Joaquin Bastias

PhD candidate

13 rue des Maraîchers, office B46

0223796635

My Research

  • My PhD project, under the supervision of Richard Spikings and Urs Schaltegger, focuses on a combination of geochronology, thermochronology, and structural studies to better understand the tectonic evolution of the continental crust, particularly on the Antarctic Peninsula.

  • Also, I am interested in applying thermochronology to better understand landscape evolution and how this links to the evolution of the biosphere. Particularly, the application of this approach in understanding the connection between flora and fauna of Antarctic Peninsula with that of Patagonia during the Cenozoic.

Research Projects

 
I collaborate with colleagues from Chile, Switzerland, UK, Ireland and USA in different projects that address the tectonic evolution of the Andean and Antarctic Peninsula margin.
  • Project RT0614: Funded by the Chilean Antarctic Institute (INACH) address the thermal evolution of the continental crust of Antarctic Peninsula.

Methods

  • Geochronology: LA-ICP-MS in zircon and 40Ar/39Ar in hornblende and mafic groundmass.
  • Thermochronology: LA-ICP-MS in apatite, 40Ar/39Ar in white mica and biotite, Fission Tracks in apatite and zircons, and (U-Th)/He in apatite and zircons
  • Isotope geochemistry: Hf and O isotopes in zircon and Sr-Nd-Pb in bulk rock.

 Laboratory Experience

Publications
  1. Bastias, J. ; Spikings, R.; Ulianov, A.; Riley, T.; Burton-Johnson, A.; Chiaradia, M.; Baumgartner, L.; Hervé, F. 2020. The Gondwanan margin in West Antarctica: insights from Late Triassic magmatism of the Antarctic Peninsula. Gondwana Research 81, 1-20. DOI: 10.1016/j.gr.2019.10.018
  2. Bastias, J.; Calderon, M.; Israel, L.; Herve, F.; Spikings, R.; Pankhurst, R.; Castillo, P.; Fanning, M.; Ugalder-Oeralta, R. 2019. The Byers Basin: Jurassic-Cretaceous tectonic and depositional evolution of the forearc deposits of the South Shetland Islands and its implications for the northern Antarctic Peninsula. International Geology Review. DOI: 10.1080/00206814.2019.1655669 
  3. Riley, T.; Carter, A.; Leat, P.; Burton-Johnson, A.; Bastias, J.; Spikings, R.; Tate, A.; Bristow, C. 2019. Geochronology and geochemistry of the northern Scotia Sea: A revised interpretation of the North and West Scotia ridge junction. Earth and Planetary Science Letters 518, 136-147. DOI: 10.1016/j.epsl.2019.04.031. 
  4. Hebel, I.; Dacasa-Rüdinger, M.; Jaña, R.; Bastias, J.. 2018. Genetic structure and gene flow of moss Sanionia uncinata (Hedw.) Loeske in maritime Antarctica and Southern-PatagoniaFrontiers in Ecology and Evolution 6, 152. DOI: 10.3389/fevo.2018.00152.
  5. Hernandez, A.; Bastias, J.; Matus, D.; Mahaney, W. 2018. Provenance, transport and diagenesis of sediments in Polar Areas: a case study in Uruguay Lake, King Feorge Islands, Antarctica. Polar Research 37:1. DOI: 10.1080/17518369.2018.1490619.
  6. Bastias, J.; Fuentes, F.; Aguirre, L.; Hervé, F.; Demant, A.; Torres, T. 2016. Very low-grade secondary minerals as indicators of palaeo-hydrothermal systems in the Upper Cretaceous volcanic succession in Hannah Point, Livingston Island, Antarctica. Applied Clay Science 134, 246-256. DOI: 10.1016/j.clay.2016.07.025. 
  7. Otero, R.; Rubilar-Rogers, D.; Simon-Gutstein, C.; Yury-Yañez, R.; Vargas, A.; Bastias, J.; Ramírez, C. 2014. New chondrichthyans from the Late Cretaceous (Campanian-Maastrichtian) of Marambio and James Ross islands, Antarctica. Journal of Paleontology 88(3), 411-420. DOI: 10.1666/13-041
  8. Bastias, J. & Hervé, F. 2013. The Cape Wallace Beds: A Permian-detritus turbidite at Low Island, South Shetlands, Antarctica. Bollettino di Geofisica Teorica ed Applicata 52(2), 312-314.
Fieldwork at Low Island, South Shetland Islands (-63.2, -62.2)

Fieldwork at Low Island, South Shetland Islands (-63.2, -62.2)

Valle Verzasca

Gneisses in Valle Verzasca, Ticino, Switzerland

Glacier meeting the sea in near Fildes Peninsula, South Shetland Islands (-62.1; -58.9)

Glacier meeting the Branfield Strait,near Fildes Peninsula, South Shetland Islands (-62.1; -58.9)

Fieldwork at Yelcho Station (-64.9, -63.6).

Fieldwork at Yelcho Station (-64.9, -63.6)

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