Silicic magma petrogenesis in Iceland by remelting of hydrothermally altered crust based on oxygen isotope diversity and disequilibria between zircon and magma with implications for MORB
Terra Nova, 24, 227–232, 2012 Abstract Petrogenesis of silicic magmas in Iceland has fundamental significance for understanding the relative importance of fractional crystallization of mantle‐derived basalt and partial melting of hydrothermally altered basaltic crust in formation of the earliest con...
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crwiley:10.1111/j.1365-3121.2012.01058.x 2024-06-23T07:53:32+00:00 Silicic magma petrogenesis in Iceland by remelting of hydrothermally altered crust based on oxygen isotope diversity and disequilibria between zircon and magma with implications for MORB Bindeman, Ilya Gurenko, Andrey Carley, Tamara Miller, Calvin Martin, Erwan Sigmarsson, Olgeir 2012 http://dx.doi.org/10.1111/j.1365-3121.2012.01058.x https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fj.1365-3121.2012.01058.x https://onlinelibrary.wiley.com/doi/pdf/10.1111/j.1365-3121.2012.01058.x en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#vor Terra Nova volume 24, issue 3, page 227-232 ISSN 0954-4879 1365-3121 journal-article 2012 crwiley https://doi.org/10.1111/j.1365-3121.2012.01058.x 2024-06-13T04:22:59Z Terra Nova, 24, 227–232, 2012 Abstract Petrogenesis of silicic magmas in Iceland has fundamental significance for understanding the relative importance of fractional crystallization of mantle‐derived basalt and partial melting of hydrothermally altered basaltic crust in formation of the earliest continental crust. First results of in situ oxygen isotope investigation of zircons in large‐volume silicic eruptive products of three volcanoes in Iceland (Askja, Torfajökull, and Hekla) demonstrate isotope diversity and disequilibria and long U–Th zircon pre‐eruptive residence of 10 3 –10 4 year. This suggests that zircons did not grow from their host melts but instead were inherited from older magma batches and leftover cumulates with generally low and variable δ 18 O values. This study demonstrates that segregation of cubic kilometres of silicic magma is faster than mineral‐diffusive or recrystallization time‐scales (estimated at ∼10 3 years), and it suggests that partial melting of hydrothermally altered and oxidized oceanic crust is the mechanism that best explains silicic rocks in Iceland and early earth environments. Article in Journal/Newspaper Hekla Iceland Wiley Online Library Askja ENVELOPE(-16.802,-16.802,65.042,65.042) Torfajökull ENVELOPE(-19.027,-19.027,63.898,63.898) Terra Nova 24 3 227 232 |
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Wiley Online Library |
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crwiley |
language |
English |
description |
Terra Nova, 24, 227–232, 2012 Abstract Petrogenesis of silicic magmas in Iceland has fundamental significance for understanding the relative importance of fractional crystallization of mantle‐derived basalt and partial melting of hydrothermally altered basaltic crust in formation of the earliest continental crust. First results of in situ oxygen isotope investigation of zircons in large‐volume silicic eruptive products of three volcanoes in Iceland (Askja, Torfajökull, and Hekla) demonstrate isotope diversity and disequilibria and long U–Th zircon pre‐eruptive residence of 10 3 –10 4 year. This suggests that zircons did not grow from their host melts but instead were inherited from older magma batches and leftover cumulates with generally low and variable δ 18 O values. This study demonstrates that segregation of cubic kilometres of silicic magma is faster than mineral‐diffusive or recrystallization time‐scales (estimated at ∼10 3 years), and it suggests that partial melting of hydrothermally altered and oxidized oceanic crust is the mechanism that best explains silicic rocks in Iceland and early earth environments. |
format |
Article in Journal/Newspaper |
author |
Bindeman, Ilya Gurenko, Andrey Carley, Tamara Miller, Calvin Martin, Erwan Sigmarsson, Olgeir |
spellingShingle |
Bindeman, Ilya Gurenko, Andrey Carley, Tamara Miller, Calvin Martin, Erwan Sigmarsson, Olgeir Silicic magma petrogenesis in Iceland by remelting of hydrothermally altered crust based on oxygen isotope diversity and disequilibria between zircon and magma with implications for MORB |
author_facet |
Bindeman, Ilya Gurenko, Andrey Carley, Tamara Miller, Calvin Martin, Erwan Sigmarsson, Olgeir |
author_sort |
Bindeman, Ilya |
title |
Silicic magma petrogenesis in Iceland by remelting of hydrothermally altered crust based on oxygen isotope diversity and disequilibria between zircon and magma with implications for MORB |
title_short |
Silicic magma petrogenesis in Iceland by remelting of hydrothermally altered crust based on oxygen isotope diversity and disequilibria between zircon and magma with implications for MORB |
title_full |
Silicic magma petrogenesis in Iceland by remelting of hydrothermally altered crust based on oxygen isotope diversity and disequilibria between zircon and magma with implications for MORB |
title_fullStr |
Silicic magma petrogenesis in Iceland by remelting of hydrothermally altered crust based on oxygen isotope diversity and disequilibria between zircon and magma with implications for MORB |
title_full_unstemmed |
Silicic magma petrogenesis in Iceland by remelting of hydrothermally altered crust based on oxygen isotope diversity and disequilibria between zircon and magma with implications for MORB |
title_sort |
silicic magma petrogenesis in iceland by remelting of hydrothermally altered crust based on oxygen isotope diversity and disequilibria between zircon and magma with implications for morb |
publisher |
Wiley |
publishDate |
2012 |
url |
http://dx.doi.org/10.1111/j.1365-3121.2012.01058.x https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fj.1365-3121.2012.01058.x https://onlinelibrary.wiley.com/doi/pdf/10.1111/j.1365-3121.2012.01058.x |
long_lat |
ENVELOPE(-16.802,-16.802,65.042,65.042) ENVELOPE(-19.027,-19.027,63.898,63.898) |
geographic |
Askja Torfajökull |
geographic_facet |
Askja Torfajökull |
genre |
Hekla Iceland |
genre_facet |
Hekla Iceland |
op_source |
Terra Nova volume 24, issue 3, page 227-232 ISSN 0954-4879 1365-3121 |
op_rights |
http://onlinelibrary.wiley.com/termsAndConditions#vor |
op_doi |
https://doi.org/10.1111/j.1365-3121.2012.01058.x |
container_title |
Terra Nova |
container_volume |
24 |
container_issue |
3 |
container_start_page |
227 |
op_container_end_page |
232 |
_version_ |
1802645253552865280 |