Wyniki wyszukiwania - BazTech

Ograniczanie wyników

2 2025

Powiadomienia systemowe

Sesja wygasła!

Znaleziono wyników: 2

Liczba wyników na stronie

Wyniki wyszukiwania

Sortuj według:

Ogranicz wyniki do:

80 lat nauk geologicznych na polskim Uniwersytecie Wrocławskim

Wojtulek Piotr, Pietranik Anna, Marszałek Henryk, Matusiak-Małek Magdalena

Przegląd Geologiczny

2025

Vol. 73, nr 9

766--775

In 2025, we celebrate the 80th anniversary of the establishment of geological sciences at the University of Wroclaw in Poland. The Polish pioneers of geology at the University were Prof. Henryk Teisseyre and Prof. Józef Zwierzycki, who organized the first structures and academic activities as early as the academic year 1945/1946. The currently existing Institute of Geological Sciences, formally established in 1967, is the successor to the previously existing departments of Physical Geology, Stratigraphic Geology, and Mineralogy and Petrology. Geology at the University of Wroclaw after 1945 has been developing continuously for 80 years under various conditions, both during the communist period and after the political transformation in 1989. During this time, academic teachers working at the Institute presented groundbreaking scientific works on the geology and hydrogeology of the Sudetes, Lower Silesia and Opole regions, and educated numerous generations of geologists, who now constitute the strength of the staff of the Polish Geological Survey, state administration, and geological and mining enterprises. The article summarizes the past 80 years and discusses the most important events that took place during this period at the Institute of Geological Sciences of the University of Wroclaw.

Syn-volcanic melt-rock reactions recorded in peridotitic xenoliths from Scania, S Sweden

Kukuła Anna, Matusiak-Małek Magdalena, Mikrut Jakub, Ntaflos Theodoros, Johansson Leif

Mineralogia

2025

Vol. 56, iss. 1

4--12

Peridotite xenoliths from Scania (S Sweden), brought to the surface by Mesozoic basanitic magmas, provide insights into the lithospheric mantle underlying the East European Craton. During their ascent, some of the entrained xenoliths were infiltrated by a Si-undersaturated melt. The infiltration triggered orthopyroxene dissolution and the formation of finegrained olivine, clinopyroxene and Si-rich glasses (trachytic/trachydacitic and dacitic). The latter interacted with clinopyroxene and/or spinel creating spongy rims of various thicknesses (from few to hundreds of μm). The reactions varied in intensity and effect depending on the distance from the xenolith margin and the duration of the reaction time. At the outer parts of xenoliths, intense reactions dissolved orthopyroxene entirely, forming spongy rims on spinel and clinopyroxene, while inner sections showed limited reactions, primarily between mafic melts and orthopyroxene. The local reheating and melting of fine-grained aggregates during the ascent of xenoliths resulted in the formation of a hydrous, high-Mg, glass-like phase.