Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 5 of 5 for “"Picrite"”.
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The geochronology and geochemistry of Karoo volcanics in the Lebombo and adjacent areas
… Lebombo monocline, nephelinites overlain by picrite basalts occur in the northern part of the volcanic succession whereas over the remaining area olivine-poor basalts are dominant. Rhyolitic volcanics in the form of massive flows overlie the basaltic rocks and attain their maximum thickness …
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Geology of the Ajax East and Ajax West, silica-saturated alkalic copper-gold porphyry deposits, Kamloops, South-Central British Columbia
… rock units: Nicola Group volcanic rocks, picrite and nine intrusive units ranging in composition from diorite or gabbro to quartz monzonite. The Ajax deposits occur at the intersection of two major dioritic phases of the Iron Mask pluton, the hybrid diorite and the younger Sugarloaf …
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Quantifying Crustal Assimilation in Historical to Recent (1329-2005) Lavas at Mt. Etna, Italy: Insights from Thermodynamic Modeling
… magma that is a high-Mg (~17 wt.% MgO) basalt to picrite composition. Such a magma is documented in Etna’s ~4 ka pyroclastic fallout deposit. The observed post-1971 whole rock trends and mineral compositions are reproduced via stoping and assimilation of skarn and flysch, which compose the …
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Timescales of magma residence and transport underneath Iceland
The focus of this thesis is the development and application of a new method of diffusion chronometry known as DFENS (Diffusion chronometry using Finite Elements and Nested Sampling). This method combines a flexible finite element numerical model with a nested sampling Bayesian inversion to provide …