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Wyświetlanie 1-15 z 52
Tytuł:
Department of Environmental Protection
Autorzy:
Ciszewski, D.
Powiązania:
https://bibliotekanauki.pl/articles/184294.pdf
Data publikacji:
2016
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
Tematy:
geochemistry
mineralogy
pollution
Źródło:
Geology, Geophysics and Environment; 2016, 42, 2; 252-255
2299-8004
2353-0790
Pojawia się w:
Geology, Geophysics and Environment
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
First Polish textbooks on mineralogy
Autorzy:
Narębski, W.
Powiązania:
https://bibliotekanauki.pl/articles/2086552.pdf
Data publikacji:
2009
Wydawca:
Polskie Towarzystwo Mineralogiczne
Tematy:
textbook
mineralogy
history
Polska
Opis:
First Polish textbooks on mineralogy, published between 1780s–1820s mostly in Vilna, are presented and their contents briefly discussed. Authors of these textbooks, lecturing at the Vilna University, being A. G. Werner’s students, played an important role in propagating most recent ideas in mineralogy and related sciences. They were also the authors of pioneer Polish mineralogical nomenclature, which corresponded to the internationally recognised terms.
Źródło:
Mineralogia; 2009, 40, 1/4; 31--42
1899-8291
1899-8526
Pojawia się w:
Mineralogia
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Chrysoprase – history and present
Autorzy:
Sachanbiński, Michał
Kuleba, Mirosław
Natkaniec-Nowak, Lucyna
Powiązania:
https://bibliotekanauki.pl/articles/2202386.pdf
Data publikacji:
2023
Wydawca:
Polskie Towarzystwo Mineralogiczne
Tematy:
chrysoprase
history
mineralogy
terminology
Opis:
The authors present the history of chrysoprase discovery and the progress of knowledge about this material over the millennia, based on the extended review of world literature. Tracing the oldest archaeological artifacts from before 9,000 years, the lens of history turns on a stone that has not been properly identified mineralogically for centuries. In the 1830s, chrysoprase was finally included into the chalcedony group and its green color was associated, very correctly, with nickel compounds dispersed in its structure. After all, the most current mineralogy of chrysoprase is presented on the basis of the results of modern analytical studies. These data clearly indicate that chrysoprase is a mixture of several SiO2 polymorphs with varying degrees of structural order (opal, chalcedony, moganite, quartz). This radically changes the previous taxonomy of chrysoprase and its position in current mineralogical and petrographic systematics.
Źródło:
Mineralogia; 2023, 54, 1; 1--10
1899-8291
1899-8526
Pojawia się w:
Mineralogia
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
First Polish textbooks on mineralogy
Autorzy:
Narębski, Wojciech
Powiązania:
https://bibliotekanauki.pl/articles/2086514.pdf
Data publikacji:
2009
Wydawca:
Polskie Towarzystwo Mineralogiczne
Tematy:
textbook
mineralogy
history
Polska
Opis:
First Polish textbooks on mineralogy, published between 1780s–1820s mostly in Vilna, are presented and their contents briefly discussed. Authors of these textbooks, lecturing at the Vilna University, being A. G. Werner’s students, played an important role in propagating most recent ideas in mineralogy and related sciences. They were also the authors of pioneer Polish mineralogical nomenclature, which corresponded to the internationally recognised terms.
Źródło:
Mineralogia; 2009, 40, 1/4; 31--42
1899-8291
1899-8526
Pojawia się w:
Mineralogia
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Mineralogical description of sandur deposits from the forefield of the Renard Glacier (Wedel Jarlsberg Land, Spitsbergen) on the ground of heavy minerals
Autorzy:
Chlebowski, Roman
Powiązania:
https://bibliotekanauki.pl/articles/2052829.pdf
Data publikacji:
1991
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
Arctic
Spitsbergen
mineralogy
sandur deposits
Źródło:
Polish Polar Research; 1991, 12, 2; 215-222
0138-0338
2081-8262
Pojawia się w:
Polish Polar Research
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
New survey of lead and zinc ore mineralization in Republic of Kosovo
Autorzy:
Kołodziejczyk, J.
Prsek, J.
Qela, H.
Asllani, B.
Powiązania:
https://bibliotekanauki.pl/articles/184232.pdf
Data publikacji:
2012
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
Tematy:
ore mineralogy
Kosovo
Trepca deposit
Opis:
Kosovo lead and zinc ore deposits are located in the Trepca Belt which extends for over 80 km. Several ore deposits occur in that belt, with the most important - Stan Terg (Trepca). Stan Terg deposit originating at the contact between volcanic breccias and carbonate rocks. Two different types of mineralization can be distinguished. The older one has origin related to pneumatolitic processes, when skarns were formed. The more recent one was formed by hydrothermal processes and has the largest economic importance. Over 70 minerals have been recognized in the Trepca deposit. Further mineralogical investigations will allow for the identification of other rare minerals.
Źródło:
Geology, Geophysics and Environment; 2012, 38, 3; 295-305
2299-8004
2353-0790
Pojawia się w:
Geology, Geophysics and Environment
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Mineralogical investigation of stone implements, Lerna Archaeological site, Greece
Autorzy:
Pawlikowski, M.
Such, J.
Powiązania:
https://bibliotekanauki.pl/articles/343979.pdf
Data publikacji:
2006
Wydawca:
nakł. Maciej Pawlikowski
Tematy:
mineralogia
zabytki kamienne
mineralogy
stone-monuments
Źródło:
Auxiliary Sciences in Archaeology, Preservation of Relics and Environmental Engineering; 2006, 1; 1-38
1689-6742
Pojawia się w:
Auxiliary Sciences in Archaeology, Preservation of Relics and Environmental Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Microanalysis study of Al-Amar rock and leaching behavior of its tailings for recovery of gold and silver
Autorzy:
Mahmoud, M. H. H.
Awad, H. M.
Altalhi, T.
Powiązania:
https://bibliotekanauki.pl/articles/109620.pdf
Data publikacji:
2018
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
gold
silver
tailings
mineralogy
extraction
thiosulfate
Opis:
Some Saudi gold ores, such as that at Al-Amar mine, suffer from low leaching efficiency using the toxic cyanidation process. Only about 60% of the gold and 26% of the silver in the feed ore can be extracted at 0.2% CN– after 24 h and the rest percentages of these metals remained in leaching residues (tailings). These tailings contained 1.1 ppm Au and 4.3 ppm Ag. Reprocessing of tailings serves both for economic and environmental reasons. A petrography analysis of the mineral constituents indicated that the rock samples consisted primarily of sphalerite, chalcopyrite, pyrite and galena in decreasing order of abundance. An electron probe microanalysis quantitatively showed that gold and silver were finely distributed in the grain boundaries and within sphalerite, chalcopyrite, pyrite, and quartz. The dissemination of gold and silver in these hard minerals may be the main reason for their low recovery by cyanidation. Open air roasting of the tailings can release amounts of the disseminated gold and silver which can be extracted during leaching with the harmless thiosulfate ion S2O32–. After studying the different parameters, we found that the maximum possible extraction of gold and silver from the tailings roasted for 2 h at 400°C reached about 50% at 0.2 M ammonium thiosulfate, 0.3 M ammonium hydroxide, solid–liquid ratio ½ for 24 h. These achievements represent a possible exploitation of the accumulated 1.65 million Mg tailing waste containing significant amounts of gold and silver valued at about $73 million.
Źródło:
Physicochemical Problems of Mineral Processing; 2018, 54, 2; 527-537
1643-1049
2084-4735
Pojawia się w:
Physicochemical Problems of Mineral Processing
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Time constraints on experimental studies of lead apatites
Autorzy:
Topolska, Justyna
Bajda, Tomasz
Puzio, Bartosz
Manecki, Maciej
Kozub-Budzyń, Gabriela
Powiązania:
https://bibliotekanauki.pl/articles/2058621.pdf
Data publikacji:
2019
Wydawca:
Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
Tematy:
pyromorphite
vanadinite
experimental mineralogy
dissolution
solubility synthesis
Opis:
The paper presents the results of experimental studies on the synthesis and thermodynamic stability of selected Pb-apatites in terms of criteria determining termination of the experiments. Based on the case study, we indicate difficulties in analysing the obtained experimental data. Time-resolved sampling of precipitate formed during a dropwise synthesis of pyromorphite was performed and the results were compared to the literature data. It has been concluded that the Ostwald ripening time for synthesized solids depends primarily on the chemical composition of the intended Pb-apatite phase. We presented that heterogeneity of precipitate affects its dissolution in terms of repeatability of the results and equilibrating time. A unique 9-year-long experiment on vanadinite stability at a pH range from 2.0-6.0 revealed that among all tested dissolution conditions only the reactions at the pH = 3.5 can perform as the basis for some thermodynamic calculations. It has been concluded that the rate of phase transitions in the Pb-apatites group can be misleading in terms of determining the equilibrium of the system, and the experimental setup designed particularly to provide reliable controls in this aspect should be involved. Means in this respect have been proposed.
Źródło:
Geological Quarterly; 2019, 63, 4; 721--728
1641-7291
Pojawia się w:
Geological Quarterly
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Geochemistry of the Igdekoy-Doganlar Na-Ca borate deposit, Emet Province (western Anatolia, Turkey)
Autorzy:
Koçak, İsmail
Powiązania:
https://bibliotekanauki.pl/articles/2060268.pdf
Data publikacji:
2020
Wydawca:
Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
Tematy:
REE
trace element
borate
mineralogy
ulexite
probertite
Opis:
Borates at the Igdekoy-Doganlar locality were deposited in a Miocene lacustrine environment during periods of Paleogene to Early Quaternary volcanic activity. The mineral paragenesis consists of probertite – NaCaB5O7(OH)4 3H2O, ulexite - NaCa[B5O6(OH)6] · 5H2O, hydroboracite - CaMg[B3O4(OH)3]2 3H2O, colemanite - Ca[B3O4(OH)3] · H2O, halite, anhydrite, glauberite, smectite and illite. The major element, Ca, is higher in the lgdekoy-Doganlar deposits compared to the averages for andesite and the Earth's crust. Within the trace elements, notable enrichment is identified in Li, Se, As, Sb, Sr and Cs. Lithium and Se occur in sufficient concentrations to be considered as economically valuable by-products. B and Sr anomalies can be used as an important marker in the exploration for boron deposits. The Y/Ho ratio of the lgdekoy-Doganlar borates is close to chondritic values. The negative Ce anomaly in borates from the lgdekoy-Doganlar deposit suggests that deposition occurred under oxidative conditions. The Eu and Ce anomalies reflect a hydrothermal contribution of REE. Geochemical and geological data suggest that the lgdekoy-Doganlar borate deposits were formed in high-pH playa lakes that were discharged from volcanic and terrestrial environments under evaporative conditions due to the effect of arid-semi arid climate.
Źródło:
Geological Quarterly; 2020, 64, 3; 807--817
1641-7291
Pojawia się w:
Geological Quarterly
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Mineralogical investigation of selected phenomenon present in Kom C. Tell el-Farcha archaeological site : The Nile Delta - Egypt
Autorzy:
Pawlikowski, M.
Strzelczyk, J.
Powiązania:
https://bibliotekanauki.pl/articles/344076.pdf
Data publikacji:
2010
Wydawca:
nakł. Maciej Pawlikowski
Tematy:
Tell el Farkha
Egipt
mineralogia
Egypt
mineralogy
Opis:
Investigation of selected samples collected coming from Kom C at Tel el Farcha site were performed using various mineralogical methods. Examination were conducted in order to identify substances as well as to explain their origin. Samples represent material filling up old fireplaces, mineralized charcoal and organic mat, dark substances coating alabaster vessels and other.
Źródło:
Auxiliary Sciences in Archaeology, Preservation of Relics and Environmental Engineering; 2010, 10; 1-15
1689-6742
Pojawia się w:
Auxiliary Sciences in Archaeology, Preservation of Relics and Environmental Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Wyniki mineralogicznych i geochemicznych badań ewaporatów ze złoża Taudenni-Agorgott (Mali, Sahara Zachodnia)
Results of mineralogical and geochemical investigation of evaporates from the Taoudenni-Agorgott deposit (Mali, Western Sahara).
Autorzy:
Pająk, J.
Pawlikowski, M.
Powiązania:
https://bibliotekanauki.pl/articles/344097.pdf
Data publikacji:
2013
Wydawca:
nakł. Maciej Pawlikowski
Tematy:
Sahara Desert
evaporates
mineralogy
Taoudenni
Mali
halite
Opis:
Field as well as mineralogical and geochemical investigation of evaporates of Taoudenni-Agorgott deposit were performed. It was stated out that the profile is composed of halite, glauberite, gypsum, carbonates, quartz and clay minerals. The sequence of the presence of minerals at the profile suggests the deposit is the result of evaporation of salty lake during drying of climate at the Sahara Desert. Mineral composition of evaporates suggest that Na-Cl reach like evolved to Na-Ca-SO4 phase and next was fully evaporated and coated with detrital sediments.
Źródło:
Auxiliary Sciences in Archaeology, Preservation of Relics and Environmental Engineering; 2013, 16; 1-18
1689-6742
Pojawia się w:
Auxiliary Sciences in Archaeology, Preservation of Relics and Environmental Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Characterization of perlite powders from Izmir, Türkiye region
Autorzy:
Aksoy, Özay
Alyamaç, Elif
Mocan, Merve
Sütçü, Mücahit
Özveren-Uçar, Nihan
Özgür Seydibeyoğlu,, M.
Powiązania:
https://bibliotekanauki.pl/articles/2175435.pdf
Data publikacji:
2022
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
perlite
characterization
expanded perlite
particulate morphology
mineralogy
Opis:
Perlite is an amorphous volcanic glass-type rock which is collected in open mines in various parts of the world. In this study, eight different perlite samples, supplied from the mines located in the Bergama, Izmir region, were used. The perlite samples were structurally, morphologically, and mineralogically characterized via a wide range of analytical techniques such as Thermogravimetric Analysis (TGA), Fourier Transform Infrared Spectroscopy (FTIR), Brunauer-Emmett-Teller (BET) Surface Area Analysis, Optical Microscopy, Scanning Electron Microscopy (SEM), X-ray Diffraction (XRD), X-ray Fluorescence (XRF), and a liquid pycnometer. Platelet shaped-like structures were observed in the SEM analysis of the expanded perlites in contrast to the images of spongy or cracked expanded perlites reported in literature. The O-H bending and Si-O-Si vibrations (both asymmetric and symmetric stretching) of perlite structures were confirmed by FTIR. Highly amorphous phases with a rather low percentage of crystalline phases were observed by XRD. In the BET surface area analysis, expanded perlite materials exhibited higher surface area compared to unexpanded ones. A detailed characterization of perlite structures is essential as there is a significant potential to use these minerals in various biocomposite applications and it is useful to explain structure-property relationships in this class of materials.
Źródło:
Physicochemical Problems of Mineral Processing; 2022, 58, 6; art. no. 155277
1643-1049
2084-4735
Pojawia się w:
Physicochemical Problems of Mineral Processing
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Surface mineralization on Seymour Island, Antarctica
Autorzy:
Tatur, Andrzej
Barczuk, Andrzej
del Valle, Rodolfo
Sletten, Ronald
Kicińska, Ewa
Powiązania:
https://bibliotekanauki.pl/articles/2052735.pdf
Data publikacji:
1993
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
Antarctica
Seymour (Marambio) Island
weathering
mineralogy
microbiology
Źródło:
Polish Polar Research; 1993, 14, 2; 153-168
0138-0338
2081-8262
Pojawia się w:
Polish Polar Research
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Coupling mineralogy with physicochemical parameters in view copper flotation efficiency improvement
Autorzy:
Naumov, Dejan
Stamenov, Lachezar
Gaydardzhiev, Stoyan
Bouzahzah, Hassan
Powiązania:
https://bibliotekanauki.pl/articles/109556.pdf
Data publikacji:
2019
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
copper ore
flotation
quantitative mineralogy
physicochemical factors
Opis:
The Chelopech epithermal arsenic bearing high-sulphidation, copper-gold deposit located in Bulgaria is often considered as the richest European gold deposit. Selected physicochemical parameters have been measured at key flotation streams inside the processing plant. Sampling campaign has followed with samples being submitted to chemical and mineral liberation analyses. A quantitative analysis has enabled to link copper flotation response to the type of copper bearing minerals and physiochemical parameters such as redox potential (Eh), dissolved oxygen (DO), EDTA extractable Cu and Fe. Data from the mineral liberation analysis (MLA) have highlighted an important process- relevant information explaining the variable floatability in different particle size ranges. A low chalcopyrite recovery can be linked to the non-sufficient amount of dissolved oxygen inside the copper selective flotation. Given the finely-disseminated copper bearing minerals, copper losses due to particle locking could be suggested as well.
Źródło:
Physicochemical Problems of Mineral Processing; 2019, 55, 3; 701-710
1643-1049
2084-4735
Pojawia się w:
Physicochemical Problems of Mineral Processing
Dostawca treści:
Biblioteka Nauki
Artykuł
Wyświetlanie 1-15 z 52

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