Experimental study on a basanite from the McMurdo Volcanic Group, Antarctica: inference on its mantle source
Experiments to reconstruct the liquidus curve and establish the phase relationships of a basanite (Mg# = 72) from the McMurdo Volcanic Group, (thought to represent a nearly primary magma) used 1.0– 3.0 GPa and 1175–1550°C. The results suggest that this basanite could be generated by partial melting...
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crcambridgeupr:10.1017/s0954102000000134 2024-03-03T08:38:41+00:00 Experimental study on a basanite from the McMurdo Volcanic Group, Antarctica: inference on its mantle source Orlando, Andrea Conticelli, Sandro Armienti, Pietro Borrini, Daniele 2000 http://dx.doi.org/10.1017/s0954102000000134 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0954102000000134 en eng Cambridge University Press (CUP) https://www.cambridge.org/core/terms Antarctic Science volume 12, issue 1, page 105-116 ISSN 0954-1020 1365-2079 Geology Ecology, Evolution, Behavior and Systematics Oceanography journal-article 2000 crcambridgeupr https://doi.org/10.1017/s0954102000000134 2024-02-08T08:45:37Z Experiments to reconstruct the liquidus curve and establish the phase relationships of a basanite (Mg# = 72) from the McMurdo Volcanic Group, (thought to represent a nearly primary magma) used 1.0– 3.0 GPa and 1175–1550°C. The results suggest that this basanite could be generated by partial melting either of a spinel Iherzolite (at P = 1.5–2.0 GPa and T = 1390–1490°C) or of a garnet pyroxenite (at P > 3.0 GPa and T > 1550°C) source. Several lines of petrological and geochemical evidence support the latter hypothesis. Moreover, experimental results indicate the presence of mica in the source if it is assumed that the magma lost some water during its ascent to the surface. This is supported by the presence of mica and amphibole-bearing mantle xenoliths hosted in the most primitive volcanic rocks of the McMurdo Volcanic Group. These results and observations suggest that the source of magmas underwent metasomatism prior to partial melting. Article in Journal/Newspaper Antarc* Antarctic Science Antarctica Cambridge University Press Antarctic Science 12 1 105 116 |
institution |
Open Polar |
collection |
Cambridge University Press |
op_collection_id |
crcambridgeupr |
language |
English |
topic |
Geology Ecology, Evolution, Behavior and Systematics Oceanography |
spellingShingle |
Geology Ecology, Evolution, Behavior and Systematics Oceanography Orlando, Andrea Conticelli, Sandro Armienti, Pietro Borrini, Daniele Experimental study on a basanite from the McMurdo Volcanic Group, Antarctica: inference on its mantle source |
topic_facet |
Geology Ecology, Evolution, Behavior and Systematics Oceanography |
description |
Experiments to reconstruct the liquidus curve and establish the phase relationships of a basanite (Mg# = 72) from the McMurdo Volcanic Group, (thought to represent a nearly primary magma) used 1.0– 3.0 GPa and 1175–1550°C. The results suggest that this basanite could be generated by partial melting either of a spinel Iherzolite (at P = 1.5–2.0 GPa and T = 1390–1490°C) or of a garnet pyroxenite (at P > 3.0 GPa and T > 1550°C) source. Several lines of petrological and geochemical evidence support the latter hypothesis. Moreover, experimental results indicate the presence of mica in the source if it is assumed that the magma lost some water during its ascent to the surface. This is supported by the presence of mica and amphibole-bearing mantle xenoliths hosted in the most primitive volcanic rocks of the McMurdo Volcanic Group. These results and observations suggest that the source of magmas underwent metasomatism prior to partial melting. |
format |
Article in Journal/Newspaper |
author |
Orlando, Andrea Conticelli, Sandro Armienti, Pietro Borrini, Daniele |
author_facet |
Orlando, Andrea Conticelli, Sandro Armienti, Pietro Borrini, Daniele |
author_sort |
Orlando, Andrea |
title |
Experimental study on a basanite from the McMurdo Volcanic Group, Antarctica: inference on its mantle source |
title_short |
Experimental study on a basanite from the McMurdo Volcanic Group, Antarctica: inference on its mantle source |
title_full |
Experimental study on a basanite from the McMurdo Volcanic Group, Antarctica: inference on its mantle source |
title_fullStr |
Experimental study on a basanite from the McMurdo Volcanic Group, Antarctica: inference on its mantle source |
title_full_unstemmed |
Experimental study on a basanite from the McMurdo Volcanic Group, Antarctica: inference on its mantle source |
title_sort |
experimental study on a basanite from the mcmurdo volcanic group, antarctica: inference on its mantle source |
publisher |
Cambridge University Press (CUP) |
publishDate |
2000 |
url |
http://dx.doi.org/10.1017/s0954102000000134 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0954102000000134 |
genre |
Antarc* Antarctic Science Antarctica |
genre_facet |
Antarc* Antarctic Science Antarctica |
op_source |
Antarctic Science volume 12, issue 1, page 105-116 ISSN 0954-1020 1365-2079 |
op_rights |
https://www.cambridge.org/core/terms |
op_doi |
https://doi.org/10.1017/s0954102000000134 |
container_title |
Antarctic Science |
container_volume |
12 |
container_issue |
1 |
container_start_page |
105 |
op_container_end_page |
116 |
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1792507107953606656 |