Journal/NDM57 2023 eng

New Data on Minerals, Volume 57, 2023

DEADLINES FOR ARTICLES

Issue 1 - March 31, 2023
Issue 2 - May 31, 2023
Issue 3 - August 31, 2023
Issue 4 - November 30, 2023

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

Plechov P. Yu., Ushakova S.A., Shcherbakov V.D. Mineralogy and Genesis of Karites of the Murun Complex, p. 5-13

We studied mineralogy of the karite sample from Murun alkaline complex. Karite belongs to the silexites group and has so far been one of the few rocks of this family whose igneous genesis has not been questioned. The studied rock consists of quartz (73 vol. %), aegirine (4 vol. %), orthoclase (23 vol. %), and a number of accessory minerals, which are typical for fenites (narsarsukite, steacyite-turkestanite, delyite, etc.). Large euhedral quartz crystals with numerous oriented aegirine ingrowths create a formal resemblance to the porphyritic texture of effusive rocks, however, formation conditions of rock-forming minerals correspond to low temperature (<400℃). Possibly the rock was formed during the impregnation of a silica-rich fluid through a grorudite or aegirinite substrate. The study of karite of the Murun complex did not reveal any sign of the igneous genesis of these rocks. It can be concluded that karites, like many other representatives of the silexites family, are not magmatic, but of hydrothermal-metasomatic origin.
Keywords: Murun alkaline complex, silexites, quartz, steaciite, turkestanite, narsarsukite. читать далее...
Электронные приложения к статье : Plechov2023_Suppl.xlsx

Rumyantseva N.А., Berezin А.V., Vanshtein B.G., Skublov S.G. Clinopyroxene composition as an indicator of the conditions of crystallization of gabbroids from the Shaka Ridge (South Atlantic), p. 14-23

The paper presents the results of geochemical research (major, trace and rare earth elements) for clinopyroxene grains extracted from gabbro-type rocks of the Shaka Ridge, South Atlantic. The clinopyroxene belongs to the Ca–Mg–Fe type and is characterized by a smooth change in chemical composition from the center to the edge of the grains, expressed in a decrease in the magnesia value of Mg#, an increase in the total REE concentration and a more distinct manifestation of the negative Eu-anomaly. Based on the geochemical and morphological features of the grains, it is concluded that fractional crystallization significantly affects the composition of clinopyroxene during its formation. The estimation of P-T parameters by several methods allowed us to designate a narrow range of temperatures (1225–970 °C) and pressures (3–1 kbar) at which clinopyroxene crystallized.
Keywords: clinopyroxene, geochemistry, trace elements, REE, Shaka Ridge, South Atlantic. читать далее...

Spiridonov E.M., Devnina N.N., Murashko M.N., Korotaeva N.N., Kulikova I.M. Tungstenite and molybdenite as destruction products of ovamboite Cu20(Cu,Fe)6W2(Ge,As)6S32, tungsten-rich germanite, and maikainite Cu₂₀(Cu,Fe)₆Mo₂(Ge,As)₆S₃₂ of the Tsumeb deposit in Namibia, p. 24-29

The Vendian volcanogenic BSV type Ag-Zn-Cu-Pb Tsumeb deposit (Namibia, SW Africa) is uniquely rich in germanium minerals. Tsumeb hypothermal mineralization includes topaz, fluorapatite, quartz, K-feldspar, phlogopite, high chalcocite, pyrite, complex Ge sulphides enriched in W and Mo, namely, ovamboite Cu₂₀(Cu,Fe)₆W₂(Ge,As)₆S₃₂ and maikainite Cu₂₀(Cu,Fe)₆Мо₂(Ge,As)₆S₃₂; gallite – sphalerite – chalcopyrite solid solutions; complex Sn sulphides, such as stannoidite, and others. Tsumeb mesothermal mineralization includes chalcopyrite, chalcopyrite-bornite solid solution, bornite, high chalcocite, galena, Ga-rich sphalerite, tennantite, W-rich germanite, Zn-rich gallite, quartz, muscovite, dolomite, mawsonite, and others. Tsumeb epithermal mineralization is developed among brecciated early mineral aggregates. The parameters of formation of epithermal mineralization are T 240 – < 80 °C, solutions salinity is 6–12 wt.% equiv. NaCl. Galena, low-iron Cd sphalerite, tennantite, pyrite, low chalcocite, dolomite, and marcasite are abundant. Nonzonal, W-poor germanite, gallite, and renierite are widely developed. There are destruction products of high-temperature Ge sulphides enriched in W and Mo. The destruction products of ovamboite and W-rich germanite are abundant microveinlets and small (up to 15 µm) nests of tungstenite, low chalcocite, betechtinite, siderite, and calvertite. The destruction products of maikainite are intergrowths of the smallest molybdenite plates with low chalcocite and betechtinite. Tungstenite contains < 0.3 wt.% of Mo, molybdenite ~ 0.3 wt.% of W, which indicates their low formation temperature. The probable decomposition reaction of ovamboite (the mineral composition is close to real): Cu₂₄Fe₂W₂Ge₄As₂S₃₂ + 2 Cu₂S + 2 Pb sol. → WS₂ (tungstenite) + Cu₈WS₆ (calvertite) + Cu₂₀FePb₂S₁₅ (betechtinite) + FeS₂ (pyrite) + 4 Ge sol. + As₂S₃ sol. + 6 S sol. The probable decomposition reaction of maikainite (the mineral composition is close to real): Cu₂₄Fe₂Мо₂Ge₄As₂S₃₂ + 2 Pb sol. → 2 МоS₂ (molybdenite) + Cu₂₀FePb₂S₁₅ (betechtinite) + 2 Cu₂S (low chalcocite) + FeS₂ (pyrite) + 4 Ge sol. + 2 As₂S₃ sol.+ 3 S sol.
Keywords: tungstenite, molybdenite, calvertite, betechtinite, ovamboite, maikainite, W-rich germanite, the Tsumeb volcanogenic deposit BSV type. читать далее...

Issue 2

Borisova E.A. Margarita Ivanovna Novgorodova – director of the Fersman Mineralogical Museum (1996–2010), p. 31-41

In the paper the activity of Professor Margarita Ivanovna Novgorodova is presented. She was a director of the Fersman Mineralogical Museum in the country’s difficult time and managed not only to save the Museum but also essentially developed the scientific and museum activities.
Keywords: Fersman Mineralogical Museum, collection of minerals, museum exposition, M.I. Novgorodova. читать далее...
Электронные приложения к статье : Novgorodova2023_Supplementary.pdf

Generalov M.E., Agakhanov A.A. Precios Grains of History. PGE Minerals from Specimens of A.V. Stenbock-Fermor, p. 42-51

In 1907 specimens from placers and ore veins of the Upper Iset mining district of the Urals came to the Museum's collection from Count A.V. Stenbock-Fermor. By themselves, these materials are evidence of the long mining history of the Urals, the participation of various Russian social strata up to the highest aristocracy in mining industry. Comparison of historical and geographical data made it possible to clarify the localities of samples. The analysis of the PGE minerals showed that they are mainly represented by Fe-Pt and Os-Ir-Ru alloys. Despite the fact that in the museum the samples of Stenbock-Fermor platinoids are recorded as "osmic iridium", a very common mineral in this collection is ruthenium. Osmium prevails, single grains of osmic and platinum iridium found. Irarsite, laurite, Ir-Fe-Ni alloys also present in the association.
Keywords: Mineralogical Museum, collection, placers, Ural, minerals, PGE, history. читать далее...

Sokolova E.L., Pekova N.A. Agates of Idzhevan (Armenia) in the collection of the Fersman Mineralogical museum RAS, p. 52-61

Several deposits of the high quality agates are located in the Idzhevan district of the north-east of Armenia. The main agate-bearing rocks are metamorphosed pyroxene porphyrites of the upper Cretaceous volcanogenic-sedimentary complex. Agates in volcanogenic rocks are formed under influence of low-grade metamorphism processes in conditions of the Zeolite facies. Idzhevan agates and chalcedonies are represented rather sparsely in the museum collection – by 46 specimens. Almost half of them are mossagates, containing abundant inclusions of celadonite. Several specimens from V.I. Stepanov's collection “A”, included into the main museum's fund, are interesting because of their composition and genesis. Agates, containing blue to amethyst-purple chalcedony and motley “bottom” jasper are especially attractive. There are several specimens of concentric-zonal agates consisting of grey chalcedony, often with quartzine, quartz/amethyst, calcite, goethite in the collection. There are also 4 landscape Idzhevan agate miniatures by stone artist A.N. Korobkov. Agates/chalcedonies from any other locations of Armenia are represented by only 6 specimens. Mineral diversity of Idzhevan agates is underrepresented in the museum collection. Variegated landscape and “carpet” agates are almost completely absent. The museum hopes that the collections will be filled with such kind of specimens from interested researchers, collectors and stone amateurs.
Keywords: Idzhevan deposits of agates, low-grade metamorphism, agate/chalcedony genesis in metavolcanites, Armenian agates collection of the museum, mossagate, chalcedony, celadonite, quartzine, calcite, goethite, clinoptilolite, landscape agate. читать далее...

Issue 3

Gritsenko Yu.D., Ogorodova L.P., Vigasina M.F., Dedushenko S.K., Vyatkin S.V., Melchakova L.V., Ksenofontov D.A. Physicochemical characteristics of iron-bearing lazulite from granitic pegmatites of the Patom Highlands, Irkutsk Region, p. 63-73

ILazulite of the composition (Mg_0.87Fe²⁺_0.13Ni_0.01Sr_0.01)(Al_1.97Fe³⁺_0.03)(PO₄)_2.03(OH)_1.95 has been studied by thermal and electron probe analysis, powder X-ray diffraction, IR, Raman, ESR and Mössbauer spectroscopy. The enthalpy of formation of lazulite (Mg_0.9Fe²⁺_0.1)Al_2.0(PO₄)_2.0(OH)_2.0 from the elements ∆_fH⁰(298.15 K)= − 4472.5 ± 3.1 kJ/mol. The value of its absolute entropy S0(298.15 K) = 207 ± 3 J/(mol·K) was estimated, the entropy of formation ∆_fS⁰(298.15 K) = −1120 ± 3J/(mol·K) and the Gibbs energy of formation from the elements ∆_fG⁰(298.15 K) = −4138.7 ± 3.2 kJ/mol. The values of the enthalpy and Gibbs energy of formation from the elements of the magnesium member of the isomorphic series lazulite – scorzalite of the composition MgAl_2.0(PO₄)_2.0(OH)_2.0 are estimated as −4492.7 ± 3.1 and −4157.6 ± 3.2 kJ/mol, respectively.
Keywords: lazulite, X-ray powder diffraction, IR spectroscopy, Raman spectroscopy, ESR spectroscopy, Mössbauer spectroscopy, thermal analysis, Calve microcalorimetry, enthalpy, entropy, Gibbs energy. читать далее...

Vyatkin S.V., Garanin V.K., Kriulina G.Y., Вardukhinov L.D. The distribution of diamonds by the content of A-centers as a criterion for the polygenicity of the deposit, p. 74-80

The concentration of A centers in diamond crystals (two nitrogen atoms isomorphically replacing carbon in adjacent positions of the structure) varies widely, but the distribution of this value for a statistically significant number of samples carries genetic information. The position of the distribution maximum is determined by the growth conditions and aggregation processes of nitrogen centers in the crystal structure after it, i.e. the parameters of post-growth annealing of crystals. The expansion and complication of the maximum may indicate a multi-stage process of formation of the indigenous diamond-bearing body; the presence of several maxima in the case of a placer deposit indicates the presence of diamonds from different indigenous sources in the placer, the polygenicity of its formation.
Keywords: diamond, typomorphism, IR, Anabar, placers. читать далее...

Spiridonov E.M., Murashko M.N., Yapaskurt V.O., Kulikova I.M., Korotaeva N.N. Germanocolusite and Colusite of Volcanogenic Sulphide-Polimetal Tsumeb Deposit in Namibia, p. 81-90

The richest volcanogenic BSM (sulfide-polymetal) Ag-Zn-Cu-Pb Tsumeb deposit is the largest accumulation of Ge ores and minerals. According to the data of Hans Schneiderhöhn, Tsumeb is a magmatic hydrothermal replacement deposit. Tsumeb ores include hypothermal, mesothermal and epithermal mineralization. Epithermal mineralization develops throughout the deposit, including dolomites and carbonaceous dolomites along the contacts of massive sulfide ores lodes. The mineralization appeared at T 240 – <80 °C. Galena, low iron Cd sphalerite, tennantite, pyrite, low chalcocite, dolomite, and marcasite are abundant. Azonal germanite and gallite are common with no connection with minerals of the colusite group. Germanocolusite Cu₂₀(Cu,Zn,Fe)₆V₂(Ge,As,Ga)₆S₃₂ and germanium-bearing colusite Cu₂₀(Cu,Fe,Zn)₆V₂(As,Ge)₆S₃₂ develop in ores replaced marine carbonaceous dolomites enriched in vanadium. Germanium-contained colusite develops in aggregates of galena and Zn tennantite and associates with anatase, chalcopyrite, graphitoid, and picrophengite. Germanocolusite develops in aggregates of galena and tennantite and associates with anatase, chalcopyrite, graphitoid, and Mg phengite. The composition of the colusite – germanocolusite series is normally continuous.
Keywords: volcanogenic BSM (sulfide-polymetal) Tsumeb deposit, epithermal mineralization, germanocolusite, germanium-bearing colusite. читать далее...

Issue 4

Plechov P.Yu., Konovalova K.A. State of the meteorite collection of the Mineralogical Museum of RAS, p. 92-102

This paper presents an extensive review of the meteorite collection preserved at the Fersman Mineralogical Museum of the Russian Academy of Sciences, highlighting significant findings from a scientific revision of the collection. The collection, with a rich and complex history, includes meteorites and impactites, some of which date back to the 18th century. Recent efforts have revitalized the collection, emphasizing the importance of meteoritic material in mineralogical studies, as over hundred minerals were first discovered in meteorites. Currently, the collection consists of 247 samples, including 44 registration masses of newly discovered meteorites. The paper discusses the representativeness of the collection for exhibition and research purposes, detailing the variety of meteoritic minerals and their implications for scientific study. It delves into the challenges and future directions for enhancing the collection, including the acquisition of rare meteorite types and continuous research and registration of new meteoritic material. The paper also sheds light on the museum's approach to expanding and maintaining the collection, through active research collaborations and participation in meteorite expeditions. This study contributes significantly to understanding the diversity and scientific value of meteoritic collections in museums, underscoring their role in advancing mineralogical knowledge.
Keywords: meteorite collection, pallasites, chondrites, carbonaceous chondrites, mesosiderites, achondrites, Fersman Mineralogical Museum of RAS. читать далее...

Pavlova T.M. Valeria Alexandrovna Kornetova, p. 103-109

In 2023, the 100th anniversary of the birth of Valeria Alexandrovna Kornetova, a well-known Russian mineralogist, researcher of rare-metal granite pegmatites, an authoritative specialist in the history of the development of geological sciences and museum business in Russia, an experienced diagnostician of precious and ornamental stones, was celebrated.
Keywords: V.A. Kornetova, rare-metal granite pegmatites, Fersman Mineralogical Museum of RAS. читать далее...

Plechov P.Yu., Shchekleina M.D., Dymshits A.M. Modelling of Quartz-Melt equilibrium in simple and complex silicate systems, p. 110-118

We propose the simple quartz-melt equilibrium model that takes into account chemical composition and water saturation of the melt as well as lithostatic pressure. The model is built on the basis of an empirical equation describing the pseudoliquidus surface and calibrated against a representative experiments data set. The resulting equation for temperature calculation is:
T(℃) = 1863.34 – 3589.3(Al) – 3444.7(Ti) – 1320.2(Fe_tot) – 1177.9(Mg) – 132.8(Ca) – 2589.1(Na) – 3249.4(K) – 15.722 √(Al·(Na+K)) – 342.7(X_H2O) + 197.5(P),
where Al, Ti, Fe_tot, Mg, Ca, Na, K are the atomic fractions of cations, X_H2O is the water saturation of the melt at a given temperature and pressure, P is the pressure in GPa.
The resulting model satisfactorily describes the equilibrium of quartz and melt in both simple and complex natural systems over a wide range of pressure and temperature. Fluorine and chlorine were not taken into account while the equation calibrated, so estimations of temperature for F and Cl containing systems should be considered with caution. An appendix with calculations is attached to the article for convenient free use by petrologists and mineralogists.
Keywords: quartz, melt, temperature, equilibrium. читать далее...
Электронные приложения к статье : 2023_Plechov_3_2023_4_supl.xlsx

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