Sökning: "petrogenesis"
Hittade 4 uppsatser innehållade ordet petrogenesis.
1. Origin of Silicic Magmatism at the Katla Volcano, South Iceland
Master-uppsats, Uppsala universitet/Institutionen för geovetenskaperSammanfattning : Katla volcano, South Iceland, is a bimodal volcanic system hosting an unusual high number of silicic rocks within a basaltic rift setting. The petrogenesis of silica-rich rocks at Katla is controversial and two end-member hypotheses have been suggested. LÄS MER
2. Laser Ablation in Magnetites; Unravelling the Signatures of Trace Element Patterns for Ore Petrogenesis : Trace element signatures of magnetite linked to metallogenesis of iron mineralizations of the Kiruna type
Master-uppsats, Uppsala universitet/Institutionen för geovetenskaperSammanfattning : Trace element analyses of magnetite samples from multiple ore deposits worldwide have recently been conducted, using both EPMA and LA-ICPMS, in order to try and understand the petrogenesis of Kiruna-type ore deposits. Here I employ literature data and new data from Kiruna and Grängesberg (Sweden) to help constrain and visualise evolutionary trends recorded by our samples and derive an overall model for the evolutionary processes that lead to Kiruna-type deposits. LÄS MER
3. Petrogenesis of Carbonatites in the Alnö Complex, Central Sweden
Master-uppsats, Institutionen för geovetenskaperSammanfattning : The Alnö Complex is a Late Precambrian alkaline and carbonatite intrusion (c. 30km2) into Early Proterozoic country rock that extends from the north east, to the north western shoulder of Alnö Island. LÄS MER
4. Petrology of Birimian granitoids in southern Ghana : petrography and petrogenesis
Kandidat-uppsats, Lunds universitet/Geologiska institutionenSammanfattning : Den Paleoproterozoiska Birimiska terrinen består av vulkaniska och sedimentära bergarter i grönstensbälten och metasedimentära bassänger som har blivit intruderade av två generationer granitoider. Den Birimiska terrinen utgör en stor del av den västafrikanska kratonen. LÄS MER