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  • 1
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    Riomarinait z Cínovce - první výskyt velmi vzácného sulfátu bismutu v České republice
    Bulletin Mineralogie Petrologie ; 2020
    In:  Bulletin Mineralogie Petrologie Vol. 28, No. 2 ( 2020), p. 359-363
    Details
    In: Bulletin Mineralogie Petrologie, Bulletin Mineralogie Petrologie, Vol. 28, No. 2 ( 2020), p. 359-363
    Abstract: A very rare bismuth sulphate, riomarinaite, was found in an old abandoned shaft on a Sn-W deposit Cínovec near Teplice, Northern Bohemia. This is first occurrence of this generally very rare mineral in the Czech Republic. Riomarinaite forms grey and blue acicular and columnar crystals up to 30 μm in size in association with native bismuth and bismuthinite. Riomarinaite is monoclinic, space group P21/n, the unit-cell parameters refined from X-ray powder diffraction data are: a 6.0091(19), b 13.328(5), c 6.483(3) Å, β 112.91(5)˚ and V 478.3(3) Å3. Chemical analyses of riomarinaite correspond to the empirical formula (Bi1.10Ca0.02)Σ1.12[(SO4)0.92(MoO4)0.08]Σ1.00(OH)1.33·H2O on the basis of S + Mo = 1 apfu. Raman bands connected with vibrations of (OH)-, H2O, (SO4)2- groups, Bi-O bonds and lattice modes were observed in the Raman spectrum of riomarinaite.
    Type of Medium: Online Resource
    ISSN: 2570-7345 , 2570-7337
    URL: Issue
    URL: Journal
    URL: Article
    DOI: 10.46861/bmp.28
    DOI: 10.46861/bmp
    DOI: 10.46861/bmp.28.359
    Language: cs
    Publisher: Bulletin Mineralogie Petrologie
    Publication Date: 2020
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  • 2
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    Hydrotermálny bastnäsit-(Ce) zo štôlne Elisabeth pri Gemerskej Polome (Slovenská republika)
    Bulletin Mineralogie Petrologie ; 2020
    In:  Bulletin Mineralogie Petrologie Vol. 28, No. 1 ( 2020), p. 1-8
    Details
    In: Bulletin Mineralogie Petrologie, Bulletin Mineralogie Petrologie, Vol. 28, No. 1 ( 2020), p. 1-8
    Abstract: Bastnäsite-(Ce), ideally CeCO3F, was recently found at the dumps of the Elisabeth adit near Gemerská Poloma, Rožňava Co., Košice Region, eastern Slovakia. It forms orange-brown aggregates up to 2 × 1 cm with vitreous to greasy lustre, which occur in the hydrothermal quartz veins crosscutting the coarse-grained, porphyritic rare metal S-type granite. Bastnäsite-(Ce) is closely associated with white, pale-green to purple fluorite, siderite and minor pyrite. It is hexagonal, space group P-62c with refined unit-cell parameters: a 7.1354(1) Å, c 9.7954(2) Å and V 431.90(1) Å3. The empirical formula of bastnäsite-(Ce) from the Gemerská Poloma based on sum of all cations = 1 apfu is (Ce0.49 La0.22Nd0.15Pr0.05Sm0.03Th0.02Ca0.02Gd0.01Y0.01)Σ1.00(CO3)1.00F0.83(OH)0.17. The Raman and infrared spectra of bastnäsite-(Ce) as well as tentative assignment of observed bands are given in this paper. Bastnäsite-(Ce) and associated minerals were formed from the early-hydrothermal post-magmatic fluids related to the adjacent granite.
    Type of Medium: Online Resource
    ISSN: 2570-7345 , 2570-7337
    URL: Issue
    URL: Journal
    URL: Article
    DOI: 10.46861/bmp.28
    DOI: 10.46861/bmp
    DOI: 10.46861/bmp.28.001
    Language: cs
    Publisher: Bulletin Mineralogie Petrologie
    Publication Date: 2020
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  • 3
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    Pyrostilpnit z ložiska Stará Vožice - Ratibořské Hory (Česká republika)
    Bulletin Mineralogie Petrologie ; 2020
    In:  Bulletin Mineralogie Petrologie Vol. 28, No. 1 ( 2020), p. 69-73
    Details
    In: Bulletin Mineralogie Petrologie, Bulletin Mineralogie Petrologie, Vol. 28, No. 1 ( 2020), p. 69-73
    Abstract: A rare silver mineral pyrostilpnite, monoclinic Ag3SbS3, was found on a two museum specimens from the historical Ag-Pb-Zn ore deposit Ratibořské Hory-Stará Vožice near Tábor (southern Bohemia, Czech Republic). These samples come from the mineralogical collection of the National Museum in Prague. Pyrostilpnite forms tabular crystals or groups of small striated sharp crystals of red-orange to orange color up to 2.1 mm in size. Pyrostilpnite occurs in close association with pyrargyrite and dolomite. Pyrostilpnite is monoclinic, space group P21/c with the following unit-cell parameters refined from the PXRD studies: a 6.857(5) Å, b 15.851(6) Å, c 6.236(7) Å, β 117.2(5)° and V 603.1(8) Å3. Its empirical formula on the base of 7 apfu is Ag2.99Sb1.01S2.99.
    Type of Medium: Online Resource
    ISSN: 2570-7345 , 2570-7337
    URL: Issue
    URL: Journal
    URL: Article
    DOI: 10.46861/bmp.28
    DOI: 10.46861/bmp
    DOI: 10.46861/bmp.28.069
    Language: cs
    Publisher: Bulletin Mineralogie Petrologie
    Publication Date: 2020
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  • 4
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    Contribution to the chemical composition of minerals of the mimetite-pyromorphite series from the Guatomo mine near Tham Thalu, Bannang Sata District, Yala Province (Thailand)
    Bulletin Mineralogie Petrologie ; 2020
    In:  Bulletin Mineralogie Petrologie Vol. 28, No. 2 ( 2020), p. 237-245
    Details
    In: Bulletin Mineralogie Petrologie, Bulletin Mineralogie Petrologie, Vol. 28, No. 2 ( 2020), p. 237-245
    Abstract: The Guatomo mine is considered as one of the classic localities of mimetite worldwide. The chemical composition of six samples of minerals of mimetite-pyromorphite series from the Guatomo mine, representing different morphologies, colours as well as various geological environments/host rocks, was studied in detail by EMPA-WDS. This study revealed that both mimetite as well as pyromorphite are present at the Guatomo mine, representing rather variable compositional series ranging from the nearly end member mimetite (sample M1 - up to 0.03 apfu of P, sample M4 - up to 0.23 apfu of P and sample M5 with up to 0.18 apfu of P), through P-enriched mimetite (with 0.38 apfu of P) and As-rich pyromorphite (with 0.82 apfu of As, sample M2) up to As-enriched pyromorphite (sample M3 with As content reaching up to 1.03 apfu and sample M6 with up to 0.80 apfu of As). Besides of Pb, As, P and Cl only negligible amounts of Ca, V and S were detected in studied samples.
    Type of Medium: Online Resource
    ISSN: 2570-7345 , 2570-7337
    URL: Issue
    URL: Journal
    URL: Article
    DOI: 10.46861/bmp.28
    DOI: 10.46861/bmp
    DOI: 10.46861/bmp.28.237
    Language: cs
    Publisher: Bulletin Mineralogie Petrologie
    Publication Date: 2020
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  • 5
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    Recentní vznik limonitové bahenní železné rudy v Hulíně (niva řeky Moravy)
    Bulletin Mineralogie Petrologie ; 2020
    In:  Bulletin Mineralogie Petrologie Vol. 28, No. 2 ( 2020), p. 412-416
    Details
    In: Bulletin Mineralogie Petrologie, Bulletin Mineralogie Petrologie, Vol. 28, No. 2 ( 2020), p. 412-416
    Abstract: There is described a new occurrence of mud limonite iron ore in this paper. Limonite originates recently in streams situated in flood plain of the Morava River near Hulín (central Moravia, Czech Republic). The chemical composition of precipitated limonite indicates that a contamination of subterranean waters by phosphorus, arsenic and some transitional metals (Cr, Zn) occurs here, very probably due to long-lasting intense agricultural usage of the surrounding fields. Based on experimental precipitation of limonite from local well water, a probable mechanism of formation of limonite was outlined. The Fe2+ ions, dissolved in the subterranean waters, are after their seepage into the stream oxidized by aerial oxygen to Fe3+, which is subsequently hydrolysed and precipitated in form of solid iron hydroxide. An important role of microorganisms and/or organic matter during precipitation of limonite is not suggested by collected data.
    Type of Medium: Online Resource
    ISSN: 2570-7345 , 2570-7337
    URL: Issue
    URL: Journal
    URL: Article
    DOI: 10.46861/bmp.28
    DOI: 10.46861/bmp
    DOI: 10.46861/bmp.28.412
    Language: cs
    Publisher: Bulletin Mineralogie Petrologie
    Publication Date: 2020
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  • 6
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    Collinsit ze železnorudného dolu v Nučicích, nový minerál pro Českou republiku - popis a Ramanova spektroskopie
    Bulletin Mineralogie Petrologie ; 2022
    In:  Bulletin Mineralogie Petrologie Vol. 30, No. 1 ( 2022), p. 1-10
    Details
    In: Bulletin Mineralogie Petrologie, Bulletin Mineralogie Petrologie, Vol. 30, No. 1 ( 2022), p. 1-10
    Abstract: A very rare phosphate collinsite was found on historical samples of chamosite from the abandoned iron mine Nučice near Prague, Central Bohemia (Czech Republic) located in Ordovician sediments of the Barrandian area. Collinsite forms white to beige radial aggregates up to 15 mm in size composed by platy crystals with pearly lustre. Its chemical composition corresponds to empirical formula: (Ca1.87Sr0.12Ba0.01)Σ2.00(Mg0.57Fe0.41Al0.01)Σ0.99 (PO4)2.00·2H2O (Sr-rich zones) and (Ca1.98Sr0.01)Σ1.99(Mg0.58Fe0.40Al0.01)Σ0.99(PO4)2.00·2H2O (Sr-poor zones). Collinsite is triclinic, space group P-1, unit-cell parameters refined from X-ray powder diffraction data are a 5.734(3), b 6.779(3), c 5.441(2) Å, α 97.33(4)°, β 108.52(3)°, γ 107.25(3)° and V 185.7(1) Å3. Collinsite was found in association with siderite in fissures of chamosite iron ore.
    Type of Medium: Online Resource
    ISSN: 2570-7345 , 2570-7337
    URL: Issue
    URL: Journal
    URL: Article
    DOI: 10.46861/bmp.30
    DOI: 10.46861/bmp
    DOI: 10.46861/bmp.30.001
    Language: cs
    Publisher: Bulletin Mineralogie Petrologie
    Publication Date: 2022
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  • 7
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    Krystalograficky orientovaný srůst rutilu a ilmenitu a doprovodné minerály z Pasek nad Jizerou (krkonošsko-jizerské krystalinikum)
    Bulletin Mineralogie Petrologie ; 2022
    In:  Bulletin Mineralogie Petrologie Vol. 30, No. 1 ( 2022), p. 19-27
    Details
    In: Bulletin Mineralogie Petrologie, Bulletin Mineralogie Petrologie, Vol. 30, No. 1 ( 2022), p. 19-27
    Abstract: A detailed mineralogical study of a sample of quartz gangue containing macroscopically visible acicular rutile, which was collected in area of former Cu(-Ag) ore deposit NE from Paseky nad Jizerou, yielded a number of mineralogical findings. The mineralization is bound to strongly elongated quartz lenses, arranged conformably with schistosity of host phyllite of the Krkonoše-Jizera Crystalline Complex. Rutile is polysynthetically lamelled and compositionally zoned, with elevated contents of Fe (0.004 - 0.015 apfu), Nb (0.001 - 0.004 apfu), V (0.001 - 0.002 apfu) and W (0.000 - 0.006 apfu). It contains microscopic platy inclusions of ilmenite, which are regularly distributed in up to three crystallographic directions (probably cleavage planes) regardless of compositional zoning of host rutile. In addition, sporadic occurrence of aggregates composed of fluorapatite, phengitic muscovite and clinochlore was found too. The studied mineralization has metamorphic-secretory origin. The observed microstructural arrangement of inclusions of ilmenite in rutile host is very uncommon worldwide. With respect to evidently LP-LT origin of mineralization, we interpret its origin not in terms of exsolution but in terms of younger hypogene alteration of pre-existing rutile by fluids with relatively low Eh. The activity of such “suitable” fluids can be illustrated during crystallization of chlorite, which was formed at temperatures 137 - 160 °C and at log fO2 between -49.2 and -53.1 bar.
    Type of Medium: Online Resource
    ISSN: 2570-7345 , 2570-7337
    URL: Issue
    URL: Journal
    URL: Article
    DOI: 10.46861/bmp.30
    DOI: 10.46861/bmp
    DOI: 10.46861/bmp.30.019
    Language: cs
    Publisher: Bulletin Mineralogie Petrologie
    Publication Date: 2022
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  • 8
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    Wolframová a sulfidická hydrotermální mineralizace z Pekelského vrchu u Jihlavy (Česká republika)
    Bulletin Mineralogie Petrologie ; 2022
    In:  Bulletin Mineralogie Petrologie Vol. 30, No. 1 ( 2022), p. 73-94
    Details
    In: Bulletin Mineralogie Petrologie, Bulletin Mineralogie Petrologie, Vol. 30, No. 1 ( 2022), p. 73-94
    Abstract: The occurrence of tungsten mineralization of greisen type with the dominant ferberite and scheelite in quartz veins was detected in 1963 at the site Pekelský vrch near Jihlava. We conducted a detailed mineralogical research of the vein material sampled in the years 2020 - 2022. The dominating tungsten mineralization is represented especially by two chemically different types of ferberite, including relatively pure younger ferberite and older generation of ferberite containing substantial amounts of hübnerite (19 - 45 mol.%) and huanzalaite component (2.6 - 4.1 mol.%). Widespread scheelite replaces earlier ferberite, and is replaced by younger generation of ferberite. The Ti,W-rich columbite-(Fe) is an accessory phase associated with younger generation of ferberite. In addition to tungsten mineralization, there was recorded a varied sulphidic mineralization with dominating pyrite, chalcopyrite, galena, molybdenite and rare sulphosalts including matildite and gustavite, and locally also tellurosulphides (joséite-A and joséite-B), native bismuth and electrum. The supergene mineralization with Fe3+ hydroxides, bismutite, bismite, petitjeanite, kintoreite, corkite, plumbogummite, jarosite and iodargyrite is relatively rare. The gangue is dominated by quartz with flakes of low-F phengitic muscovite and rare siderite and fluorapatite. In addition, a fragment of an Al-rich rock, composed of corundum, andalusite, margarite and muscovite, was identified in the dump material. A total of 32 mineral species was found there.
    Type of Medium: Online Resource
    ISSN: 2570-7345 , 2570-7337
    URL: Issue
    URL: Journal
    URL: Article
    DOI: 10.46861/bmp.30
    DOI: 10.46861/bmp
    DOI: 10.46861/bmp.30.073
    Language: cs
    Publisher: Bulletin Mineralogie Petrologie
    Publication Date: 2022
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  • 9
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    Železářská struska z polykulturní archeologické lokality Boršice v podhůří Chřibů
    Bulletin Mineralogie Petrologie ; 2023
    In:  Bulletin Mineralogie Petrologie Vol. 31, No. 1 ( 2023), p. 18-24
    Details
    In: Bulletin Mineralogie Petrologie, Bulletin Mineralogie Petrologie, Vol. 31, No. 1 ( 2023), p. 18-24
    Abstract: A piece of iron slag was found on an archaeological site near Boršice on the SE margin of the Chřiby Mts., Czech Republic, which is known by occurrence of artifacts from the Early Neolithic (5700 - 5000 BC), Bronze and Early Medieval Ages. We present results of laboratory investigation of this slag. It is composed mainly of fayalite laths, which belong to two generations, less occur glass phase, wüstite and leucite, exceptionally also metallic iron. The composition of fayalite displays unified chemical trend and ranges in rather narrow span (Fa93.7-96.3 DCS1.1-5.8Fo0.0-5.0Te0.0-0.2). The glass phase contains in addition to common compounds (Si, Fe, Al, alkalis) also elevated contents of P and Ca. The microstructure of the studied slag as well as chemistry of individual phases are very homogeneous across the whole sample. We interpret this slag as an iron smelting slag, originated during production of iron from ores using the direct method. The used ore was in all probability a limonite bog ore, whereas the use of local fresh and/or weathered pelosiderites is not probable on the basis of the recorded phase composition and chemical compositions of individual phases.
    Type of Medium: Online Resource
    ISSN: 2570-7345 , 2570-7337
    URL: Issue
    URL: Journal
    URL: Article
    DOI: 10.46861/bmp.31
    DOI: 10.46861/bmp
    DOI: 10.46861/bmp.31.018
    Language: cs
    Publisher: Bulletin Mineralogie Petrologie
    Publication Date: 2023
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  • 10
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    Neobvyklá žilná Cu-Zn-Ag-Pb-As-Sb-Se-Sn-Bi mineralizace z Jedové jámy u Vejprt v Krušných horách (Česká republika)
    Bulletin Mineralogie Petrologie ; 2020
    In:  Bulletin Mineralogie Petrologie Vol. 28, No. 2 ( 2020), p. 385-405
    Details
    In: Bulletin Mineralogie Petrologie, Bulletin Mineralogie Petrologie, Vol. 28, No. 2 ( 2020), p. 385-405
    Abstract: An extraordinary rich mineral assemblage consisting of 27 minerals has been newly discovered in quartz veins of the abandoned ore deposit, once exploited by the Drei König Mine, called also Giftschacht (Jedová jáma - Toxic shaft), situated approximately 2 km SE of Vejprty town. It includes 16 sulphides (plus one unnamed) with far prevailing arsenopyrite. In addition to common sulphides (chalcopyrite, sphalerite, galena and minerals of the tetrahedrite group), a wide suite of sulphosalts with substantial Bi-content was identified. Besides common bismuthinite and emplectite, also relatively rare Bi minerals (matildite, aikinite, hammarite, wittichenite), in the Czech Republic known from few localities only, have been found here. Bi is bound also in a rather exotic selenide bohdanowitzite and native bismuth. Bi is substantially present in some domains of tetrahedrites [tetrahedrite-(Zn), tennantite-(Zn) and tennantite-(Fe)]. In addition to local Bi enrichment, also Sn-minerals occur in the ore, represented by cassiterite and rare sulphides (kësterite and stannoidite). The presence of phosphates of the plumbogummite group [plumbogummite, goyazite and florencite-(Ce)] contributes to the remarkable mineral assemblage. From geochemical point of view, very interesting is the presence of florencite-(Ce), in which REE with dominating Ce are fixed. In addition, grains of fluorite, fluorapatite, rutile, topaz and aggregates of illite and a phase from kaolinite group are present. Supergene mineralization is represented besides limonite by abundant scorodite and rare strengite.
    Type of Medium: Online Resource
    ISSN: 2570-7345 , 2570-7337
    URL: Issue
    URL: Journal
    URL: Article
    DOI: 10.46861/bmp.28
    DOI: 10.46861/bmp
    DOI: 10.46861/bmp.28.385
    Language: cs
    Publisher: Bulletin Mineralogie Petrologie
    Publication Date: 2020
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