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Tytuł:
Aktualny stan badań nad meteorytem Morasko
Autorzy:
Muszyński, Andrzej
Karwowski, Łukasz
Kryza, Ryszard
Pilski, Andrzej S.
Powiązania:
https://bibliotekanauki.pl/articles/1032812.pdf
Data publikacji:
2011
Wydawca:
Polskie Towarzystwo Meteorytowe
Tematy:
Morasko meteorite
meteorites
Źródło:
Acta Societatis Metheoriticae Polonorum; 2011, 2; 191
2080-5497
Pojawia się w:
Acta Societatis Metheoriticae Polonorum
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Badania chemiczne deszczu meteorytów żelaznych Jankowo Dolne-Morasko-Przełazy
Autorzy:
Pilski, Andrzej S.
Karwowski, Łukasz
Kryza, Ryszard
Muszyński, Andrzej
Powiązania:
https://bibliotekanauki.pl/articles/1032950.pdf
Data publikacji:
2012
Wydawca:
Polskie Towarzystwo Meteorytowe
Tematy:
Jankowo Dolne meteorite
Morasko meteorite
Przełazy meteorite
iron meteorites
Źródło:
Acta Societatis Metheoriticae Polonorum; 2012, 3; 157-158
2080-5497
Pojawia się w:
Acta Societatis Metheoriticae Polonorum
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Badania metalograficzne i mikroanalityczne meteorytu Morasko
Metallography and Microanalysis Study of the Morasko Meteorite
Autorzy:
Popławski, Mikołaj
Jóźwiak, Karol
Kachlicki, Tomasz
Powiązania:
https://bibliotekanauki.pl/articles/1032785.pdf
Data publikacji:
2011
Wydawca:
Polskie Towarzystwo Meteorytowe
Tematy:
EDS
OM
SEM
TEM
meteorites
microstructure Morasko meteorite
Opis:
The following work is an attempt to characterize the microstructure of Morasko meteorite with the application of optical microscopy as well as transmission and scanning electron microscopy. Chemical composition was examined with EDS and OES methods. The occurrence of mechanical twins has been detected which is scarce in case of earthly a iron. The groundmass of the examined alloy constitutes a ferronickel (approx. 7% Ni) of A2 lattice. On the surface of metallographic microsection there can be seen Neumann bands and abundance of ferrophosphorus (Fe, Ni)3P.
Źródło:
Acta Societatis Metheoriticae Polonorum; 2011, 2; 117-124
2080-5497
Pojawia się w:
Acta Societatis Metheoriticae Polonorum
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Batymetria jezior meteorytowych w rezerwacie „Meteoryt Morasko”
Bathymetry of crater lakes in the “Meteoryt Morasko” reserve
Autorzy:
Choiński, Adam
Ptak, Mariusz
Powiązania:
https://bibliotekanauki.pl/articles/1033077.pdf
Data publikacji:
2017
Wydawca:
Polskie Towarzystwo Meteorytowe
Tematy:
Morasko
crater
impact
lakes
meteorite
Opis:
The paper presents results of bathymetric measurements performed on three crater lakes located in the “Meteoryt Morasko” reserve in west Poland. The maximum depth of the largest of the analysed lakes (1695 m2) was determined to amount to 2.6 m. The parameters of the lake (surface area, depth, etc.) are largely determined by a ditch dug through the crater in the north-western part of the lake, affecting the maximum water volume accumulated in the lake.
Źródło:
Acta Societatis Metheoriticae Polonorum; 2017, 8; 23-29
2080-5497
Pojawia się w:
Acta Societatis Metheoriticae Polonorum
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Charakterystyka ałtaitu z meteorytu Morasko metodą spektroskopii Ramana
Autorzy:
Runka, Tomasz
Karwowski, Łukasz
Muszyński, Andrzej
Powiązania:
https://bibliotekanauki.pl/articles/1032954.pdf
Data publikacji:
2012
Wydawca:
Polskie Towarzystwo Meteorytowe
Tematy:
Morasko meteorite
Raman spectroscopy
altaite
Źródło:
Acta Societatis Metheoriticae Polonorum; 2012, 3; 159-160
2080-5497
Pojawia się w:
Acta Societatis Metheoriticae Polonorum
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Co mówią wyniki badań mikrometeorytów z rezerwatu „Meteoryt Morasko”
Autorzy:
Dworzyńska, Magdalena
Muszyński, Andrzej
Powiązania:
https://bibliotekanauki.pl/articles/1032947.pdf
Data publikacji:
2012
Wydawca:
Polskie Towarzystwo Meteorytowe
Tematy:
Morasko meteorite
meteorites
micrometeorites
Źródło:
Acta Societatis Metheoriticae Polonorum; 2012, 3; 155-156
2080-5497
Pojawia się w:
Acta Societatis Metheoriticae Polonorum
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Dokumentacja znalezisk meteorytu Morasko w latach 2011–2014 : problemy metodyczne i uzyskane efekty
Documenting the Morasko meteorite finds in 2011-2014 : methodical problems and results obtained
Autorzy:
Nowak, Monika
Muszyński, Andrzej
Powiązania:
https://bibliotekanauki.pl/articles/2076020.pdf
Data publikacji:
2020
Wydawca:
Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
Tematy:
meteoryt Morasko
znaleziska meteorytów
dokumentacja meteorytów
pole zasypane
Morasko meteorite
meteorite findings
meteorite documentation
strewn field
Opis:
The Morasko meteorite is currently one of the biggest tourist attractions of the city of Poznań. In this paper we present the stages of creating documentation for finds of individual fragments of the Morasko meteorite, conducted at the Institute of Geology, Adam Mickiewicz University, in 2011-2014. During the initial period of documentary work, the focus was mainly on the compilation of topographic maps prepared by various authors to create one collective map of finds. ESRI (ArcGIS) software was used to prepare the documentation. The main problem at the initial stage of documentation was the coordination of source data prepared on topographic bases developed in various reference systems (PUWG 65, PUWG 92, tourist map without any system). During the years 2012-2014, topographic data were successively supplemented with new finds, resulting in a database comprising a total of 1413 items - containing coordinates, data on individual finders, masses (given as a range or as specific data in grams), depths at which meteorites rested, and, in some cases, special features (so-called shrapnel). The obtained documentation is a unique source of data on most of the fragments of the Morasko meteorite. It remains debatable whether the collected information is sufficient to calculate a reliable meteorite strewn field.
Źródło:
Przegląd Geologiczny; 2020, 68, 12; 879--885
0033-2151
Pojawia się w:
Przegląd Geologiczny
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Evolution of the Dislocation Structure of Iron Meteorite
Autorzy:
Osuch, W.
Błoniarz, R.
Michta, G.
Suliga, I.
Powiązania:
https://bibliotekanauki.pl/articles/353300.pdf
Data publikacji:
2020
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
iron meteorite
Morasko
TEM study
dislocation structure
Neumann’s bands
Opis:
The state of the dislocation substructure of meteorite in which the history of phenomena accompanying the meteorite during its passage through the Earth’s atmosphere is recorded remains unused. The main goal of the presented work is a comprehensive analysis of the dislocation structure of the iron meteorite from the Morasko reserve (Poland, Wielkopolska Voivodeship) by TEM methods to determine the conditions and mechanism of its formation. The work is cognitive in the field of phenomena related to the destruction and deformation of the material in extreme conditions: space and terrestrial space. It can also be useful in the research on the creation of the material with specific mechanical properties, as well as a unique reference material for earth experiments with low-temperature deformation, high-speed deformation, recrystallization processes with short thermal pulses and structure relaxation in conditions of very long time periods.
Źródło:
Archives of Metallurgy and Materials; 2020, 65, 1; 485-492
1733-3490
Pojawia się w:
Archives of Metallurgy and Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Friedland 1304 – zajrzyjmy do źródeł
Friedland 1304 – let’s look to the sources
Autorzy:
Woźniak, Marek
Powiązania:
https://bibliotekanauki.pl/articles/1033015.pdf
Data publikacji:
2014
Wydawca:
Polskie Towarzystwo Meteorytowe
Tematy:
Freidland
Morasko meteorite
Vredeberch
comets
historic bolides
meteorites
meteoritica
wiki.meteoritica.pl
Opis:
I wonder if a description of Morasko meteorite “rainfall” could be found in any medieval chronicles? If Bartoshewitz’s and ‘bolid wielkopolski’ hypothesis’s are only the result of dishonesty of chroniclers and ancient meteorite researchers? A survey of old annals is closing us to the explanation of this catastrophic event from the turn of XIII and XIV century. However, new thesis requires further research.
Źródło:
Acta Societatis Metheoriticae Polonorum; 2014, 5; 155-181
2080-5497
Pojawia się w:
Acta Societatis Metheoriticae Polonorum
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Jeszcze jedna dyskusja na temat daty spadku meteorytu Morasko
Another discussion about date of Morasko meteorite fall
Autorzy:
Walesiak, Tomasz
Powiązania:
https://bibliotekanauki.pl/articles/1033089.pdf
Data publikacji:
2017
Wydawca:
Polskie Towarzystwo Meteorytowe
Tematy:
Morasko meteorite
bright meteor
cosmic catastrophy
dating
history of Wielkopolska
observed fall
Opis:
It’s over 100 years after discovery of the first iron meteorite in the area of Morasko, but still we are not sure about date of the fall. Recent researches suggest that it happened about 5000 years ago, however there are some other facts proving, that event took place in the last millenium. Verification o 14C radio carbon dating results revealed, that it can give us only the maximum date (meaning: not older than). The main problem was that probes were taken from mixed types of sediments – some created before and some after the impact. Few years earlier there was another 14C examination of sediments lying beyond the floor of 2 small cavities and their age was estimated to be approximatelly 700 years BP. Similar results were received after verification of organic matter under charcoal in the weathering crust of the meteorite, which was found in the Morasko Restricted Area. Another proof was discovery of shrapnel in the root of old tree, which could not be older than 800–1000 years. At least 2 times it was discussed, if finding of Morasko iron meteorites couldn’t be matched with described observation A.D. 1301, mentioned in annales, hovever nobody was able to prove it. Analysis of historical documents lead to information of appearance of 3 suns, after sunrise, what happened in 14 Feb. 1271. Further investigation of other sources gave us even more facts. We can read in annales that in the same year, castles and cities were burned and destructed to the ground. There is also information that Poznan, the largest city in the area (approx 7.5 km South from the Morasko), was burned in (or shortly before) the year of 1274. What is more Annales from Poznan and from its parent town Wielkopolska were finished in A.D. 1271, just in the middle of the sentence. Finally, confirmation is given by archeological researches, which tell us that city walls and castle of Poznan were ruined shortly after they were constructed, but scientists found difficulty to answer, when exactly it could happen. The main problem was unknown weapon, able to leave such a large destruction, even when considered next centuries. As we can find in annales that Poznan in A.D. 1253 had castle and fortifications so only iron meteorite impact in 1271, producing craters in the area of Morasko and Umultowo, can explain the scale of the devastation discovered by archeologists.
Źródło:
Acta Societatis Metheoriticae Polonorum; 2017, 8; 123-148
2080-5497
Pojawia się w:
Acta Societatis Metheoriticae Polonorum
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Kratery Morasko – obrona hipotezy ukośnego impaktu w kontekście dostępnej wiedzy i wyników badań
Morasko craters – in defense of oblique impact origin based on knowledge and research
Autorzy:
Walesiak, Tomasz
Powiązania:
https://bibliotekanauki.pl/articles/1830330.pdf
Data publikacji:
2021
Wydawca:
Polskie Towarzystwo Meteorytowe
Tematy:
bilateral symmetry
crater field
elliptical craters
forbidden zone
meteorite Morasko
oblique impact
Opis:
Over 2 years ago there was published an article (Bronikowska 2018a) challenging some results of research related to Morasko meteorite fall. Those results are huge problem for scientists who are not able to explain them using simplified models and maybe do not want to admit that some assumptions should be verified and redefined. One of hypothesis discussed in the paper was article manifesting that Morasko craters were created during oblique impact (Walesiak 2017) and that initial trajectory can be estimated by elongation of almost all cavities, their bilateral symmetries according to longer axis and observed asymmetries of rims. By comparison to Campo del Cielo craters Walesiak suggested that impact angle could be very shallow (10–20°), as ellipticity of all smaller Morasko structures is approx. 1,3. Further analysis of topography in neighborhood of Morasko revealed that there may exist more impact craters around this area, which may explain discovery of two iron meteorites near Oborniki village (17 km NW from Meteorite Morasko Restricted Area), unfortunately lost during World War II. In fact, Bronikowska confused definitions “oblique impact” and “elliptical craters”, what can be supported by given references (Elbeshausen et al. 2009) confirming Walesiak hypothesis. Unfortunately, this misunderstanding touches also another article of this author (Bronikowska et al. 2017), where obliquity was neglected. However, estimated during that modeling pre-impact angle (30–43°), according to known definitions written in many publications, should be classified as oblique impact. All elongated craters, as well as morphology of the largest structure in Meteorite Morasko Restricted Area suggest impact from NW while during reconstruction of meteoroid parameters Bronikowska assumed impactor coming from NE (based on existing strewn field). Considering not clear relation between meteorites and craters (e.g., lack of findings in cavities, relatively poor number of shrapnel fragments around structures and possibility that craters may be much older than fall of meteorites), it may be not enough reliable justification. Even if relation exists, example of Whitecourt (with distribution of meteorites downrange), compared with abundance of Morasko shrapnel fragments collected hundreds of meters NE from Restricted Area, undermines parameter used in modelling. Also, single fragmentation is doubtful, concluded after unreasonable omitting known craters outside Restricted Area (e.g., crater no 8 described by Pokrzywnicki (1964) and structure no 9 mentioned by Hodge (1994)). Finally, use of iSALE-2D shock physics code (valid for vertical impacts only) for modelling of elliptical craters formed during highly oblique impact (angle lower than 12°), even considering vertical component (which approximation is only applicable for impact into materials with a friction coefficient of about f=0,7 with no or very little cohesion) (Elbeshausen et al. 2009), also should not be considered as proper applied method leading to get valuable results. In this article there is proposed new strewn field definition for Morasko meteorite, based on elongation of all known and unconfirmed (yet) craters. Surprisingly, estimated (redefined) pre-impact trajectory gives convincing explanation for bilaterally symmetrical distribution of documented findings.
Źródło:
Acta Societatis Metheoriticae Polonorum; 2021, 12; 108-128
2080-5497
Pojawia się w:
Acta Societatis Metheoriticae Polonorum
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Kratery Morasko w świetle wiedzy na temat ukośnych impaktów
Morasko craters base on knowledge related to oblique impacts
Autorzy:
Walesiak, Tomasz
Powiązania:
https://bibliotekanauki.pl/articles/1033091.pdf
Data publikacji:
2017
Wydawca:
Polskie Towarzystwo Meteorytowe
Tematy:
Morasko meteorite
asymmetry
craters
ejecta
oblique impact
penetration funnels
strewnfield
Opis:
It is considered that The Morasko meteorite shower happened about 5400 years BP with a trajectory from NE to SW (Bronikowska et al. 2015). Recent studies not only prove that this fall could be observed in Februrary 14, 1271, but also that location of most findings in the area to the east side of the craters, should not be taken as the main indicator of impact direction. The proper answer can be given base on knowledge related to oblique impacts, supported by understanding of complicated fragmentation process. The largest crater in Morasko Meteorite Restricted Area has main ejecta plume located in SE, side walls in SW and NE, and free of ejecta Zone of Avoidance (ZoA) in NW. This clearly shows that impact trajectory was approximatelly from NW to SE. There were also discovered other structures, 2 km North from Restricted Area, having common features. Their ejecta plumes as well as few raised ducts (possible traces of underground penetration) are directed to SE, pointing the largest structure – Umultowskie Lake, located approx. 2 km ESE from known main Morasko crater. Shapes of cavities, their walls and ejecta asymmetry allow estimating trajectories and defining new Morasko strewnfield, which matches not only location of impact strucures and discovered meteorite fragments, but also explains smaller (3–4 kg) findings in the neighborhood of Oborniki Wielkopolskie.
Źródło:
Acta Societatis Metheoriticae Polonorum; 2017, 8; 149-168
2080-5497
Pojawia się w:
Acta Societatis Metheoriticae Polonorum
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Meteoryty żelazne – klasyfikacja w obrazach
Iron meteorites – classification in pictures
Autorzy:
Woźniak, Marek
Powiązania:
https://bibliotekanauki.pl/articles/1830332.pdf
Data publikacji:
2021
Wydawca:
Polskie Towarzystwo Meteorytowe
Tematy:
Morasko
Schwetz
Seeläsgen
Tartak
ataxites
classification
cooling rate
hexahedrites
iron meteorites
meteorite mineralogy
octahedrites
parent body
trace elements
Opis:
Meteoryty żelazne to grupa meteorytów, których głównym składnikiem jest żelazo (Fe) i nikiel (Ni), występujące w dwóch formach stopu Fe-Ni – kamacytu i taenitu. Ponieważ ich skład czyni je bardziej odpornymi na rozbicie (kruszenie) i trudniej ulegają procesowi ablacji przy przelocie przez atmosferę, więc statystycznie spadają one w postaci większych brył niż meteoryty kamienne lub żelazno-kamienne. Ich metaliczna budowa i wyjątkowo duża waga czynią z nich meteoryty łatwe do odróżnienia od zwykłych skał. Masa wszystkich znanych meteorytów żelaznych wynosi ponad 500 ton, co stanowi ~89% masy znanych meteorytów, ale spadki meteorytów żelaznych stanowią już tylko 4,56% wszystkich obserwowanych spadków (Wiki.Meteoritica.pl). Dziesięć największych okazów meteorytów na świecie to meteoryty żelazne! Dawniej na określenie meteorytów żelaznych używano określenia syderyt (siderite). Podziału meteorytów żelaznych dokonuje się według dwóch kryteriów. Starsza metoda bazuje na średniej zawartości niklu i na strukturze krystalicznej ujawniającej się na przeciętych i wytrawionych powierzchniach tzw. figury Thomsona-Widmanstättena. Przy takim podziale wyróżniamy trzy grupy: heksaedryty (hexahedrites) (śr. 4–6wt.% Ni), najpopularniejsze oktaedryty (octahedrites) (śr. 6–12wt.% Ni) oraz ataksyty (ataxites) (>12wt.% Ni). Druga, nowsza metoda klasyfikacji meteorytów żelaznych, opiera się na ich składzie chemicznym, w szczególności na zawartości pierwiastków śladowych (trace elements), takich jak german (Ge), gal (Ga), platyna (Pt), arsen (As), złoto (Au) i iryd (Ir). Drugim parametrem definiującym grupy meteorytów żelaznych jest ich skład mineralny. Minerałami „wskaźnikowymi” są występujące w formie różnych związków oraz w różnej formie i wielkości: siarczki, fosforki, węgliki, azotki i inkluzje krzemianowe. Zawartość pierwiastków śladowych versus zawartość niklu ujawnia chemiczne klastry (skupienia, clusters) reprezentujące różne chemiczne grupy meteorytów żelaznych. Część meteorytów żelaznych pochodzi z częściowo zdyferencjonowanych planetozymali rozerwanych na początku formowania żelaznego jądra i bogatej w krzemiany skorupy (to grupy IAB i IIE). Pozostałe meteoryty z innych grup pochodzą z jąder małych całkowicie zdyferencjonowanych planetozymali, rozbitych w zderzeniach, krótko po uformowaniu się.
Iron meteorites are meteorites whose main constituent is iron (Fe) and nickel (Ni), which occur in two forms of Fe-Ni minerals – kamacite and taenite. Since their composition makes them more resistant to shattering (crushing), and they are more challenging to ablate when passing through the atmosphere, they statistically fall in the form of larger lumps than stone or iron-stone meteorites. Their metallic structure and highly high weight make them easy to distinguish from ordinary rocks. The mass of all known iron meteorites is over 500 tons, which is ~89% of known meteorites, but falls of iron meteorites account for only 4.56% of all observed falls (wiki.meteoritica.pl). The ten largest meteorites in the world are iron meteorites! In the past, the term siderite was used to describe iron meteorites. The classification of iron meteorites is based on two criteria. The older method is based on the average nickel content and the crystal structure revealed on cut and etched surfaces, the so-called the Thomson-Widmanstätten patterns. In this division, we distinguish three groups: hexahedrites (4–6 wt.% Ni), the most popular octahedrites (6–12 wt.% Ni) and ataxites (>12 wt.% Ni). The second, more recent method of classifying iron meteorites is based on their chemical composition, in particular the content of trace elements such as germanium (Ge), gallium (Ga), platinum (Pt), arsenic (As), gold ( Au) and iridium (Ir). Another parameter that defines the groups of iron meteorites is their mineral composition. “Indicator” minerals are in the form of various compounds and multiple shapes and sizes: sulfides, phosphides, carbides, nitrides, and silicate inclusions. Trace element content versus nickel content reveals chemical clusters representing the different chemical groups of iron meteorites. Some of the iron meteorites come from the partially differentiated asteroid ruptured at the beginning of forming the iron core and the silicate-rich shell (these are groups IAB and IIE). The remaining meteorites from other groups come from the nuclei of minor differentiated asteroids, shattered in collisions shortly after formation.
Źródło:
Acta Societatis Metheoriticae Polonorum; 2021, 12; 149-216
2080-5497
Pojawia się w:
Acta Societatis Metheoriticae Polonorum
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Mineralogia wybranych próbek z otoczenia meteorytów w rezerwacie „Meteoryt Morasko”
Mineralogy of samples from the vicinity of finds of meteorite Morasko
Autorzy:
Bartosz, Zofia
Muszyński, Andrzej
Powiązania:
https://bibliotekanauki.pl/articles/1032990.pdf
Data publikacji:
2013
Wydawca:
Polskie Towarzystwo Meteorytowe
Tematy:
Morasko meteorite
frakcja magnetyczna
meteorites
meteoryt Morasko
mikrometeoryty
Źródło:
Acta Societatis Metheoriticae Polonorum; 2013, 4; 131
2080-5497
Pojawia się w:
Acta Societatis Metheoriticae Polonorum
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Mineralogiczne badania osadów wokół meteorytów na terenie rezerwatu „Meteoryt Morasko”
Autorzy:
Dziurdzi, Agnieszka
Powiązania:
https://bibliotekanauki.pl/articles/1032869.pdf
Data publikacji:
2011
Wydawca:
Polskie Towarzystwo Meteorytowe
Tematy:
Morasko meteorite
Źródło:
Acta Societatis Metheoriticae Polonorum; 2011, 2; 179
2080-5497
Pojawia się w:
Acta Societatis Metheoriticae Polonorum
Dostawca treści:
Biblioteka Nauki
Artykuł
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