Bulletin Mineralogie Petrologie最新文献

{"title":"Strusky z redukční tavby pelosideritové železné rudy realizované na hradě Buchlově (jv. Chřiby) v roce 2019: extrémní variabilita fázového složení a chemismu jednotlivých fází","authors":"Z. Dolníček, Ladislav Kandrnál, Jana Ulmanová, Ester Vratislavská, Pavel Hojač","doi":"10.46861/bmp.29.059","DOIUrl":"https://doi.org/10.46861/bmp.29.059","url":null,"abstract":"During experimental smelting of iron in a replica of historical shaft furnace, which was held at the Buchlov Castle in 2019, charcoal and fresh pelosiderite iron ore from the locality Moravany near Kyjov were used. The obtained furnace slag is practically completely formed by glass phase; only rare small domains contain also crystalline phases, whose occurrence is very irregular. A detailed study of chemical composition showed extreme heterogeneity in composition of glass and most crystalline phases. The glass phase contains variable, but often high amounts of Mn, Ca, Mg and sometimes P and/or K. The composition of olivine ranges widely among fayalite, dicalciumsilicate and tephroite (Fa1-91 Fo3-28Te2-45DCS1-52), as well as those of calcic pyroxene (Wo37-60Tsch1-13Ka8-22Fs4-30En14-36). Feldspars showed compositions between orthoclase and anorthite (Or2-82An9-91Ab5-19Cn0-2Slw0-2), which are unknown from natural systems. Minor components include wüstite, melilite (åkermanite with 1 - 6 mol. % gehlenite), leucite, kalsilite, locally also apatite and an unnamed phase with composition close to Ca2Al2Si3O11. The produced metallic iron is also compositionally heterogeneous and rich in phosphorus. The phase composition of slag differs significantly from those of typical iron slags. The reason can be seen in anomalous chemical composition of used ore, in too high temperatures during smelting (phase relations in metallic iron suggest temperatures around 1500 °C) in combination with rapid cooling of the furnace content after finishing of smelting, and probably also higher viscosity of slag melt. Both phase composition of slag as well as chemical composition of individual slag phases and metallic iron are significantly different from those of local historical artefacts from the period of usage of technology of direct production of iron. These findings do not support the idea that local pelosiderite iron ores were used for production of iron already during this early period.","PeriodicalId":53145,"journal":{"name":"Bulletin Mineralogie Petrologie","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"70598814","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Strusky a železo z experimentální tavby železa realizované na hradě Buchlově (jv. Chřiby) v roce 2018","authors":"Z. Dolníček, Ladislav Kandrnál, Jana Ulmanová, Ester Vratislavská, Pavel Hojač","doi":"10.46861/bmp.28.058","DOIUrl":"https://doi.org/10.46861/bmp.28.058","url":null,"abstract":"During experimental smelting of iron in a replica of historical shaft furnace, which was held at the Buchlov Castle in 2018, charcoal and Mn-enriched pelosiderite-limonite iron ore from the locality Strážovice near Kyjov were used. The obtained furnace slag is practically completely formed by glass phase; only rare small domains also contain olivine. The glass phase is compositionally heterogeneous and contains 0.7 - 10.7 wt. % MnO, whereas olivine corresponds to fayalite with elevated contents of tephroite (ca. 12 mol. %), forsterite (ca. 4 mol. %) and dicalciumsilicate (1 mol. %) components. The produced metallic iron is also compositionally heterogeneous, rich in phosphorus and in places it contains small spherical inclusions of pyrrhotite. The phase composition of slag differs significantly from those of typical iron slags. The reason can be seen either in anomalous chemical composition of used ore (the elevated contents of Mn could potentially act as an inhibitor of crystallization), or in too high temperatures during smelting (the phase relations in metallic iron suggest temperatures exceeding 1500 °C) in combination with rapid cooling of the furnace content after finishing of smelting. Both phase composition of slag as well as chemical composition of individual slag phases and metallic iron are significantly different from those of local historical artefacts from the period of usage of technology of direct production of iron. These findings do not support the idea that local pelosiderite iron ores were used for production of iron already during this early period.","PeriodicalId":53145,"journal":{"name":"Bulletin Mineralogie Petrologie","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2020-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"70597592","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Faujasit-Na a doprovodná zeolitová mineralizace z lokality Klučky u Polevska v Lužických horách (Česká republika)","authors":"P. Pauliš, Libor Hrůzek, Oldřich Janeček, J. Sejkora, Z. Dolníček, Luboš Vrtiška, Radana Malíková, Ondřej Pour, F. Fediuk","doi":"10.46861/bmp.28.417","DOIUrl":"https://doi.org/10.46861/bmp.28.417","url":null,"abstract":"Four new zeolite occurrences have been discovered in a forested, 3 km long ridge Klučky, composed of basaltic rocks and culminating in the 642 m high elevation of the same name NW of the Nový Bor town in the Lužické hory Mts. At the Wachstein locality, the first occurrence of the rare zeolite faujasite-Na in the Czech Republic was verified. It forms octahedral crystals up to 0.3 mm in size with common twins according to spinel law. The unit-cell parameter of faujasite-Na refined from the powder X-ray data is a 24.6775(9) Å and V 15028.1(9) Å3. Its chemical analyses correspond to the empirical formula (Na1.43Ca1.20K0.44Mg0.16)Σ3.23(Al3.33Si8.36)O24·15 H2O. Besides to phillipsite and chabazite, frequent offretite, characterised by its extraordinary morphological variety, is present in all described localities. The unit-cell parameters of offretite refined from the powder X-ray data are: a 13.311(6), c 7.5934(6) Å and V 1165.2(5) Å3 (Wachstein) and a 13.310(5), c 7.5886(5) Å and V 1164.3(4) Å3 (Klučky - Stráň). Chemical analyses of offretite correspond to the empirical formula K2.02Ca1.31Mg0.32Sr0.09(Al5.42Si12.56)O36·16 H2O (Wachstein) and Ca1.48K1.02Mg0.59Na0.10Sr0.09(Al5.56Si12.52)O36·16 H2O (Klučky - Stráň).","PeriodicalId":53145,"journal":{"name":"Bulletin Mineralogie Petrologie","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2020-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"70598208","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Fosfohedyfán z opuštěného železnorudného ložiska Hraničná (Slezsko, Česká republika)","authors":"J. Jirásek, D. Matýsek, Aneta Minaříková","doi":"10.46861/bmp.28.044","DOIUrl":"https://doi.org/10.46861/bmp.28.044","url":null,"abstract":"Abandoned iron skarn deposit Hraničná is located 16 km NW of Jeseník, Silesia, Czech Republic. It is situated in the Staré Město Crystalline Complex, belt of high grade metamorphic rocks, which suppose to be a meta-ophiolite of the initial Cambro-Ordovican rifting. The deposit itself is formed by two stratiform magnetite-hematite bands within the marbles and quartz-rich biotite gneisses. Marbles containing silicates are rich in Zn and Pb and give evidence for sedimentary of volcanosedimentary origin of the ore accumulation. We collected several samples at the adit and +20 m levels of the mine which yielded phosphohedyphane. Mineral forms irregular aggregates up to 100 μm within the calcite-dolomite-magnetite skarn. Its average chemical formula from 7 WDS spots is (Ca2.07Sr0.03Ba0.01Mg0.02Pb3.23Zn0.01Fe0.09Al0.01)Σ5.47[(PO4)2.53(AsO4)0.03(SO3)0.01(SiO4)0.24]Σ2.81[Cl1.05F0.20]Σ1.25 based on 13 O+Cl+F. Use of the normalization to Ca1 + Ca2 = 5 and employing the charge balance could lead to the possible presence of (CO3)2- up to 0.60 apfu, resp. 3.61 hm. % CO2; this possible content do not have any effect on mineral classification. It is, therefore, fifth reported occurrence of this mineral in the territory of the Czech Republic and the Bohemian Massif.","PeriodicalId":53145,"journal":{"name":"Bulletin Mineralogie Petrologie","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2020-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"70597399","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"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)","authors":"M. Števko, J. Sejkora, Z. Dolníček","doi":"10.46861/bmp.28.237","DOIUrl":"https://doi.org/10.46861/bmp.28.237","url":null,"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.","PeriodicalId":53145,"journal":{"name":"Bulletin Mineralogie Petrologie","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2020-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"70598045","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Supergénne minerály stratiformnej U-Cu mineralizácie pri Spišskej Teplici (hronikum, Kozie chrbty, východné Slovensko)","authors":"Štefan Ferenc, Eva Hoppanová, Richard Kopáčik, Tomáš Mikuš, Šimon Budzák","doi":"10.46861/bmp.28.295","DOIUrl":"https://doi.org/10.46861/bmp.28.295","url":null,"abstract":"Occurrence of infiltration, stratiform U-Cu mineralization Spišská Teplica - Vápenica-Vysová is located approximately 7.8 km SW from the district town Poprad and 4.3 km SW from the centre of Spišská Teplica village (Slovak Republic). Primary U-Cu mineralization is bound to arkosic sandstones with abundant coalified fragments of higher plants (Kravany Beds, Upper Permian, Hronicum Unit) and consists of uraninite and pyrite. The chalcopyrite and Cu-S mineral phase (digenite?, roxbyite?) form inclusions in clastic fluorapatite and zircon. Among supergene minerals, malachite and goethite are absolutely dominant, azurite, zálesíite and baryte are less represented. Phosphate, probably of the florencite group, and acanthite were only rarely found. Supergene uranyl minerals were not detected. Their lack, or their weak development in all uranium deposits in Kozie Chrbty Mts. can be explained as follows: during the weathering of primary ores, the cation UO22+ is released from uraninite and coffinite into supergene solutions (uranyl complexes). However, these solutions come into almost immediate contact with fragments of coalified flora (especially in the case of rich U ores), where UO22+ binds to the organic uranyl complexes (complexation). Only a relatively small part of uranyl cation escapes from this geochemical trap, and in that case supergene uranium minerals may precipitate.","PeriodicalId":53145,"journal":{"name":"Bulletin Mineralogie Petrologie","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2020-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"70598252","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Minerály „ottrélitových“ břidlic u Vápenného Podola v Železných horách (Česká republika)","authors":"J. Jirásek, D. Matýsek, M. Sivek","doi":"10.46861/bmp.28.339","DOIUrl":"https://doi.org/10.46861/bmp.28.339","url":null,"abstract":"From the belt of Ordovician metapelites in the Železné hory Mountains, ottrélite was described in 1882. Although the original paper stated the virtual absence of manganese, many papers and books from the 20th century copied just the original name of the mineral, without respect to its chemistry. Since the quantitative analysis was not available, we decided to revise this occurrence. Material newly collected in the vicinity of the Bučina Hill (606 m a.s.l.) SW from the Vápenný Podol village fits the original description, i.e. felsic rocks rich in quartz and illite-muscovite, with significant schistosity and abundant porphyroblasts of dark green mineral of the chloritoid group up to 3 mm large. Rietveld refinement of powder X-ray diffraction using different input structural models gave the best fit (the lowest RBragg) for the triclinic chloritoid of P-1 space group. Unit cell parameters are as follow: a = 5.483(1), b = 5.479(1), c = 9.1476(5) Å, α = 83.452(10)°, β = 76.639(11)°, γ = 59.993(15)°. Its average formula from seven WDS spots is (Fe0.83Mg0.17Mn0.01)Σ1.01 Al1.97(SiO4)Σ1.02O0.92(OH)2.00, and therefore must be classified as a chloritoid. As accessory minerals in the schist, we found rutile crystals and aggregates, prismatic zircons, a mineral from the chlorite group, and paragonite. Attention was paid to the unexpected occurrence of possibly primary rare grains of xenotime-(Y) up to 10 μm with average formula (Y0.71Sm0.01Gd0.03Tb0.01Dy0.07Ho0.01Er0.05Tm0.01Yb0.04Lu0.01)Σ0.96(P1.02Si0.01)Σ1.03O4.00 and more common rhabdophane-(Ce), which forms acicular, partly skeletal crystals in cavities, possibly after leached apatite. Its average formula is Y0.01La0.18 Ce0.40Pr0.04Nd0.15Sm0.03Eu0.01Gd0.04Al0.02Ca0.18Fe0.04Th0.02)Σ1.12(P0.95Si0.01S0.01)Σ0.97O4.00·0.97 H2O. We suggest using the term “chloritoid schist” for these metapelites formed at the contact of Middle to Late Ordovician graphite shales with the intrusion of the Variscan biotite granite of the Železné Hory Mts. Plutonic Complex.","PeriodicalId":53145,"journal":{"name":"Bulletin Mineralogie Petrologie","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2020-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"70597885","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Vzácný allanpringit - produkt alterace fluorwavellitu z lomu Milina u Zaječova (Česká republika)","authors":"Luboš Vrtiška, Václav Zemek, Radana Malíková","doi":"10.46861/bmp.28.126","DOIUrl":"https://doi.org/10.46861/bmp.28.126","url":null,"abstract":"A very rare phosphate allanpringite was found in the abandoned quarry Milina near Zaječov, Czech Republic in Ordovician sediments of the Barrandian area. Allanpringite forms yellow powder and earthy aggregates. In a more detailed study using SEM microscope, allanpringite forms rod-shaped and tabular crystals. Its origin is associated with alteration of fluorwavellite. Empirical formula of the allanprigite is (Fe2.70Al0.24)Σ2.94(PO4)2.00(OH)2.83·5H2O and refined unit-cell parameters are a 9.774(5), b 7.361(3), c 17.826(8) Å, β 92.2(6)° and V 1281.5(9) Å3. Allanpringite was found in association with jarosite, variscite and partly altered fluorwavellite.","PeriodicalId":53145,"journal":{"name":"Bulletin Mineralogie Petrologie","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2020-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"70597549","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Minerály řady ullmannit - gersdorffit v asociaci s milleritem z haldy dolu Lill v Příbrami (Česká republika)","authors":"J. Sejkora, Jakub Plášil, J. Špalek, Pavel Škácha","doi":"10.46861/bmp.28.203","DOIUrl":"https://doi.org/10.46861/bmp.28.203","url":null,"abstract":"Minerals of the ullmannite–gersdorffite solid-solution was found at mine dump material from the Lill mine, the Černojamské ore deposit, Příbram, central Bohemia, Czech Republic. It forms grey groups of idiomorphic crystals up to 0.5 mm across with metallic luster on millerite crystals. It is strongly chemically zoned, from As-rich ullmannite to gersdorffite with variable Sb contents. Its unit-cell parameter, a 5.7728(13) Å and V 192.37(7) Å3, was refined from single-crystal X-ray data. Groups of acicular millerite crystals up to 4 mm in length and formula (Ni0.97Co0.03)Σ1.00S1.01 and very rare siegenite grains up to 80 μm and formula Co1.00(Ni1.66Co0.24Fe0.02)Σ1.92S4.09 were found in association.","PeriodicalId":53145,"journal":{"name":"Bulletin Mineralogie Petrologie","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2020-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"70597679","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Mineralogie antimonového výskytu Mikulovický vrch u Kadaně (Česká republika)","authors":"J. Sejkora, P. Pauliš, Roman Gramblička, Ondřej Pour","doi":"10.46861/bmp.28.048","DOIUrl":"https://doi.org/10.46861/bmp.28.048","url":null,"abstract":"Two rare sulfosalt minerals, fülöppite and plagionite, have been determined in samples from a small abandoned Sb occurrence Mikulovický vrch near Kadaň, northern Bohemia, Czech Republic. The more abundant fülöppite forms grey aggregates (up to 5 mm in size) with metallic lustre in quartz gangue and rare crystals up to 1.5 mm across in association with stibnite, plagionite, sphalerite, pyrite and arsenopyrite. Fülöppite is monoclinic, space group C2/c with refined unit-cell parameters: a 13.443(2), b 11.737(2), c 16.953(2) Å, β 94.69(1)° and V 2665.9(5) Å3. Its empirical formula (mean of 93 point analyses) is (Pb2.80Sn0.01Hg0.01)Σ2.82Sb8.18S14.99. Two types of plagionite were found as irregular aggregates up to 200 μm in size in quartz gangue, ussualy in association with fülöppite. The first rarer one is close to the ideal composition with empirical formula (mean of 10 point analyses) (Pb4.90Hg0.01)Σ4.91Sb8.07S17.02; the second is distinctly Pb-poor with the calculated N homologue number in the range of 1.37 - 1.74 and empirical formula (mean of 62 point analyses) (Pb4.31Sn0.02Hg0.01)Σ4.34Sb8.53S17.13. Determination of fülöppite and Pb-poor plagionite were also confirmed by Raman spectroscopy. Gypsum, valentinite, native sulphur and jarosite were detected as products of weathering of primary mineralization.","PeriodicalId":53145,"journal":{"name":"Bulletin Mineralogie Petrologie","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2020-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"70597465","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}