Oceanic and super-deep continental diamonds share a transition zone origin and mantle plume transportation
Rare oceanic diamonds are believed to have a mantle transition zone origin like super-deep continental diamonds. However, oceanic diamonds have a homogeneous and organic-like light carbon isotope signature (δ13C − 28 to − 20‰) instead of the extremely variable organic to lithospheric mantle signatur...
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| Format: | Journal Article |
| Language: | English |
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NATURE PORTFOLIO
2021
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| Subjects: | |
| Online Access: | http://purl.org/au-research/grants/arc/FL150100133 http://hdl.handle.net/20.500.11937/90605 |
| _version_ | 1848765400430411776 |
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| author | Doucet, Luc Li, Zheng-Xiang Gamal El Dien, Hamed |
| author_facet | Doucet, Luc Li, Zheng-Xiang Gamal El Dien, Hamed |
| author_sort | Doucet, Luc |
| building | Curtin Institutional Repository |
| collection | Online Access |
| description | Rare oceanic diamonds are believed to have a mantle transition zone origin like super-deep continental diamonds. However, oceanic diamonds have a homogeneous and organic-like light carbon isotope signature (δ13C − 28 to − 20‰) instead of the extremely variable organic to lithospheric mantle signature of super-deep continental diamonds (δ13C − 25‰ to + 3.5‰). Here, we show that with rare exceptions, oceanic diamonds and the isotopically lighter cores of super-deep continental diamonds share a common organic δ13C composition reflecting carbon brought down to the transition zone by subduction, whereas the rims of such super-deep continental diamonds have the same δ13C as peridotitic diamonds from the lithospheric mantle. Like lithospheric continental diamonds, almost all the known occurrences of oceanic diamonds are linked to plume-induced large igneous provinces or ocean islands, suggesting a common connection to mantle plumes. We argue that mantle plumes bring the transition zone diamonds to shallower levels, where only those emplaced at the base of the continental lithosphere might grow rims with lithospheric mantle carbon isotope signatures. |
| first_indexed | 2025-11-14T11:34:39Z |
| format | Journal Article |
| id | curtin-20.500.11937-90605 |
| institution | Curtin University Malaysia |
| institution_category | Local University |
| language | English |
| last_indexed | 2025-11-14T11:34:39Z |
| publishDate | 2021 |
| publisher | NATURE PORTFOLIO |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | curtin-20.500.11937-906052023-03-27T01:18:00Z Oceanic and super-deep continental diamonds share a transition zone origin and mantle plume transportation Doucet, Luc Li, Zheng-Xiang Gamal El Dien, Hamed Science & Technology Multidisciplinary Sciences Science & Technology - Other Topics ULTRA-DEEP DIAMONDS RAY-IZ OPHIOLITE SLAVE CRATON LITHOSPHERIC MANTLE MINERAL INCLUSIONS TECTONIC EVOLUTION LUOBUSA OPHIOLITE FLUID SPECIATION HOSTED DIAMONDS CARBON ISOTOPES Rare oceanic diamonds are believed to have a mantle transition zone origin like super-deep continental diamonds. However, oceanic diamonds have a homogeneous and organic-like light carbon isotope signature (δ13C − 28 to − 20‰) instead of the extremely variable organic to lithospheric mantle signature of super-deep continental diamonds (δ13C − 25‰ to + 3.5‰). Here, we show that with rare exceptions, oceanic diamonds and the isotopically lighter cores of super-deep continental diamonds share a common organic δ13C composition reflecting carbon brought down to the transition zone by subduction, whereas the rims of such super-deep continental diamonds have the same δ13C as peridotitic diamonds from the lithospheric mantle. Like lithospheric continental diamonds, almost all the known occurrences of oceanic diamonds are linked to plume-induced large igneous provinces or ocean islands, suggesting a common connection to mantle plumes. We argue that mantle plumes bring the transition zone diamonds to shallower levels, where only those emplaced at the base of the continental lithosphere might grow rims with lithospheric mantle carbon isotope signatures. 2021 Journal Article http://hdl.handle.net/20.500.11937/90605 10.1038/s41598-021-96286-8 English http://purl.org/au-research/grants/arc/FL150100133 http://creativecommons.org/licenses/by/4.0/ NATURE PORTFOLIO fulltext |
| spellingShingle | Science & Technology Multidisciplinary Sciences Science & Technology - Other Topics ULTRA-DEEP DIAMONDS RAY-IZ OPHIOLITE SLAVE CRATON LITHOSPHERIC MANTLE MINERAL INCLUSIONS TECTONIC EVOLUTION LUOBUSA OPHIOLITE FLUID SPECIATION HOSTED DIAMONDS CARBON ISOTOPES Doucet, Luc Li, Zheng-Xiang Gamal El Dien, Hamed Oceanic and super-deep continental diamonds share a transition zone origin and mantle plume transportation |
| title | Oceanic and super-deep continental diamonds share a transition zone origin and mantle plume transportation |
| title_full | Oceanic and super-deep continental diamonds share a transition zone origin and mantle plume transportation |
| title_fullStr | Oceanic and super-deep continental diamonds share a transition zone origin and mantle plume transportation |
| title_full_unstemmed | Oceanic and super-deep continental diamonds share a transition zone origin and mantle plume transportation |
| title_short | Oceanic and super-deep continental diamonds share a transition zone origin and mantle plume transportation |
| title_sort | oceanic and super-deep continental diamonds share a transition zone origin and mantle plume transportation |
| topic | Science & Technology Multidisciplinary Sciences Science & Technology - Other Topics ULTRA-DEEP DIAMONDS RAY-IZ OPHIOLITE SLAVE CRATON LITHOSPHERIC MANTLE MINERAL INCLUSIONS TECTONIC EVOLUTION LUOBUSA OPHIOLITE FLUID SPECIATION HOSTED DIAMONDS CARBON ISOTOPES |
| url | http://purl.org/au-research/grants/arc/FL150100133 http://hdl.handle.net/20.500.11937/90605 |