Programme of the summer semester 2021

22 April 2021

Dr. Richard Ott
(GFZ Potsdam)

Tectonics and surface processes of the Hellenic Subduction Zone across multiple time-scales

Invited by: Dirk Scherler

The Hellenic Subduction Zone in Greece is the largest and seismically most active subduction zone in Europe. I will be talking about how deformation in this region has changed over a range of time-scales from Miocene to today, and we’ll be looking at the largest earthquake and tsunami ever recorded in the Mediterranean.
Also, we’ll look at the profound effect of lithology on topography above the Hellenic subduction zone, answering the question why carbonate mountains are often high and steep.

Richard Ott studied Geosciences at the University of Tübingen. He completed his doctorate in 2020 at ETH Zürich, and is since 2021 a Postdoctoral Fellow of the Swiss National Science Foundation based at GFZ Potsdam. His research mainly focuses on tectonic geomorphology and the ways in which topography is generated and degraded over various timescales.

Link to homepage: https://richardott.weebly.com

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The videos are available within the FU intranet, and (only with the password) also from outside the FUB:

How to login: see message sent to GeoColloquium mailing-list, or request access information from geokoll@zedat.fu-berlin.de

1. Introduction by Dirk Scherler

2. Talk: (52 min.)

https://fu-berlin.eu.vbrickrev.com/sharevideo/679b0f78-fd2b-47f2-945f-7030c87eed4c 

29 April 2021

Assoc. Prof. Dr. Esa Heilimo
(University of Turku - Finland)

Evolution of Precambrian crust in Finland

Invited by: Elis Hoffmann

The Precambrian crust of Finland belongs to the Fennoscandian shield, East European craton. The most important events during the evolution of the Finnish bedrock occurred during Archean at 2.9–2.7 Ga and Paleoproterozoic Svecofennian orogeny at 1.93–1.78 Ga. In those events, the continental crust was segregated from the Earth’s mantle in two major (probably complex) orogenies. The most significant of the younger event is the formation of the Mesoproterozoic 1.65–1.54 Ga rapakivi granites.

My research interest is Precambrian plutonic rocks; sources and possible geodynamic settings in which they are formed. Geothermal heat production changed in the Earth during the Archean Proterozoic transition, which had a discernible effect on the geological processes that form continental crust. I am currently forming a research group to the University of Turku under title Crustal Evolution.

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The event will be streamed live on Thursday at 16:15

How to login:

Live video conference: https://bbb.planet.fu-berlin.de/b/geo-gzn-j9j-yc4

1. Introduction by Elis Hoffmann

2. Talk (~ 45 min.)

3. Discussion

24 June 2021

Dr. James Darling
(University of Portsmouth - UK)

New nanoscale views of terrestrial planet evolution

Invited by: Elis Hoffmann

How have the crusts of planetary bodies in our Solar System evolved through time? To answer this question, we need to be able to do a lot with little sample. This talk will summarize some of our recent work using meteorites, Apollo samples and meteorite impact sites on Earth to try and better constrain the timing and nature of major geological processes across the Solar System. We will zoom from the planet to atomic scale along the way!

I studied Geoscience at the University of St Andrews, and then earned my doctorate at the University of Bristol. Following postdoctoral positions at the University of Bern and University of Western Ontario, I joined the University of Portsmouth in 2013. My research group focus on planetary geology and geochronology, including new applications of correlative microscopy and nanoanalytical techniques.

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The videos are available within the FUB intranet, and also from outside the FUB:

1. Introduction by Elis Hoffmann: https://fu-berlin.eu.vbrickrev.com/sharevideo/2ad7e38d-b80f-415d-bff5-1e8eee3cbbfb

2. Talk (~ 55 min.): https://fu-berlin.eu.vbrickrev.com/sharevideo/1df965e7-1e88-409f-9fd9-d24ec84744ef

3. Discussion: Live video conference Thursday,17:00: https://bbb.planet.fu-berlin.de/b/geo-gzn-j9j-yc4

01 July 2021

Dr. Dennis Höning
(Vrije Universiteit Amsterdam - Netherlands)

Planetary habitability controlled by carbonate-silicate cycle feedbacks and biogeochemical processes

Invited by: Lena Noack

The habitability of rocky planets depends on atmospheric greenhouse gases, which are controlled by complex interactions between the mantle, crust, and atmosphere. On Earth, the long-term carbon cycle regulates the climate over millions of years. Applying carbon cycle models to other planets requires a consideration of their tectonic and geological state. In this talk, I will present coupled interior-atmosphere models for different planets with and without plate tectonics. Finally, I will discuss how biogeochemical processes can enhance planetary habitability.

Dennis Höning studied Geophysics at the University of Münster and completed his PhD 2016 at the German Aerospace Center in Berlin. As an Origins Center Research Fellow, he is currently working at the VU Amsterdam, where he focusses on the prospect for life beyond Earth. To this end, he develops Earth System models for different planetary bodies and studies factors that determine their habitability.

Homepage: https://www.dhoening.de

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Presentation available online: from 28 June 2021

1. Talk (~ 52 min.): https://fu-berlin.eu.vbrickrev.com/sharevideo/a5b18ea9-039f-49cf-b05d-de91fa197cad

The video is available within the FUB intranet, and also from outside the FUB.

Live event starts on Thursday, 01 July at 17:00: 
Live video conference: https://bbb.planet.fu-berlin.de/b/geo-gzn-j9j-yc4

2. Introduction by Lena Noack

3. Discussion

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