CO2 storage in the Antarctica Sub-Continental Lithospheric Mantle as revealed by intra- and inter-granular fluids
The investigation of the role played by CO2 circulating within the mantle during partial melting and metasomatic/refertilization processes, together with a re-consideration of its storage capability and re-cycling in the lithospheric mantle, is crucial to unravel the Earth’s main geodynamic processe...
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Online Access: | https://hdl.handle.net/11392/2478320 https://doi.org/10.1016/j.lithos.2022.106643 https://www.sciencedirect.com/science/article/pii/S0024493722000524 |
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ftunivferrarair:oai:iris.unife.it:11392/2478320 2024-02-11T09:57:27+01:00 CO2 storage in the Antarctica Sub-Continental Lithospheric Mantle as revealed by intra- and inter-granular fluids Casetta, Federico Rizzo, Andrea L. Faccini, Barbara Ntaflos, Theodoros Abart, Rainer Lanzafame, Gabriele Faccincani, Luca Mancini, Lucia Giacomoni, Pier Paolo Coltorti, Massimo Casetta, Federico Rizzo, Andrea L. Faccini, Barbara Ntaflos, Theodoro Abart, Rainer Lanzafame, Gabriele Faccincani, Luca Mancini, Lucia Giacomoni, Pier Paolo Coltorti, Massimo 2022 STAMPA https://hdl.handle.net/11392/2478320 https://doi.org/10.1016/j.lithos.2022.106643 https://www.sciencedirect.com/science/article/pii/S0024493722000524 eng eng info:eu-repo/semantics/altIdentifier/wos/WOS:000799244600002 volume:416-417 firstpage:106643-1 lastpage:106643-20 numberofpages:20 journal:LITHOS https://hdl.handle.net/11392/2478320 doi:10.1016/j.lithos.2022.106643 info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-85125537498 https://www.sciencedirect.com/science/article/pii/S0024493722000524 info:eu-repo/semantics/openAccess Alkaline metasomatism CO2 storage Fluid inclusion Inter-granular fluid Sub-Continental Lithospheric Mantle Synchrotron X-ray microtomography info:eu-repo/semantics/article 2022 ftunivferrarair https://doi.org/10.1016/j.lithos.2022.106643 2024-01-17T17:41:37Z The investigation of the role played by CO2 circulating within the mantle during partial melting and metasomatic/refertilization processes, together with a re-consideration of its storage capability and re-cycling in the lithospheric mantle, is crucial to unravel the Earth’s main geodynamic processes. In this study, the combination of petrology, CO2 content trapped in bulk rock- and mineral-hosted fluid inclusions (FI), and 3D textural and volumetric characterization of intra- and inter-granular microstructures was used to investigate the extent and modality of CO2 storage in depleted and fertile (or refertilized) Sub-Continental Lithospheric Mantle (SCLM) beneath northern Victoria Land (NVL, Antarctica). Prior to xenoliths entrainment by the host basalt, the Antarctic SCLM may have stored 0.2 vol.% melt and 1.1 vol.% fluids, mostly as FI trails inside mineral phases but also as inter-granular fluids. The amount of CO2 stored in FI varies from 0.1 µg(CO2)/g(sample) in olivine from the anhydrous mantle xenoliths at Greene Point and Handler Ridge, up to 187.3 µg/g in orthopyroxene from the highly metasomatized amphibole-bearing lherzolites at Baker Rocks, while the corresponding bulk CO2 contents range from 0.3 to 57.2 µg/g. Irrespective of the lithology, CO2 partitioning is favoured in orthopyroxene and clinopyroxene-hosted FI (olivine: orthopyroxene = 0.10±0.06 to 0.26±0.09; olivine: clinopyroxene = 0.10±0.05 to 0.27±0.14). The H2O/(H2O+CO2) molar ratios obtained by comparing the CO2 contents of FI to the H2O amount retained in pyroxene lattices vary between 0.72±0.17 and 0.97±0.03, which is well comparable with the values measured in olivine-hosted melt inclusions from Antarctic primary lavas and assumed as representative of the partition of volatiles at the local mantle conditions. From the relationships between mineral chemistry, thermo-, oxy-barometric results and CO2 contents in mantle xenoliths, we speculate that relicts of CO2-depleted mantle are present at Greene Point, representing memory of a CO2-poor ... Article in Journal/Newspaper Antarc* Antarctic Antarctica Victoria Land Università degli Studi di Ferrara: CINECA IRIS Antarctic Baker Rocks ENVELOPE(164.750,164.750,-74.233,-74.233) Greene ENVELOPE(168.233,168.233,-72.100,-72.100) Greene Point ENVELOPE(166.150,166.150,-73.817,-73.817) Handler Ridge ENVELOPE(167.000,167.000,-72.500,-72.500) The Antarctic Victoria Land Lithos 416-417 106643 |
institution |
Open Polar |
collection |
Università degli Studi di Ferrara: CINECA IRIS |
op_collection_id |
ftunivferrarair |
language |
English |
topic |
Alkaline metasomatism CO2 storage Fluid inclusion Inter-granular fluid Sub-Continental Lithospheric Mantle Synchrotron X-ray microtomography |
spellingShingle |
Alkaline metasomatism CO2 storage Fluid inclusion Inter-granular fluid Sub-Continental Lithospheric Mantle Synchrotron X-ray microtomography Casetta, Federico Rizzo, Andrea L. Faccini, Barbara Ntaflos, Theodoros Abart, Rainer Lanzafame, Gabriele Faccincani, Luca Mancini, Lucia Giacomoni, Pier Paolo Coltorti, Massimo CO2 storage in the Antarctica Sub-Continental Lithospheric Mantle as revealed by intra- and inter-granular fluids |
topic_facet |
Alkaline metasomatism CO2 storage Fluid inclusion Inter-granular fluid Sub-Continental Lithospheric Mantle Synchrotron X-ray microtomography |
description |
The investigation of the role played by CO2 circulating within the mantle during partial melting and metasomatic/refertilization processes, together with a re-consideration of its storage capability and re-cycling in the lithospheric mantle, is crucial to unravel the Earth’s main geodynamic processes. In this study, the combination of petrology, CO2 content trapped in bulk rock- and mineral-hosted fluid inclusions (FI), and 3D textural and volumetric characterization of intra- and inter-granular microstructures was used to investigate the extent and modality of CO2 storage in depleted and fertile (or refertilized) Sub-Continental Lithospheric Mantle (SCLM) beneath northern Victoria Land (NVL, Antarctica). Prior to xenoliths entrainment by the host basalt, the Antarctic SCLM may have stored 0.2 vol.% melt and 1.1 vol.% fluids, mostly as FI trails inside mineral phases but also as inter-granular fluids. The amount of CO2 stored in FI varies from 0.1 µg(CO2)/g(sample) in olivine from the anhydrous mantle xenoliths at Greene Point and Handler Ridge, up to 187.3 µg/g in orthopyroxene from the highly metasomatized amphibole-bearing lherzolites at Baker Rocks, while the corresponding bulk CO2 contents range from 0.3 to 57.2 µg/g. Irrespective of the lithology, CO2 partitioning is favoured in orthopyroxene and clinopyroxene-hosted FI (olivine: orthopyroxene = 0.10±0.06 to 0.26±0.09; olivine: clinopyroxene = 0.10±0.05 to 0.27±0.14). The H2O/(H2O+CO2) molar ratios obtained by comparing the CO2 contents of FI to the H2O amount retained in pyroxene lattices vary between 0.72±0.17 and 0.97±0.03, which is well comparable with the values measured in olivine-hosted melt inclusions from Antarctic primary lavas and assumed as representative of the partition of volatiles at the local mantle conditions. From the relationships between mineral chemistry, thermo-, oxy-barometric results and CO2 contents in mantle xenoliths, we speculate that relicts of CO2-depleted mantle are present at Greene Point, representing memory of a CO2-poor ... |
author2 |
Casetta, Federico Rizzo, Andrea L. Faccini, Barbara Ntaflos, Theodoro Abart, Rainer Lanzafame, Gabriele Faccincani, Luca Mancini, Lucia Giacomoni, Pier Paolo Coltorti, Massimo |
format |
Article in Journal/Newspaper |
author |
Casetta, Federico Rizzo, Andrea L. Faccini, Barbara Ntaflos, Theodoros Abart, Rainer Lanzafame, Gabriele Faccincani, Luca Mancini, Lucia Giacomoni, Pier Paolo Coltorti, Massimo |
author_facet |
Casetta, Federico Rizzo, Andrea L. Faccini, Barbara Ntaflos, Theodoros Abart, Rainer Lanzafame, Gabriele Faccincani, Luca Mancini, Lucia Giacomoni, Pier Paolo Coltorti, Massimo |
author_sort |
Casetta, Federico |
title |
CO2 storage in the Antarctica Sub-Continental Lithospheric Mantle as revealed by intra- and inter-granular fluids |
title_short |
CO2 storage in the Antarctica Sub-Continental Lithospheric Mantle as revealed by intra- and inter-granular fluids |
title_full |
CO2 storage in the Antarctica Sub-Continental Lithospheric Mantle as revealed by intra- and inter-granular fluids |
title_fullStr |
CO2 storage in the Antarctica Sub-Continental Lithospheric Mantle as revealed by intra- and inter-granular fluids |
title_full_unstemmed |
CO2 storage in the Antarctica Sub-Continental Lithospheric Mantle as revealed by intra- and inter-granular fluids |
title_sort |
co2 storage in the antarctica sub-continental lithospheric mantle as revealed by intra- and inter-granular fluids |
publishDate |
2022 |
url |
https://hdl.handle.net/11392/2478320 https://doi.org/10.1016/j.lithos.2022.106643 https://www.sciencedirect.com/science/article/pii/S0024493722000524 |
long_lat |
ENVELOPE(164.750,164.750,-74.233,-74.233) ENVELOPE(168.233,168.233,-72.100,-72.100) ENVELOPE(166.150,166.150,-73.817,-73.817) ENVELOPE(167.000,167.000,-72.500,-72.500) |
geographic |
Antarctic Baker Rocks Greene Greene Point Handler Ridge The Antarctic Victoria Land |
geographic_facet |
Antarctic Baker Rocks Greene Greene Point Handler Ridge The Antarctic Victoria Land |
genre |
Antarc* Antarctic Antarctica Victoria Land |
genre_facet |
Antarc* Antarctic Antarctica Victoria Land |
op_relation |
info:eu-repo/semantics/altIdentifier/wos/WOS:000799244600002 volume:416-417 firstpage:106643-1 lastpage:106643-20 numberofpages:20 journal:LITHOS https://hdl.handle.net/11392/2478320 doi:10.1016/j.lithos.2022.106643 info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-85125537498 https://www.sciencedirect.com/science/article/pii/S0024493722000524 |
op_rights |
info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.1016/j.lithos.2022.106643 |
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Lithos |
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416-417 |
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106643 |
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1790609754878377984 |