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Wyświetlanie 1-15 z 159
Tytuł:
Ti remobilization and sulphide/sulphoarsenide mineralization in amphibolites: effect of granite intrusion (the Karkonosze–Izera Massif, SW Poland)
Autorzy:
Mochnacka, K.
Oberc-Dziedzic, T.
Mayer, W.
Pieczka, A.
Powiązania:
https://bibliotekanauki.pl/articles/2059096.pdf
Data publikacji:
2008
Wydawca:
Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
Tematy:
Karkonosze granite
Ti mineralization
hydrothermal sulphide/sulphoarsenide mineralization
contact metamorphism
Opis:
Our studies focus on ore mineralization in a contact-metamorphic aureole, using the Variscan Karkonosze Granite pluton as an example. The Karkonosze in trusion is enveloped by an Early Palaeozoic (about 500 Ma) metamorphic complex of the Izera–Kowary Unit composed of a diverse assemblage of gneisses, granitic gneisses, schists, amphibolites and marbles. The Budniki ore mineralization site was discovered in the early 1950's at the SE margin of the pluton. The uneconomic Ti-ox ide/sil i cate, Fe-Cu-Ni-Co-sulphide-sulphoarsenide, and uranium mineral deposits are hosted within amphibolites which were subjected to regional metamor phism fol lowed by contact meta - morphism. The Ti mineralization includes an ilmenite-titanite assemblage that originated from regional-metamorphic transformation of igneous Ti-bearing minerals, such as ilmenite and tschermakite, of the basic protoliths of amphibolites. During subsequent contact metamorphism, ilmenite was decomposed and, after wards, Al-rich titanite and rutile were formed. The Ti remobilization was coeval with an early stage of superimposed Fe-Cu-Ni-Co-sulphide/sulphoarsenide mineralization (pyrrhotite, pyrite, pentlandite, arsenopyrite, chalcopyrite, sphalerite and Fe-Ni-Co-As-S phases), related to the activity of the Karkonosze Granite hydrothermal system. The ore minerals formed successively within a wide range of temperatures (625–250gradeC).
Źródło:
Geological Quarterly; 2008, 52, 4; 349-349
1641-7291
Pojawia się w:
Geological Quarterly
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Enzymatic, urease-mediated mineralization of gellan gum hydrogel with calcium carbonate, magnesium-enriched calcium carbonate and magnesium carbonate for bone regeneration applications
Autorzy:
Douglas, T. E. L.
Łapa, A.
Samal, S. K.
Declercq, H. A.
Schaubroeck, D.
Mendes, A. C.
Voort, P. van der
Dokupil, A.
Plis, A.
Schamphelaere, K. de
Chronakis, I. S.
Pamuła, E.
Skirtach, A. G.
Powiązania:
https://bibliotekanauki.pl/articles/284285.pdf
Data publikacji:
2016
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Polskie Towarzystwo Biominerałów
Tematy:
biomaterials
mineralization
hydrogels
Źródło:
Engineering of Biomaterials; 2016, 19, 138; 110
1429-7248
Pojawia się w:
Engineering of Biomaterials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Biomimetically mineralized gelatin hydrogels produced by novel beta-radiation crosslinking
Autorzy:
Ward, D.
Riedel, S.
Kudlačková, R.
Ashton, L.
Douglas, T. E. L.
Powiązania:
https://bibliotekanauki.pl/articles/284564.pdf
Data publikacji:
2018
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Polskie Towarzystwo Biominerałów
Tematy:
hydrogels
tissue engineering
mineralization
Źródło:
Engineering of Biomaterials; 2018, 21, 148; 62
1429-7248
Pojawia się w:
Engineering of Biomaterials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Bioinspired, biomimetic, double-enzymatic mineralization of hydrogels for bone regeneration with calcium carbonate
Autorzy:
Lopez-Heredia, M. A.
Łapa, A.
Mendes, A. C.
Balcaen, L.
Samal, S. K.
Chai, F.
Voort, P. van der
Stevens, C. V.
Parakhonskiy, B. V.
Chronakis, I. S.
Vanhaecke, F.
Blanchemain, N.
Pamuła, E.
Skirtach, A. G.
Douglas, T. E. L.
Powiązania:
https://bibliotekanauki.pl/articles/285532.pdf
Data publikacji:
2016
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Polskie Towarzystwo Biominerałów
Tematy:
hydrogels
bone regeneration
mineralization
Źródło:
Engineering of Biomaterials; 2016, 19, 138; 109
1429-7248
Pojawia się w:
Engineering of Biomaterials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Acceleration of gelation and promotion of mineralization of chitosan hydrogels by alkaline phosphatase
Autorzy:
Douglas, T. E. L.
Skwarczyńska, A.
Modrzejewska, Z.
Balcaen, L.
Schaubroeck, D.
Lycke, S.
Vanhaecke, F.
Vandenabeele, P.
Dubruel, P.
Jansen, J. A.
Leeuwenburgh, S. C. G.
Powiązania:
https://bibliotekanauki.pl/articles/284363.pdf
Data publikacji:
2012
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Polskie Towarzystwo Biominerałów
Tematy:
chitosan
thermosensitivity
composite
mineralization
Opis:
Thermosensitive chitosan hydrogels containing sodium beta-glycerophosphate (ß-GP), whose gelation is induced by increasing temperature to body temperature, were functionalized by incorporation of Alkaline Phosphatase (ALP), an enzyme involved in mineralization of bone. ALP incorporation led to acceleration of gelation upon increase of temperature for four different chitosan preparations of differing molecular weight, as demonstrated by rheometric time sweeps at 37°C. Hydrogels containing ALP were subsequently incubated in calcium glycerophosphate (Ca-GP) solution to induce their mineralization with calcium phosphate (CaP) in order to improve their suitability as materials for bone replacement. Incorporated ALP retained its bioactivity and induced formation of CaP mineral, as confirmed by SEM, FTIR, Raman spectroscopy, XRD, ICP-OES, and increases in dry mass percentage, which rose with increasing ALP concentration and incubation time in Ca-GP solution. The results demonstrate that ALP accelerates formation of thermosensitive chitosan/ß-GP hydrogels and induces their mineralization with CaP, which paves the way for applications as injectable bone replacement materials.
Źródło:
Engineering of Biomaterials; 2012, 15, no. 116-117 spec. iss.; 135-136
1429-7248
Pojawia się w:
Engineering of Biomaterials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Extracellular polymeric substance of Rhodococcus opacus bacteria effects on calcium carbonate formation
Autorzy:
Szcześ, A.
Czemierska, M.
Jarosz-Wilkołazka, A.
Magierek, E.
Chibowski, E.
Hołysz, L.
Powiązania:
https://bibliotekanauki.pl/articles/109802.pdf
Data publikacji:
2018
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
calcium carbonate
exopolymer
mineralization
Opis:
An extracellular substance extracted from the bacterial strain Rhodococcus opacus was used as a template for calcium carbonate precipitation from CaCl2 and Na2CO3 solutions at 25 and 37 °C. Obtained crystals were characterized using scanning electron microscopy (SEM), X-ray diffraction (XRD) and Raman spectroscopy. Kinetics of precipitation was investigated by conductivity measurements. The obtained results show that the used biopolymer does not affect the crystal structure but acts as a nucleation centers leading to the formation of calcite crystals with the regular size. This effect is concentration dependent i.e. the EPS concentration increase causes the crystal size decreases, and is greater if calcium chloride solution if mixed with EPS 15 min before the addition of sodium carbonate solution. The temperature increase strengthens this effect.
Źródło:
Physicochemical Problems of Mineral Processing; 2018, 54, 1; 142-150
1643-1049
2084-4735
Pojawia się w:
Physicochemical Problems of Mineral Processing
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Occurrence and genetic relationships of uranium and thorium mineralization in the Karkonosze Izera Block (the Sudety Mts, SW Poland)
Wystąpienia mineralizacji uranowej i torowej w bloku Karkonosko-Izerskim i ich relacje genetyczne (Sudety, Polska)
Autorzy:
Mochnacka, K.
Banaś, M.
Powiązania:
https://bibliotekanauki.pl/articles/191278.pdf
Data publikacji:
2000
Wydawca:
Polskie Towarzystwo Geologiczne
Tematy:
uranium
thorium
vein-type mineralization
disseminated mineralization
Karkonosze-Izera Block
Karkonosze granite
Opis:
The paper summarizes available data on uranium and thorium deposits and occurrences in the Karkonosze-Izera Block (the Sudety Mts, SW Poland). The following types were distinguished: 1. Mineralization in the Karkonosze granite and its pegmatites: 1.1 disseminated broeggerite in granite, 1.2 uranium minerals filling the cracks in granite, 1.3 disseminated uranium and U-Th minerals in pegmatites, 2. Mineralization in the metamorphic cover: 2.1 uranium and thorium mineralization in nests, 2.2 pitchblende-fluorite mineralization in veins and nests, 2.3 pitchblende mineralization in veins and nests, 2.4 pitchblende-polymetallic mineralization in veins and nests, 2.5 vein- and nest-type secondary uranium mineralization, 2.5.1 secondary accumulations with traces of primary mineralization, 2.5.2 secondary accumulations without trace of primary mineralization. The origin of these accumulations is mostly related to the Karkonosze Granite and its hydrothermal activity.
W pracy przedstawiono informacje dotyczące występowania złóż i przejawów mineralizacji uranem i torem w bloku Karkonosko-Izerskim. Wyróżniono następujące typy okruszcowania: 1 Mineralizacja w granicie Karkonoszy i w pegmatytach 1.1. broeggeryt rozproszony w granicie, 1.2. mineralizacja uranowa wypełniająca szczeliny w granicie, 1.3. mineralizacja uranowa i uranowo-torowa w pegmatytach, 2. Mineralizacja w osłonie metamorficznej: 2.1. mineralizacja uranowa i torowa w postaci gniazd, 2.2. smółkowo-fluorytowa mineralizacja w formie żył i gniazd, 2.3. smółkowa mineralizacja w formie żył i gniazd, 2.4. smółkowo-polimetaliczna mineralizacja w formie żył i gniazd, 2.5. wtórna mineralizacja uranowa w formie żył i gniazd, 2.5.1 ze śladami mineralizacji pierwotnej, 2.5.2. bez mineralizacji pierwotnej. W większości przypadków są to wystąpienia genetycznie związane z granitem Karkonoszy i jego działalnością hydrotermalną.
Źródło:
Annales Societatis Geologorum Poloniae; 2000, 70, 2; 137-150
0208-9068
Pojawia się w:
Annales Societatis Geologorum Poloniae
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Composites of polyvinyl alcohol (PVA) hydrogel and calcium and magnesium phosphate formed by enzymatic functionalization
Autorzy:
Douglas, T. E. L.
Piegat, A.
Schaubroeck, D.
El Fray, M.
Dubruel, P.
Powiązania:
https://bibliotekanauki.pl/articles/285623.pdf
Data publikacji:
2012
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Polskie Towarzystwo Biominerałów
Tematy:
hydrogel
composite
mineralization
enzyme
Opis:
In this study, polyvinyl alcohol (PVA) hydrogels designed for osteochondral regeneration were mineralized with calcium phosphate (CaP) and magnesium phosphate (MgP) by incorporation of the enzyme alkaline phosphatase (ALP) and incubation in solutions of 0.1 M calcium or magnesium glycerophosphate (CaGP, MgGP). Hydrogels incubated in water served as controls. Dry mass percentage, i.e. the percentage consisting of polymer and mineral and not water, was markedly higher for samples incubated in CaGP and MgGP and decreased in the order: CaGP>MgGP>water. CaP and MgP formation was confirmed by FTIR. SEM revealed spherical deposits characteristic for apatite in samples incubated in CaGP and plate-like crystals of the magnesium phosphate bobierrite in samples incubated in MgGP, while samples incubated in water were devoid of deposits. Rheometric testing showed that storage modulus of hydrogels incubated in CaGP and MgGP was markedly higher and decreased in the order: CaGP>MgGP>water. The results prove the principle of enzymatic mineralization of PVA with CaP and MgP to improve their suitability for bone regeneration applications.
Źródło:
Engineering of Biomaterials; 2012, 15, no. 116-117 spec. iss.; 137-138
1429-7248
Pojawia się w:
Engineering of Biomaterials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Centra biomineralizacji (zwapnień) tkanek człowieka, Część 1
Centers of human tissue biomineraliztion (calcification), Part 1
Autorzy:
Pawlikowski, M.
Powiązania:
https://bibliotekanauki.pl/articles/343968.pdf
Data publikacji:
2018
Wydawca:
nakł. Maciej Pawlikowski
Tematy:
mineralizacja
tkanki
mineralization
tissue
Opis:
Biomineralizacja tkanek obejmuje zarówno procesy mineralizacji niezbędnej do funkcjonowania organizmu jak też mineralizacji dla organizmu szkodliwej. W artykule omówiono oba rodzaje mineralizacji zwracając szczególna uwagę na występowanie tzw. centrów krystalizacji czyli miejsc w których mineralizacja się rozpoczyna. Wyróżniono pierwotne centra krystalizacji i centra wtórne. Scharakteryzowano tworzacą się biomineralizację i omówiono jej skutki.
Biomineralization of tissues includes both mineralization processes that are necessary for the functioning of the organism and those that are harmful for it. This article discusses both types of mineralization, with particular focus on the occurrence of the so-called crystallization centers, i.e. places where the mineralization begins. Primary and secondary crystallization centers are distinguished. Characteristics of developing biomineralization and its consequences are discussed.
Źródło:
Auxiliary Sciences in Archaeology, Preservation of Relics and Environmental Engineering; 2018, 24; 1-14
1689-6742
Pojawia się w:
Auxiliary Sciences in Archaeology, Preservation of Relics and Environmental Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Bismuth minerals of the Beregovo ore field: mineral assemblages and spatial zonation (Transcarpathian, Ukraine)
Autorzy:
Biruk, S.V.
Skakun, L.Z.
Powiązania:
https://bibliotekanauki.pl/articles/2059386.pdf
Data publikacji:
2000
Wydawca:
Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
Tematy:
Transcarpathian
epithermal deposit
bismuth mineralization
Opis:
New compositional data on Bi-mineralization from ores of epithermal gold -(+copper)-silver-base metal deposits of the Beregovo ore field in the Ukraine are presented. The Bi-minerals are developed at deep levels of these deposits and occupy narrow zones at the limits of the ore bodies, Bi-sulphosalts from a temporal range (from early to late) of: Ag-Pb-Bi and Ag-Cu-Pb-Bi (+Pb-Cu-Bi) and Bi(2)S(3) Bi-minerals escaped from destruction during successive processes owing to their occurrence in a dense quartz matrix. Spatially Bi-mineralization is developed as a frontal zone of massive chalcopyrite aggregates.
Źródło:
Geological Quarterly; 2000, 44, 1; 39-46
1641-7291
Pojawia się w:
Geological Quarterly
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Calcium carbonate mineralization. Part II: effect of poly(ethylene glycol) and block copolymers molecular weight on formation of precipitate
Autorzy:
Polowczyk, I.
Bastrzyk, A.
Kozlecki, T.
Grzadka, E.
Sadowski, Z.
Powiązania:
https://bibliotekanauki.pl/articles/110696.pdf
Data publikacji:
2015
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
mineralization
block copolymers
PEG
calcite
Opis:
In this study the role of PEG and PEO-PPO-PEO block copolymers molecular weight in precipitation of calcium carbonate was examined. The CaCO3 particles were characterized by FTIR spectroscopy, X-ray, SEM and particle size distribution analysis. In absence and presence of modifiers, mixing of the reagents led to the formation of calcite crystals. The calcium carbonate obtained with poly(ethylene glycol) and block copolymers was characterized by smaller diameter in comparison with the one without modifiers. It was observed that using compounds with different molecular weights has no obvious effect on the form and properties of precipitated calcium carbonate particles.
Źródło:
Physicochemical Problems of Mineral Processing; 2015, 51, 2; 587-600
1643-1049
2084-4735
Pojawia się w:
Physicochemical Problems of Mineral Processing
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Mineralization and degradation of poly(ε -caprolactone) / hydroxyapatite electrospun membranes
Autorzy:
Rajzer, I.
Kwiatkowski, R.
Sarna, E.
Janicki, J.
Powiązania:
https://bibliotekanauki.pl/articles/285016.pdf
Data publikacji:
2011
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Polskie Towarzystwo Biominerałów
Tematy:
degradation
mineralization
electrospinning
simulated body fluid
Opis:
The aim of this work was to study mineralization and degradation behavior of poly(ε-caprolactone) membranes modified with hydroxyapatite. The membranes have been obtained by electrospinning method. In vitro mineralization and degradation processes were carried out in simulated body fluid (SBF) as the release medium. The weight loss of the samples, water uptakes, pH and calcium, potassium, sodium ions concentrations of the solutions were determined. The chemistry and microstructure of the membranes after different times of incubation in SBF were characterized using SEM, FTIR, and XRD methods. The results of in vitro study in SBF indicate that incorporation of n-HAp strongly activates precipitation of the apatite like materials on the surface of nanofibers.
Źródło:
Engineering of Biomaterials; 2011, 14, no. 106-108; 5-9
1429-7248
Pojawia się w:
Engineering of Biomaterials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The influence of mineralization conditions on the effectiveness of enzymatic mineralization of hydrogels
Autorzy:
Pietryga, K.
Reczyńska, K.
Pamuła, E.
Powiązania:
https://bibliotekanauki.pl/articles/285814.pdf
Data publikacji:
2015
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Polskie Towarzystwo Biominerałów
Tematy:
enzymatic mineralization
hydrogels
bone tissue engineering
Opis:
Polysaccharide hydrogels are widely used in food industry and medicine. Gellan gum (GG) recently gained a lot of attention as a promising material for tissue regeneration proposes due to its excellent biocompatibility and similarity to natural extracellular matrix. However, in unmineralized form it is not suitable for bone tissue engineering because of weak mechanical properties. Enzymatic mineralization (e.g. using alkaline phosphatase – ALP) is one of the methods of calcifying of hydrogels and it resembles natural processes occurring during bone healing. The aim of this research was to investigate mineralization of hydrogels and to improve properties of gellan gum scaffolds by adjusting processing conditions. Since ALP does not form with GG covalent bonds, during incubation in mineralization medium (solution of calcium glycerophosphate - CaGP) it is diffusing from the samples. Therefore, mineralization effectiveness depends on the interplay between incoming CaGP and outgoing ALP molecules. We hypothesize that better CaGP availability, especially in the first hours of incubation, can result in more effective and homogenous precipitation of calcium phosphates (CaP) in GG samples. To this end, samples with different GG and ALP concentration were subjected to two different mineralization regimes (more and less frequent CaGP exchanges). We proved that better CaGP availability (more frequent CaGP exchange) resulted in better mechanical properties (Young’s modulus) and more effective mineral formation (higher dry mass percentage) of the samples compared to the same samples mineralized with lower accessibility of CaGP. This may be related to the fact, that in presence of fresh organic substrates, more CaP are formed in the outer parts of the samples at the beginning of the process, that limit ALP diffusion and allow more uniform mineralization.
Źródło:
Engineering of Biomaterials; 2015, 18, 131; 2-7
1429-7248
Pojawia się w:
Engineering of Biomaterials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The mechanism of phosphate bacteria in increasing the solubility of phosphorus in Indonesian Andisols
Autorzy:
Tamad, -
Maas, Azwar
Hanudin, Eko
Widada, Jaka
Powiązania:
https://bibliotekanauki.pl/articles/1844351.pdf
Data publikacji:
2021
Wydawca:
Instytut Technologiczno-Przyrodniczy
Tematy:
adsorption
Andisols
mineralization
phosphate bacteria
solubilisation
Opis:
The purpose of this research was to determine: 1) phosphate bacteria (PB) mechanisms responsible for enhancing the soil’s soluble phosphorus (P), using the processes of inorganic P solubilisation, organic P mineralization, and blocking of soil colloidal adsorption site, and 2) to investigate the factors contributing to this increase. Phosphate bacteria (PB) was inoculated into sterile Andisols in three separate compositions, termed 1 kg P∙kg–1 (2.82 g phosphate rock, 0.5 g Ca3(PO4)2, 0.4 g Al3(PO4)2, or 0.4 g Fe3(PO4)2), organic P (0.5 cm3 para-Nitrophenylphosphate (pNPP) or 0.5 g Na-phytate), and 1 kg P (KH2PO4)∙kg–1, in order to analyse inorganic P solubilisation, organic P mineralization, and evaluate blocking soil colloidal site for adsorption P, respectively. Furthermore, spectrophotometry technique was applied to determine the amount of dissolved P. The PB showed an improvement in inorganic P solubilisation from 147.66 to 194.61 mg P∙kg–1, and also in organic P from 63.6 to 91.7 mg P∙kg–1, compared to control, (31.06 mg P∙kg–1) and (23.7 mg P∙kg–1), respectively. Meanwhile, the micro-organisms were known to decrease P adsorption by 13.43%, beyond the restraint set at 85.34%. Therefore, increased soluble P in Andisols is possibly expressed, using the equation as follows: soluble P (mg P∙kg–1) = 1201.96 + 1.18 inorganic P solubilisation (mg P∙kg–1) + 1.09 organic P mineralization (mg P∙kg–1) – 0.92 adsorption P (mg P∙kg–1) (R2 = 0.99).
Źródło:
Journal of Water and Land Development; 2021, 49; 188-194
1429-7426
2083-4535
Pojawia się w:
Journal of Water and Land Development
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Geochemistry of tetrahedrite group minerals and associated silver paragenesis in the Boguszów baryte deposit, Poland
Autorzy:
Mederski, Sławomir
Pršek, Jaroslav
Niemasz, Żaneta
Powiązania:
https://bibliotekanauki.pl/articles/2060128.pdf
Data publikacji:
2020
Wydawca:
Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
Tematy:
Boguszów
baryte veins
silver mineralization
tetrahedrite
Opis:
Primary ore mineralization in the abandoned Boguszów baryte-polymetallic deposit, located in the Intra-Sudetic Depression, was studied by reflected light microscopy and electron microprobe. Ore minerals, occurring as veinlets, irregular aggregates and lenses in baryte veins are hosted by the Upper Carboniferous Chełmiec rhyodacite laccolith. They are dominated by galena, sphalerite (with Cd up to 0.04 apfu) and tetrahedrite group minerals (TGM). Four generations of the TGM were distinguished accordl ng to textural features and Ag content: (1) low-Ag tetrahedrite-(Zn) (Ag: 0.22-0.6 apfu), (2) Ag-enriched tetrahedrite-(Zn) and Ag-enriched tetrahedrite-(Fe) (Ag: 0.71-1.45 apfu), (3) members of the freibergite series: “freibergite-(Fe)” and “freibergite-(Zn)” (Ag: 3.21-3.48 apfu; Hg: up to 0.75 apfu), (4) member of the “freibergite-(Fe)” series (Ag: 5.32-5.78 apfu). Several elongated inclusions of Ag-bearing sulphosalts within galena crystals were observed (members of the series “freibergite-(Fe)” and “freibergite-(Zn)”, pyrargyrite and polybasite). These polymetallic silver-bearing ores were mined in Boguszów from the 15th to the 19th century. Additionally, small grains of cobalt-enriched löllingite and gersdorffite were observed, which were formed from fluids sourced from the ultramafic basement. The textural characteristics of the ore, the mineral paragenesis and the chemical composition of individual ore minerals indicate low-temperature crystallization conditions.
Źródło:
Geological Quarterly; 2020, 64, 4; 958--968
1641-7291
Pojawia się w:
Geological Quarterly
Dostawca treści:
Biblioteka Nauki
Artykuł
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