Advanced in situ chemical and structural analyses of new minerals representing extreme conditions

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Marco E. Ciriotti
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Iscritto il: ven 25 giu, 2004 11:31
Località: via San Pietro, 55 I-10073 Devesi/Cirié TO - Italy
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Advanced in situ chemical and structural analyses of new minerals representing extreme conditions

Messaggio da Marco E. Ciriotti » lun 23 lug, 2018 15:46

Referenza:
▪ Ma, C. & Tschauner, O. (2018): Advanced in situ chemical and structural analyses of new minerals representing extreme conditions. Goldschmidt Abstracts, 2018

Abstract:
Recent improvements in electron-beam nano-imaging and micro-chemical analysis in combination with novel tools for micrometer-scale structural analysis of minerals from synchrotron X-ray diffraction open a pathway towards in situ and non-destructive studies of mineral paragenesis that were previously not or barely accessible. Often mineral assemblies that represent extreme conditions also pose extreme challenges to analysis: very small size scale, complex matrix, minor amounts of material. Examples of such extreme, but also quite relevantenvironments are: a) High pressure shockmetamorphic minerals in meteorites and terrestrial impact sites, b) inclusions in diamonds from the deep mantle, c) ultra-refractory phases in Ca-Al-inlcusions from the solar nebula, d) presolar condensates. We show how a combination of electron-microscopy based high-resolution imaging and fully quantitative chemical analysis and qualitative structural identification with synchrotron-based structural and semiquantitative chemical techniques establish a powerful tool for discovery and characterization of important and interesting new minerals on micron- to nano-size scales. Presented here are a few examples demonstrating this powerful approach.
Marco E. Ciriotti

«Things are interesting only in so far as they relate themselves to other things»

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