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. 2020 May 22;10:8581. doi: 10.1038/s41598-020-65620-x

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© The Author(s) 2020

Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/.

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SEM microphotographs of SHS-treated pellets. (A) Scoriaceous texture. (B) Detail of A. Granular forsterite and wüstite pave the bubble cavities and globular metallic iron drops, suggesting that the T_melting of iron was attained. (C) Blocky, vesicular texture. (D) Scoriaceous texture showing an outer silicate shell (dark grey), including an inner metallic layer (light grey, arrow on the left). The arrow on the right indicates the inter-growth of globular metallic Fe within olivine. (E) Large globular metallic iron drop. (F) Scoriaceous texture of wüstite + forsterite, including irregularly scattered globular iron drops.