Mantle response to ridge re-organization ...
The local preservation of depleted Nd-Hf and Os isotopic compositions in abyssal peridotites contrasts with the lack of such extreme isotopic signatures in erupted MORB [1]. This is likely a consequence of different preservation potentials of melts from enriched and depleted portions of mantle [2]....
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Deutsche Geologische Gesellschaft - Geologische Vereinigung e.V. (DGGV)
2022
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Online Access: | https://dx.doi.org/10.48380/xp90-ay88 https://www.dggv.de/e-publikationen/mantle-response-to-ridge-re-organization |
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ftdatacite:10.48380/xp90-ay88 2023-11-05T03:39:36+01:00 Mantle response to ridge re-organization ... Sanfilippo, Alessio 2022 https://dx.doi.org/10.48380/xp90-ay88 https://www.dggv.de/e-publikationen/mantle-response-to-ridge-re-organization en eng Deutsche Geologische Gesellschaft - Geologische Vereinigung e.V. (DGGV) article-journal Text Abstract ScholaryArticle 2022 ftdatacite https://doi.org/10.48380/xp90-ay88 2023-10-09T11:00:05Z The local preservation of depleted Nd-Hf and Os isotopic compositions in abyssal peridotites contrasts with the lack of such extreme isotopic signatures in erupted MORB [1]. This is likely a consequence of different preservation potentials of melts from enriched and depleted portions of mantle [2]. Indeed, fertile and geochemically enriched components produce melts hosting the majority of incompatible elements, concealing the chemical fingerprint of the depleted counterparts [3]. However, Mid Ocean Ridges are dynamic environments, where geodynamic responses to far field forces may cause change in ridge-geometry and/or re-organization of the ridge axis. This contribution discusses how this process affects melting regimes, reducing the effect of mixing [5,6]. I will consider study cases from large-offset oceanic transforms from the Mid Atlantic Ridge (Doldrums and Charlie Gibbs Fracture Zones), and from the highly asymmetric Knipovich Ridge, in the Arctic Ocean. Variations in chemistry of basalt and associated ... Text Arctic Arctic Ocean DataCite Metadata Store (German National Library of Science and Technology) |
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DataCite Metadata Store (German National Library of Science and Technology) |
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English |
description |
The local preservation of depleted Nd-Hf and Os isotopic compositions in abyssal peridotites contrasts with the lack of such extreme isotopic signatures in erupted MORB [1]. This is likely a consequence of different preservation potentials of melts from enriched and depleted portions of mantle [2]. Indeed, fertile and geochemically enriched components produce melts hosting the majority of incompatible elements, concealing the chemical fingerprint of the depleted counterparts [3]. However, Mid Ocean Ridges are dynamic environments, where geodynamic responses to far field forces may cause change in ridge-geometry and/or re-organization of the ridge axis. This contribution discusses how this process affects melting regimes, reducing the effect of mixing [5,6]. I will consider study cases from large-offset oceanic transforms from the Mid Atlantic Ridge (Doldrums and Charlie Gibbs Fracture Zones), and from the highly asymmetric Knipovich Ridge, in the Arctic Ocean. Variations in chemistry of basalt and associated ... |
format |
Text |
author |
Sanfilippo, Alessio |
spellingShingle |
Sanfilippo, Alessio Mantle response to ridge re-organization ... |
author_facet |
Sanfilippo, Alessio |
author_sort |
Sanfilippo, Alessio |
title |
Mantle response to ridge re-organization ... |
title_short |
Mantle response to ridge re-organization ... |
title_full |
Mantle response to ridge re-organization ... |
title_fullStr |
Mantle response to ridge re-organization ... |
title_full_unstemmed |
Mantle response to ridge re-organization ... |
title_sort |
mantle response to ridge re-organization ... |
publisher |
Deutsche Geologische Gesellschaft - Geologische Vereinigung e.V. (DGGV) |
publishDate |
2022 |
url |
https://dx.doi.org/10.48380/xp90-ay88 https://www.dggv.de/e-publikationen/mantle-response-to-ridge-re-organization |
genre |
Arctic Arctic Ocean |
genre_facet |
Arctic Arctic Ocean |
op_doi |
https://doi.org/10.48380/xp90-ay88 |
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1781695473448386560 |