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 8 of 8 for “"Fe-isotopes"”.
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Iron inputs from sediments to the oceans
… thesis explores the nature and ubiquity of iron (Fe) inputs from sediments to the<br/>oceans. In the last 10 years continental shelf sediments have become widely recognised<br/>as important vectors for dissolved Fe inputs to the oceans, where bacterial dissimilatory<br/>Fe-reduction (DIR) promotes …
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Iron Isotope Cosmochemistry
… the 4th most abundant in the crust and mantle; Fe is involved in every stage of planetary formation and differentiation. Iron isotope ratios are robust process tracers used to understand the origin of the Solar System, planetary formation, and differentiation processes such as the moon-forming …
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Variations in δ56Fe during magma differentiation at Cedar Butte volcano: signatures of thermal diffusion?
… To gain additional constraint on how magma differentiation from basalt to rhyolite might occur, I undertook an investigation of non-traditional stable isotope ratios in a suite of Cedar Butte lavas; I analyzed iron isotope ratios at UIUC by high resolution MC-ICPMS while the same samples were …
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The chemistry of iron in hydrothermal plumes
… hydrothermal vents in the global marine Fe<br/>budget. While debate continues over the sources of dissolved Fe to the global deep-ocean<br/>dissolved Fe budget, it had been presumed, until recently, that all the Fe emitted from<br/>hydrothermal vents precipitates and sinks to the seafloor …
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Isotopic and Elemental Compositions of Stardust and Protosolar Dust Grains in Primitive Meteorites
… silicate grains from the primitive chondrites, Acfer 094, SAH 97096, and ALHA77307. Oxygen-anomalous, C-anomalous, and N-anomalous grains were identified by O, C, and N isotopic imaging, respectively, using the NanoSIMS 50. Subsequently, the elemental compositions of the grains carrying the …
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Spatially controlled Fe isotope variations at Torres Del Paine
… stable isotope ratios in igneous rocks with differentiation index. We present new Fe isotope data for the Torres del Paine igneous complex in southern Chile. The multi-composition pluton consists of a 1.5 km vertical exposure of homogenous granite overlying a contemporaneous and possibly …
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How similar are silicic volcanic and plutonic systems? New insights into upper crustal storage conditions and formation processes of ignimbrites
Submission published under a 24 month embargo labeled 'U of I Access', the embargo will last until 2025-05-01
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Petrology and geochemistry of Sangeang Api and recent volcanism in the Sumbawa-Flores sector of the Sunda Arc: the response of along-arc geochemistry to subduction processes.
… compaction or post crystallisation intrusion. Fe-isotope studies of the Sangeang Api products shows that the lavas record δ⁵⁷Fe compositions (average = 0.099‰ ±0.051) typical of arc settings. Cumulate xenoliths record heavy Fe-isotope compositions compared to the lavas (mean δ⁵⁷Fegabbro = …