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12. Oktober holder Fenna Ammerlaan og Marek Zastapilo to spennende foredrag for oss om helt fersk forskning fra sine doktorgradsprosjekter.Dato: 12. Oktober, kl 19
Sted: Work-Work, Munkegata 58, Trondheim
Fenna Ammerlaan (NTNU): Harmonizing rift domain terminology in the Northeast Atlantic
Sammendrag: Rifted margins form when the continental lithosphere is stretched, thinned and ruptured through rifting, eventually leading to continental breakup and the onset of oceanic crust formation. It is commonly accepted that these rifted margins can be divided into distinct structural domains based on their tectono-magmatic architecture. However, there is currently no agreed way to define the boundaries between these different domains. This lack of consistency in terminology makes it difficult to compare different margins and to apply a common framework across studies.
In this talk, I’ll present ongoing work from my PhD, where I use the Northeast Atlantic as a natural laboratory to tackle this terminology problem. I’ll discuss how different datasets and methods used influence the location of the domain boundary and explore how we might move towards a clearer and more unified way of describing rifted margins.
Marek Zastapilo (NTNU): Reconstructing the Lapland–Kola Orogen: an archipelago-style ocean in the far north?
Sammendrag: Around 1.9 billion years ago, the ancient continents of Karelia and Kola collided, closing the ocean between them and raising a mountain belt across what is now Finnmark, Finnish Lapland and the Kola Peninsula. The mountains are long gone, but their deeply eroded roots remain – along with 150 years of competing interpretations and confusing terminology. In this talk, I'll use new zircon ages, isotope data and pressure–temperature estimates to trace where the orogen's pieces came from and how they were welded together. Was that ocean a simple basin between two continents, or an archipelago of volcanic arcs and microcontinents, like today's Southwest Pacific? Why did some of its rocks get hot enough to start melting at surprisingly shallow depths? And did plate tectonics 1.9 billion years ago play by the same rules as today?
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Event venue
Work-Work, Munkegata 58, Trondheim, Norway
Tickets
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