Jack James Percival

Disputas - Master of Science Jack James Percival

Master of Science Jack James Percival will on 25 January at 12.15 publically defence his thesis for the PhD degree in Science.

Title of the PhD thesis:

«Neoproterozoic orogenesis in south-eastern South America - An examination of pre-orogenic rifting, sedimentation, and mountain building processes recorded in the Dom Feliciano Belt»

Popular scientific abstract: 

The Dom Feliciano Belt is an ancient mountain belt (orogen) located in Brazil and Uruguay that originally formed part of an even larger series of mountains extending the length of eastern South America and south-western Africa. The mountains formed over 600 million years ago as part of the supercontinent Gondwana during a mountain building event (orogeny) involving the collision and interactions between tectonic plates. Little of these ancient mountains remain, with much of the rocks now eroded and the remaining pieces buried by sediment or covered by the South Atlantic Ocean. However, rocks from remnants of the mountains can provide geological insights into their formation and tectonic history. This study investigates the age and formation conditions of these rocks to understand how the Dom Feliciano belt formed and how it relates to other ancient mountain belts in the region. Results from three scientific papers give insights into the timing and formation of this orogen that were previously unknown, and demonstrate a direct relationship between the South American and African tectonic systems prior to orogeny. This study has improved our understanding of events that occurred between the breakup of the supercontinent Rodinia and the amalgamation of the subsequent supercontinent Gondwana.
 

 

 Supervisors:

  • Professor Jiri Konopasek, Department of Geosciences, UiT (main supervisor)
  • Professor Holger Stunitz, Department of Geosciences, UiT
  • Professor Maria de Fatima Bitencourt, Institute of Geosciences, Universidade Federal do Rio Grande do Sul

Evaluation Committee:

  • Prof. Haakon Fossen, Department of Geosciences, Natural History Museum in Bergen and UiB (1. Opponent)
  • Assoc. Prof. Petr Jeřábek, Institute of Petrology and Structural Geology, Charles University in Prague, Czech Republic (2. Opponent)
  • Assoc. Prof. Sabina Strmic Palinkas, Department of Geosciences, UiT The Arctic University of Norway (internal member and leader of the committee)

Leader of the public defence:

Dean Arne O. Smalås, Faculty of Science and Technology, UiT, will lead the public defense.

 Opposition ex auditorio:

If you have any questions for the candidate during the public defence, please send an e-mail to leader of the public defence. They will announce your questions during the defence.

 Trial lecture:

The trial lecture is held on Tuesday 25 of January at 10.15 in the same auditorium.

The title of the trial lecture is:

«Collisional versus accretionary orogeny: similarities and differences»

 Streaming:

The trial lecture and the public defense will be streamed via these links:

Audience:

UiT follows the national guidelines regarding infection control. A maximum of 20 people are allowed in the auditorium during the defence, as long as everybody keeps a distance of 1 meter at all times.

When: 25.01.22 at 12.15–15.00
Where: Teknologibygget auditorium 1.022
Location / Campus: Digital, Tromsø
Target group: Employees, Students, Guests
Contact: Camilla Andreassen
E-mail: camilla.andreassen@uit.no
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