Reprint of Silicate-sulfide liquid immiscibility in modern arc basalt (Tolbachik volcano, Kamchatka): Part II. Composition, liquidus assemblage and fractionation of the silicate melt
Olivine-hosted inclusions of silicate and sulfide melts, Cr-spinel and pyroxene were studied to estimate magma composition, temperature, pressure, and fO2 at the onset and during the silicate-sulfide immiscibility in modern arc basalt from Tolbachik volcano, Kamchatka arc. We demonstrate that the ol...
Published in: | Chemical Geology |
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Format: | Article in Journal/Newspaper |
Language: | English |
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Elsevier
2018
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Online Access: | https://oceanrep.geomar.de/id/eprint/40058/ https://oceanrep.geomar.de/id/eprint/40058/1/1-s2.0-S0009254117305910-main.pdf https://oceanrep.geomar.de/id/eprint/40058/2/1-s2.0-S0009254117305910-mmc1.docx https://oceanrep.geomar.de/id/eprint/40058/3/1-s2.0-S0009254117305910-mmc2.xlsx https://oceanrep.geomar.de/id/eprint/40058/11/Kamenetsky.pdf https://doi.org/10.1016/j.chemgeo.2017.10.026 |
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ftoceanrep:oai:oceanrep.geomar.de:40058 2023-05-15T16:59:03+02:00 Reprint of Silicate-sulfide liquid immiscibility in modern arc basalt (Tolbachik volcano, Kamchatka): Part II. Composition, liquidus assemblage and fractionation of the silicate melt Kamenetsky, Vadim S. Zelenski, Michael Gurenko, Andrey Portnyagin, Maxim Ehrig, Kathy Kamenetsky, Maya Churikova, Tatiana Feig, Sandrin 2018-02-05 text other https://oceanrep.geomar.de/id/eprint/40058/ https://oceanrep.geomar.de/id/eprint/40058/1/1-s2.0-S0009254117305910-main.pdf https://oceanrep.geomar.de/id/eprint/40058/2/1-s2.0-S0009254117305910-mmc1.docx https://oceanrep.geomar.de/id/eprint/40058/3/1-s2.0-S0009254117305910-mmc2.xlsx https://oceanrep.geomar.de/id/eprint/40058/11/Kamenetsky.pdf https://doi.org/10.1016/j.chemgeo.2017.10.026 en eng Elsevier https://oceanrep.geomar.de/id/eprint/40058/1/1-s2.0-S0009254117305910-main.pdf https://oceanrep.geomar.de/id/eprint/40058/2/1-s2.0-S0009254117305910-mmc1.docx https://oceanrep.geomar.de/id/eprint/40058/3/1-s2.0-S0009254117305910-mmc2.xlsx https://oceanrep.geomar.de/id/eprint/40058/11/Kamenetsky.pdf Kamenetsky, V. S., Zelenski, M., Gurenko, A., Portnyagin, M. , Ehrig, K., Kamenetsky, M., Churikova, T. and Feig, S. (2018) Reprint of Silicate-sulfide liquid immiscibility in modern arc basalt (Tolbachik volcano, Kamchatka): Part II. Composition, liquidus assemblage and fractionation of the silicate melt. Open Access Chemical Geology, 478 . pp. 112-130. DOI 10.1016/j.chemgeo.2017.10.026 <https://doi.org/10.1016/j.chemgeo.2017.10.026>. doi:10.1016/j.chemgeo.2017.10.026 info:eu-repo/semantics/openAccess Article PeerReviewed 2018 ftoceanrep https://doi.org/10.1016/j.chemgeo.2017.10.026 2023-04-07T15:36:21Z Olivine-hosted inclusions of silicate and sulfide melts, Cr-spinel and pyroxene were studied to estimate magma composition, temperature, pressure, and fO2 at the onset and during the silicate-sulfide immiscibility in modern arc basalt from Tolbachik volcano, Kamchatka arc. We demonstrate that the olivine phenocrysts hosting sulfide and silicate melt inclusions belong to the same population. The compositions of the silicate melt inclusions in most primitive olivine (88–91 mol% Fo) represent moderately oxidized (~ QFM + 1.1) high-MgO (up to 12–12.6 wt%) and high CaO/Al2O3 (0.8–1.2) melt that has abundances and ratios of the lithophile trace elements typical of island arc magmas. The initial volatile contents in parental Tolbachik magma are estimated from the melt inclusions and mass-balance considerations to be at least 4.9 wt% H2O, 2600 ppm S, 1100 ppm Cl, 550 ppm F, and 1200 ppm CO2. These data are used to calculate the temperature (~ 1220 °C) and minimum pressure (3 kbar) at which the beginning of crystallization and exsolution of sulfide melt took place. The presence of anhydrite, especially ubiquitous in the crystallized silicate melt associated with sulfide globules, suggest that much higher sulfur abundances prior to degassing and sulfate immiscibility and/or crystallization should be expected. We tentatively considered hydrothermal accumulations of sulfur (elemental, sulfate and sulfide) in the volcanic conduit responsible for local contamination and oversaturation of the Tolbachik magma in sulfur and related sulfide immiscibility. Coexisting sulfide and sulfate can be also interpreted in favor of the magmatic sulfide oxidation and related generation of S-rich fluids. Such fluids are expected to accumulate metals released from decomposed sulfide melts and supply significant epithermal mineralization, including native gold. Article in Journal/Newspaper Kamchatka OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel) Tolbachik ENVELOPE(159.960,159.960,55.537,55.537) Chemical Geology 478 112 130 |
institution |
Open Polar |
collection |
OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel) |
op_collection_id |
ftoceanrep |
language |
English |
description |
Olivine-hosted inclusions of silicate and sulfide melts, Cr-spinel and pyroxene were studied to estimate magma composition, temperature, pressure, and fO2 at the onset and during the silicate-sulfide immiscibility in modern arc basalt from Tolbachik volcano, Kamchatka arc. We demonstrate that the olivine phenocrysts hosting sulfide and silicate melt inclusions belong to the same population. The compositions of the silicate melt inclusions in most primitive olivine (88–91 mol% Fo) represent moderately oxidized (~ QFM + 1.1) high-MgO (up to 12–12.6 wt%) and high CaO/Al2O3 (0.8–1.2) melt that has abundances and ratios of the lithophile trace elements typical of island arc magmas. The initial volatile contents in parental Tolbachik magma are estimated from the melt inclusions and mass-balance considerations to be at least 4.9 wt% H2O, 2600 ppm S, 1100 ppm Cl, 550 ppm F, and 1200 ppm CO2. These data are used to calculate the temperature (~ 1220 °C) and minimum pressure (3 kbar) at which the beginning of crystallization and exsolution of sulfide melt took place. The presence of anhydrite, especially ubiquitous in the crystallized silicate melt associated with sulfide globules, suggest that much higher sulfur abundances prior to degassing and sulfate immiscibility and/or crystallization should be expected. We tentatively considered hydrothermal accumulations of sulfur (elemental, sulfate and sulfide) in the volcanic conduit responsible for local contamination and oversaturation of the Tolbachik magma in sulfur and related sulfide immiscibility. Coexisting sulfide and sulfate can be also interpreted in favor of the magmatic sulfide oxidation and related generation of S-rich fluids. Such fluids are expected to accumulate metals released from decomposed sulfide melts and supply significant epithermal mineralization, including native gold. |
format |
Article in Journal/Newspaper |
author |
Kamenetsky, Vadim S. Zelenski, Michael Gurenko, Andrey Portnyagin, Maxim Ehrig, Kathy Kamenetsky, Maya Churikova, Tatiana Feig, Sandrin |
spellingShingle |
Kamenetsky, Vadim S. Zelenski, Michael Gurenko, Andrey Portnyagin, Maxim Ehrig, Kathy Kamenetsky, Maya Churikova, Tatiana Feig, Sandrin Reprint of Silicate-sulfide liquid immiscibility in modern arc basalt (Tolbachik volcano, Kamchatka): Part II. Composition, liquidus assemblage and fractionation of the silicate melt |
author_facet |
Kamenetsky, Vadim S. Zelenski, Michael Gurenko, Andrey Portnyagin, Maxim Ehrig, Kathy Kamenetsky, Maya Churikova, Tatiana Feig, Sandrin |
author_sort |
Kamenetsky, Vadim S. |
title |
Reprint of Silicate-sulfide liquid immiscibility in modern arc basalt (Tolbachik volcano, Kamchatka): Part II. Composition, liquidus assemblage and fractionation of the silicate melt |
title_short |
Reprint of Silicate-sulfide liquid immiscibility in modern arc basalt (Tolbachik volcano, Kamchatka): Part II. Composition, liquidus assemblage and fractionation of the silicate melt |
title_full |
Reprint of Silicate-sulfide liquid immiscibility in modern arc basalt (Tolbachik volcano, Kamchatka): Part II. Composition, liquidus assemblage and fractionation of the silicate melt |
title_fullStr |
Reprint of Silicate-sulfide liquid immiscibility in modern arc basalt (Tolbachik volcano, Kamchatka): Part II. Composition, liquidus assemblage and fractionation of the silicate melt |
title_full_unstemmed |
Reprint of Silicate-sulfide liquid immiscibility in modern arc basalt (Tolbachik volcano, Kamchatka): Part II. Composition, liquidus assemblage and fractionation of the silicate melt |
title_sort |
reprint of silicate-sulfide liquid immiscibility in modern arc basalt (tolbachik volcano, kamchatka): part ii. composition, liquidus assemblage and fractionation of the silicate melt |
publisher |
Elsevier |
publishDate |
2018 |
url |
https://oceanrep.geomar.de/id/eprint/40058/ https://oceanrep.geomar.de/id/eprint/40058/1/1-s2.0-S0009254117305910-main.pdf https://oceanrep.geomar.de/id/eprint/40058/2/1-s2.0-S0009254117305910-mmc1.docx https://oceanrep.geomar.de/id/eprint/40058/3/1-s2.0-S0009254117305910-mmc2.xlsx https://oceanrep.geomar.de/id/eprint/40058/11/Kamenetsky.pdf https://doi.org/10.1016/j.chemgeo.2017.10.026 |
long_lat |
ENVELOPE(159.960,159.960,55.537,55.537) |
geographic |
Tolbachik |
geographic_facet |
Tolbachik |
genre |
Kamchatka |
genre_facet |
Kamchatka |
op_relation |
https://oceanrep.geomar.de/id/eprint/40058/1/1-s2.0-S0009254117305910-main.pdf https://oceanrep.geomar.de/id/eprint/40058/2/1-s2.0-S0009254117305910-mmc1.docx https://oceanrep.geomar.de/id/eprint/40058/3/1-s2.0-S0009254117305910-mmc2.xlsx https://oceanrep.geomar.de/id/eprint/40058/11/Kamenetsky.pdf Kamenetsky, V. S., Zelenski, M., Gurenko, A., Portnyagin, M. , Ehrig, K., Kamenetsky, M., Churikova, T. and Feig, S. (2018) Reprint of Silicate-sulfide liquid immiscibility in modern arc basalt (Tolbachik volcano, Kamchatka): Part II. Composition, liquidus assemblage and fractionation of the silicate melt. Open Access Chemical Geology, 478 . pp. 112-130. DOI 10.1016/j.chemgeo.2017.10.026 <https://doi.org/10.1016/j.chemgeo.2017.10.026>. doi:10.1016/j.chemgeo.2017.10.026 |
op_rights |
info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.1016/j.chemgeo.2017.10.026 |
container_title |
Chemical Geology |
container_volume |
478 |
container_start_page |
112 |
op_container_end_page |
130 |
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1766051225922437120 |