Brown diamonds from an eclogite xenolith from Udachnaya kimberlite, Yakutia, Russia
Abstract: We have performed petrographic and spectroscopic studies of brown diamonds from an eclogite xenolith from the Udachnaya pipe (Yakutia, Russia). Brown diamonds are randomly intermixed with colorless ones in the rock and often located at the grain boundaries of clinopyroxene and garnet. Brow...
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Online Access: | http://hdl.handle.net/1885/67224 https://doi.org/10.1016/j.saa.2011.01.006 https://openresearch-repository.anu.edu.au/bitstream/1885/67224/7/Stepanov_Brown_Diamonds.pdf.jpg https://openresearch-repository.anu.edu.au/bitstream/1885/67224/9/C1-11-Brown_diamonds_from_an_eclogite_xenolith_from_Udachnaya_kimberlite.pdf.jpg https://openresearch-repository.anu.edu.au/bitstream/1885/67224/11/01_Stepanov_Brown_diamonds_from_an_2011.pdf.jpg https://openresearch-repository.anu.edu.au/bitstream/1885/67224/13/02_Stepanov_Brown_diamonds_from_an_2011.pdf.jpg |
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ftanucanberra:oai:openresearch-repository.anu.edu.au:1885/67224 2024-01-14T10:11:21+01:00 Brown diamonds from an eclogite xenolith from Udachnaya kimberlite, Yakutia, Russia Stepanov, Aleksandr Korsakov, Andrey V Yuryeva, Olga P. Nadolinniy, Vladimir A. Perraki, Maria De Gussem, Kris Vandenbeele, Peter http://hdl.handle.net/1885/67224 https://doi.org/10.1016/j.saa.2011.01.006 https://openresearch-repository.anu.edu.au/bitstream/1885/67224/7/Stepanov_Brown_Diamonds.pdf.jpg https://openresearch-repository.anu.edu.au/bitstream/1885/67224/9/C1-11-Brown_diamonds_from_an_eclogite_xenolith_from_Udachnaya_kimberlite.pdf.jpg https://openresearch-repository.anu.edu.au/bitstream/1885/67224/11/01_Stepanov_Brown_diamonds_from_an_2011.pdf.jpg https://openresearch-repository.anu.edu.au/bitstream/1885/67224/13/02_Stepanov_Brown_diamonds_from_an_2011.pdf.jpg unknown Elsevier 1386-1425 http://hdl.handle.net/1885/67224 doi:10.1016/j.saa.2011.01.006 https://openresearch-repository.anu.edu.au/bitstream/1885/67224/7/Stepanov_Brown_Diamonds.pdf.jpg https://openresearch-repository.anu.edu.au/bitstream/1885/67224/9/C1-11-Brown_diamonds_from_an_eclogite_xenolith_from_Udachnaya_kimberlite.pdf.jpg https://openresearch-repository.anu.edu.au/bitstream/1885/67224/11/01_Stepanov_Brown_diamonds_from_an_2011.pdf.jpg https://openresearch-repository.anu.edu.au/bitstream/1885/67224/13/02_Stepanov_Brown_diamonds_from_an_2011.pdf.jpg Spectrochimica Acta: part A Keywords: Brown diamonds Clinopyroxenes Diamond band Eclogites External force He-Ne lasers Local stress Raman bands Raman peak Short periods Spectral feature Spectroscopic studies Surface conditions Udachnaya pipe Yakutia Defects Deformation Grain Brown diamonds Diamond deformation Eclogite xenolith Infrared spectroscopy Raman spectroscopy Journal article ftanucanberra https://doi.org/10.1016/j.saa.2011.01.006 2023-12-15T09:34:22Z Abstract: We have performed petrographic and spectroscopic studies of brown diamonds from an eclogite xenolith from the Udachnaya pipe (Yakutia, Russia). Brown diamonds are randomly intermixed with colorless ones in the rock and often located at the grain boundaries of clinopyroxene and garnet. Brown diamonds can be characterized by a set of defects (H4, N2D and a line at 490.7 nm) which are absent in colorless diamonds. This set of defects is typical for plastically deformed diamonds and indicates that diamonds were likely annealed for a relatively short period after deformation had occurred. Excitation of brown colored zones with a 632.8 nm He-Ne laser produced the typical diamond band plus two additional bands at 1730 cm -1 and 3350 cm -1. These spectral features are not genuine Raman bands, and can be attributed to photoluminescence at ∼710 nm (1.75 eV) and ∼802 nm (1.54 eV). No Raman peak corresponding to graphite was observed in regions of brown coloration. Comparison with previous reports of brown diamonds from eclogites showed our eclogitic sample to have a typical structure without signs of apparent deformation. Two mechanisms with regard to diamond deformation are proposed: deformation of eclogite by external forces followed by subsequent recrystallization of silicates or, alternatively, deformation by local stress arising due to decompression and expansion of silicates during ascent of the xenolith to surface conditions. Article in Journal/Newspaper Yakutia Australian National University: ANU Digital Collections Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy 80 1 41 48 |
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Australian National University: ANU Digital Collections |
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ftanucanberra |
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unknown |
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Keywords: Brown diamonds Clinopyroxenes Diamond band Eclogites External force He-Ne lasers Local stress Raman bands Raman peak Short periods Spectral feature Spectroscopic studies Surface conditions Udachnaya pipe Yakutia Defects Deformation Grain Brown diamonds Diamond deformation Eclogite xenolith Infrared spectroscopy Raman spectroscopy |
spellingShingle |
Keywords: Brown diamonds Clinopyroxenes Diamond band Eclogites External force He-Ne lasers Local stress Raman bands Raman peak Short periods Spectral feature Spectroscopic studies Surface conditions Udachnaya pipe Yakutia Defects Deformation Grain Brown diamonds Diamond deformation Eclogite xenolith Infrared spectroscopy Raman spectroscopy Stepanov, Aleksandr Korsakov, Andrey V Yuryeva, Olga P. Nadolinniy, Vladimir A. Perraki, Maria De Gussem, Kris Vandenbeele, Peter Brown diamonds from an eclogite xenolith from Udachnaya kimberlite, Yakutia, Russia |
topic_facet |
Keywords: Brown diamonds Clinopyroxenes Diamond band Eclogites External force He-Ne lasers Local stress Raman bands Raman peak Short periods Spectral feature Spectroscopic studies Surface conditions Udachnaya pipe Yakutia Defects Deformation Grain Brown diamonds Diamond deformation Eclogite xenolith Infrared spectroscopy Raman spectroscopy |
description |
Abstract: We have performed petrographic and spectroscopic studies of brown diamonds from an eclogite xenolith from the Udachnaya pipe (Yakutia, Russia). Brown diamonds are randomly intermixed with colorless ones in the rock and often located at the grain boundaries of clinopyroxene and garnet. Brown diamonds can be characterized by a set of defects (H4, N2D and a line at 490.7 nm) which are absent in colorless diamonds. This set of defects is typical for plastically deformed diamonds and indicates that diamonds were likely annealed for a relatively short period after deformation had occurred. Excitation of brown colored zones with a 632.8 nm He-Ne laser produced the typical diamond band plus two additional bands at 1730 cm -1 and 3350 cm -1. These spectral features are not genuine Raman bands, and can be attributed to photoluminescence at ∼710 nm (1.75 eV) and ∼802 nm (1.54 eV). No Raman peak corresponding to graphite was observed in regions of brown coloration. Comparison with previous reports of brown diamonds from eclogites showed our eclogitic sample to have a typical structure without signs of apparent deformation. Two mechanisms with regard to diamond deformation are proposed: deformation of eclogite by external forces followed by subsequent recrystallization of silicates or, alternatively, deformation by local stress arising due to decompression and expansion of silicates during ascent of the xenolith to surface conditions. |
format |
Article in Journal/Newspaper |
author |
Stepanov, Aleksandr Korsakov, Andrey V Yuryeva, Olga P. Nadolinniy, Vladimir A. Perraki, Maria De Gussem, Kris Vandenbeele, Peter |
author_facet |
Stepanov, Aleksandr Korsakov, Andrey V Yuryeva, Olga P. Nadolinniy, Vladimir A. Perraki, Maria De Gussem, Kris Vandenbeele, Peter |
author_sort |
Stepanov, Aleksandr |
title |
Brown diamonds from an eclogite xenolith from Udachnaya kimberlite, Yakutia, Russia |
title_short |
Brown diamonds from an eclogite xenolith from Udachnaya kimberlite, Yakutia, Russia |
title_full |
Brown diamonds from an eclogite xenolith from Udachnaya kimberlite, Yakutia, Russia |
title_fullStr |
Brown diamonds from an eclogite xenolith from Udachnaya kimberlite, Yakutia, Russia |
title_full_unstemmed |
Brown diamonds from an eclogite xenolith from Udachnaya kimberlite, Yakutia, Russia |
title_sort |
brown diamonds from an eclogite xenolith from udachnaya kimberlite, yakutia, russia |
publisher |
Elsevier |
url |
http://hdl.handle.net/1885/67224 https://doi.org/10.1016/j.saa.2011.01.006 https://openresearch-repository.anu.edu.au/bitstream/1885/67224/7/Stepanov_Brown_Diamonds.pdf.jpg https://openresearch-repository.anu.edu.au/bitstream/1885/67224/9/C1-11-Brown_diamonds_from_an_eclogite_xenolith_from_Udachnaya_kimberlite.pdf.jpg https://openresearch-repository.anu.edu.au/bitstream/1885/67224/11/01_Stepanov_Brown_diamonds_from_an_2011.pdf.jpg https://openresearch-repository.anu.edu.au/bitstream/1885/67224/13/02_Stepanov_Brown_diamonds_from_an_2011.pdf.jpg |
genre |
Yakutia |
genre_facet |
Yakutia |
op_source |
Spectrochimica Acta: part A |
op_relation |
1386-1425 http://hdl.handle.net/1885/67224 doi:10.1016/j.saa.2011.01.006 https://openresearch-repository.anu.edu.au/bitstream/1885/67224/7/Stepanov_Brown_Diamonds.pdf.jpg https://openresearch-repository.anu.edu.au/bitstream/1885/67224/9/C1-11-Brown_diamonds_from_an_eclogite_xenolith_from_Udachnaya_kimberlite.pdf.jpg https://openresearch-repository.anu.edu.au/bitstream/1885/67224/11/01_Stepanov_Brown_diamonds_from_an_2011.pdf.jpg https://openresearch-repository.anu.edu.au/bitstream/1885/67224/13/02_Stepanov_Brown_diamonds_from_an_2011.pdf.jpg |
op_doi |
https://doi.org/10.1016/j.saa.2011.01.006 |
container_title |
Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy |
container_volume |
80 |
container_issue |
1 |
container_start_page |
41 |
op_container_end_page |
48 |
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1788066257491197952 |