Shock-Induced Chemical Reaction between Iron and Enstatite

Xiu Fang Chen; Chao Ping Zhang

doi:10.4028/www.scientific.net/AMR.703.41

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HomeAdvanced Materials ResearchAdvanced Materials Research Vol. 703Shock-Induced Chemical Reaction between Iron and...

Shock-Induced Chemical Reaction between Iron and Enstatite

Abstract:

By using a two-stage light gas gun, two experiments of shock recovery experiments with initial sample of Fe+(Mg, Fe)SiO₃(En) were conducted between 78 and 113 GPa shock pressure (the corresponding temperature is estimated as 3000~5000K). The recovered samples were analyzed by X-ray Diffraction (XRD).The XRD observation at the middle section of two recovered samples illustrates the new composition of recovered samples is (Mg, Fe)₂SiO₄.Comparing with the recovery experiments of MgO+SiO₂ ,we can infer that iron and perovskite react to form SiO₂ and (Mg, Fe)O. The experiments result indicates that reaction between liquid iron and (Mg, Fe)SiO₃perovskite may occur at the core-mantle boundary in geological history. The reaction creates a very heterogeneous zone at the base of the mantle. Si and O dissolved in liquid iron are rapidly dispersed by the flow of the liquid outer core.

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Advanced Materials Research (Volume 703)

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41-44

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https://doi.org/10.4028/www.scientific.net/AMR.703.41

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June 2013

Authors:

Xiu Fang Chen, Chao Ping Zhang

Keywords:

Chemical Reaction, Enstatite, Shock Compression, XRD Microanalysis

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