1,342 research outputs found
Völkerrechtliche Beurteilung der US-Sanktionen gegen den Bau der Nord Stream 2 Pipeline sowie deren Ursprünge und Folgen
No full texteingereicht von cand. iur. Lukas BaumgartnerDiplomarbeit Universität Innsbruck 202
Völkerrechtliche Beurteilung der US-Sanktionen gegen den Bau der Nord Stream 2 Pipeline sowie deren Ursprünge und Folgen
No full texteingereicht von cand. iur. Lukas BaumgartnerDiplomarbeit Universität Innsbruck 202
Limitations and possibilities in painting: tracing the unrepresentable
No full textM.F.A.Includes bibliographical references (p. 13)by Viktor Lukas Witkowsk
Transport-controlled hydrothermal replacement of calcite by Mg-carbonates
Get PDFDolomitization is one of the most important diagenetic processes, but the reaction rate and time scale of dolomitization remain a topic of controversy. We conducted experiments in which the reaction of single calcite crystals with a Mg-rich fluid at 200 °C leads to the formation of a zoned reaction rim consisting of magnesite and, for intermediate times, Ca-rich dolomite. From detailed documentation of the evolution of the microtexture and chemical composition of the reaction rim, we infer a kinetic model for calcite replacement by Mg-carbonates. The chemical gradient for the structure-forming elements Mg and Ca in the reaction rim and the evolution of the rim thickness strongly indicate that the overall reaction rate is controlled by diffusive transport through the porous reaction rim. The composition of the product phases is kinetically controlled and records the local composition of the interfacial fluid without requiring oversaturation of the reservoir fluid. Reactive transport models on dolomitization processes assume that the rate of dolomitization depends on the rate of dolomite precipitation, which is contradictory to our experimental evidence. Modeling carbonate replacement in natural systems requires detailed knowledge on the evolution of the microstructure controlling the physicochemical transport properties of elements in the pore fluid
Timing and thermal evolution of fold-and-thrust belt formation in the Ultima Esperanza District, 51°S Chile: Constraints from K-Ar dating and illite characterization
Get PDFK/Ar dating on llite in Upper Cretaceous low-grade metamorphic pelites in the Torres del Paine area was used to set new time constraints on the development of the Patagonian retroarc fold-and-thrust belt (FTB) caused by the subduction of the Antarctic Plate beneath the South American Plate. The combined use of illite crystallinity (Kübler Index), polytype quantification and K/Ar dating of illite fractions (<0.2, <2 and 2-6 µm) allowed to distinguish four distinct periods of illite growth based on their K/Ar ages and degree of regional metamorphism: (1) early Cenomanian (98 Ma) illite crystallization, (2) widespread early Campanian (ca. 80 Ma) diagenetic illite growth under anchizonal metamorphic conditions, (3) a significant period of illite formation in the early Paleocene (ca. 60 Ma), and (4) a late stage of illite growth in the early Eocene (55-46 Ma) under epizonal conditions. The earliest indication for the emergent FTB formation in the hinterland is documented in a metapelitic clast (14-9, <2 µm) within the Upper Cretaceous Cerro Toro conglomerate which yields a K/Ar cooling age of 98.3±1.2 Ma and an epizonal KI value of 0.24 ∆°2Θ. After a certain period of geological quietness an interval of major thrusting and uplift occurred between ca. 60 and 46 Ma. The east dipping Rio Nutria and Rio Rincon thrusts record the onset of thrust and fold activity which can be placed close to 60 Ma. They also mark the frontal thrust towards the less deformed Magallanes foreland basin. In the western part of the internal domain, widespread fault and thrust activity of the frontal wedge and associated thermal overprint continued and is recorded until 46 Ma by K/Ar illite cooling ages. The flexural subsidence that is driven by the thrust sheet loading in the internal domain was responsible for the eastward migration of the foreland depocenter and the rapid increase of sedimentation rate along the monoclinal belt. No Miocene thrusting nor uplift event has been recorded by K/Ar illite dating in the study area
Economics of credence goods : the effect of monitoring and its costs in the health care market
No full textauthor: Lukas SchönerMasterarbeit University of Innsbruck 201
Economics of credence goods : the effect of monitoring and its costs in the health care market
No full textauthor: Lukas SchönerMasterarbeit University of Innsbruck 201
Tailoring comonomer incorporation in Ziegler-Natta based Linear Low Density Polyethylene
No full textAuthor DI Lukas GöpperlDissertation Johannes Kepler Universität Linz 202
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