Oxygen and Hydrogen Diffusion in Minerals
نویسندگان
چکیده
منابع مشابه
Method for simultaneous oxygen and hydrogen isotope analysis of water of crystallization in hydrated minerals.
The isotopic composition of water in hydrated minerals, such as gypsum and jarosite, has numerous applications in studies of recent climate change, ore formation, and soil development. However, oxygen and hydrogen isotope analysis of water of crystallization is currently a complex procedure. Commonly used techniques involve offline extraction of water from hydrated minerals and subsequent isoto...
متن کاملDiffusion in Minerals and Melts: Theoretical Background
Diffusion is due to thermally activated atomic-scale random motion of particles (atoms, ions and molecules) in minerals, glasses, melts, fluids, and gases (Fig. 1). The random motion leads to a net flux when the concentration (more strictly speaking, the chemical potential) of a component is not uniform. Even though diffusion is a microscopic process, it can lead to macroscopic effects. For exa...
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Although geologists have been thinking and writing about diffusion in minerals, magmas, and rocks since early in the 20th century (e.g., Penrose 1914; Van Orstrand 1915; Bowen 1921; Eskola 1934; Duffell 1937; Reynolds 1947; Garrels 1949), very few experimental measurements of diffusion in minerals by geologists were published until the 1960’s. The development of commercial electron microprobes ...
متن کاملAN ANALYTICAL SOLUTION FOR DIFFUSION AND NONLINEAR UPTAKE OF OXYGEN IN THE RETINA
A simple mathematical model of steady state oxygen distribution subject to diffusive transport and non- linear uptake in a retinal cylinder has been developed. The approximate analytical solution to a reaction- diffusion equation are obtained by using series expansions. The computational results for the scaled variables are presented through graphs. The effect of the important parameters (1) d...
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In the southeast of Iran, titaniferous magnetite deposits associated with the gabbro rocks occur in Kahnuj ophiolitic complex. Mineraloghraphy studies have revealed the primary and secondary ore mineral consist of titanomagnetite, ilmenite, hematite, goethite, martite, pyrite, chalcopyrite, pyrrhotite and silicate minerals (plagioclase, pyroxene, hornblende, olivine, alkali feldspar). Trellis-s...
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ژورنال
عنوان ژورنال: Reviews in Mineralogy and Geochemistry
سال: 2010
ISSN: 1529-6466
DOI: 10.2138/rmg.2010.72.10