The Earliest Generation of Diamond: The First Find of a Diamond Inclusion in Kimberlitic Olivine
Today, it is known that the majority of diamonds are crystallized mostly from a metasomatic agent close in the main characteristics to carbonatite melts acting upon mantle rocks, and therefore, diamonds are located in the interstitial space of these rocks. So far, diamond has never been found includ...
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| Format: | Article |
| Language: | English |
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MDPI AG
2022-12-01
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| Series: | Minerals |
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| Online Access: | https://www.mdpi.com/2075-163X/13/1/36 |
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| author | Lyudmila Pokhilenko Nikolay Pokhilenko Vladimir Malkovets Taisia Alifirova |
| author_facet | Lyudmila Pokhilenko Nikolay Pokhilenko Vladimir Malkovets Taisia Alifirova |
| author_sort | Lyudmila Pokhilenko |
| collection | DOAJ |
| description | Today, it is known that the majority of diamonds are crystallized mostly from a metasomatic agent close in the main characteristics to carbonatite melts acting upon mantle rocks, and therefore, diamonds are located in the interstitial space of these rocks. So far, diamond has never been found included in other kimberlitic or xenolithic minerals. We have found a diamond inclusion inside the kimberlitic olivine grain, which is the first find of its kind. The diamond crystal is to have been captured by the growing olivine at quite high temperatures (more than 1400 °C) early in the history of the cratonic lithospheric mantle formation. The event had taken place long before the depleted peridotite cooled down to the temperature of the Middle Archean cratonic geotherm corresponding to the diamond stability field at depths where carbonatite melts can react with depleted peridotite, making it a diamond-bearing rock. On the one hand, this find provides evidence that diamonds can crystallize from the high-temperature silicate melt with some carbonate component. On the other hand, the diamond was found coexisting with a sulfide inclusion in the same olivine, i.e., crystallization from a sulfide melt may be another way of diamond formation. |
| first_indexed | 2024-03-09T11:38:39Z |
| format | Article |
| id | doaj.art-da9e94746de5487cafcbb290d87bf169 |
| institution | Directory Open Access Journal |
| issn | 2075-163X |
| language | English |
| last_indexed | 2024-03-09T11:38:39Z |
| publishDate | 2022-12-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Minerals |
| spelling | doaj.art-da9e94746de5487cafcbb290d87bf1692023-11-30T23:38:54ZengMDPI AGMinerals2075-163X2022-12-011313610.3390/min13010036The Earliest Generation of Diamond: The First Find of a Diamond Inclusion in Kimberlitic OlivineLyudmila Pokhilenko0Nikolay Pokhilenko1Vladimir Malkovets2Taisia Alifirova3Institute of Geology and Mineralogy SB RAS, Novosibirsk 630090, RussiaInstitute of Geology and Mineralogy SB RAS, Novosibirsk 630090, RussiaInstitute of Geology and Mineralogy SB RAS, Novosibirsk 630090, RussiaDepartment of Lithospheric Research, University of Vienna, 1090 Vienna, AustriaToday, it is known that the majority of diamonds are crystallized mostly from a metasomatic agent close in the main characteristics to carbonatite melts acting upon mantle rocks, and therefore, diamonds are located in the interstitial space of these rocks. So far, diamond has never been found included in other kimberlitic or xenolithic minerals. We have found a diamond inclusion inside the kimberlitic olivine grain, which is the first find of its kind. The diamond crystal is to have been captured by the growing olivine at quite high temperatures (more than 1400 °C) early in the history of the cratonic lithospheric mantle formation. The event had taken place long before the depleted peridotite cooled down to the temperature of the Middle Archean cratonic geotherm corresponding to the diamond stability field at depths where carbonatite melts can react with depleted peridotite, making it a diamond-bearing rock. On the one hand, this find provides evidence that diamonds can crystallize from the high-temperature silicate melt with some carbonate component. On the other hand, the diamond was found coexisting with a sulfide inclusion in the same olivine, i.e., crystallization from a sulfide melt may be another way of diamond formation.https://www.mdpi.com/2075-163X/13/1/36diamondolivinesulfidelithospheric mantlediamond-forming mediaMiddle Archean cratonic geotherm |
| spellingShingle | Lyudmila Pokhilenko Nikolay Pokhilenko Vladimir Malkovets Taisia Alifirova The Earliest Generation of Diamond: The First Find of a Diamond Inclusion in Kimberlitic Olivine Minerals diamond olivine sulfide lithospheric mantle diamond-forming media Middle Archean cratonic geotherm |
| title | The Earliest Generation of Diamond: The First Find of a Diamond Inclusion in Kimberlitic Olivine |
| title_full | The Earliest Generation of Diamond: The First Find of a Diamond Inclusion in Kimberlitic Olivine |
| title_fullStr | The Earliest Generation of Diamond: The First Find of a Diamond Inclusion in Kimberlitic Olivine |
| title_full_unstemmed | The Earliest Generation of Diamond: The First Find of a Diamond Inclusion in Kimberlitic Olivine |
| title_short | The Earliest Generation of Diamond: The First Find of a Diamond Inclusion in Kimberlitic Olivine |
| title_sort | earliest generation of diamond the first find of a diamond inclusion in kimberlitic olivine |
| topic | diamond olivine sulfide lithospheric mantle diamond-forming media Middle Archean cratonic geotherm |
| url | https://www.mdpi.com/2075-163X/13/1/36 |
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