Université de Fribourg

Dehydroxylation kinetics of the serpentine group mine

Trittschack, Roy ; Grobéty, Bernard (Dir.)

Thèse de doctorat : Université de Fribourg, 2013 ; Nr. 1795.

Chemical reactions in general and solid-state reactions in particular are controlled by thermodynamics and kinetics. Whereas thermodynamic rules are used to state whether a phase is stable under a specific set of intensive and extensive parameters or not, kinetics applied to an underlain reaction of interest decipher the time-scale of such a reaction by offering the chance to determine associated...

Université de Fribourg

Benthic foraminifera associated to cold-water coral ecosystems

Margreth, Stephan ; Spezzaferri, Silvia (Dir.)

Thèse de doctorat : Université de Fribourg, 2010 ; no 1686.

Cold-water coral reef ecosystems occur worldwide and are especially developed along the European margin, from northern Norway to the Gulf of Cadiz and into the Western Mediterranean Sea. The dominant reef builder in these areas is the scleractinian coral Lophelia pertusa, often associated with the scleractinian coral Madrepora oculata. These species settle on suitable hard substrates, in...

Université de Fribourg

The Ruminantia (Mammalia, Cetartiodactyla) from the Oligocene to the Early Miocene of Western Europe : systematics, palaeoecology and palaeobiogeography

Mennecart, Bastien ; Strasser, André (Dir.)

Thèse de doctorat : Université de Fribourg, 2012 ; no 1756.

Nowadays, the ruminants are the most ecologically diverse hoofed mammals of the world. All the extent of families (including related species from the Burdigalian) and feeding habits can be deduced from the mandible shape. The Tragulidae possess a small coronoid process, a shortened diastema, and a weak incisura vasorum. The Eupecora have an elongated diastema (extremely extended within the...

Université de Fribourg

Tectonics of the Préalpes Klippen and the subalpine molasse (canton Fribourg, Switzerland)

Matzenauer, Eva ; Mosar, Jon (Dir.)

Thèse de doctorat : Université de Fribourg, 2011 ; no. 1737.

This thesis deals with a structural analysis of the préalpine nappe stack with major focus on the frontal part of the Préalpes Romandes and the Subalpine Molasse. The préalpine nappes underwent a complex paleo- and Alpine tectonic deformation history to attain the present-day position to the NW of the Helvetic nappes and to the SE of the Western Molasse basin. In contrast to most of the...

Université de Fribourg

Tectonics of the Eastern Greater Caucasus in Azerbaijan

Bochud, Martin ; Mosar, Jon (Dir.)

Thèse de doctorat : Université de Fribourg, 2011 ; no. 1733.

The Greater Caucasus is Europe’s largest and highest mountain belt and results from the inversion of the Mesozoic Greater Caucasus back-arc-type basin due to the collision of Arabia and Eurasia. The orogenic processes that led to the present mountain chain started in early Tertiary, accelerated during the Plio- Pleistocene, and are still active nowadays. The Eastern Greater Caucasus (EGC) is...

Université de Fribourg

Tectonics of the Western Swiss molasse basin during Cenozoic times

Ibele, Tobias ; Mosar, Jon (Dir.)

Thèse de doctorat : Université de Fribourg, 2011 ; no. 1714.

The western Swiss Molasse Basin is a fl exural foreland basin that presently is in a wedge-top position above a décollement formed in Triassic evaporites near the base of the underlying Mesozoic units. In front of the western Swiss Molasse Basin, the décollement tectonics led to folding and thrusting of the Jura Mountains. The latter are widely accepted to represent the thin-skinned foreland...

Université de Fribourg

Paléoécologie et taphonomie comparative en milieux carbonatés peu profonds (oxfordien du Jura suisse et holocène du Belize)

Stienne, Noémie ; Strasser, Andreas (Dir.)

Thèse de doctorat : Université de Fribourg, 2010 ; no 1661.

Sediment on tropical platforms stems from terrigeneous sources and from authigenic carbonate production, and the accumulation is also influenced by lateral migration of sedimentary bodies. The qualitative and quantitative evolution of the sediment flow is controlled by allocyclic and autocyclic processes. The studies of Pittet (1996), Plunkett (1997), Dupraz (1999), Hug (2003), and Védrine...

Université de Fribourg

Characterization of chrysotile, tellurium and iImogolite nanotubes

Métraux, Cédric ; Grobéty, Bernard (Dir.) ; Jenny, Titus (Codir.)

Thèse de doctorat : Université de Fribourg, 2008.

The discovery of C60 (R. Smalley et al.) and carbon nanotubes CNTs (S. Iijima) in 1985 and 1991 respectively was a milestone in the field of nanoscience. Since 1991, WS2, MoS2, BN, Se, Te nanotubes were synthesized and analyzed. These nanotubes are promising materials for many applications in the field of catalysis, electronic, polymer synthesis, etc. In this study, we characterized the...