Browsing Fakultät für Geowissenschaften und Geographie (inkl. GAUSS) by Referee "Webb, Sharon Prof. Dr."
Now showing items 1-14 of 14
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The Distribution of Water in the Lunar Magmatic Ocean
(2023-07-17)Water plays an important role for many geological and organic processes. Nevertheless, it is still unclear why our Earth has such large quantities of it. Either it has been part of the building blocks of our planet or was ... -
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 ... -
Experimentelle Untersuchungen zu Mechanismen von druck- und temperaturinduzierten Phasenübergängen
(2021-10-18)Under the influence of pressure and/or temperature changes, crystalline materials undergo a phase transition. The directions of the crystalline unit cell before and after the phase transition can show orientation relations. ... -
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 ... -
Unmixing of Phosphorus-bearing Melts on Earth and Mars
(2019-04-17)The aim of this study lies in the investigation on unmixing in aluminosilicate melts. Therefore, six glasses of peralkaline and peraluminous compositions were synthesized in the system CaO-Al2O3-SiO2, Na2O-Al2O3-SiO2 and ... -
Influence of oxygen fugacity on the viscosity of CO2-, H2O-, and halogen-bearing basaltic melts
(2019-03-04)Abstract The aim of this study is to demonstrate the effect of chlorine (Cl-), fluorine (F-), water (H2O) and carbon dioxide (CO2) on the viscosity of basaltic melts and a comparison to literature models. The basaltic ... -
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 ... -
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 ... -
Paläoproterozoisches Krustenwachstum (2.0-1.8 Ga) am Beispiel der Västervik-Region in SE-Schweden und dem Kamanjab Inlier in NW-Namibia
(2013-02-04)Whole rock geochemical analyses using major and trace elements in combination with the Sm-Nd, Rb-Sr, K-Ar and U-Pb isotope systems as well as studies of P-T conditions on metamorphic rocks from the Västervik-area (SE-Sweden), ... -
Electrical conductivity and hydrogen diffusion in synthetic orthopyroxene single-crystals
(2011-03-22)Charge transport mechanisms and the proton contribution to electrical conductivity of syn-thetic orthopyroxene single crystals could be inferred by combining results from hydrogen diffusivity ... -
Electromagnetic radiation as a tool to determine actual crustal stresses - applications and limitations
(2010-05-25)In the last decades natural Electro Magnetic Radiation (EMR) has gained more and more attention in the fields of material sciences and geosciences. Since EMR precedes material failure, it ... -
Variations in magma composition in time and space along the Central Andes (13°S-28°S)
(2006-11-01)Meso-Cenozoic magmatic arc systems of the Central Andes (CA) result from the subduction of the Nazca Plate beneath the South America plate since Jurassic time, the arc progressively shifted ... -
Struktur-Eigenschaftskorrelationen in den silberionenleitenden Systemen AgI-AgMxOy (M=P,Cr,Mo)
(2003-07-22)Silver iodide silver oxyacid salts of the general composition AgI-AgMxOy (M=V, Nb, Ta, Cr, Mo, W,.....B, Ge, P, As, S, Se, Te) are important model substances for the investigation of ... -
An unusually complete suite of eclogite types: Eclogite xenoliths from the Zero kimberlite, South Africa
(2003-04-14)This first investigation of eclogite xenoliths sampled by the Zero kimberlite show that the suite is exceptional concerning kimberlite age and diversity of eclogite types. The Zero kimberlite ...