Journal of Geosciences最新文献

{"title":"WinMIgob: A Windows program for magnetite-ilmenite geothermometer and oxygen barometer","authors":"F. Yavuz","doi":"10.3190/JGEOSCI.319","DOIUrl":"https://doi.org/10.3190/JGEOSCI.319","url":null,"abstract":"A Microsoft® Visual Basic software, called WinMIgob, has been developed for wet-chemical and electron-microprobe compositions of coexisting magnetite–ulvöspinel and ilmenite–hematite solid solutions to calculate the temperature (T, °C) and oxygen fugacity (fO2) conditions of magmatic and metamorphic rocks. The program allows the users to enter total of 34 input variables, including Sample No, SiO2, TiO2, Al2O3, V2O3, Cr2O3, Nb2O3, Fe2O3, FeO, MnO, NiO, ZnO, MgO, CaO, Na2O, K2O, BaO (wt. %) for each magnetite and ilmenite compositional data. WinMIgob enables to enter and load multiple magnetite and ilmenite analyses in the program’s data entry section. Alternatively, the composition of magnetite–ilmenite pairs can be typed in a blank Excel file as in the above order and then loaded into the program’s data entry screen for data processing. The ferric and ferrous iron contents from microprobe-derived total FeO (wt. %) of magnetite–ilmenite compositions are estimated by stoichiometric constraints based on three different approaches. Using the calculated multiple magnetite and ilmenite analyses, WinMIgob estimates molecular (%) and mole fractions of magnetite, uvöspinel, ilmenite and hematite amounts. The program evaluates fourteen magnetite–ilmenite geothermometers, thirteen oxygen barometers and six relative to the nickel–nickel oxide (NNO) buffer values based on the different calibrations with various calculation methods. WinMIgob also allows the users to check if their magnetite–ilmenite pairs taken from rocks are within or departure from the Bacon–Hirschmann Mg/Mn exchange equilibrium line ± 2σ level. This program generates and stores all the calculated results in the Microsoft Excel file (i.e., Output.xlsx), which can be displayed and processed by any other software for further data presentation and graphing purposes. The compiled program code is distributed as a self-extracting setup file, including a help file, test data files and graphic files, which are intended to produce a high-quality printout.","PeriodicalId":15957,"journal":{"name":"Journal of Geosciences","volume":"1 1","pages":"51-70"},"PeriodicalIF":1.4,"publicationDate":"2021-04-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41637534","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}

{"title":"Thermal behavior of uranyl selenite minerals derriksite and demesmaekerite","authors":"V. Gurzhiy, A. Izatulina, M. Krzhizhanovskaya, M. Murashko, D. Spiridonova, V. Shilovskikh, S. Krivovichev","doi":"10.3190/JGEOSCI.315","DOIUrl":"https://doi.org/10.3190/JGEOSCI.315","url":null,"abstract":"1 Institute of Earth Sciences, St. Petersburg State University, University Emb. 7/9, St. Petersburg, 199034, Russian Federation; vladislav.gurzhiy@spbu.ru, vladgeo17@mail.ru 2 Research Centre for X-ray Diffraction Studies, St. Petersburg State University, Universitetskiy ave. 26, St. Petersburg, 198504, Russian Federation 3 Centre for Geo-Environmental Research and Modelling (“Geomodel”), St. Petersburg State University, Ulyanovskaya str. 1, St. Petersburg, 198504, Russian Federation 4 Nanomaterials Research Centre, Kola Science Centre, Russian Academy of Sciences, Fersmana 14, 184209, Apatity, Russian Federation * Corresponding author","PeriodicalId":15957,"journal":{"name":"Journal of Geosciences","volume":"65 1","pages":"249-259"},"PeriodicalIF":1.4,"publicationDate":"2020-12-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48313903","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}

{"title":"The never-ending pursuit of a definitive chemical classification system for granites","authors":"M. García-Arias","doi":"10.3190/JGEOSCI.313","DOIUrl":"https://doi.org/10.3190/JGEOSCI.313","url":null,"abstract":"Chemical classifications of granites sensu lato have been developed and revisited over decades, but no classification scheme has been universally accepted yet. The more or less known coupled reasons for this apparently impossible task are reviewed here. The main problem is that different granitoids do not fall in distinct categories with sharp boundaries, but comprise a continuous spectrum of rock types both in their chemical and modal compositions. The unifying factor is the minimum-melt nature of the granites sensu stricto, as primary and evolved melts can have a granitic composition. This minimum-melt nature has two consequences, which are the main reasons for the absence of sharp boundaries in every compositional classification system, either modal or chemical. Firstly, the chemistry of granites spreads from the minimum melt to non-minimum compositions, and thus some granites represent a rock series formed by a continuous magmatic evolution, not by discrete steps; secondly, granite series, which are generated from different sources and by several petrogenetic processes, eventually converge at the most silica-rich compositions. There is a relationship between the tectonic scenarios of formation of granites and the chemical overlap that contributes to the absence of a satisfactory chemical classification: the protracted evolution of the tectonic settings following the Wilson cycle and more complicated scenarios change the chemical and modal composition of the granite sources. The overlap in the most silica-rich compositions of the granites s.l. due to the minimum melt nature may extend to more mafic members in a granite series: the closer the sources are in their composition, the greater is the overlap, becoming a second contribution to the lack of sharp boundaries between granite types. The huge efforts to create a satisfactory chemical compositional classification system have actually led to a significant contribution to granite petrology: the discovery of the main chemical differences between granite types, the main chemical parameters (silica content, alkalinity, aluminosity, maficity or FeOt + MgO content, and the Fe/Mg and Na/K ratios) and the petrogenetic processes that cause the change in these parameters. Therefore, despite the lack of agreement over the ‘perfect’ classification system, the investigations have not been fruitless: they have led to the realization that non-genetic classifications are preferable to name the individual rock samples; chemical classification schemes should be left to distinguish magmatic suites and to unravel their prospective petrogenesis and geotectonic setting.","PeriodicalId":15957,"journal":{"name":"Journal of Geosciences","volume":" ","pages":""},"PeriodicalIF":1.4,"publicationDate":"2020-12-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44095803","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}

{"title":"Distribution of Bi in the crystal structure of Bi-rich jamesonite, FePb4 (Sb5.48Bi0.52)Σ6S14","authors":"R. Pažout","doi":"10.3190/JGEOSCI.312","DOIUrl":"https://doi.org/10.3190/JGEOSCI.312","url":null,"abstract":"Crystal structure of Bi-rich jamesonite, FePb4Sb6S14, from Kutná Hora ore district, Czech Republic was solved from single-crystal X-ray diffraction data to establish whether bismuth shows a preference for any of the three antimony sites in the structure and whether increasing content of the element is placed in one specific site in the structure or is distributed over more sites. Jamesonite is monoclinic, P21/c, with a = 4.0237(3), b = 19.1136(17), c = 15.7813(15) Å, β = 91.799(7)°, V = 1213.10(18) Å3, Z = 2, Dcalc. = 5.7746 g·cm–3. The structural formula derived from the refinement is FePb4(Sb5.48Bi0.52)Σ6S14. The structure refinement (R = 5.22 %) of a needle-like crystal documents that out of three antimony sites in the structure, bismuth shows a preference for Sb1 and Sb3 sites in the lone-electron pair micelle of the [Pb4Sb6S13] substructure motif while the site Sb2 closest to the Fe octahedron is least inclined to accept bismuth. The refinement also reveals that bismuth content is simultaneously distributed over all three antimony sites and that the placement of bismuth first and preferentially into one antimony site does not take place.","PeriodicalId":15957,"journal":{"name":"Journal of Geosciences","volume":" ","pages":""},"PeriodicalIF":1.4,"publicationDate":"2020-12-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42826981","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}

{"title":"Geochronological constraints on the carbonate-sulfarsenide veins in Dobšiná, Slovakia: U/Pb ages of hydrothermal carbonates, Re/Os age of gersdorffite, and K/Ar ages of fuchsite","authors":"S. Kiefer, M. Števko, R. Vojtko, D. Ozdín, A. Gerdes, R. Creaser, M. Szczerba, J. Majzlan","doi":"10.3190/JGEOSCI.314","DOIUrl":"https://doi.org/10.3190/JGEOSCI.314","url":null,"abstract":"1 Institute of Geosciences, Friedrich-Schiller University, Burgweg 11, D–07749 Jena, Germany; email: stefan.kiefer@uni-jena.de 2 Earth Science Institute, Slovak Academy of Sciences, Dúbravská cesta 9, 840 05 Bratislava, Slovakia 3 Department of Mineralogy and Petrology, National Museum, Cirkusová 1740, CZ-19300 Praha 9, Czech Republic 4 Department of Geology and Palaeontology, Comenius University, Ilkovičova 6, SK-842 15 Bratislava, Slovakia 5 Department of Mineralogy and Petrology, Comenius University, Ilkovičova 6, SK-842 15 Bratislava, Slovakia 6 Department of Geosciences, Goethe University Frankfurt, Altenhöferallee 1, D-60438 Frankfurt, Germany 7 Frankfurt Isotope and Element Research Center (FIERCE), Goethe University Frankfurt, Germany 8 Department of Earth and Atmospheric Sciences, University of Alberta, Edmonton, Alberta T6G 2E3, Canada 9 Institute of Geological Sciences, Polish Academy of Sciences, ul. Senacka 1, 31-002 Krakow, Poland * Corresponding author","PeriodicalId":15957,"journal":{"name":"Journal of Geosciences","volume":"1 1","pages":""},"PeriodicalIF":1.4,"publicationDate":"2020-12-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42735394","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}

{"title":"The enigma of cuboid diamonds: the causes of inverse distribution of optical centers within the growth zones","authors":"E. Vasilev, D. Zedgenizov, I. Klepikov","doi":"10.3190/jgeosci.301","DOIUrl":"https://doi.org/10.3190/jgeosci.301","url":null,"abstract":"In the present work, diamonds with yellow cores and a slightly colored or colorless rims have been studied. Three groups of crystals that differ in spectroscopic features have been identified. In the crystals of the first group, the heterogeneity in color is due to the variation in nitrogen concentration, which is present as the simplest low-temperature nitrogen С center. Absorption spectra of the first group display peaks at wavenumbers 1344 and 1332 cm–1 of С and С+ centers, respectively. The second group also exhibits higher nitrogen concentrations in the form of C centers in the colored zone. However, the concentration of nitrogen in the form of high temperature А-centers, and the total nitrogen content is higher at the periphery of crystals. The FTIR absorption spectra of this group display both 1344 and 1332 cm–1 peaks. Crystals of the third group do not contain C centers. The 1332 cm–1 and the A center bands are observed in the FTIR absorption spectra. In the photoluminescence spectra of the colored zone of the third group, the bands S1 and S2 have been found and the doublet lines 883 and 885 nm of the simplest Ni-containing centers. Previously unobserved systems with zerophonon lines at 799.5, 819.6, 869.5 and 930 nm lines have been registered in the photoluminescence spectra of the third group under 787 nm excitation. It is hereby proposed that this luminescence is due to Ni-containing centers. In the third group of crystals, Ni seems to stabilize C+ centers and hence the coloring of crystal zones is consistent with Ni impurity distribution. Crystals of each group have distinct sources: the first group is from Yubileinaya pipe, the second from the placers of North Yakutia with unknown primary sources and the third from the Uralian deposits.","PeriodicalId":15957,"journal":{"name":"Journal of Geosciences","volume":"65 1","pages":"59-70"},"PeriodicalIF":1.4,"publicationDate":"2020-12-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48567050","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}

{"title":"A new solvothermal approach to obtain nanoparticles in the Cu3SnS4-Cu2FeSnS4 join","authors":"A. Giaccherini, A. Griesi, G. Montegrossi, M. Romanelli, G. Lepore, A. Lavacchi, G. Amthauer, G. Redhammer, G. Tippelt, S. Martinuzzi, G. Cucinotta, M. Mannini, A. Caneschi, F. Benedetto","doi":"10.3190/jgeosci.300","DOIUrl":"https://doi.org/10.3190/jgeosci.300","url":null,"abstract":"1 Dept. of Industrial Engineering, University of Florence, via di Santa Marta 3, 50100 Firenze, Italy 2 Center of Nanotechnology @NEST, Istituto Italiano di Tecnologia, Piazza San Silvestro 12, 56100 Pisa, Italy 3 Institute of Geosciences and Earth Resources, CNR, via G. La Pira, 4, 50124 Firenze, Italy 4 Dept. of Earth Sciences, University of Florence, via G. La Pira 4, 50124 Firenze, Italy; francesco.dibenedetto@unifi.it 5 Operative Group in Grenoble, Istituto di Officina dei Materiali, CNR, c/o European Synchrotron Radiation Facility (ESRF), avenue des Martyrs, 71, 38100 Grenoble, France 6 Institute for the Chemistry of OrganoMetallic Compounds, CNR, via Madonna del Piano 10, 50019 Sesto Fiorentino, Italy 7 Dept. of Chemistry and Physics of Materials, University of Salzburg, Jakob-Haringer-Straße 2, 5020 Salzburg, Austria 8 Dept. of Chemistry, University of Florence, via della lastruccia 3, 50019 Sesto Fiorentino, Italy * Corresponding author","PeriodicalId":15957,"journal":{"name":"Journal of Geosciences","volume":"65 1","pages":"3-14"},"PeriodicalIF":1.4,"publicationDate":"2020-12-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43721948","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}

{"title":"A feasibility investigation of speciation by Fe K-edge XANES using a laboratory X-ray absorption spectrometer","authors":"L. Mottram, Samuel Cafferkey, Amber R. Mason, T. Oulton, Shiyin Sun, D. Bailey, M. Stennett, N. Hyatt","doi":"10.3190/jgeosci.299","DOIUrl":"https://doi.org/10.3190/jgeosci.299","url":null,"abstract":"We demonstrate effective speciation of Fe in model compounds from analysis of the weak pre-edge features in Fe K-edge XANES spectra, with a commercially available laboratory X-ray spectrometer, using a spherically bent crystal analyser and a low-power X-ray tube, in Rowland circle geometry. Direct comparison with XANES data acquired from a third generation synchrotron bending magnet beamline, using the same specimens, validated quantitative agreement in determination of the total integrated intensity and centroid position of the pre-edge feature, which are a probe of the electronic configuration and symmetry of the absorber atom, and hence oxidation state and co-ordination number. This work opens the door to rapid and routine speciation studies of Fe by laboratory XANES, even for materials with relatively dilute absorber concentration of only a few mol. %.","PeriodicalId":15957,"journal":{"name":"Journal of Geosciences","volume":"65 1","pages":"27-35"},"PeriodicalIF":1.4,"publicationDate":"2020-12-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44256066","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}

{"title":"Molecular structure of the arsenate mineral chongite from Jáchymov – a vibrational spectroscopy study","authors":"J. Sejkora, J. Plášil, J. Čejka, Z. Dolníček, R. Pavlíček","doi":"10.3190/JGEOSCI.292","DOIUrl":"https://doi.org/10.3190/JGEOSCI.292","url":null,"abstract":"We have undertaken a study of the arsenate mineral chongite from the second world occurrence, which is Jáchymov (Czech Republic). Chongite occurs as colourless to white crystalline spherical and hemispherical aggregates up to 0.3 mm across composed of rich crusts on strongly weathered fragments of rocks and gangue. The chemical composition of chongite agrees well with the general stoichiometry of the hureaulite group of minerals and corresponds to the following empirical formula: Ca1.00(Mg1.24Ca0.69 0.06Mn0.01)Σ2.00Ca2.00[(AsO3OH)2.13(AsO4)1.84(PO4)0.03]Σ4.00·4H2O. Chongite is monoclinic, space group C2/c, with the unit-cell parameters refined from X-ray powder diffraction data: a 18.618(5), b 9.421(2), c 9.988(2) Å, β 96.86(2)o and V 1739.4(7) Å3. Raman bands at 3456, 3400, 3194 cm–1 and infrared bands at 3450, 3348, 3201 and 3071 cm–1 are assigned to the ν OH stretching structurally distinct differently hydrogen bonded water molecules. Raman bands at 2887, 2416 cm–1 and infrared bands at 2904, 2783 cm–1 are connected to ν OH stretching in hydrogen bonded (AsO3OH) units. Raman bands at 1656, 1578 cm–1 and infrared bands at 1652, 1601 cm–1 are assigned to the ν2 (δ) H2O bending vibrations of structurally distinct hydrogen bonded water molecules bonded in the structure by H-bonds of various strength. A Raman band at 1284 cm–1 and infrared bands at 1091 and 1061 cm–1 may be connected to the δ As–OH bending vibrations. The most prominent Raman bands at 902, 861, 828, 807, 758 cm–1 and infrared bands at 932, 899, 863, 815, 746 cm–1 are attributed to overlapping ν1 (AsO4) symmetric stretching, ν3 (AsO4) antisymmetric stretching, ν1 (AsO3OH) symmetric stretching, and ν3 (AsO3OH) antisymmetric stretching vibrations. Raman band at 693 cm–1 and infrared bands at 721, 634 cm–1 are assigned to δ AsOH bend and molecular water libration modes. Raman bands 506, 469, 451, 436 cm–1 and infrared bands at 503, 466 and 417 cm–1 are connected with the ν4 (δ) (AsO4) and (HOAsO3) bending vibrations. Raman bands at 389, 360, 346 and 302 cm–1 are related to the ν2 (δ) (AsO4) and (HOAsO3) bending vibrations. Raman bands at 275 and 238 cm–1 are assigned to the ν (OH⋅⋅⋅O) stretching vibrations and those at 190, 162, 110, 100 and 75 cm–1 to lattice modes.","PeriodicalId":15957,"journal":{"name":"Journal of Geosciences","volume":"65 1","pages":"1-10"},"PeriodicalIF":1.4,"publicationDate":"2020-12-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45481024","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}

{"title":"Indium-bearing paragenesis from the Nueva Esperanza and Restauradora veins, Capillitas mine, Argentina","authors":"M. F. Márquez-Zavalía, A. Vymazalová, M. A. Galliski, Yasushi Watanabe, H. Murakami","doi":"10.3190/jgeosci.304","DOIUrl":"https://doi.org/10.3190/jgeosci.304","url":null,"abstract":"1 IANIGLA, CCT-Mendoza (CONICET), Avda. A. Ruiz Leal s/n, Parque San Martin, CC330, (5500) Mendoza, Argentina; mzavalia@mendoza-conicet.gov.ar 2 Mineralogía y Petrología, FAD, Universidad Nacional de Cuyo, Centro Universitario (5502) Mendoza, Argentina 3 Department of Rock Geochemistry, Czech Geological Survey, Geologická 6, 152 00 Prague 5, Czech Republic 4 Faculty of International Resource Sciences, Mining Museum of Akita University, 28-2 Osawa, Tegata, Akita, 010-8502 Japan 5 Coal Business Planning Group, Coal Business Office, Resources & Power Company, JXTG Nippon Oil & Energy Corporation, 1-2, Otemachi 1-chome, Chiyoda-ku, Tokyo 100-8162 Japan * Corresponding author","PeriodicalId":15957,"journal":{"name":"Journal of Geosciences","volume":"65 1","pages":"97-109"},"PeriodicalIF":1.4,"publicationDate":"2020-08-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48180792","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}