Katarzyna Walczak

Katarzyna Walczak
AGH University of Science and Technology in Kraków | AGH

PhD

About

23
Publications
4,308
Reads
How we measure 'reads'
A 'read' is counted each time someone views a publication summary (such as the title, abstract, and list of authors), clicks on a figure, or views or downloads the full-text. Learn more
207
Citations
Citations since 2016
15 Research Items
203 Citations
2016201720182019202020212022010203040
2016201720182019202020212022010203040
2016201720182019202020212022010203040
2016201720182019202020212022010203040

Publications

Publications (23)
Article
Full-text available
The Seve Nappe Complex (SNC) comprises continental rocks of Baltica that were subducted and exhumed during the Caledonian orogeny prior to collision with Laurentia. The tectonic history of the central SNC is investigated by applying in-situ zircon and monazite (Th-)U–Pb geochronology and trace element analysis to (ultra-)high pressure (UHP) paragne...
Article
Full-text available
The Scandinavian Caledonides comprise nappe stacks of far-travelled allochthons that record the opening and closure of the Iapetus Ocean, culminating with the collision of Baltica and Laurentia. The Seve Nappe Complex (SNC) of the Scandinavian Caledonides comprises relics of the outermost Baltoscandian passive margin that were subducted to mantle d...
Article
Full-text available
The Scandinavian Caledonides comprise nappe stacks of far-travelled allochthons that record closure of the Iapetus Ocean and subsequent continental collision of Baltica and Laurentia. The Seve Nappe Complex (SNC) of the Scandinavian Caledonides includes relics of the outermost Baltoscandian passive margin that were subducted to mantle depths. The e...
Article
Full-text available
The Seve Nappe Complex exposed in the Kittelfjäll area of the northern Scandinavian Caledonides comprises a volcano-sedimentary succession representing the Baltica passive margin, which was metamorphosed during the Iapetus Ocean closure. Garnet amphibolites, together with their host migmatitic paragneisses, record a potential (U)HP event followed b...
Article
Full-text available
The Vestgӧtabreen Complex exposed in the Southwestern Caledonian Basement Province of Svalbard comprises two Caledonian high-pressure units. In situ white mica 40Ar/39Ar and monazite Th-U-total Pb geochronology has resolved the timing of the tectonic evolution of the complex. Cooling of the Upper Unit during exhumation occurred at 476 ± 2 Ma, short...
Article
Full-text available
The northern extent of the Scandinavian Caledonides includes the Skibotn Nappe Complex of still debated structural position. This paper is focused on part of this complex and presents new U-Th-total Pb monazite dating results for the migmatitic gneiss of the Kåfjord Nappe. The rocks show mineral assemblage of garnet + plagioclase + biotite + white...
Article
The first find of microdiamond in the Nordøyane ultra-high-pressure (UHP) domain of the Western Gneiss Region (WGR) of the Scandinavian Caledonides reshaped tectonic models for the region. Nevertheless, in spite of much progress regarding the meaning and significance of this find, the history of rock that the diamonds were found in is complex and s...
Article
Full-text available
In-situ monazite Th–U–total Pb dating and zircon LA–ICP–MS depth-profiling was applied to metasedimentary rocks from the Vaimok Lens in the Seve Nappe Complex (SNC), Scandinavian Caledonides. Results of monazite Th–U–total Pb dating, coupled with major and trace element mapping of monazite, revealed 603 ± 16 Ma Neoproterozoic cores surrounded by ri...
Poster
Full-text available
Abstract Studies of melt inclusions in metamorphic minerals have recently became an important trend in petrology of high grade metamorphic rocks like migmatites and granulites (Cesare, et al. 2011; Ferrero et al., 2012). Such inclusions are considered to be small droplets of anatectic melt trapped within metamorphic minerals like garnets. Most incl...
Article
Full-text available
The Seve Nappe Complex of the Scandinavian Caledonides is thought to be derived from the distal passive margin of Baltica which collided with Laurentia in the Scandian Phase of the Caledonian Orogeny at 430–400 Ma. Parts of the Seve Nappe Complex were affected by pre-Scandian high- and ultrahigh-pressure metamorphism, in a tectonic framework that i...
Article
Garnet and zircon geochronology combined with trace element partitioning and petrological studies provide tight constraints on evolution of the UHT-(U)HP terrain of the Orlica-Śnieżnik Dome (OSD) in the NE Bohemian massif. Lu-Hf dating of peritectic garnet from two mesocratic granulites constrained the time of its initial growth at 346.9 ± 1.2 and...
Conference Paper
Full-text available
High pressure granulites are a common rock type in the Variscan terrains throughout Europe. The Orlica-Śnieżnik leucogranulites contain Grs-rich Grt, Ky and ternary feldspar in a leucocratic matrix with Qz+Kfs+Pl. The garnet grew as result of partial melting and contains droplets of crystallized anatectic melt (nanogranites). Such inclusions " port...
Article
Full-text available
Remnants of hydrous melt formed at mantle depths have been identified and characterized within high-pressure leucogranulites of the Orlica-Śnieżnik Dome (Bohemian Massif, central Europe). They occur as nanogranites in garnet formed via partial melting of granitoids during the Variscan orogeny. Melt composition and H2O content have been investigated...

Network

Cited By

Projects

Projects (2)
Project
Many studies of continental growth and modification have focused on the major phase of growth in the early history of the Earth, but a major goal of our proposed study is to investigate an important, but hitherto little-recognised example of more recent (Phanerozoic) continental growth by accretion in a subduction-collision system – the Caledonian orogen of Scandinavia. Here, crust generated in arcs, back-arcs, fore-arcs and mid-ocean ridges within the Iapetus Ocean has been accreted to the Baltic craton by a combination of arc collisions and final continental collision with Laurentia. The accreted rocks are now preserved in the Köli Nappe Complex (KNC) in Sweden and Norway.
Project
It is widely accepted that the Iapetus Ocean opened in the latest Neoproterozoic, but the exact timing of this event is still debated. Nearly all evidence for such timing and reasoning about it are based on geochronological data obtained from mafic igneous rocks and their contact aureoles. However, the question arises whether the timing of this voluminous igneous activity is indeed representative for true opening of the Iapetus. If so, do we have a stratigraphic record of this event? Even more importantly, what was the role and where was located the centre of the mantle plume that was supposed to contribute to the Iapetus opening process ? To answer these questions, we propose to focus on the Neoproterozoic to Cambrian evolution of Baltica and possible peri-Baltican terranes.