7), <i>b</i> = 5.740(6), <i>c</i> = 8.940(6) Å, <i>V</i> = 387.7(4) Å<sup>3</sup>; selenodantopaite: <i>a</i> = 13.78(2), <i>b</i> = 4.161(8), <i>c</i> = 19.51(4) Å, β = 106.28(13)°, <i>V</i> = 1074(2) Å<sup>3</sup>. Gachingite and selenodantopaite form inclusions in quartz and are associated with baryte, hypogene gold, bohdanowiczite and paraguanajuatite. Size of gachingite grains is 5–80 μm; its chemical composition is Au(Te<sub>0.67</sub>Se<sub>0.33</sub>)–Au(Se<sub>0.51</sub>Te<sub>0.49</sub>). A potentially new mineral, Se-dominant analogue of gachingite with a composition Au(Se<sub>0.60</sub>Te<sub>0.40</sub>), was found. Selenodantopaite (crystals up to 0.3 mm) has a composition similar to the endmember Ag<sub>5</sub>Bi<sub>13</sub>Se<sub>22</sub>. This, together with the literature data, allows to consider the dantopaite Ag<sub>5</sub>Bi<sub>13</sub>S<sub>22</sub> – selendantopaite solid solution to be complete. Selenodantopaite is one of the main mineral forms of Ag in the Ozernovskoe deposit. Native gold is divided into two morphogenetic types: distinctly crystalline hypogene and "mustard" supergene. The rich mineralization of gachingite and maletoyvayamite Au<sub>3</sub>Se<sub>4</sub>Te<sub>6</sub> in the Ozernovskoe deposit show that Au selenotellurides are more widespread than previously thought and can form ores conditional for mining. |
<br> | <br> | ||
'''Keywords:''' gachingite, selenodantopaite, gold selenotullerides, mineralogy of epithermal deposits, Ozernovskoe deposit, Kamchatka | '''Keywords:''' gachingite, selenodantopaite, gold selenotullerides, mineralogy of epithermal deposits, Ozernovskoe deposit, Kamchatka | ||
| Файл = Strelnikov_et_al_2_2026-1.pdf | | Файл = Strelnikov_et_al_2_2026-1.pdf | ||
| + | | Приложения = | ||
| + | }} | ||
| + | {{NDM_article | ||
| + | | Авторы = Plechov P.Yu., Zabludovskaya A.V., Shcherbakov V.D., Konovalova K.A. | ||
| + | | Название = Solid solution between diopside and kosmochlor in metasomatically altered ultramafic rocks of the Inagli complex (Yakutia), p. 32-40 | ||
| + | | Аннотация = The paper reports the first description of a complete solid solution series between diopside and kosmochlor (CaMgSi₂O₆–NaCrSi₂O₆) in metasomatically altered ultramafic rocks of the Inagli ring complex (Yakutia). Kosmochlor occurs in zones of recrystallized clinopyroxene directly associated with relict Cr-spinel grains, indicating its secondary, metasomatic origin. The kosmochlor component content ranges from 0.1 to 94 mol.%, exhibiting a systematic correlation between Cr2O3 and Na2O concentrations and an inverse relationship with CaO and MgO. Radial zoning is clearly evident in backscattered electron (BSE) images and element distribution maps, with chromium concentration peaking near chromite grains and gradually diminishing outward. Raman spectroscopy confirms the crystallochemical identity of the dark green clinopyroxene varieties as kosmochlor. Associated minerals (richterite, phyllosilicates, and dolomite), together with brecciated texture, indicate the involvement of a carbonate-sulfate fluid during metasomatic alteration. The data suggest that kosmochlor formed through localized interaction between this fluid and primary clinopyroxene, with chromium likely sourced from partially dissolved chromite. This discovery enhances the mineralogical characterization of the unique Inagli complex, renowned for its platinum placers and gem-quality chromian diopside, and expands current understanding of the geochemical conditions required for Cr–Na pyroxene formation in alkaline ultramafic rocks. | ||
| + | <br> | ||
| + | '''Keywords:''' kosmochlor, chromian diopside, Inagli complex, leopardite, chromite. | ||
| + | | Файл = Plechov_et_al_3_2026-1.pdf | ||
| Приложения = | | Приложения = | ||
}} | }} | ||
Текущая версия на 16:31, 23 апреля 2026
New Data on Minerals, Volume 60, 2026
DEADLINES FOR ARTICLES
Issue 1 - March 31, 2026
Issue 2 - May 31, 2026
Issue 3 - August 31, 2026
Issue 4 - November 30, 2026
Editorial Board
Editor in Chief:
Plechov P.Yu. -D.Sc. in Geology and Mineralogy, Professor
Members of Editorial Board:
Pekov I.V. - Corresponding Member of the Russian Academy of Sciences
Garanin V.K. - D.Sc. in Geology and Mineralogy, Professor
Borutsky B.E. - D.Sc. in Geology and Mineralogy
Spiridonov B.E. - D.Sc. in Geology and Mineralogy
Chukanov N.V. - D.Sc. in Physical and Mathematical Sciences
Kamenetsky V.S. - Professor (University of Tasmania)
Nenasheva S.N. - PhD in Geology and Mineralogy
Matvienko E.N. - PhD in Geology and Mineralogy
Generalov M.E. - PhD in Geology and Mineralogy
Pautov L.A. - Senior Researcher
Layout Designer
Kronrod E.V. - PhD in Chemistry
Content
Issue 1
Gritsenko Yu.D., Ogorodova L.P., Vyatkin S.V., Vigasina M.F., Plechov P.Yu., Kalinyuk D.A., Ksenofontov D.A., Melchakova L.V.
Investigation of variscite polytypes from the Sary-Sai occurrence, Ulytau region, Kazakhstan, p. 5-18
A physicochemical study of variscite polytypes AlPO4∙2H2O from the Sary-Sai deposit (Ulytau region, Kazakhstan) was conducted using powder X-ray diffraction, electron probe microanalysis, IR, Raman, EPR spectroscopy, and thermogravimetry. The parameters of the rhombic unit cell were determined: for the variscite-1O “Lucin-type” polytype a = 9.8218(17) Å, b = 8.5612(10) Å, c = 9.6278(18) Å and for the variscite-2O “Messbach-type” polytype: a = 9.8971(18) Å, b = 9.664(3) Å, c = 17.184(4) Å. The enthalpy of formation of variscite-2O from elements was determined by high-temperature melt dissolution calorimetry on a Calvet microcalorimeter (–2361.0 ± 4.2 kJ/mol). Its standard entropy was estimated, and its Gibbs energy of formation was calculated (169.5 J/(mol K) and –2129.4 ± 4.2 kJ/mol, respectively).
Keywords: Messbach-type variscite-2O, Lucin-type variscite-1O, polytypes, Sary-Sai occurrence, IR spectroscopy, Raman spectroscopy, EPR spectroscopy, thermogravimetry, Calvet microcalorimetry, enthalpy of formation, entropy, Gibbs energy. читать далее...
Strelnikov M.V., Khanin D.A., Yapaskurt V.O., Britvin S.N., Pletnev P.A., Yanson S.Yu., Pekov I.V.
New gold-gachingite-selenodantopaite mineral association in ores of the Ozernovskoe deposit (Kamchatka, Russia), p. 19-31
A new gold-gachingite-selenodantopaite mineral association was discovered in the tellurium-rich dickite-quartz veins of the Ozernovskoe deposit (Kamchatka). For both gachingite Au(Te1-xSex) and selenodantopaite Ag5Bi13Se22 this is the second locality in the world. Powder X-ray diffraction data were obtained for both minerals for the first time. Unit-cell parameters: gachingite: a = 7.557(7), b = 5.740(6), c = 8.940(6) Å, V = 387.7(4) Å3; selenodantopaite: a = 13.78(2), b = 4.161(8), c = 19.51(4) Å, β = 106.28(13)°, V = 1074(2) Å3. Gachingite and selenodantopaite form inclusions in quartz and are associated with baryte, hypogene gold, bohdanowiczite and paraguanajuatite. Size of gachingite grains is 5–80 μm; its chemical composition is Au(Te0.67Se0.33)–Au(Se0.51Te0.49). A potentially new mineral, Se-dominant analogue of gachingite with a composition Au(Se0.60Te0.40), was found. Selenodantopaite (crystals up to 0.3 mm) has a composition similar to the endmember Ag5Bi13Se22. This, together with the literature data, allows to consider the dantopaite Ag5Bi13S22 – selendantopaite solid solution to be complete. Selenodantopaite is one of the main mineral forms of Ag in the Ozernovskoe deposit. Native gold is divided into two morphogenetic types: distinctly crystalline hypogene and "mustard" supergene. The rich mineralization of gachingite and maletoyvayamite Au3Se4Te6 in the Ozernovskoe deposit show that Au selenotellurides are more widespread than previously thought and can form ores conditional for mining.
Keywords: gachingite, selenodantopaite, gold selenotullerides, mineralogy of epithermal deposits, Ozernovskoe deposit, Kamchatka читать далее...
Plechov P.Yu., Zabludovskaya A.V., Shcherbakov V.D., Konovalova K.A.
Solid solution between diopside and kosmochlor in metasomatically altered ultramafic rocks of the Inagli complex (Yakutia), p. 32-40
The paper reports the first description of a complete solid solution series between diopside and kosmochlor (CaMgSi₂O₆–NaCrSi₂O₆) in metasomatically altered ultramafic rocks of the Inagli ring complex (Yakutia). Kosmochlor occurs in zones of recrystallized clinopyroxene directly associated with relict Cr-spinel grains, indicating its secondary, metasomatic origin. The kosmochlor component content ranges from 0.1 to 94 mol.%, exhibiting a systematic correlation between Cr2O3 and Na2O concentrations and an inverse relationship with CaO and MgO. Radial zoning is clearly evident in backscattered electron (BSE) images and element distribution maps, with chromium concentration peaking near chromite grains and gradually diminishing outward. Raman spectroscopy confirms the crystallochemical identity of the dark green clinopyroxene varieties as kosmochlor. Associated minerals (richterite, phyllosilicates, and dolomite), together with brecciated texture, indicate the involvement of a carbonate-sulfate fluid during metasomatic alteration. The data suggest that kosmochlor formed through localized interaction between this fluid and primary clinopyroxene, with chromium likely sourced from partially dissolved chromite. This discovery enhances the mineralogical characterization of the unique Inagli complex, renowned for its platinum placers and gem-quality chromian diopside, and expands current understanding of the geochemical conditions required for Cr–Na pyroxene formation in alkaline ultramafic rocks.
Keywords: kosmochlor, chromian diopside, Inagli complex, leopardite, chromite. читать далее...
