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Wyszukujesz frazę "Krzykawski, Tomasz" wg kryterium: Autor


Tytuł:
Trynityt – wstępne dane SEM oraz XRD szkliwa nuklearnego z USA
Preliminary SEM and XRD investigation on nuclear trinitite from USA
Autorzy:
Brachaniec, Tomasz
Szopa, Krzysztof
Krzykawski, Tomasz
Broszkiewicz, Adam
Powiązania:
https://bibliotekanauki.pl/articles/1033027.pdf
Data publikacji:
2015
Wydawca:
Polskie Towarzystwo Meteorytowe
Tematy:
XRD
glass
nuclear bomb
tektite
trinitite
Opis:
Trinitite is a glass produced as a result of a nuclear explosion. The characteristic feature of the investigated material are bubbles and presence of incompletely melted quartz grains.
Źródło:
Acta Societatis Metheoriticae Polonorum; 2015, 6; 38-41
2080-5497
Pojawia się w:
Acta Societatis Metheoriticae Polonorum
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Migracja żelaza w indochinicie podczas jego wygrzewania w 1100°C: badania EMPA i XRD
Iron migration in indochinite during heating in 1100°C: EMPA and XRD investigation
Autorzy:
Brachaniec, Tomasz
Szopa, Krzysztof
Krzykawski, Tomasz
Broszkiewicz, Adam
Powiązania:
https://bibliotekanauki.pl/articles/1033002.pdf
Data publikacji:
2014
Wydawca:
Polskie Towarzystwo Meteorytowe
Tematy:
heating
indochinite
iron
tektites
Opis:
Iron reach tektite represented by indochinite was examined by using EMP and XRD after 120 min long heating in oxide atmosphere at 1100°C. The electron microprobe analyses as well as BSE images reveal loss of iron in tektite bulk composition. Iron as a element was incorporated into a new, probable mineral phase that is mostly present on the surface of the indochinite. Size and textural relation of the Fe-rich phase does not permit to analize it. XRD data does not reveal presence of any mineral rich in Fe including metallic iron.
Źródło:
Acta Societatis Metheoriticae Polonorum; 2014, 5; 47-51
2080-5497
Pojawia się w:
Acta Societatis Metheoriticae Polonorum
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Fragmenty kopalnego meteorytu z Lechówki: charakterystyka mineralogiczna i geochemiczna
Fragments of strongly weathered meteorite from Lechówka: mineralogical and geochemical characterisation
Autorzy:
Szopa, Krzysztof
Karwowski, Łukasz
Krzykawski, Tomasz
Brachaniec, Tomasz
Powiązania:
https://bibliotekanauki.pl/articles/1033087.pdf
Data publikacji:
2017
Wydawca:
Polskie Towarzystwo Meteorytowe
Tematy:
Cretaceous-Paleogene boundary
Lechówka
fossil iron meteorites
kamacite
meteorites
paleometeorite
schreibersite
taenite
Opis:
Fossil iron meteorites are extremely rare in the geological sedimentary record. In the boundary clay from the outcrop at the Lechówka quarry (Poland), fragments of the paleometeorite were found in the Cretaceous-Paleogene boundary clay layer. The fragments of meteorite (2–6 mm in size) and meteoritic dust are metallic-grey in colour. Analyses of the meteorite from Lechówka reveal the presence of Ni-rich minerals with a total Ni amount of 2–3 wt%. They are represented by: taenite, kamacite, schreibersite, Ni-rich magnetite, and Ni-rich goethite. The investigated remnants of paleometeorite apparently represent an independent fall and does not seem to be derived from the K-Pg impactor.
Źródło:
Acta Societatis Metheoriticae Polonorum; 2017, 8; 100-109
2080-5497
Pojawia się w:
Acta Societatis Metheoriticae Polonorum
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Jak odróżnić oryginał od fałszywek: kopalny meteoryt z Lechówki
How to distinguish the original from fakes: the fossil meteorite from Lechówka
Autorzy:
Szopa, Krzysztof
Karwowski, Łukasz
Krzykawski, Tomasz
Brachaniec, Tomasz
Powiązania:
https://bibliotekanauki.pl/articles/1033111.pdf
Data publikacji:
2018
Wydawca:
Polskie Towarzystwo Meteorytowe
Tematy:
Lechówka meteorite
fake meteorite
fossil meteorite
Opis:
Value of meteorites can be explained at least in two aspects. From the scientific point of view they are priceless objects, which can bring important information about the very beginning of the Universe. Because of their rarity anduniqueness, the meteorites often are extremely expensive in the term of a commercial value. This situation is used by dishonest sellers who offer fake meteorites. It has happened with the paleometeorite remnants, which were originallyfound in Cretaceous-Paleogene clay boundary in Lechówka, Poland. The so-called fake Lechówka remnants were offered by one seller on domestic online shops. All grains had certificate of authenticity that was included with the sold grains. In this paper we described the most common and diagnostic features, which can be easily applied to distinguish the original meteorite remnants from the fake ones.
Źródło:
Acta Societatis Metheoriticae Polonorum; 2018, 9; 112-122
2080-5497
Pojawia się w:
Acta Societatis Metheoriticae Polonorum
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Rare earth elements, uranium, and thorium in ashes from biomass and hard coal combustion/co-combustion
Pierwiastki ziem rzadkich, uran i tor w popiołach ze spalania/współspalania biomasy i węgla kamiennego
Autorzy:
Adamczyk, Joanna
Smołka-Danielowska, Danuta
Krzątała, Arkadiusz
Krzykawski, Tomasz
Powiązania:
https://bibliotekanauki.pl/articles/27311666.pdf
Data publikacji:
2023
Wydawca:
Polska Akademia Nauk. Instytut Gospodarki Surowcami Mineralnymi i Energią PAN
Tematy:
biomass combustion
biomass co-combustion
hard coal
ash from combustion
rare earth elements
mineral composition
spalanie biomasy
współspalanie biomasy
węgiel kamienny
popiół ze spalania
pierwiastki ziem rzadkich
skład mineralny
Opis:
This study presents the results of concentrations of rare earth elements and yttrium (REY), uranium (U), and thorium (Th) in ashes from combustion/co-combustion of biomass (20%, 40%, and 60% share) from the agri-food industry (pomace from apples, walnut shells, and sunflower husks) and hard coal. The study primarily focuses on ashes from the co-combustion of biomass and hard coal, in terms of their potential use for the recovery of rare earth elements (REE), and the identification of the sources of these elements in the ashes. Research methods such as ICP-MS (inductively coupled plasma mass spectrometry), XRD (X-ray diffraction), and SEM-EDS (scanning electron microscopy with quantitative X-ray microanalysis) were used. The total average content of REY in ash from biomass combustion is 3.55-120.5 mg/kg, and in ash from co-combustion, it is from 187.3 to 73.5 mg/kg. The concentration of critical REE in biomass combustion ash is in the range 1.0-38.7 mg/kg, and in co-combustion ash it is 23.3-60.7 mg/kg. In hard-coal ash, the average concentration of REY and critical REY was determined at the level of 175 and 45.3 mg/kg, respectively. In all samples of the tested ashes, a higher concentration of Th (0.2-14.8 mg/kg) was found in comparison to U (0.1-6 mg/kg). In ashes from biomass and hard-coal combustion/co-combustion, the range of the prospective coefficient (Coutl) is 0.66-0.82 and 0.8-0.85, respectively, which may suggest a potential source for REE recovery. On the basis of SEM-EDS studies, yttrium was found in particles of ashes from biomass combustion, which is mainly bound to carbonates. The carriers of REY, U, and Th in ashes from biomass and hard-coal co-combustion are phosphates (monazite and xenotime), and probably the vitreous aluminosilicate substance.
W pracy przedstawiono wyniki stężeń pierwiastków ziem rzadkich i itru (REY), uranu (U), oraz toru (Th) w popiołach ze spalania/współspalania biomasy (udział 20, 40 i 60%) z przemysłu rolno-spożywczego (wytłoki z jabłek, łupiny orzecha włoskiego i łuski słonecznik), i węgla kamiennego. W pracy zwrócono uwagę przede wszystkim na popioły ze współspalania biomasy i węgla kamiennego, pod kątem ich potencjalnego wykorzystania do odzysku pierwiastków ziem rzadkich (REE), oraz identyfikacji źródeł tych pierwiastków w popiołach. Zastosowano metody badawcze takie jak ICP-MS (spektrometria mas ze wzbudzeniem w plazmie indukcyjnie sprzężonej), XRD (dyfrakcja rentgenowska) i SEM-EDS (skaningowa mikroskopia elektronowa z ilościową mikroanalizą rentgenowską). Całkowita średnia zawartość REY w popiołach ze spalania biomasy wynosi 3,55-120,5 mg/kg, a w popiołach ze współspalania od 73,5 do 187,3 mg/kg. Średnie stężenie krytycznych REE w popiołach ze spalania biomasy mieści się w zakresie 1,0-38,7 mg/kg, a w popiołach ze współspalania 23,3-60,7 mg/kg. W popiele z węgla kamiennego średnie stężenie REY i krytycznych REY oznaczono odpowiednio na poziomie 175 i 45.3 mg/kg. W próbkach badanych popiołów oznaczono wyższe stężenie Th (0,2-14,8 mg/kg), w porównaniu do U (0,1-6 mg/kg). W popiołach ze spalania/współspalania biomasy i węgla kamiennego zakres wartości współczynnika perspektywicznego (Coutl) wynosi odpowiednio 0,66-0,82 i 0,8-0,85, co może sugerować potecjalne źródło do odzysku REE. Analiza cząstek popiołów ze spalania biomasy wykazała itr, który związany jest głównie z węglanami. Nośnikami REY, U i Th w popiołach ze współspalania biomasy i węgla kamiennego są fosforany: monacyt i ksenotym, oraz prawdopodobnie szklista substancja glinokrzemianowa.
Źródło:
Gospodarka Surowcami Mineralnymi; 2023, 39, 2; 87--108
0860-0953
Pojawia się w:
Gospodarka Surowcami Mineralnymi
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Topliwość tektytów
Tektites melting
Autorzy:
Brachaniec, Tomasz
Szopa, Krzysztof
Krzykawski, Tomasz
Broszkiewicz, Adam
Szczyrba, Mirosław
Powiązania:
https://bibliotekanauki.pl/articles/1032996.pdf
Data publikacji:
2014
Wydawca:
Polskie Towarzystwo Meteorytowe
Tematy:
experiment
melting
tektites
temperature
Opis:
In this paper, results of melting experiment of tektites are presented. Tektites from four strewnfields: North American, Central European, Ivory Coast and Australasian were used. The fragments of investigated tektites were heated in oxide atmosphere in 1100oC in two time intervals: 5 and 120 minutes. The temperature of 1100oC is too low for completely melting of the studied material despite to heating in the same conditions but in small area (eg. in a spot).
Źródło:
Acta Societatis Metheoriticae Polonorum; 2014, 5; 21-24
2080-5497
Pojawia się w:
Acta Societatis Metheoriticae Polonorum
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
X-ray diffraction studies of onshore mud volcanoes in parts of the Upper Benue Trough, northeastern Nigeria
Autorzy:
Musa, Ojochenemi K.
Kurowska, Ewa E.
Krzykawski, Tomasz
Onimisi, Jimoh A.
Powiązania:
https://bibliotekanauki.pl/articles/2055852.pdf
Data publikacji:
2021
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
Tematy:
mud volcano
weathered rocks
soft overburden
mineral composition
Opis:
The mineralogical studies of clay from the onshore mud volcanoes discovered in parts of the Upper Benue Trough of Nigeria provide a clue about the geological formation from which the extruded mud originates. The study area is a part of the Cretaceous Upper Benue Trough filled with Early Cretaceous continental deposits and Late Cretaceous marine deposits, having a history of magmatism dating from the Albian to the Pleistocene. The study approach involves integrated inorganic geochemical analysis of the samples to reveal their composition and origin. The results of XRD analysis of the fresh clays from the mud volcano revealed the presence of quartz, kaolinite, and other clay minerals (illite-smectite), feldspars, and in a much lower quantities, other accessory minerals including muscovite, evaporites, calcite and dolomite, trona, barite, goethite. The saprolite samples are composed mainly of quartz, kaolinite, smectite-illite associations, and feldspars, traces of goethite, calcite, and evaporate minerals (sylvite, halite). The presence of calcite, dolomite, sylvite, and halite suggests the marine origin of the rocks, while trona mineral is a non-marine evaporate. The coexistence of these minerals in some of the analyzed samples suggests the deposition of sediments in a transitional environment of deposition. Traces of marine minerals are present in some of the samples but completely absent in others collected from another site. This suggests that the source rock formations from which the material originated are within the Upper Bima Sandstone interpreted as being deposited in a non-marine environment or the Yolde Formation, which is known as a transitional unit (transitional between the outcropping continental Upper Bima Sandstone and marine Pindiga Formation).
Źródło:
Geology, Geophysics and Environment; 2021, 47, 4; 203--216
2299-8004
2353-0790
Pojawia się w:
Geology, Geophysics and Environment
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A multi-analytical approach for the analysis of cation distribution in a aluminoceladonite structure
Autorzy:
Kądziołka-Gaweł, Mariola
Dulski, Mateusz
Czaja, Maria
Krzykawski, Tomasz
Szubka, Magdalena
Powiązania:
https://bibliotekanauki.pl/articles/2172615.pdf
Data publikacji:
2022
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
aluminoceladonite
ions position characterization isomorphic substitutions
Fe bearing phyllosilicates
X-ray photoelectron spectroscopy
Mössbauer spectroscopy
Raman spectroscopy
glinokrzemiany
krzemiany warstwowe
rentgenowska spektrometria fotoelektronów
XPS
spektroskopia mössabuerowska
spektroskopia Ramana
Opis:
In this paper cation arrangement in two samples of aluminoceladonite, emerald green and dark-green were studied by Mössbauer, Raman and X-ray photoelectron spectroscopies. The X-ray photoelectron spectroscopy (XPS) spectra obtained in the region of the Si2p, Al2p, Fe2p, K2p, and O1s core levels provided information, for the first time highlighting a route to identify the position of Si, Al, K, and Fe cations in a structure of layered silicates. The XPS analysis showed the presence of Al in tetrahedral and octahedral coordination while the K2p line indicated the possibility of K+ substitution by other cations in interlayer sites. Mössbauer spectroscopy provided information about crystal chemistry with respect to the local electronic and geometric environment around the Fe atom and to distortions of the polyhedra. It turned out that iron was located mostly in the cis-octahedra position wherein about 75% of iron appeared in the form of Fe3+. The most preferred cation combinations around Fe corresponded to 3Fe3+ ions and MgFe2+Fe3+/2MgFe3+. Raman spectroscopy illustrated aluminium substitution in silicon and iron positions wherein the concentration of the aluminium determined the degree of structural distortion within the layered system. These isomorphic substitutions implied a typical band arrangement in the hydroxyl region, which has not been observed in celadonites so far.
Źródło:
Acta Geologica Polonica; 2022, 72, 3; 353--368
0001-5709
Pojawia się w:
Acta Geologica Polonica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Sferule z granicy Kreda-Paleogen (Lechówka, Polska) – wstępne dane
Spherules from the Cretaceous–Paleogene boundary (Lechówka, Polska) – preliminary data
Autorzy:
Brachaniec, Tomasz
Szopa, Krzysztof
Karwowski, Łukasz
Krzykawski, Tomasz
Salamon, Mariusz
Brom, Krzysztof
Powiązania:
https://bibliotekanauki.pl/articles/1033022.pdf
Data publikacji:
2015
Wydawca:
Polskie Towarzystwo Meteorytowe
Tematy:
Cretaceous–Paleogene boundary
impact origin
smectite
spherule
spinel
Opis:
Samples of boundary clay from Cretaceous–Paleogene deposits from Lechówka, Poland were examined for spherules to confirm the impact origin of the sediment. The chemical composition of investigated spherules show similarities to material from the K–Pg boundary from Stevns Klint. The impact genesis of the spherules is confirmed by the presence of nickel-rich spinel grains on their surfaces. The deposits with spherules are built by smectite with Al and Mg enrichment. This cheto smectite is forming as a result of the weathering of the impact glass.
Źródło:
Acta Societatis Metheoriticae Polonorum; 2015, 6; 17-22
2080-5497
Pojawia się w:
Acta Societatis Metheoriticae Polonorum
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Neoproterozoic ophiolite exotic blocks in the Outer Western Carpathians, southern Poland : a record of the fast ocean-floor cooling and alterations
Autorzy:
Gawęda, Aleksandra
Szopa, Krzysztof
Waśkowska, Anna
Golonka, Jan
Krzykawski, Tomasz
Kalinichenko, Tatiana
Powiązania:
https://bibliotekanauki.pl/articles/27323309.pdf
Data publikacji:
2023
Wydawca:
Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
Tematy:
Outer Carpathians
Neoproterozoic
ophiolite mélange
ocean floor
Opis:
Ophiolitic blocks, represented by metagabbro and serpentinite containing relict pyroxene, olivine, baddeleyite, zirconolite, Ni-pyrite and pyrrhotite, were found as exotic blocks in an olistostrome in the Magura Nappe, Outer Western Carpathians. The geochemical and isotopic features of the blocks suggest they represent mantle-derived rocks, with within-plate geochemistry signatures, modified by subduction, with lithospheric mantle input. A U-Pb apatite cooling age (614 ±3 Ma) is within age uncertainty of a published U-Pb zircon magmatic crystallization age (~614 Ma) implying rapid post-crystallization cooling. Pervasive alteration with replacement of primary minerals by low-temperature assemblages is observed in all rock fragments and is interpreted as contemporaneous with shearing. The secondary mineral assemblages and temperature modelling allow the interpretation that the pervasive ocean-floor metamorphism is the alteration in these meta-mafic rocks. These ophiolitic fragments can be linked to the Neoproterozoic break up of Rodinia/Pannotia.
Źródło:
Geological Quarterly; 2023, 67, 1; art. no. 9
1641-7291
Pojawia się w:
Geological Quarterly
Dostawca treści:
Biblioteka Nauki
Artykuł

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