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From the 2015 I develop my PhD at the University of Geneva, with collaborations with the University of Lausanne, University of Berkeley, British Antarctic Survey, Instituto Antártico Chileno and the University of Chile. This was funded by the Chilean Antarctic Institute (INACH) and the University of Geneva. I was supervised by Richard Spikings and guided by Teal Riley , David Chew, David Shuster, Massimo Chiaradia and Urs Schaltegger.
The project aim was to better constrain the tecotnic evolution of the Antarctic Peninsula, and resulted in a Mesozoic-Cenozoic study of the Antarctic Peninsula and Patagonia. The methods used were:
Ar/Ar in groundmass and hornblende , isotopic tracing of Sr-Nd-Pb in bulk-rock and Hf in zircon (University of Geneva),
U-Pb LA-ICP-MS in zircon and bulk-rock geochemistry (University of Lausanne),
U-Pb in apatite (Trinity College of Dublin)
(U-Th)/He in apatite and zircon (University of California, Berkeley)
Bastias et al. (2021) - Lithos
Bastias et al. (2021) - Lithos
What is the origin of the Jurassic igneous rocks in the Antarctic Peninsula and Patagonia?
What is the consistency of the plume-triggered magmatism during the Jurassic in Patagonia?
Is the Antarctic Peninsula an authocthonous piece of crust of Gondwana?
What is the age of the Eastern Palmer Land Shear Zone?
find more HERE
Bastias et al. (2021) - Data in Brief
Bastias et al. (2021) - Data in Brief
Compilation od raw and processes data collected throughout my PhD
Triassic, Jurassic and Cretaceous dataset
Geochronology, isotopic tracing and geochemistry
find more HERE
Bastias et al. (2020) -Gondwana Research
Bastias et al. (2020) -Gondwana Research
Triassic orthogneisses of the Antarctic Peninsula provide evidence for the Palaeozoic and Mesozoic geological evolution of southern Gondwana within Pangaea
Was an active margin present in the Antarctic Peninsula during the Triassic?
Is the Antarctic Peninsula an authocthonous piece of crust of Gondwana?
What is the age of the Eastern Palmer Land Shear Zone?
find more HERE
Riley et al. (2019) - Earth & Planetary Science Letters
Riley et al. (2019) - Earth & Planetary Science Letters
The tectonic evolution of the Scotia Sea is critical to interpreting how ocean gateways developed during the Cenozoic
Metasedimentary rocks of the North Scotia Ridge share a strong geological affinity with the Fuegian Andes and South Georgia, indicating a common geological history and no direct affinity to the Antarctic Peninsula
Reinterpretation of the gravity and magnetic anomalies indicate that the architecture of the W7 spreading segment is distinct to the other segments of the West Scotia Ridge
find more HERE
Bastias et al. (2019) - International Geology Review
Bastias et al. (2019) - International Geology Review
Was is the age of the oldest volcanism in the South Shetland Islands?
Does the volcanism migrates towards the north-east with younger ages?
Are the fore-arc sediments related or somehow correlated throuhgout the Mesozoic in the west coast of the Antarctic Penisula?
Could be the Byers Basin and the Larse Basin correlatives?
find more HERE
Hebel et al. (2018) - Frontiers in Ecology and Evolution
Hebel et al. (2018) - Frontiers in Ecology and Evolution
Genetic structure of mosses in the Antarctic Peninsula
Several ice advances and retreats events in last thousands of years in Patagonia and Antarctica driven different processes of speciation
Results suggest genetic connectivity among bioregions of South Patagonia and Antarctica
find more HERE
Hernandez et al. (2018) - Polar Research
Hernandez et al. (2018) - Polar Research
Can we relate the micro-structural features in the minerals with depositational environments: i.e. lacustrine sediments?
How does the recent sediments look under SEM in polar regions?
Micro-texture analysis of quartz, magnetite and various plagioclase grains show micro-features that reveal a complex weathering–diagenesis history tentatively extending into the Paleogene
find more HERE
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