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Nanodiamond Finding in the Hyblean Shallow Mantle Xenoliths

Most of Earth’s diamonds are connected with deep-seated mantle rocks; however, in recent years, μm-sized diamonds have been found in shallower metamorphic rocks, and the process of shallow-seated diamond formation has become a hotly debated topic. Nanodiamonds occur mainly in chondrite meteorites as...

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Autores principales: Simakov, S. K., Kouchi, A., Mel’nik, N.N., Scribano, V., Kimura, Y., Hama, T., Suzuki, N., Saito, H., Yoshizawa, T.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Nature Publishing Group 2015
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5377066/
https://www.ncbi.nlm.nih.gov/pubmed/26030133
http://dx.doi.org/10.1038/srep10765
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author Simakov, S. K.
Kouchi, A.
Mel’nik, N.N.
Scribano, V.
Kimura, Y.
Hama, T.
Suzuki, N.
Saito, H.
Yoshizawa, T.
author_facet Simakov, S. K.
Kouchi, A.
Mel’nik, N.N.
Scribano, V.
Kimura, Y.
Hama, T.
Suzuki, N.
Saito, H.
Yoshizawa, T.
author_sort Simakov, S. K.
collection PubMed
description Most of Earth’s diamonds are connected with deep-seated mantle rocks; however, in recent years, μm-sized diamonds have been found in shallower metamorphic rocks, and the process of shallow-seated diamond formation has become a hotly debated topic. Nanodiamonds occur mainly in chondrite meteorites associated with organic matter and water. They can be synthesized in the stability field of graphite from organic compounds under hydrothermal conditions. Similar physicochemical conditions occur in serpentinite-hosted hydrothermal systems. Herein, we report the first finding of nanodiamonds, primarily of 6 and 10 nm, in Hyblean asphaltene-bearing serpentinite xenoliths (Sicily, Italy). The discovery was made by electron microscopy observations coupled with Raman spectroscopy analyses. The finding reveals new aspects of carbon speciation and diamond formation in shallow crustal settings. Nanodiamonds can grow during the hydrothermal alteration of ultramafic rocks, as well as during the lithogenesis of sediments bearing organic matter.
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spelling pubmed-53770662017-04-07 Nanodiamond Finding in the Hyblean Shallow Mantle Xenoliths Simakov, S. K. Kouchi, A. Mel’nik, N.N. Scribano, V. Kimura, Y. Hama, T. Suzuki, N. Saito, H. Yoshizawa, T. Sci Rep Article Most of Earth’s diamonds are connected with deep-seated mantle rocks; however, in recent years, μm-sized diamonds have been found in shallower metamorphic rocks, and the process of shallow-seated diamond formation has become a hotly debated topic. Nanodiamonds occur mainly in chondrite meteorites associated with organic matter and water. They can be synthesized in the stability field of graphite from organic compounds under hydrothermal conditions. Similar physicochemical conditions occur in serpentinite-hosted hydrothermal systems. Herein, we report the first finding of nanodiamonds, primarily of 6 and 10 nm, in Hyblean asphaltene-bearing serpentinite xenoliths (Sicily, Italy). The discovery was made by electron microscopy observations coupled with Raman spectroscopy analyses. The finding reveals new aspects of carbon speciation and diamond formation in shallow crustal settings. Nanodiamonds can grow during the hydrothermal alteration of ultramafic rocks, as well as during the lithogenesis of sediments bearing organic matter. Nature Publishing Group 2015-06-01 /pmc/articles/PMC5377066/ /pubmed/26030133 http://dx.doi.org/10.1038/srep10765 Text en Copyright © 2015, Macmillan Publishers Limited http://creativecommons.org/licenses/by/4.0/ This work is licensed under a Creative Commons Attribution 4.0 International License. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in the credit line; if the material is not included under the Creative Commons license, users will need to obtain permission from the license holder to reproduce the material. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/
spellingShingle Article
Simakov, S. K.
Kouchi, A.
Mel’nik, N.N.
Scribano, V.
Kimura, Y.
Hama, T.
Suzuki, N.
Saito, H.
Yoshizawa, T.
Nanodiamond Finding in the Hyblean Shallow Mantle Xenoliths
title Nanodiamond Finding in the Hyblean Shallow Mantle Xenoliths
title_full Nanodiamond Finding in the Hyblean Shallow Mantle Xenoliths
title_fullStr Nanodiamond Finding in the Hyblean Shallow Mantle Xenoliths
title_full_unstemmed Nanodiamond Finding in the Hyblean Shallow Mantle Xenoliths
title_short Nanodiamond Finding in the Hyblean Shallow Mantle Xenoliths
title_sort nanodiamond finding in the hyblean shallow mantle xenoliths
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5377066/
https://www.ncbi.nlm.nih.gov/pubmed/26030133
http://dx.doi.org/10.1038/srep10765
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