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Showing 1 to 17 of 17 for “"melting processes"”.
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Melting processes in small basaltic systems: the Auckland Volcanic Field, New Zealand
… of their magmatic system from the inception of melting, to the processes that affect magmas on their ascent. The Auckland Volcanic Field (AVF) of northern New Zealand is a Quaternary intraplate basaltic volcanic field of c. 50 eruptive centres located over an area c. 360km2. The field has been …
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Experimental Constraints on Melting Processes in the Earth and Small Rocky Bodies
… by the melt generation and crystallization processes in their interiors. This thesis investigates large-scale igneous processes in the Earth, the Moon, and the Angrite Parent Body using a multidisciplinary approach that integrates high-pressure experiments, geochemical analysis, and …
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Mantle melting processes: evidences from ophiolites, large igneous provinces, and intraplate seamounts
Melting processes in the mantle have a key role in plate tectonics and in the most colossal phenomena in the Earth, like large igneous provinces, mantle plume upwellings, and the constant growth of the planet's tectonic plates. In this study we use the geochemical and petrological evidence …
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The effects of high temperature metamorphic and melting processes on granulite-facies rocks
… research on high-temperature metamorphic processes. A recent development in petrological modelling of granulite facies rocks is reintegration of melt generated and lost during metamorphism. The aim of melt reintegration is to create bulk compositions suitable for modelling prograde …
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Geochemistry of Variscan lamprophyre magmatism in the Saxo-Thuringian Zone
… rocks not only provide important information on melting processes in the mantle, but also on geodynamic processes modifying the mantle. There are numerous occurrences of lamprophyres in the Saxo-Thuringian Zone of Variscan Central Europe, which are useful to track the variable effects of the …
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The influence of ridge geometry at the ultraslow-spreading Southwest Indian Ridge (9⁰-25⁰E) : basalt composition sensitivity to variations in source and process
… well established until now is the importance of melting processes rather than source at spreading rates < 20 mm/yr.
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Seismic and numerical constraints on the formation and evolution of oceanic lithosphere
… of oceanic lithosphere that are shaped by the processes that form the lithosphere. The strength of lithospheric plates relative to the underlying mantle enables the surface plate motions and plate boundary processes that characterize plate tectonics on Earth. Surprisingly, we have a relatively …
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Seismic and numerical constraints on the formation and evolution of ocean lithosphere
… of oceanic lithosphere that are shaped by the processes that form the lithosphere. The strength of lithospheric plates relative to the underlying mantle enables the surface plate motions and plate boundary processes that characterize plate tectonics on Earth. Surprisingly, we have a relatively …
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The influence of ridge geometry at the ultraslow-spreading Southwest Indian Ridge (9º-25ºE) : basalt composition sensitivity to variations in source and process
… well established until now is the importance of melting processes rather than source at spreading rates < 20 mm/yr. Along the orthogonally spreading supersegment (14 mm/yr) moderate degrees of partial melting effectively sample the bulk mantle source, while on the obliquely spreading supersegment …
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Diverse Primitive Basalts from an Extensional Back-arc Setting: Fort Rock Volcanic Field, Oregon
… information of mantle source regions and melting processes through geochemical analyses of major and trace elements to achieve a greater understanding of the complex tectonic framework and eruptive history of the FRVF. Geochemical data was acquired through X-ray fluorescence (XRF) and …
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Behaviours of bifilms in A356 alloy during solidification: developing observation techniques with 3-D micro x-ray tomography
… or acquire a spherical shape because of several processes: the penetration of dissolved hydrogen from the liquid aluminium into the bifilm during solidification, the pushing of oxides by dendrites during solidification, the growth of heterogeneously nucleated intermetallic faces upon the wetted …
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Process and Quality Modeling in Cyber Additive Manufacturing Networks with Data Analytics
… situ data be used to model multiple similar AM processes connected in a CMS (Chapter 3)? (2) How to improve the accuracy of the low-fidelity first-principle simulation (e.g., finite element analysis, FEA) for personalized AM products to validate the product and process designs (Chapter 4) in …
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Characterisation of ocean island basalt sources : St. Helena
… crystal fractionation and subsequent alteration processes. Petrogenetic modelling shows that the genesis of the SHRS is consistent with small degree (1-10%) melting of an olivine - clinopyroxene - orthopyroxene - garnet source containing a residual K-rich phase. Combined Sr-Nd-Pb isotope and …
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Evaluating mantle and crustal processes using isotope geochemistry
… range of topics to evaluate crustal and mantle processes. This study presents Re-Os systematics to constrain the composition, formation and age of the lower continental crust and the mantle lithosphere, examines melt inclusion from oceanic island basalts to evaluate the scale of the mantle …
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Streamflow Generation in alpine Catchments: The role of hydrological and geochemical information
… the complex dynamics of the hydrological processes that characterize these environments, there is still much to disclose. Hence, the interpretation of streamflow sources can become very difficult with water discharge as the sole observed variable. The previous calls for the use of …
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Geochemical and fluid dynamic investigations into the nature of chemical heterogeneity in the Earth's mantle
… relationships of U and Th during the melting of anhydrous peridotite. Clinopyroxene, plagioclase, and to a lesser extent garnet are hosts for Pb in mantle peridotite; however, the role of trace sulfide may exert some control over the abundance and partitioning of Pb in some samples. …