Melt inclusions in olivine and plagioclase phenocrysts from Antarctic-Phoenix Ridge basalts: Implications for origins of N- and E-type MORB parent magmas
International audience The Antarctic-Phoenix Ridge (APR) is a fossil spreading center in the Drake Passage, Antarctic Ocean. Spreading ceased in chron C2A (ca. 3.3 Ma). Although the APR is a normal ridge that is not influenced by a hotspot, enriched (E-type) mid-ocean ridge basalt (MORB) coexists wi...
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ftinsu:oai:HAL:hal-00996552v1 2023-06-18T03:38:17+02:00 Melt inclusions in olivine and plagioclase phenocrysts from Antarctic-Phoenix Ridge basalts: Implications for origins of N- and E-type MORB parent magmas Hi Choi, Sung Schiano, Pierre Chen, Yang Devidal, Jean-Luc Kyung Choo, Mi Lee, Jong-Ik Department of Geology and Earth Environmental Sciences Daejeon Chungnam National University (CNU) Laboratoire Magmas et Volcans (LMV) Observatoire de Physique du Globe de Clermont-Ferrand (OPGC) Université Blaise Pascal - Clermont-Ferrand 2 (UBP)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Université Blaise Pascal - Clermont-Ferrand 2 (UBP)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Université Jean Monnet - Saint-Étienne (UJM)-Centre National de la Recherche Scientifique (CNRS) Department of Science Education EWHA Womans University (EWHA) Korea Polar Research Institute (KOPRI) 2013 https://hal.science/hal-00996552 https://doi.org/10.1016/j.jvolgeores.2012.12.008 en eng HAL CCSD Elsevier info:eu-repo/semantics/altIdentifier/doi/10.1016/j.jvolgeores.2012.12.008 hal-00996552 https://hal.science/hal-00996552 doi:10.1016/j.jvolgeores.2012.12.008 ISSN: 0377-0273 Journal of Volcanology and Geothermal Research https://hal.science/hal-00996552 Journal of Volcanology and Geothermal Research, 2013, 253, pp.75-86. ⟨10.1016/j.jvolgeores.2012.12.008⟩ Melt inclusion Olivine phenocryst Plagioclase phenocryst N-MORB E-MORB Antarctic-Phoenix ridge [SDU.STU.PE]Sciences of the Universe [physics]/Earth Sciences/Petrography info:eu-repo/semantics/article Journal articles 2013 ftinsu https://doi.org/10.1016/j.jvolgeores.2012.12.008 2023-06-05T18:47:59Z International audience The Antarctic-Phoenix Ridge (APR) is a fossil spreading center in the Drake Passage, Antarctic Ocean. Spreading ceased in chron C2A (ca. 3.3 Ma). Although the APR is a normal ridge that is not influenced by a hotspot, enriched (E-type) mid-ocean ridge basalt (MORB) coexists with normal (N-type) MORB in the ridge's axial region. The E-type APR basalt is relatively young (< 3.1 Ma) compared to the N-type basalt (> 3.5 Ma). The E-type basalt is characterized by elevated K2O/TiO2 (= 0.4-0.8) and (La/Sm)N (= 2.2-3.4) ratios, relative to the N-type basalt (K2O/TiO2 = 0.1-0.3; (La/Sm)N = 0.7-0.8). To better understand the compositional variation in the APR basalts and their mantle source regions through time, silicate melt inclusions in primitive olivine (Fo87-89) and plagioclase (An85-89) phenocrysts from the N-type APR basalt were studied. Rehomogenized melt inclusions were analyzed by electron microprobe and LA-ICPMS for major and trace elements. The melt inclusions are more primitive than the host basalt, with Mg#s from 67.5 to 74.1. All inclusions exhibit patterns that are depleted in the light rare earth elements. The inclusions have K2O/TiO2 from 0.1 to 0.3 and (La/Sm)N ratios from 0.4 to 0.9; these values overlap with those of the N-type APR basalt. Furthermore, the melt inclusions have elevated (Lu/Hf)N and (Sm/Nd)N ratios compared to the E-type basalts. The N-type APR basalts do not contain any melt inclusions that are enriched in incompatible elements. The E-type basalt was generated by a low degree of partial melting of a relatively incompatible-element-enriched mantle source. In contrast, chemistries of melt inclusions and N-type basalts are compatible with high degrees of partial melting of an increasingly depleted mantle source. Assuming a veined or otherwise heterogeneous mantle, the absence of E-type inclusions from the N-type host has implications for cyclic magmatic activity beneath the APR. Multi-stage mantle melting and melt extraction from a composite source with ... Article in Journal/Newspaper Antarc* Antarctic Antarctic Ocean Drake Passage Institut national des sciences de l'Univers: HAL-INSU Antarctic Antarctic Ocean Drake Passage The Antarctic Journal of Volcanology and Geothermal Research 253 75 86 |
institution |
Open Polar |
collection |
Institut national des sciences de l'Univers: HAL-INSU |
op_collection_id |
ftinsu |
language |
English |
topic |
Melt inclusion Olivine phenocryst Plagioclase phenocryst N-MORB E-MORB Antarctic-Phoenix ridge [SDU.STU.PE]Sciences of the Universe [physics]/Earth Sciences/Petrography |
spellingShingle |
Melt inclusion Olivine phenocryst Plagioclase phenocryst N-MORB E-MORB Antarctic-Phoenix ridge [SDU.STU.PE]Sciences of the Universe [physics]/Earth Sciences/Petrography Hi Choi, Sung Schiano, Pierre Chen, Yang Devidal, Jean-Luc Kyung Choo, Mi Lee, Jong-Ik Melt inclusions in olivine and plagioclase phenocrysts from Antarctic-Phoenix Ridge basalts: Implications for origins of N- and E-type MORB parent magmas |
topic_facet |
Melt inclusion Olivine phenocryst Plagioclase phenocryst N-MORB E-MORB Antarctic-Phoenix ridge [SDU.STU.PE]Sciences of the Universe [physics]/Earth Sciences/Petrography |
description |
International audience The Antarctic-Phoenix Ridge (APR) is a fossil spreading center in the Drake Passage, Antarctic Ocean. Spreading ceased in chron C2A (ca. 3.3 Ma). Although the APR is a normal ridge that is not influenced by a hotspot, enriched (E-type) mid-ocean ridge basalt (MORB) coexists with normal (N-type) MORB in the ridge's axial region. The E-type APR basalt is relatively young (< 3.1 Ma) compared to the N-type basalt (> 3.5 Ma). The E-type basalt is characterized by elevated K2O/TiO2 (= 0.4-0.8) and (La/Sm)N (= 2.2-3.4) ratios, relative to the N-type basalt (K2O/TiO2 = 0.1-0.3; (La/Sm)N = 0.7-0.8). To better understand the compositional variation in the APR basalts and their mantle source regions through time, silicate melt inclusions in primitive olivine (Fo87-89) and plagioclase (An85-89) phenocrysts from the N-type APR basalt were studied. Rehomogenized melt inclusions were analyzed by electron microprobe and LA-ICPMS for major and trace elements. The melt inclusions are more primitive than the host basalt, with Mg#s from 67.5 to 74.1. All inclusions exhibit patterns that are depleted in the light rare earth elements. The inclusions have K2O/TiO2 from 0.1 to 0.3 and (La/Sm)N ratios from 0.4 to 0.9; these values overlap with those of the N-type APR basalt. Furthermore, the melt inclusions have elevated (Lu/Hf)N and (Sm/Nd)N ratios compared to the E-type basalts. The N-type APR basalts do not contain any melt inclusions that are enriched in incompatible elements. The E-type basalt was generated by a low degree of partial melting of a relatively incompatible-element-enriched mantle source. In contrast, chemistries of melt inclusions and N-type basalts are compatible with high degrees of partial melting of an increasingly depleted mantle source. Assuming a veined or otherwise heterogeneous mantle, the absence of E-type inclusions from the N-type host has implications for cyclic magmatic activity beneath the APR. Multi-stage mantle melting and melt extraction from a composite source with ... |
author2 |
Department of Geology and Earth Environmental Sciences Daejeon Chungnam National University (CNU) Laboratoire Magmas et Volcans (LMV) Observatoire de Physique du Globe de Clermont-Ferrand (OPGC) Université Blaise Pascal - Clermont-Ferrand 2 (UBP)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Université Blaise Pascal - Clermont-Ferrand 2 (UBP)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Université Jean Monnet - Saint-Étienne (UJM)-Centre National de la Recherche Scientifique (CNRS) Department of Science Education EWHA Womans University (EWHA) Korea Polar Research Institute (KOPRI) |
format |
Article in Journal/Newspaper |
author |
Hi Choi, Sung Schiano, Pierre Chen, Yang Devidal, Jean-Luc Kyung Choo, Mi Lee, Jong-Ik |
author_facet |
Hi Choi, Sung Schiano, Pierre Chen, Yang Devidal, Jean-Luc Kyung Choo, Mi Lee, Jong-Ik |
author_sort |
Hi Choi, Sung |
title |
Melt inclusions in olivine and plagioclase phenocrysts from Antarctic-Phoenix Ridge basalts: Implications for origins of N- and E-type MORB parent magmas |
title_short |
Melt inclusions in olivine and plagioclase phenocrysts from Antarctic-Phoenix Ridge basalts: Implications for origins of N- and E-type MORB parent magmas |
title_full |
Melt inclusions in olivine and plagioclase phenocrysts from Antarctic-Phoenix Ridge basalts: Implications for origins of N- and E-type MORB parent magmas |
title_fullStr |
Melt inclusions in olivine and plagioclase phenocrysts from Antarctic-Phoenix Ridge basalts: Implications for origins of N- and E-type MORB parent magmas |
title_full_unstemmed |
Melt inclusions in olivine and plagioclase phenocrysts from Antarctic-Phoenix Ridge basalts: Implications for origins of N- and E-type MORB parent magmas |
title_sort |
melt inclusions in olivine and plagioclase phenocrysts from antarctic-phoenix ridge basalts: implications for origins of n- and e-type morb parent magmas |
publisher |
HAL CCSD |
publishDate |
2013 |
url |
https://hal.science/hal-00996552 https://doi.org/10.1016/j.jvolgeores.2012.12.008 |
geographic |
Antarctic Antarctic Ocean Drake Passage The Antarctic |
geographic_facet |
Antarctic Antarctic Ocean Drake Passage The Antarctic |
genre |
Antarc* Antarctic Antarctic Ocean Drake Passage |
genre_facet |
Antarc* Antarctic Antarctic Ocean Drake Passage |
op_source |
ISSN: 0377-0273 Journal of Volcanology and Geothermal Research https://hal.science/hal-00996552 Journal of Volcanology and Geothermal Research, 2013, 253, pp.75-86. ⟨10.1016/j.jvolgeores.2012.12.008⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1016/j.jvolgeores.2012.12.008 hal-00996552 https://hal.science/hal-00996552 doi:10.1016/j.jvolgeores.2012.12.008 |
op_doi |
https://doi.org/10.1016/j.jvolgeores.2012.12.008 |
container_title |
Journal of Volcanology and Geothermal Research |
container_volume |
253 |
container_start_page |
75 |
op_container_end_page |
86 |
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1769003242322132992 |