High Sulfur in Primitive Arc Magmas, Its Origin and Implications
Sulfur contents in 98.5% of melt inclusions (MI) from calc-alkaline subduction basalts do not exceed 4000 ppm, whereas experimentally established limits of sulfur solubility in basaltic melts with high fO2 (characteristic of subduction zones, e.g., QFM + 2) surpass 14,000 ppm. Here we show that prim...
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ftmdpi:oai:mdpi.com:/2075-163X/12/1/37/ 2023-08-20T04:07:40+02:00 High Sulfur in Primitive Arc Magmas, Its Origin and Implications Michael Zelenski Vadim S. Kamenetsky Nikolai Nekrylov Alkiviadis Kontonikas-Charos agris 2021-12-26 application/pdf https://doi.org/10.3390/min12010037 EN eng Multidisciplinary Digital Publishing Institute Mineral Deposits https://dx.doi.org/10.3390/min12010037 https://creativecommons.org/licenses/by/4.0/ Minerals; Volume 12; Issue 1; Pages: 37 melt inclusion primitive arc basalt high sulfur magmatic anhydrite Text 2021 ftmdpi https://doi.org/10.3390/min12010037 2023-08-01T03:40:07Z Sulfur contents in 98.5% of melt inclusions (MI) from calc-alkaline subduction basalts do not exceed 4000 ppm, whereas experimentally established limits of sulfur solubility in basaltic melts with high fO2 (characteristic of subduction zones, e.g., QFM + 2) surpass 14,000 ppm. Here we show that primitive (Mg# 62-64) subduction melts may contain high sulfur, approaching the experimental limit of sulfur solubility. Up to 11,700 ppm S was measured in olivine-hosted MI from primitive arc basalt from the 1941 eruption of the Tolbachik volcano, Kamchatka. These MI often contain magmatic sulfide globules (occasionally enriched in Cu, Ni, and platinum-group elements) and anhydrite enclosed within a brown, oxidized glass. We conclude that the ubiquitous low sulfur contents in MI may originate either from insufficient availability of sulfur in the magma generation zone or early magma degassing prior to inclusion entrapment. Our findings extend the measured range of sulfur concentrations in primitive calc-alkaline basaltic melts and demonstrate that no fundamental limit of 4000 ppm S exists for relatively oxidized subduction basalts, where the maximum sulfur content may approach the solubility limit determined by crystallization of magmatic anhydrite. Text Kamchatka MDPI Open Access Publishing Tolbachik ENVELOPE(159.960,159.960,55.537,55.537) Minerals 12 1 37 |
institution |
Open Polar |
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MDPI Open Access Publishing |
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ftmdpi |
language |
English |
topic |
melt inclusion primitive arc basalt high sulfur magmatic anhydrite |
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melt inclusion primitive arc basalt high sulfur magmatic anhydrite Michael Zelenski Vadim S. Kamenetsky Nikolai Nekrylov Alkiviadis Kontonikas-Charos High Sulfur in Primitive Arc Magmas, Its Origin and Implications |
topic_facet |
melt inclusion primitive arc basalt high sulfur magmatic anhydrite |
description |
Sulfur contents in 98.5% of melt inclusions (MI) from calc-alkaline subduction basalts do not exceed 4000 ppm, whereas experimentally established limits of sulfur solubility in basaltic melts with high fO2 (characteristic of subduction zones, e.g., QFM + 2) surpass 14,000 ppm. Here we show that primitive (Mg# 62-64) subduction melts may contain high sulfur, approaching the experimental limit of sulfur solubility. Up to 11,700 ppm S was measured in olivine-hosted MI from primitive arc basalt from the 1941 eruption of the Tolbachik volcano, Kamchatka. These MI often contain magmatic sulfide globules (occasionally enriched in Cu, Ni, and platinum-group elements) and anhydrite enclosed within a brown, oxidized glass. We conclude that the ubiquitous low sulfur contents in MI may originate either from insufficient availability of sulfur in the magma generation zone or early magma degassing prior to inclusion entrapment. Our findings extend the measured range of sulfur concentrations in primitive calc-alkaline basaltic melts and demonstrate that no fundamental limit of 4000 ppm S exists for relatively oxidized subduction basalts, where the maximum sulfur content may approach the solubility limit determined by crystallization of magmatic anhydrite. |
format |
Text |
author |
Michael Zelenski Vadim S. Kamenetsky Nikolai Nekrylov Alkiviadis Kontonikas-Charos |
author_facet |
Michael Zelenski Vadim S. Kamenetsky Nikolai Nekrylov Alkiviadis Kontonikas-Charos |
author_sort |
Michael Zelenski |
title |
High Sulfur in Primitive Arc Magmas, Its Origin and Implications |
title_short |
High Sulfur in Primitive Arc Magmas, Its Origin and Implications |
title_full |
High Sulfur in Primitive Arc Magmas, Its Origin and Implications |
title_fullStr |
High Sulfur in Primitive Arc Magmas, Its Origin and Implications |
title_full_unstemmed |
High Sulfur in Primitive Arc Magmas, Its Origin and Implications |
title_sort |
high sulfur in primitive arc magmas, its origin and implications |
publisher |
Multidisciplinary Digital Publishing Institute |
publishDate |
2021 |
url |
https://doi.org/10.3390/min12010037 |
op_coverage |
agris |
long_lat |
ENVELOPE(159.960,159.960,55.537,55.537) |
geographic |
Tolbachik |
geographic_facet |
Tolbachik |
genre |
Kamchatka |
genre_facet |
Kamchatka |
op_source |
Minerals; Volume 12; Issue 1; Pages: 37 |
op_relation |
Mineral Deposits https://dx.doi.org/10.3390/min12010037 |
op_rights |
https://creativecommons.org/licenses/by/4.0/ |
op_doi |
https://doi.org/10.3390/min12010037 |
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Minerals |
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12 |
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1 |
container_start_page |
37 |
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1774719475973619712 |