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1

Klast stopu impaktowego w brekcji pułtuskiej

100%

Krzesińska A. M.

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vol. 9

74-91

EN

The Pułtusk H chondritic breccia records a complex impact history and contains various products of impact metamorphism. Here, impact melt lithology is described, which is embedded into the Pułtusk breccia. The impact melt clast is formed by microcrystalline quenched silicates and metal-troilite globules and chondritic relicts are retained in the melt. The relicts record strong shock deformation, S4–S5 and they have well developed foliated fabric of metal grains. The melt formed by severe collision and impact melting on the parent body. The chondritic material was superheated and molten. Silicate melt unmixed from the metal-sulphide melt and both were rapidly quenched. Most likely the event occurred during Late Heavy Bombardment, ~3.6 Ga.

2

Meteoryty w kolekcji Obserwatorium Astronomicznego Uniwersytetu Warszawskiego (OAUW)

63%

Kozłowski S.

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PL

Budynek Obserwatorium Astronomicznego przy Al. Ujazdowskich 4 w centrum Warszawy powstawał w latach 1820–1824. W swojej dwustuletniej historii był on niemym świadkiem dwóch dzisiaj już historycznych zdarzeń – zarówno przelotu bolidu (meteorytu) Pułtusk w 1868 roku oraz towarzyszącym mu hałasom eksplozji, jak również efektów świetlnych związanych ze spadkiem meteorytu Łowicz w 1935 roku. W obydwu tych przypadkach pracownicy Obserwatorium wydelegowani zostali na miejsca spadku meteorytów, gdzie zebrali oni świeże okazy meteorytu Pułtusk (około 400 sztuk) oraz Łowicz (cztery lub pięć sztuk). Obecnie kolekcję Obserwatorium stanowi sześć meteorytów: 3,7 kg okaz meteorytu Łowicz (trzeci największy istniejący okaz z tego spadku), doskonale zachowany meteoryt Pułtusk o wadze 1,2 kg, a także Allende, Canyon Diablo, Gibeon i Millbillillie.

EN

The building of the Astronomical Observatory at Al. Ujazdowskie 4 in the center of Warsaw was constructed between 1820 and 1824. During its bicentennial history, it has been a silent witness to two now-historical events – both the firball of the Pułtusk meteorite in 1868, accompanied by the sounds of the explosion, as well as the light effects associated with the fall of the Łowicz meteorite in 1935. In both cases, employees of the Observatory were delegated to the meteorite strewnfields, where they collected fresh specimens of the Pułtusk meteorite (around 400 specimens) and Łowicz (four or five fragments). Currently, the Observatory’s collection consists of six meteorites: a 3.7 kg specimen of the Łowicz meteorite (the third-largest existing specimen from this fall), a well-preserved 1.2 kg Pułtusk meteorite, as well as Allende, Canyon Diablo, Gibeon, and Millbillillie.

3

Odróżnianie próbek prawdziwych meteorytów od kamiennych próbek meteorytopodobnych – ważna rola spektroskopii mössbauerowskiej

63%

Bogusz P., Gałązka-Friedman J., Brzózka K., Jakubowska M., Woźniak M., Karwowski Ł., Duda P.

Acta Societatis Metheoriticae Polonorum

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2022

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vol. 13

27-36

EN

Four stony pieces were delivered to our laboratory for checking if they are fragments of meteorites: first sample (sample No. 1) was a fragment of a rock that fell near Leoncin in Poland, second sample (sample No. 2) was a fragment of a rock found also in Poland in the vicinity of Pultusk, third sample (sample No. 3) was a meteorite specimen bought on the meteorite exchange and fourth sample (sample No. 4) was a stone object whose decline was observed in Europe. We obtained mössbauer spectra of the delivered samples. The mössbauer spectrum of sample No. 1 is very similar to the spectrum of ordinary chondrite of type LL. Comparison of the mössbauer spectrum of sample No. 2 with mössbauer spectrum of Pułtusk meteorite showed very large differences. In the spectrum of sample No. 3, a clear signal from iron-nickel alloy and troilite can be observed. These observations indicate that it is an object of extraterrestrial origin. Mössbauer spectrum of Sample No. 4 is similar to the spectrum of terrestrial magmatic rocks. Based on these spectrum we cannot clearly determine where the examined object comes from. This work demonstrates the usefulness of Mössbauer spectroscopy in recognizing samples that are fragments of meteorites.

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3 Acta Societatis Metheoriticae Polonorum

1 2024

1 2022

1 2018

1 Bogusz P.

1 Brzózka K.

1 Duda P.

1 Gałązka-Friedman J.

1 Jakubowska M.

1 Karwowski Ł.

1 Kozłowski S.

1 Krzesińska A. M.

1 Woźniak M.

Klast stopu impaktowego w brekcji pułtuskiej

Meteoryty w kolekcji Obserwatorium Astronomicznego Uniwersytetu Warszawskiego (OAUW)

Odróżnianie próbek prawdziwych meteorytów od kamiennych próbek meteorytopodobnych – ważna rola spektroskopii mössbauerowskiej