Browsing Fakultät für Geowissenschaften und Geographie (inkl. GAUSS) by Referee "Schmidt, Burkhard Dr."
Now showing items 1-8 of 8
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Composition and compositional zoning of olivine as a tracer for pre-eruptive magmatic processes: Application to Piton de la Fournaise, Laacher See, and Shiveluch volcano
(2020-08-12)This dissertation deals with the reconstruction of pre-eruptive magmatic processes with respect to their timescales. Deep recharges of mafic magma into shallower reservoirs and subsequent magma mixing are assumed to play ... -
Constraints on pre-eruptive magmatic history using multi-faceted diffusion modeling: an analytical, experimental and numerical study
(2020-05-28)Time-scales extracted from chemically zoned minerals provide insights into crystal residence time, magma storage and compositional evolution of magmas and allow better constraints on pre-eruptive history of large and ... -
Entgasung und Kristallisation beim Aufstieg dazitischer Magmen zur Erdoberfläche
(2014-10-29)In this study, kinetic processes during experimentally simulated ascent of dacitic magmas, based on eruption products of Taapaca volcano, were investigated. The focus was on degassing of water saturated samples and the ... -
Fast X-ray diffraction crystal size distribution analysis
(2018-09-11)Fast X-ray Diffraction Crystal Size Distribution analysis (FXD-CSD) constitutes a novel method to determine volume-based crystal size distributions (CSD) of crystalline powders or polycrystalline materials in the lower µm ... -
Generating early continental crust
(2020-07-09)Archean cratons are the products of geodynamic processes governing the evolution of the early Earth. They comprise felsic granitoids enclosed by folded volcano-sedimentary successions. However, these rocks may not be ... -
Raman spectroscopy in Geobiology - Advances in detection and interpretation of organic signatures in rocks and minerals
(2014-01-21)In this thesis, Raman spectroscopy was applied to a broad range of rock types in order to test the ability of detecting and interpreting organic signals. In the field of geobiology Raman spectroscopy is relatively new, and ... -
The Influence of Fluorine, Chlorine and Water on the Rheology and Structure of Na2O-CaO-Al2O3-SiO2 Melts
(2014-05-21)This study investigates the influence of 1.6 to 14.5 mol% water, 1.1 to 18.3 mol% fluorine (F) and 0.5 to 1.4 mol% chlorine (Cl), alone and combined, on the structure and viscosity of peralkaline and peraluminous Na2O CaO ... -
Violence and volume: an experimental study of CO2 driven eruptions of Colli Albani
(2022-04-07)This thesis presents the first rheological investigations of melts from the Colli Albani Volcanic District (CAVD) near Rome (Italy). Despite their silica-poor (< 45 wt%) and ultrapotassic composition – indicating a low ...