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Przegląd potencjalnych śladów życia pozaziemskiego w meteorytach

100%

Brachaniec T.

2013

tom 62

nr 1

Historia zapisana w muszlach

63%

Brom K. R. , Brachaniec T.

tom 115

nr 10-12

The first Polish tektites: preliminary SEM investigation

51%

Brachaniec T. , Szopa K. , Karwowski Ł.

Contemporary Trends in Geoscience

2013

tom Vol. 2, iss. 1

18--21

In Lower Silesia, the first Polish moldavites were discovered. To recognize the primary chemical composition and check the morphology of investigated material SE and BSE images were used. The samples show presence of vesicles, which are one of the most typical features of tektite glass. Referring to the preliminary EDS results and comparing them with literature data, it can be assumed that in all cases the base material for all known moldavites was the same.

Pyłek - co nam mówi?

51%

Skrzeczko S. , Brom K. R. , Wolny M. , Brachaniec T.

Wszechświat

2015

tom 116

nr 04-06

Spherules associated with the Cretaceous–Paleogene boundary in Poland

51%

Brachaniec T. , Karwowski Ł. , Szopa K.

tom Vol. 64, no. 1

99--108

The succession of the Lechówka section near Chełm in south-eastern Poland presents the first complete record of the Cretaceous–Paleogene (K–Pg) boundary in Poland. Samples of the boundary clay were examined for microtektites and shocked minerals to confirm the impact origin of the sediment. The spheroidal fraction reveals morphological and mineralogical features, e.g., spherules, similar to material from the K–Pg boundary as described from elsewhere. The impact genesis of the spherules is confirmed by the presence of nickel-rich spinel grains on their surfaces. The spinels are considered to be primary microlites and, thus, the spherules at Lechówka can be classified as microkrystites. No shocked minerals were noted. The deposits with spherules comprise Aland Mg-rich smectite (Cheto smectite). This almost pure Mg-rich smectite, forming up to 100% of the clay fraction, derived from the weathering of the impact glass. It is proposed that the spherules isolated from the Cretaceous-Paleogene boundary clay at Lechówka come from the Chicxulub crater in Mexico.

New moldavites from SW Poland

51%

Brachaniec T. , Szopa K. , Karwowski Ł.

tom Vol. 66, no. 1

99--105

Four newly discovered moldavites from the East and West Gozdnica pits, SW Poland, are characterized. All specimens, including other four, reported earlier, are from Upper Miocene fluvial sediments of the Gozdnica Formation. Their weight varies between 0.529 and 1.196 g. The moldavites are bottle green in colour and have bubbles and inclusions of lechatelierite. Low degree of corrosion suggests short river transport, apparently eastward from Lusatia.

Szum fal pradawnego wybrzeża: wąwóz Zbrosławice-Kamieniec

51%

Wieczorek A. , Trzesiok D. , Brachaniec T. , Trzesiok S.

Przyroda Górnego Śląska

2016

nr 85

Origin of parautochthonous Polish moldavites : a palaeogeographical and petrographical study

45%

Szopa K. , Badura J. , Brachaniec T. , Chew D. , Karwowski Ł.

tom Vol. 87, No. 1

1--12

In this article, the most recent moldavite discoveries in Poland and their host sediments are characterised and discussed. They were discovered at Lasów, located about 8 km north of Zgorzelec (Poland) and Görlitz (Germany), about 700 m from the Polish-German border, close to the Lusatian Neisse (Nysa) River. The tektites were collected from Vistulian (Wiechselian) glacial age sand and gravel of a closed quarry pit, associated with the river terraces. In the Lasów area, the moldavite-bearing sediments are Pleistocene in age and represent Lusatian Neisse terrace deposits. They were redeposited from the upper part of the drainage basin of the Lusatian Neisse, probably washed out from the Miocene sediments that filled the Zittau Depression, the Berzdorf–Radomierzyce Depression, the Višňová Depression and the tectonically uplifted Izera Mts. and Działoszyn Depression. The erosion of Miocene deposit occured on a large scale in the uplifted foothills of the Upper Miocene Izera, Lusatia and Kaczawa complexes. The sediment cover was removed from the Działoszyn Depression. The drainage basin of the Lusatian Neisse is the area where moldavites were formed by the Nördlinger Ries impact. The source area of moldavite is the same for the Miocene deposits around Gozdnica, as well as for the Pleistocene sediments at Lasów.