Journal of Geosciences最新文献

{"title":"A word of the Editor-in-Chief","authors":"J. Plašil","doi":"10.3190/jgeosci.325","DOIUrl":"https://doi.org/10.3190/jgeosci.325","url":null,"abstract":"","PeriodicalId":15957,"journal":{"name":"Journal of Geosciences","volume":" ","pages":""},"PeriodicalIF":1.4,"publicationDate":"2021-11-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47007724","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":"Rapidcreekite of anthropogenic origin - ’korkinoite’ from burnt mine dump in the Chelyabinsk coal basin, South Urals, Russia: crystal structure refinement, thermal behavior and spectroscopic characterization","authors":"M. Avdontceva, A. Zolotarev, S. Krivovichev, M. G. Krzhizhanovskaya, V. Bocharov, V. Shilovskikh, M. Rassomakhin","doi":"10.3190/jgeosci.327","DOIUrl":"https://doi.org/10.3190/jgeosci.327","url":null,"abstract":"1 Institute of Earth sciences, Saint-Petersburg State University, Universitetskaya emb. 7/9, 199034, St. Petersburg, Russia; m.avdontceva@spbu.ru 2 Nanomaterials Research Center, Federal Research Center, Kola Centre, Russian Academy of Sciences, 14, Fersman st., Apatity, 184209, Murmansk Region, Russia 3 Centre for Geo-Environmental Research and Modelling, Saint-Petersburg State University, Ulyanovskaya st., 1, St. Petersburg, Russia 4 South Urals Federal Research Center of Mineralogy and Geoecology of UB RAS, 456317 Miass, Russia * Corresponding author","PeriodicalId":15957,"journal":{"name":"Journal of Geosciences","volume":" ","pages":""},"PeriodicalIF":1.4,"publicationDate":"2021-11-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48934574","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":"Crystal structure of undersubstituted Sb-rich vikingite Vik40, Ag2.85Pb12.35(Bi9.52Sb1.27)Σ=10.80S30: site population and comparison with structure of vikingite Vik50, Ag3.5Pb11.0Bi11.5S30","authors":"R. Pažout, M. Dušek","doi":"10.3190/jgeosci.329","DOIUrl":"https://doi.org/10.3190/jgeosci.329","url":null,"abstract":"Crystal structure of Sb-rich vikingite with lillianite substitution percentage L % below 50 % from Kutná Hora ore district, Czech Republic, was solved and refined from single-crystal diffraction data to determine the site populations of metal sites concerning a) the decreasing “lillianite“ substitution 2 Pb2+ = Ag+ + Bi; b) Sb content not known in vikingite from other localities throughout the world. Vikingite is monoclinic, C2/m, with a = 13.5394(10), b = 4.0992(3), c = 25.506(3) Å, β = 95.597(8)°, V = 1408.9(2) Å3, Z = 1, Dc = 7.0412 g/cm3. The structural formula derived from the refinement is Ag2.85Pb12.35(Bi9.52Sb1.27)Σ=10.80S30, corresponding to Vik40.0. The structure of vikingite is composed of thinner slabs (4L) of four octahedra Me2–Me1–Me1–Me2 and thicker slabs (7L) of seven octahedra Me4–Me5–Me6–Me7–Me6–Me5–Me4 separated by Pb atoms Me3 in trigonal prismatic coordination. The refinement showed differences between the structures of Vik40 and the previously published structure of Vik50. The drop of L % below 50 % shows most profoundly in the marginal octahedral site Me2 of the thinner 4L slabs, which becomes a Bi–Pb–Ag site with 28.6 % of silver next to 50 % of Bi and 21.4 % of Pb. The central Me1 site from 4L slabs which is almost a pure Bi site in Vik50 (0.97 Bi + 0.3 Ag) becomes a Bi-Pb site with minor Sb (0.54 Bi + 0.06 Sb + 0.40 Pb) in Vik40. The Sb for Bi substitution was found to take place in the semimarginal site Me5 (0.74 Bi + 0.26 Sb) in the thicker 7L slabs, which is a pure Bi site in Sb-free Vik50. Another important change against Vik50 occurs in central octahedral site Me6 (pure Pb site in Vik50), which becomes – despite the decrease in Bi content with decreasing L % – a Pb–Bi mix site. The correctness of the refined structural model was verified and the occupancies of mixed sites were fine-tuned employing charge distribution calculations in program ECoN21. In Vik40 weighted average bond lengths RAV of the marginal sites Me2 and Me4 and of the central site Me1 are significantly larger than in Vik50, reflecting the lower Ag content and the presence of Pb, while the Bi site Me5, which is partly substituted by Sb and the site Me6 with minor Bi at the expense of Pb exhibit adequately shortened RAV values.","PeriodicalId":15957,"journal":{"name":"Journal of Geosciences","volume":" ","pages":""},"PeriodicalIF":1.4,"publicationDate":"2021-11-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41533842","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":"Auerbakhite, MnTl2As2S5, a new thallium sulfosalt from the Vorontsovskoe gold deposit, Northern Urals, Russia","authors":"A. Kasatkin, J. Plášil, E. Makovicky, N. Chukanov, R. Škoda, A. Agakhanov, S. Stepanov, R. Palamarchuk","doi":"10.3190/JGEOSCI.321","DOIUrl":"https://doi.org/10.3190/JGEOSCI.321","url":null,"abstract":"1 Fersman Mineralogical Museum of Russian Academy of Sciences, Leninsky Prospekt 18–2, 119071 Moscow, Russia; anatoly.kasatkin@gmail.com 2 Institute of Physics, Academy of Sciences of the Czech Republic v.v.i, Na Slovance 1999/2, Prague 8, 182 21, Czech Republic 3 Department of Geoscience and Resource Management, University of Copenhagen, Østervoldgade 10, DK–1350, Copenhagen K, Denmark 4 Institute of Problems of Chemical Physics, Russian Academy of Sciences, Chernogolovka, Moscow region, 142432 Russia 5 Department of Geological Sciences, Faculty of Science, Masaryk University, Kotlářská 2, 611 37, Brno, Czech Republic 6 Institute of Geology and Geochemistry, UB RAS, Akademika Vonsovskogo 15, Yekaterinburg, 620016 Russia 7 South Urals Federal Research Center of Mineralogy and Geoecology UB RAS, Institute of Mineralogy, Miass, Chelyabinsk oblast, 456317 Russia * Corresponding author","PeriodicalId":15957,"journal":{"name":"Journal of Geosciences","volume":" ","pages":""},"PeriodicalIF":1.4,"publicationDate":"2021-07-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48147475","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 geochemical study of gersdorffite from the Trepça Mineral Belt, Vardar Zone, Kosovo","authors":"Sławomir Mederski, Marcin Wojslaw, Stanislav Prsek, J. Majzlan, S. Kiefer, Burim Asllani","doi":"10.3190/JGEOSCI.322","DOIUrl":"https://doi.org/10.3190/JGEOSCI.322","url":null,"abstract":"This work presents a textural and chemical study of gersdorffite from numerous small occurrences of hydrothermal Pb–Zn + (Ni–As–Sb) mineralization from Trepça Mineral Belt (broad area of Stan Terg and Kizhnica–Hajvalia–Badovc ore field) hosted in hydrothermally altered serpentinites (listvenites). Mineral associations, textural relations and substitutional trends of gersdorffite recognized in Kizhnica, Mazhiq, Melenica, Vllahia and Selac are discussed based on microscopy and microprobe studies. The two types of paragenetic sequence with nickel mineralization are distinguished in studied localities: Ni–Fe–Co sulfides → Ni sulfarsenides and sulfantimonides (in Kizhnica–Badovc and Melenica) and Ni sulfarsenides → Ni–Fe arsenide and diarsenide → ± Ni sulfides (Vllahia and Selac). Various substitution trends in studied GUS are detected: Fe + Co/Ni (all localities, except Selac); As/Sb – gersdorffite–ullmannite series (Kizhnica, Mazhiq, Vllahia VLX) and As + Sb/S (Selac and Vllahia VL4). Based on As/S ratio, two different hydrothermal fluids were distinguished: narrow range and low As/S values (Kizhnica, Mazhiq, Melenica, Vllahia VLX), which suggest decreased As activity, mixing in the proximity of deposition site (Kizhnica, Mazhiq), broad range and high As/S values: increased As activity and disequilibrium crystallization (Selac, Vllahia VL4).","PeriodicalId":15957,"journal":{"name":"Journal of Geosciences","volume":" ","pages":""},"PeriodicalIF":1.4,"publicationDate":"2021-07-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42077512","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":"Petrogenesis of silica-rich carbonatites from continental rift settings: a missing link between carbonatites and carbonated silicate melts?","authors":"L. Ackerman, V. Rapprich, L. Polák, T. Magna, V. McLemore, O. Pour, B. Cejkova","doi":"10.3190/JGEOSCI.320","DOIUrl":"https://doi.org/10.3190/JGEOSCI.320","url":null,"abstract":"1 Institute of Geology of the Czech Academy of Sciences of the Czech Republic, Rozvojová 269, 165 00 Prague 6, Czech Republic; ackerman@gli.cas.cz 2 Czech Geological Survey, Klárov 3, 118 21 Prague 1, Czech Republic 3 Institute of Geochemistry, Mineralogy and Mineral Resources, Faculty of Science, Charles University, Albertov 6, 128 43 Prague 2, Czech Republic 4 New Mexico Bureau of Geology and Mineral Resources, New Mexico Institute of Mining and Technology, 801 Leroy Pl, Socorro, USA * Corresponding author","PeriodicalId":15957,"journal":{"name":"Journal of Geosciences","volume":" ","pages":""},"PeriodicalIF":1.4,"publicationDate":"2021-07-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42430961","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":"Dobšináite, Ca2Ca(AsO4)2·2H2O, a new member of the roselite group from Dobšiná (Slovak Republic)","authors":"J. Sejkora, M. Števko, R. Škoda, E. Viskova, J. Toman, Sebastián Hreus, J. Plášil, Z. Dolníček","doi":"10.3190/JGEOSCI.324","DOIUrl":"https://doi.org/10.3190/JGEOSCI.324","url":null,"abstract":"1 Department of Mineralogy and Petrology, National Museum, Cirkusová 1740, 193 00 Prague 9, Czech Republic; jiri.sejkora@nm.cz 2 Earth Science Institute, Slovak Academy of Sciences, Dúbravská cesta 9, 840 05 Bratislava, Slovak Republic 3 Department of Geological Sciences, Faculty of Science, Masaryk University, Kotlářská 2, 611 37, Brno, Czech Republic 4 Department of Mineralogy and Petrography, Moravian Museum, Zelný trh 6, 659 37 Brno, Czech Republic 5 Institute of Physics, Academy of Sciences of the Czech Republic v.v.i, Na Slovance 2, 182 21 Prague 8, Czech Republic * Corresponding author","PeriodicalId":15957,"journal":{"name":"Journal of Geosciences","volume":" ","pages":""},"PeriodicalIF":1.4,"publicationDate":"2021-07-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41676130","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":"Depth-to-basement study for the western Polish Outer Carpathians from three-dimensional joint inversion of gravity and magnetic data","authors":"Mateusz Mikołajczak, J. Barmuta, Malgorzata Ponikowska, S. Mazur, K. Starzec","doi":"10.3190/JGEOSCI.317","DOIUrl":"https://doi.org/10.3190/JGEOSCI.317","url":null,"abstract":"Results of a depth-to-basement study are presented for the westernmost Polish Outer Carpathians. The gravity data are inverted for the top of the Precambrian basement using horizons from 2–D gravity and magnetic forward models and well tops as input depth measurements. 2–D models, used in the study, are built upon depth converted seismic profiles. The results are visualized as an isobath map for the top of the Precambrian basement, complemented with the qualitative structural interpretation of gravity and magnetic anomaly maps. The outcome of 3–D joint inversion of the gravity data and depth measurements shows the Precambrian crystalline basement deepening southward from c. 1 to almost 7 km b. s. l. Consequently, an approximately 2 km thick wedge of autochthonous sediments, thickening southward, is embraced between the crystalline basement and a sole detachment of the Carpathian fold-and-thrust belt, imaged by seismic data. Since the modelled top of the crystalline basement is roughly parallel to the Moho, suggesting no extension-related thinning in Mesozoic, the autochthonous sediments are likely of pre-Permian age. A positive magnetic anomaly in the south of the study area is presumably associated with the presence of an elongated body of intermediate to mafic rocks in the basement of the Brunovistulian Terrane. These rocks may represent a relic of a Cadomian magmatic arc comparable to that existing in the Brno Massif of southern Moravia.","PeriodicalId":15957,"journal":{"name":"Journal of Geosciences","volume":" ","pages":""},"PeriodicalIF":1.4,"publicationDate":"2021-04-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45819961","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":"Krupičkaite, Cu6[AsO3(OH)]6·8H2O, a new copper arsenate mineral from Jáchymov (Czech Republic)","authors":"G. Steciuk, J. Sejkora, J. Čejka, J. Plášil, J. Hloušek","doi":"10.3190/JGEOSCI.318","DOIUrl":"https://doi.org/10.3190/JGEOSCI.318","url":null,"abstract":"Krupičkaite, ideally Cu6[AsO3(OH)]6·8H2O, is a new supergene mineral from the Rovnost I shaft in Jáchymov, Czech Republic. It forms aggregates of pale greenish-blue color and grows along with supergene minerals crystallizing on the strongly altered relics of massive tennantite, Bi-rich tennantite, galena, chalcopyrite, bornite, and chalcocite with disseminated uraninite in quartz. For a long time, krupičkaite has been left out due to its quite inconspicuous ap pearance that can be mistakenly referred to as geminite. At the ambient temperature, krupičkaite is monoclinic, a = 15.504(7) Å, b = 18.144(7) Å, c = 10.563(5) Å, β = 103.30(4)°, V = 2891.5(2) Å3, Z = 4, space group P21/m. Its structure has been solved and refined from 3D electron diffraction and further studied by Raman spectroscopy. The layered structure is built upon the alternation of two different copper-arsenate sheets stacked along b presenting a characteristic wave shape along the a–axis and separated by a thick interlayer with channels containing only H2O. The collapsed chains of copper polyhedra are connected the same way as in geminite through AsO4 tetrahedra. Krupičkaite joins the family of copper arsenate minerals with which it shares structural similarities at the level of the As-Cu layers with the lindackerite supergroup, slavkovite, or yvonite.","PeriodicalId":15957,"journal":{"name":"Journal of Geosciences","volume":"1 1","pages":"37-50"},"PeriodicalIF":1.4,"publicationDate":"2021-04-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45107335","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":"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}