Diamondiferous Paleoproterozoic mantle roots beneath Arctic Canada: A study of mantle xenoliths from Parry Peninsula and Central Victoria Island
While the mantle roots directly beneath Archean cratons have been relatively well studied because of their economic importance, much less is known about the genesis, age, composition and thickness of the mantle lithosphere beneath the regions that surround the cratons. Despite this knowledge gap, it...
Published in: | Geochimica et Cosmochimica Acta |
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Format: | Article in Journal/Newspaper |
Language: | English |
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Elsevier
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Online Access: | https://oceanrep.geomar.de/id/eprint/44131/ https://oceanrep.geomar.de/id/eprint/44131/1/Liu.pdf https://doi.org/10.1016/j.gca.2018.08.010 |
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ftoceanrep:oai:oceanrep.geomar.de:44131 2023-05-15T14:27:13+02:00 Diamondiferous Paleoproterozoic mantle roots beneath Arctic Canada: A study of mantle xenoliths from Parry Peninsula and Central Victoria Island Liu, Jingao Brin, Laura E. Graham Pearson, D. Bretschneider, Lisa Luguet, Ambre van Acken, David Kjarsgaard, Bruce Riches, Amy Miskovic, Aleksandar 2018-10-15 text https://oceanrep.geomar.de/id/eprint/44131/ https://oceanrep.geomar.de/id/eprint/44131/1/Liu.pdf https://doi.org/10.1016/j.gca.2018.08.010 en eng Elsevier https://oceanrep.geomar.de/id/eprint/44131/1/Liu.pdf Liu, J., Brin, L. E., Graham Pearson, D., Bretschneider, L. , Luguet, A., van Acken, D., Kjarsgaard, B., Riches, A. and Miskovic, A. (2018) Diamondiferous Paleoproterozoic mantle roots beneath Arctic Canada: A study of mantle xenoliths from Parry Peninsula and Central Victoria Island. Geochimica et Cosmochimica Acta, 239 . pp. 284-311. DOI 10.1016/j.gca.2018.08.010 <https://doi.org/10.1016/j.gca.2018.08.010>. doi:10.1016/j.gca.2018.08.010 info:eu-repo/semantics/restrictedAccess Article PeerReviewed 2018 ftoceanrep https://doi.org/10.1016/j.gca.2018.08.010 2023-04-07T15:41:01Z While the mantle roots directly beneath Archean cratons have been relatively well studied because of their economic importance, much less is known about the genesis, age, composition and thickness of the mantle lithosphere beneath the regions that surround the cratons. Despite this knowledge gap, it is fundamentally important to establish the nature of relationships between this circum-cratonic mantle and that beneath the cratons, including the diamond potential of circum-cratonic regions. Here we present mineral and bulk elemental and isotopic compositions for kimberlite-borne mantle xenoliths from the Parry Peninsula and Central Victoria Island, Arctic Canada. These xenoliths provide key windows into the lithospheric mantle underpinning regions to the North and Northwest of the Archean Slave craton, where the presence of cratonic material has been proposed. The mantle xenolith data are supplemented by mineral concentrate data obtained during diamond exploration. The mineral and whole rock chemistry of peridotites from both localities is indistinguishable from that of typical cratonic mantle lithosphere. The cool mantle paleogeotherms defined by mineral thermobarometry reveal that the lithospheric mantle beneath the Parry Peninsula and Central Victoria Island terranes extended well into the diamond stability field at the time of kimberlite eruption, and this is consistent with the recovery of diamonds from both kimberlite fields. Bulk xenolith Se and Te contents, and highly siderophile element (including Os, Ir, Pt, Pd and Re) abundance systematics, plus corresponding depletion ages derived from Re-Os isotope data suggest that the mantle beneath these parts of Arctic Canada formed in the Paleoproterozoic Era, at ∼2 Ga, rather than in the Archean. The presence of a diamondiferous Paleoproterozoic mantle root is part of the growing body of global evidence for diamond generation in mantle roots that stabilized well after the Archean. In the context of regional tectonics, we interpret the highly depleted mantle ... Article in Journal/Newspaper Arctic Arctic Parry Peninsula Victoria Island victoria island OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel) Arctic Canada Parry ENVELOPE(-62.417,-62.417,-64.283,-64.283) Parry Peninsula ENVELOPE(-30.000,-30.000,-79.500,-79.500) Geochimica et Cosmochimica Acta 239 284 311 |
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Open Polar |
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OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel) |
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ftoceanrep |
language |
English |
description |
While the mantle roots directly beneath Archean cratons have been relatively well studied because of their economic importance, much less is known about the genesis, age, composition and thickness of the mantle lithosphere beneath the regions that surround the cratons. Despite this knowledge gap, it is fundamentally important to establish the nature of relationships between this circum-cratonic mantle and that beneath the cratons, including the diamond potential of circum-cratonic regions. Here we present mineral and bulk elemental and isotopic compositions for kimberlite-borne mantle xenoliths from the Parry Peninsula and Central Victoria Island, Arctic Canada. These xenoliths provide key windows into the lithospheric mantle underpinning regions to the North and Northwest of the Archean Slave craton, where the presence of cratonic material has been proposed. The mantle xenolith data are supplemented by mineral concentrate data obtained during diamond exploration. The mineral and whole rock chemistry of peridotites from both localities is indistinguishable from that of typical cratonic mantle lithosphere. The cool mantle paleogeotherms defined by mineral thermobarometry reveal that the lithospheric mantle beneath the Parry Peninsula and Central Victoria Island terranes extended well into the diamond stability field at the time of kimberlite eruption, and this is consistent with the recovery of diamonds from both kimberlite fields. Bulk xenolith Se and Te contents, and highly siderophile element (including Os, Ir, Pt, Pd and Re) abundance systematics, plus corresponding depletion ages derived from Re-Os isotope data suggest that the mantle beneath these parts of Arctic Canada formed in the Paleoproterozoic Era, at ∼2 Ga, rather than in the Archean. The presence of a diamondiferous Paleoproterozoic mantle root is part of the growing body of global evidence for diamond generation in mantle roots that stabilized well after the Archean. In the context of regional tectonics, we interpret the highly depleted mantle ... |
format |
Article in Journal/Newspaper |
author |
Liu, Jingao Brin, Laura E. Graham Pearson, D. Bretschneider, Lisa Luguet, Ambre van Acken, David Kjarsgaard, Bruce Riches, Amy Miskovic, Aleksandar |
spellingShingle |
Liu, Jingao Brin, Laura E. Graham Pearson, D. Bretschneider, Lisa Luguet, Ambre van Acken, David Kjarsgaard, Bruce Riches, Amy Miskovic, Aleksandar Diamondiferous Paleoproterozoic mantle roots beneath Arctic Canada: A study of mantle xenoliths from Parry Peninsula and Central Victoria Island |
author_facet |
Liu, Jingao Brin, Laura E. Graham Pearson, D. Bretschneider, Lisa Luguet, Ambre van Acken, David Kjarsgaard, Bruce Riches, Amy Miskovic, Aleksandar |
author_sort |
Liu, Jingao |
title |
Diamondiferous Paleoproterozoic mantle roots beneath Arctic Canada: A study of mantle xenoliths from Parry Peninsula and Central Victoria Island |
title_short |
Diamondiferous Paleoproterozoic mantle roots beneath Arctic Canada: A study of mantle xenoliths from Parry Peninsula and Central Victoria Island |
title_full |
Diamondiferous Paleoproterozoic mantle roots beneath Arctic Canada: A study of mantle xenoliths from Parry Peninsula and Central Victoria Island |
title_fullStr |
Diamondiferous Paleoproterozoic mantle roots beneath Arctic Canada: A study of mantle xenoliths from Parry Peninsula and Central Victoria Island |
title_full_unstemmed |
Diamondiferous Paleoproterozoic mantle roots beneath Arctic Canada: A study of mantle xenoliths from Parry Peninsula and Central Victoria Island |
title_sort |
diamondiferous paleoproterozoic mantle roots beneath arctic canada: a study of mantle xenoliths from parry peninsula and central victoria island |
publisher |
Elsevier |
publishDate |
2018 |
url |
https://oceanrep.geomar.de/id/eprint/44131/ https://oceanrep.geomar.de/id/eprint/44131/1/Liu.pdf https://doi.org/10.1016/j.gca.2018.08.010 |
long_lat |
ENVELOPE(-62.417,-62.417,-64.283,-64.283) ENVELOPE(-30.000,-30.000,-79.500,-79.500) |
geographic |
Arctic Canada Parry Parry Peninsula |
geographic_facet |
Arctic Canada Parry Parry Peninsula |
genre |
Arctic Arctic Parry Peninsula Victoria Island victoria island |
genre_facet |
Arctic Arctic Parry Peninsula Victoria Island victoria island |
op_relation |
https://oceanrep.geomar.de/id/eprint/44131/1/Liu.pdf Liu, J., Brin, L. E., Graham Pearson, D., Bretschneider, L. , Luguet, A., van Acken, D., Kjarsgaard, B., Riches, A. and Miskovic, A. (2018) Diamondiferous Paleoproterozoic mantle roots beneath Arctic Canada: A study of mantle xenoliths from Parry Peninsula and Central Victoria Island. Geochimica et Cosmochimica Acta, 239 . pp. 284-311. DOI 10.1016/j.gca.2018.08.010 <https://doi.org/10.1016/j.gca.2018.08.010>. doi:10.1016/j.gca.2018.08.010 |
op_rights |
info:eu-repo/semantics/restrictedAccess |
op_doi |
https://doi.org/10.1016/j.gca.2018.08.010 |
container_title |
Geochimica et Cosmochimica Acta |
container_volume |
239 |
container_start_page |
284 |
op_container_end_page |
311 |
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1766300845969768448 |