Journal of Geosciences最新文献_第8页

Was the Tynong Batholith, Lachlan Orogen, Australia, extremely hot? Application of pseudosection modelling and TitaniQ geothermometry 澳大利亚拉克兰造山带的泰农基是否非常热?拟截面模拟与TitaniQ地热测量的应用

IF 1.4 4区地球科学

Journal of Geosciences Pub Date : 2020-08-07 DOI: 10.3190/jgeosci.305

K. Regmi, P. Hasalová, I. Nicholls

{"title":"Was the Tynong Batholith, Lachlan Orogen, Australia, extremely hot? Application of pseudosection modelling and TitaniQ geothermometry","authors":"K. Regmi, P. Hasalová, I. Nicholls","doi":"10.3190/jgeosci.305","DOIUrl":"https://doi.org/10.3190/jgeosci.305","url":null,"abstract":"Tonalites to granites of the Tynong Batholith, Lachlan Orogen, southeastern Australia as well as enclaves within them contain primary clinoand orthopyroxenes. These plutons produced very broad (2–10 km) contact aureoles that contain an anatectic zone within metagreywackes. The very broad contact aureoles can be related to the 3-D shapes of the plutons and we assume that the Cpx and Opx are remnants of higher temperature crystallization that were preserved due to water loss or low water content in the magma. Estimates of P and T based on x(Fe) values for coexisting cordierite and biotite in P–T pseudosections for a typical migmatitic hornfels, providing minimum temperature of pluton emplacement, indicate emplacement of the Toorongo tonalite at 4–10 km (1–3 kbar) and 680–750 °C. However, the isopleths of An content of plagioclase indicate depths of up to 14 km at 660–740 °C. We suggest that plagioclase was partially re-equilibrated during melt loss and post-emplacement decompression. Cathodoluminescence (CL) imaging shows that quartz both in the tonalites and hornfels is typically zoned from higher Ti contents in cores to lower in the margins, suggesting a response to falling temperature. Calculated temperatures for quartz crystallization using a Ti-in-quartz thermometer calibrated for 2.5 kbar gave a wide range of values between 900 and 500 °C. This suggests that although the granitoids contain two pyroxenes and have produced a broad contact aureole, they were not emplaced at temperatures as high as previously inferred.","PeriodicalId":15957,"journal":{"name":"Journal of Geosciences","volume":"65 1","pages":"121-138"},"PeriodicalIF":1.4,"publicationDate":"2020-08-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48777646","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

WinGrt, a Windows program for garnet supergroup minerals WinGrt，一个用于石榴石超群矿物的Windows程序

IF 1.4 4区地球科学

Journal of Geosciences Pub Date : 2020-08-07 DOI: 10.3190/jgeosci.303

F. Yavuz, D. Yildirim

{"title":"WinGrt, a Windows program for garnet supergroup minerals","authors":"F. Yavuz, D. Yildirim","doi":"10.3190/jgeosci.303","DOIUrl":"https://doi.org/10.3190/jgeosci.303","url":null,"abstract":"A Microsoft® Visual Basic software, called WinGrt, has been developed to calculate and classify wet-chemical and electron-microprobe garnet supergroup mineral analyses. The program evaluates 33 approved species that belong to the tetragonal henritermierite and isometric bitikleite, schorlomite, garnet and berzeliite groups based on the Commission on New Minerals and Mineral Names (CNMMN) of the International Mineralogical Association (IMA–13) nomenclature scheme. WinGrt also evaluates thirty geothermometers using the Fe2+–Mg exchange reactions for garnet–biotite, garnet–clinopyroxene and garnet–orthopyroxene pairs within the application range of greenschist-, amphibolite-, granuliteand eclogite-facies metamorphic rocks. As naturally occurring garnet is potentially a useful provenance indicator, the program calculates end-member molecules from chemical compositions on the basis of different approaches and yields pyrope, almandine, spessartine, grossular, andradite and schorlomite phase on various ternary discrimination diagrams used in provenance studies. The ferric and ferrous iron contents from total FeO (wt. %) amount are estimated by stoichiometric constraints. The program allows the users to enter 30 input variables including Sample No, SiO2, TiO2, ZrO2, HfO2, Th2O, SnO2, Al2O3, Cr2O3, V2O3, Fe2O3, Mn2O3, Sc2O3, Y2O3 + REE2O3, FeO, MgO, MnO, ZnO, CaO, Na2O, Li2O, P2O5, V2O5, Sb2O5, As2O5, Nb2O5, UO3, Te2O3, F and H2O (wt. %). WinGrt also enables the user to enter the total REE2O3 (wt. %) as input values from La2O3 to Lu2O3 (wt. %) of garnet supergroup mineral analyses in program’s data edit section. WinGrt enables the user to type or load multiple garnet compositions in the data entry section, to edit and load Microsoft® Excel files in calculating, classifying and naming the garnet species, and to store all the calculated parameters in the Microsoft® Excel file for further evaluation.","PeriodicalId":15957,"journal":{"name":"Journal of Geosciences","volume":"65 1","pages":"71-95"},"PeriodicalIF":1.4,"publicationDate":"2020-08-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48462614","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: 9

Stangersite, a new tin germanium sulfide, from the Kateřina mine, Radvanice near Trutnov, Czech Republic Stangersite，一种新的锡锗硫化物，来自捷克共和国Trutnov附近的Radvanice Kateřina矿

IF 1.4 4区地球科学

Journal of Geosciences Pub Date : 2020-07-10 DOI: 10.3190/jgeosci.306

J. Sejkora, E. Makovicky, T. Balić-Žunić, P. Berlepsch

{"title":"Stangersite, a new tin germanium sulfide, from the Kateřina mine, Radvanice near Trutnov, Czech Republic","authors":"J. Sejkora, E. Makovicky, T. Balić-Žunić, P. Berlepsch","doi":"10.3190/jgeosci.306","DOIUrl":"https://doi.org/10.3190/jgeosci.306","url":null,"abstract":"The new mineral stangersite was found in the burning waste dump of abandoned Kateřina coal mine at Radvanice near Trutnov, northern Bohemia, Czech Republic. The new mineral occurs as well-formed, flattened, acicular crystals with a cross-section of 2–5 × 20–40 μm and up to 1 cm in length. They constitute random or fan-shaped clusters on rock fragments and on crumbly black ash in association with greenockite, herzenbergite, unnamed GeS 2 and GeAsS. Stangersite was also observed as irregular grains, up to 100 μm in size, in the multicomponent aggregates on which the above-described crystals grow. These aggregates are formed, beside stangersite, by minerals of Bi–Sb, Bi 2 S 3 –Sb 2 S 3 and Bi 2 S 3 –Bi 2 Se 3 solid solutions, Bi 3 S 2 , Bi-sulfo/seleno/tellurides, tellurium, unnamed PbGeS 3 , Cd 4 GeS 6 , GeAsS, GeS 2 , Sn 5 Sb 3 S 7 , greenockite, cadmoindite, herzenbergite, teallite and Sn- and/or Se-bearing galena. Stangersite formed under reducing conditions by direct crystallization from hot gasses (250–350 °C) containing Cl and F, at a depth of 30–60 cm under the surface of the (100) layers of Sn 2+ S 5 coordination pyramids and with interspaces filled by lone electron pairs of Sn 2+ and [001] chains of Ge 4+ S 4 coordination tetrahedra. The Raman spectrum of stangersite with tentative band assignments is given. We named the mineral after its chemical constituents: Sn ( stan num), Ge ( ger manium) and S ( s ulphur).","PeriodicalId":15957,"journal":{"name":"Journal of Geosciences","volume":" ","pages":""},"PeriodicalIF":1.4,"publicationDate":"2020-07-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46934918","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: 3

A word of the retiring Editor-in-Chief & A word of the newly-coming Editor-in-Chief: (Not such) significant changes in the editorial board 即将退休的主编的一句话和即将上任的主编的一番话：编委会发生了重大变化

IF 1.4 4区地球科学

Journal of Geosciences Pub Date : 2020-07-10 DOI: 10.3190/jgeosci.311

V. Janoušek, J. Plášil

引用次数: 0

Pošepnýite, a new Hg-rich member of the tetrahedrite group from Příbram, Czech Republic Pošepnýite是来自捷克共和国Příbram的一个新的富氢四面体成员

IF 1.4 4区地球科学

Journal of Geosciences Pub Date : 2020-07-10 DOI: 10.3190/jgeosci.308

P. Škácha, J. Sejkora, J. Plášil, E. Makovicky

引用次数: 6

The petrostructural characteristics and 207Pb/206Pb zircon data from the Ngomedzap-Akongo area (Nyong complex, SW-Cameroon) Ngomedzap Akongo地区（喀麦隆西南部Nyong杂岩）的岩石结构特征和207Pb/206Pb锆石数据

IF 1.4 4区地球科学

Journal of Geosciences Pub Date : 2020-07-10 DOI: 10.3190/jgeosci.309

S. Owona, J. M. Ondoa, M. Tichomirowa, G. Ekodeck

{"title":"The petrostructural characteristics and 207Pb/206Pb zircon data from the Ngomedzap-Akongo area (Nyong complex, SW-Cameroon)","authors":"S. Owona, J. M. Ondoa, M. Tichomirowa, G. Ekodeck","doi":"10.3190/jgeosci.309","DOIUrl":"https://doi.org/10.3190/jgeosci.309","url":null,"abstract":"Herein, we constrain the Ngomedzap–Akongo geodynamic evolution in the eastern part of the Nyong complex (NyC) in SW Cameroon that belongs to the Paleoproterozoic West Central African Fold Belt (WCAF) through petrostructural field observations, laboratory analyses, and 207Pb/206Pb zircon geochronology. It consists of magnetite bearing quartzite, metagranodiorite, metaanorthosite, metagabbro, and metasyenites that have recorded a polyphase D1–D3 deformation. D1, likely a pure shear-type, has been strongly overprinted by the D2 transpression flow regime that emplaced the Nyong tectonic nappe, transported top – to the East onto the Congo shield. This nappe is dissected by D3 blastomylonitic shear-zones. Both the D2 and D3 have controlled the actual geometry of the Nyong belt, later crosscut by D4 multiple brittle tectonic styles, likely post-orogenic. Zircon geochronology yielded 207Pb/206Pb zircon geochronology protolith Archean mean ages of 2764 ± 26 Ma (MSWD = 0.81) in metagranodiorite; 2816 ± 34 Ma (MSWD = 1.3) and 2789 ± 13 Ma (MSWD = 0.28) in metasyenites. These new data corroborate old ones and, together, document the Archean origin of the NyC as details of the Nyong fold-and-thrust belts that of WCAFB and South American homologous due to the colliding Congo-San Francisco shields associated with Eburnean/Trans Amazonian orogeny (~2100–2050 Ma).","PeriodicalId":15957,"journal":{"name":"Journal of Geosciences","volume":"65 1","pages":"201-219"},"PeriodicalIF":1.4,"publicationDate":"2020-07-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49149048","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: 10

New crystal-chemical data on zincoberaunite from Krásno near Horní Slavkov (Czech Republic) HorníSlavkov附近Krásno锌钴酸盐的新晶体化学数据（捷克共和国）

IF 1.4 4区地球科学

Journal of Geosciences Pub Date : 2020-04-12 DOI: 10.3190/jgeosci.296

J. Tvrdý, J. Plášil, R. Škoda

{"title":"New crystal-chemical data on zincoberaunite from Krásno near Horní Slavkov (Czech Republic)","authors":"J. Tvrdý, J. Plášil, R. Škoda","doi":"10.3190/jgeosci.296","DOIUrl":"https://doi.org/10.3190/jgeosci.296","url":null,"abstract":"A study of zincoberaunite from Krásno near Horní Slavkov (Czech Republic) provided new chemical and structural data of this rare member of the beraunite group. The studied material is monoclinic, space group C2/c, with a = 20.3440(19) Å, b = 5.1507(3) Å, c = 19.1361(15) Å, β = 93.568(8)°, V = 2001.3(3) Å3, Z = 4. Based on refined site occupancies and bond-valence considerations, the structural formula is (Zn0.81Al0.19)(OH)2(Fe0.61Al0.39)(OH)2(H2O)2(Fe1.52Al0.48)(H2O)2(Fe1.72Al0.28) (OH)(PO4)3.83(AsO4)0.17(H2O)2. Electron-microprobe analyses support the obtained results. However, keeping the same cation occupancy at the M2–M4 sites, the ratio of Al3+ to Me2+ at the M1 site requires the presence of divalent cations as follows: (Zn0.57Fe0.24Al0.19)Σ1.00(Fe3.85Al1.15)Σ5.00[(PO4)3.89(AsO4)0.10(SiO4)0.01]Σ4.00[(OH)4.59F0.24 O0.17]Σ5.00(OH2)4.00·2H2O. Individual prismatic zincoberaunite crystals exhibit a chemical zonation manifested by increasing Fe and decreasing Zn and Al contents from cores to rims. The mineral composition is close to the Zn–Al-rich members of the beraunite group known from the same locality, but in this case, dominant occupancy of Zn at the M1 site was confirmed. With its increased aluminium content, zincoberaunite from Krásno differs significantly from the holotype specimen described from Hagendorf South pegmatite in Germany. The most prominent Raman bands are in good agreement with data published for related members of the beraunite group. Structure refinement (R = 3.56 % for 1906 observed unique reflections) revealed three different types of OH or H2O, which play distinct role in structure bonding.","PeriodicalId":15957,"journal":{"name":"Journal of Geosciences","volume":"65 1","pages":"45-57"},"PeriodicalIF":1.4,"publicationDate":"2020-04-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49545909","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: 4

Activation energy of annealed, partially metamict davidite by 57Fe Mössbauer spectroscopy 57Fe Mössbauer光谱分析退火后部分变质大卫石的活化能

IF 1.4 4区地球科学

Journal of Geosciences Pub Date : 2020-04-12 DOI: 10.3190/jgeosci.298

D. Malczewski, A. Grabias, M. Dziurowicz

引用次数: 0

Crystal structure of the uranyl-molybdate mineral calcurmolite Ca[(UO2)3(MoO4)2(OH)4](H2O)˜5.0: insights from a precession electron-diffraction tomography study 铀酰钼酸盐钙镁石Ca[(UO2)3(MoO4)2(OH)4](H2O)≈5.0的晶体结构:来自进动电子衍射层析研究的见解

IF 1.4 4区地球科学

Journal of Geosciences Pub Date : 2020-04-12 DOI: 10.3190/jgeosci.297

G. Steciuk, R. Škoda, J. Rohlíček, J. Plášil

{"title":"Crystal structure of the uranyl-molybdate mineral calcurmolite Ca[(UO2)3(MoO4)2(OH)4](H2O)˜5.0: insights from a precession electron-diffraction tomography study","authors":"G. Steciuk, R. Škoda, J. Rohlíček, J. Plášil","doi":"10.3190/jgeosci.297","DOIUrl":"https://doi.org/10.3190/jgeosci.297","url":null,"abstract":"Calcurmolite is a rare supergene U mineral formed during the alteration–hydration weathering of uraninite and hypogene Mo minerals; its structure has remained unsolved owing to a lack of crystal material suitable for conventional structure analysis. Here, single-crystal precession electron-diffraction tomography shows the calcurmolite (Rabejac, France) structure to be modulated; it is triclinic, crystallizing in the super-space group P1(α00)0, with a = 3.938 Å, b = 11.26 Å, c = 14.195 Å, α = 84.4°, β = 112.5°, γ = 133.95° and has a modulation vector q = 0.4 a*. Due to the poor quality of diffraction data, only a kinematical refinement was undertaken, although final results were reasonable: Robs/Rall = 0.3825/0.3834 for 3953/17442 observed/all reflections. The structure of calcurmolite is based upon the infinite uranyl–molybdate sheets with baumoite topology (U : Mo ratio = 1.5) and an interlayer of 6-coordinated Ca2+ cations with interstitial H2O (ligands are apical uranyl O atoms and molecular H2O). Adjacent sheets are linked via Ca–O, as well as H-bonds. The structure formula, based on assumed occupancies in the supercell 5a × b × c, is Ca[(UO2)3 (MoO4)2(OH)4](H2O)~5.0 (for Z = 4).","PeriodicalId":15957,"journal":{"name":"Journal of Geosciences","volume":"65 1","pages":"15-25"},"PeriodicalIF":1.4,"publicationDate":"2020-04-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45905087","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: 4

Foreword to the special issue arising from the 9th European Conference on Mineralogy and Spectroscopy 第九届欧洲矿物学和光谱学会议特别议题的前言

IF 1.4 4区地球科学

Journal of Geosciences Pub Date : 2020-04-12 DOI: 10.3190/jgeosci.302

F. Laufek, J. Plášil, J. Cempírek, R. Škoda

{"title":"Foreword to the special issue arising from the 9th European Conference on Mineralogy and Spectroscopy","authors":"F. Laufek, J. Plášil, J. Cempírek, R. Škoda","doi":"10.3190/jgeosci.302","DOIUrl":"https://doi.org/10.3190/jgeosci.302","url":null,"abstract":"Spectroscopy methods provide valuable information about the local structure of minerals, since they do not depend on long-range periodicity (they are sensitive to defects or substitutions and vice versa), and, therefore represent great complementary techniques to diffraction methods that are used to analyze periodic (global) structures of minerals. Spectroscopy techniques have been successfully applied to the minerals during past decades, namely due to still-growing possibilities connected with the evolution of the instrumentation and data analysis. Following the European Spectroscopic Conferences in Rome (1988), Berlin (1995), Kiev (1996), Paris (2001), Vienna (2004), Stockholm (2007), Potsdam (2011) and Rome (2015), the 9th European Conference on Mineralogy and Spectroscopy (ECMS 2019) took place at Břevnov Monastery, Prague, Czech Republic on September 10–13, 2019. The conference brought together 111 participants from 20 countries. One hundred two oral and poster contributions were presented during three days. Among these contributions, six invited keynote-talks were presented by Peter C. Burns (University of Notre Dame, USA), Janice Bishop (SETI Institute, USA), Sergey V. Krivovichev (St. Petersburg State University, Russia), Anna Vymazalová (Czech Geological Survey, Czechia), Jural Majzlan (Friedrich Schiller Universität, Germany) and Sergey S. Lobanov (GFZ German Research Center for Geosciences, Germany). About one third of the delegates were students, who had the opportunity to present their work to broad international audience. Two workshops focused on gemstone deposits and training in crystallographic com-","PeriodicalId":15957,"journal":{"name":"Journal of Geosciences","volume":"65 1","pages":"1-2"},"PeriodicalIF":1.4,"publicationDate":"2020-04-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47210758","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