Magma–Shale Interaction in Large Igneous Provinces: Implications for Climate Warming and Sulfide Genesis
Abstract Large igneous provinces (LIPs) whose magma plumbing systems intersect sedimentary basins are linked to upheavals of Earth’s carbon and sulfur cycles and thus climate and life history. However, the underlying mechanistic links between these phenomena are elusive. We address this knowledge ga...
Published in: | Journal of Petrology |
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Oxford University Press (OUP)
2022
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Online Access: | http://dx.doi.org/10.1093/petrology/egac094 https://academic.oup.com/petrology/advance-article-pdf/doi/10.1093/petrology/egac094/45748923/egac094.pdf https://academic.oup.com/petrology/article-pdf/63/9/egac094/51333588/egac094.pdf |
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croxfordunivpr:10.1093/petrology/egac094 2024-09-09T19:25:25+00:00 Magma–Shale Interaction in Large Igneous Provinces: Implications for Climate Warming and Sulfide Genesis Deegan, Frances M Bédard, Jean H Grasby, Stephen E Dewing, Keith Geiger, Harri Misiti, Valeria Capriolo, Manfredo Callegaro, Sara Svensen, Henrik H Yakymchuk, Chris Aradi, László E Freda, Carmela Troll, Valentin R 2022 http://dx.doi.org/10.1093/petrology/egac094 https://academic.oup.com/petrology/advance-article-pdf/doi/10.1093/petrology/egac094/45748923/egac094.pdf https://academic.oup.com/petrology/article-pdf/63/9/egac094/51333588/egac094.pdf en eng Oxford University Press (OUP) https://academic.oup.com/journals/pages/open_access/funder_policies/chorus/standard_publication_model Journal of Petrology volume 63, issue 9 ISSN 0022-3530 1460-2415 journal-article 2022 croxfordunivpr https://doi.org/10.1093/petrology/egac094 2024-07-29T04:19:59Z Abstract Large igneous provinces (LIPs) whose magma plumbing systems intersect sedimentary basins are linked to upheavals of Earth’s carbon and sulfur cycles and thus climate and life history. However, the underlying mechanistic links between these phenomena are elusive. We address this knowledge gap through short time-scale petrological experiments (1200°C and 150 MPa) that explore interaction between basaltic melt and carbonaceous shale (mudstone) using starting materials from the Canadian High Arctic LIP and the Sverdrup Basin in which it intrudes. Here we show that entrainment of shale xenoliths in basaltic melt causes shale to shatter due to incipient thermal stress and devolatilization, which accelerates assimilation by increasing reactive surface area. Shale assimilation therefore facilitates transfer of sediment-derived volatile elements to LIP magma plumbing systems, whereupon carbon dominates the vapor phase while sulfur is partitioned into sulfide melt droplets. This study reveals that although carbon and sulfur are efficiently mobilized as a consequence of shale assimilation, sulfides can sequester sulfur—an important climate cooling agent—thus enhancing net emissions of climate warming greenhouse gases by shale-intersecting LIPs. Article in Journal/Newspaper Arctic sverdrup basin Oxford University Press Arctic Journal of Petrology 63 9 |
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Open Polar |
collection |
Oxford University Press |
op_collection_id |
croxfordunivpr |
language |
English |
description |
Abstract Large igneous provinces (LIPs) whose magma plumbing systems intersect sedimentary basins are linked to upheavals of Earth’s carbon and sulfur cycles and thus climate and life history. However, the underlying mechanistic links between these phenomena are elusive. We address this knowledge gap through short time-scale petrological experiments (1200°C and 150 MPa) that explore interaction between basaltic melt and carbonaceous shale (mudstone) using starting materials from the Canadian High Arctic LIP and the Sverdrup Basin in which it intrudes. Here we show that entrainment of shale xenoliths in basaltic melt causes shale to shatter due to incipient thermal stress and devolatilization, which accelerates assimilation by increasing reactive surface area. Shale assimilation therefore facilitates transfer of sediment-derived volatile elements to LIP magma plumbing systems, whereupon carbon dominates the vapor phase while sulfur is partitioned into sulfide melt droplets. This study reveals that although carbon and sulfur are efficiently mobilized as a consequence of shale assimilation, sulfides can sequester sulfur—an important climate cooling agent—thus enhancing net emissions of climate warming greenhouse gases by shale-intersecting LIPs. |
format |
Article in Journal/Newspaper |
author |
Deegan, Frances M Bédard, Jean H Grasby, Stephen E Dewing, Keith Geiger, Harri Misiti, Valeria Capriolo, Manfredo Callegaro, Sara Svensen, Henrik H Yakymchuk, Chris Aradi, László E Freda, Carmela Troll, Valentin R |
spellingShingle |
Deegan, Frances M Bédard, Jean H Grasby, Stephen E Dewing, Keith Geiger, Harri Misiti, Valeria Capriolo, Manfredo Callegaro, Sara Svensen, Henrik H Yakymchuk, Chris Aradi, László E Freda, Carmela Troll, Valentin R Magma–Shale Interaction in Large Igneous Provinces: Implications for Climate Warming and Sulfide Genesis |
author_facet |
Deegan, Frances M Bédard, Jean H Grasby, Stephen E Dewing, Keith Geiger, Harri Misiti, Valeria Capriolo, Manfredo Callegaro, Sara Svensen, Henrik H Yakymchuk, Chris Aradi, László E Freda, Carmela Troll, Valentin R |
author_sort |
Deegan, Frances M |
title |
Magma–Shale Interaction in Large Igneous Provinces: Implications for Climate Warming and Sulfide Genesis |
title_short |
Magma–Shale Interaction in Large Igneous Provinces: Implications for Climate Warming and Sulfide Genesis |
title_full |
Magma–Shale Interaction in Large Igneous Provinces: Implications for Climate Warming and Sulfide Genesis |
title_fullStr |
Magma–Shale Interaction in Large Igneous Provinces: Implications for Climate Warming and Sulfide Genesis |
title_full_unstemmed |
Magma–Shale Interaction in Large Igneous Provinces: Implications for Climate Warming and Sulfide Genesis |
title_sort |
magma–shale interaction in large igneous provinces: implications for climate warming and sulfide genesis |
publisher |
Oxford University Press (OUP) |
publishDate |
2022 |
url |
http://dx.doi.org/10.1093/petrology/egac094 https://academic.oup.com/petrology/advance-article-pdf/doi/10.1093/petrology/egac094/45748923/egac094.pdf https://academic.oup.com/petrology/article-pdf/63/9/egac094/51333588/egac094.pdf |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic sverdrup basin |
genre_facet |
Arctic sverdrup basin |
op_source |
Journal of Petrology volume 63, issue 9 ISSN 0022-3530 1460-2415 |
op_rights |
https://academic.oup.com/journals/pages/open_access/funder_policies/chorus/standard_publication_model |
op_doi |
https://doi.org/10.1093/petrology/egac094 |
container_title |
Journal of Petrology |
container_volume |
63 |
container_issue |
9 |
_version_ |
1809895216225714176 |