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Research

Currently: CNES postdoc (2019-2020) Constructing a sea level curve from high-resolution topography of world-class coral reef terraces – at ISTerre (Grenoble) with Laurent Husson, Kevin Pedoja, Sonny Aribowo, Anne-Morwenn Pastier, Denovan Chauveau and Christine Authemayou

The research project I am currently working on, focuses on several sites around the world with well-preserved sequences of coral reef terraces. The aim is to study those sequences using high resolution topography, provided by Pleiades satellite imagery of the CNES, and numerical coral reef modeling. By combining the sequences in Barbados, Huon (Papua New Guinea), Sumba, Buton, Alor, Kisar (all Indonesia), Cuba, Haiti and Hawaii, we will attempt to reconstruct a eustatic sea-level curve over the past 0.5-1 million years, consistent with ages and morphostratigraphy of all those sites.

Fieldwork on the SE-Cuban terraces, here posing for the scale of a massive hurricane-deposited boulder

IODP-France postdoc (2018) Paleoseismological record of the Corinth Rift integrated with Quaternary deformation patterns – at IPGP (Paris) with Nathalie Feuillet, Christian Beck and IODP 381 expedition members

The research project I undertook in 2018 at the Institut de Physique du Globe de Paris (IPGP) was within the framework of International Ocean Drilling Project 381: Corinth Rift Development. It focuses on constraining the rift evolutionary history from a paleoseismological perspective. The overall aims are to 1) distinguish earthquake-induced deposits from background sedimentation, 2) establish a chronology and correlate those deposits between different drilling sites, and 3) integrate the earthquake-record with fault slip rates and extension rates to improve our long-term understanding of seismic hazard within the rift. Methods include visual core description, x-ray (micro-)tomography, XRF-scanning, paleomagnetic measurements and radiocarbon dating. As a first step I am working on a paleoseismological record within the most recent ~25 ka of the drilling sites, with the aim to eventually extend this record to ~600 ka within one of the sites.

Visual core description with colleague Sofia Pechlivanidou (University of Bergen) during the IODP-Onshore Science Party in Bremen (February 2018)

PhD thesis (2014-2017) – Plio-Quaternary tectonic changes along the Hellenic Arc (Greece) induced by a propagating plate boundary – at IPGP (Paris) with David Fernández-Blanco, Robin Lacassin, Rolando Armijo, the ITN-ALErT project members and several others

During my 3.5-year PhD at the Institut de Physique du Globe de Paris (IPGP), I investigated when, how, and why vertical tectonic movements along the Hellenic Arc have evolved, using an integrative approach of fieldwork, geomorphology, structural basin analysis, micropaleontology, photogrammetry, cosmogenic nuclide dating and numerical modelling. The high-resolution Digital Elevation Models of several key areas around the arc, which I developed from Pleiades satellite imagery, provided the base for most of my analyses. In the Corinth Rift I improved long-term slip-rate estimates by combining on-and offshore strain markers, and estimated lithospheric scale viscosities from the elastic flexure pattern using finite element modelling. Analysing the Corinth marine terraces with landscape evolution modelling allowed me to explore the effects of sea-level curves on coastal morphology. Combining the results from Corinth with the other studied sites I find that a major change in tectonic regime occurred between 2.5 and 1 Ma along the whole Hellenic Arc, accompanied by rapid accelerations in vertical motions and young upper crustal normal faulting. I attribute this to North Anatolian Fault propagation, causing rift initiation in the Gulf of Corinth and increased plate convergence along the Hellenic subduction zone. As first-author I published two articles, submitted one article and two more articles are in advanced stages of preparation, which I plan to submit before summer 2019.

Drawing and describing the landscape around the Gulf of Corinth during the IPGP Living-Faults field course in Greece (May 2014)

MSc projects (2012-2013) – at Utrecht University (The Netherlands) with Wout Krijgsman, Douwe van Hinsbergen and Marco Maffione and Victoria University (New Zealand) with Gillian Turner

The work of my MSc thesis at the Victoria University of Wellington focused on constructing a Holocene record of geomagnetic secular variation, the results of which have been published in an article I co-authored. The results of an additional MSc project about paleo-spreading directions of Tethyan ocean-floor recorded in Anatolian ophiolites, which I did partly in the Middle East Technical University (Ankara) and partly in Utrecht University, were published in two different articles that I co-authored.

Photo of a compass at Lake Mavora, New Zealand, which was the subject of my MSc thesis on paleomagnetic secular variations. (December 2012)