Volatile (S, Cl and F) and fluid mobile trace element compositions in melt inclusions: implications for variable fluid sources across the Kamchatka arc
Volatile element, major and trace element compositions were measured in glass inclusions in olivine from samples across the Kamchatka arc. Glasses were analyzed in reheated melt inclusions by electron microprobe for major elements, S and Cl, trace elements and F were determined by SIMS. Volatile ele...
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ftinstvs:oai:repo.kscnet.ru:3050 2023-12-10T09:50:13+01:00 Volatile (S, Cl and F) and fluid mobile trace element compositions in melt inclusions: implications for variable fluid sources across the Kamchatka arc Churikova Tatiana Wörner Gerhard Mironov Nikita Kronz Andreas 2007 text http://repo.kscnet.ru/3050/ http://repo.kscnet.ru/3050/1/Churikova_2007_Volatile.pdf https://doi.org/10.1007/s00410-007-0190-z en eng http://repo.kscnet.ru/3050/1/Churikova_2007_Volatile.pdf Churikova Tatiana </view/creators/Churikova=3ATatiana=3A=3A.html>, Wörner Gerhard </view/creators/W=F6rner=3AGerhard=3A=3A.html>, Mironov Nikita </view/creators/Mironov=3ANikita=3A=3A.html>, Kronz Andreas </view/creators/Kronz=3AAndreas=3A=3A.html> (2007) Volatile (S, Cl and F) and fluid mobile trace element compositions in melt inclusions: implications for variable fluid sources across the Kamchatka arc // Contributions to Mineralogy and Petrology. Vol. 154, No. 2. pp. 217-239. doi:10.1007/s00410-007-0190-z <https://doi.org/10.1007/s00410-007-0190-z>. doi:10.1007/s00410-007-0190-z 38.37.19 Магматизм и магматические горные породы 38.37.25 Вулканология Ахтанг Гамчен Ичинский Камень Ключевской Статья PeerReviewed 2007 ftinstvs https://doi.org/10.1007/s00410-007-0190-z 2023-11-14T01:10:17Z Volatile element, major and trace element compositions were measured in glass inclusions in olivine from samples across the Kamchatka arc. Glasses were analyzed in reheated melt inclusions by electron microprobe for major elements, S and Cl, trace elements and F were determined by SIMS. Volatile element–trace element ratios correlated with fluid-mobile elements (B, Li) suggesting successive changes and three distinct fluid compositions with increasing slab depth. The Eastern Volcanic arc Front (EVF) was dominated by fluid highly enriched in B, Cl and chalcophile elements and also LILE (U, Th, Ba, Pb), F, S and LREE (La, Ce). This arc-front fluid contributed less to magmas from the central volcanic zone and was not involved in back arc magmatism. The Central Kamchatka Depression (CKD) was dominated by a second fluid enriched in S and U, showing the highest S/K2O and U/Th ratios. Additionally this fluid was unusually enriched in 87Sr and 18O. In the back arc Sredinny Ridge (SR) a third fluid was observed, highly enriched in F, Li, and Be as well as LILE and LREE. We argue from the decoupling of B and Li that dehydration of different water-rich minerals at different depths explains the presence of different fluids across the Kamchatka arc. In the arc front, fluids were derived from amphibole and serpentine dehydration and probably were water-rich, low in silica and high in B, LILE, sulfur and chlorine. Large amounts of water produced high degrees of melting below the EVF and CKD. Fluids below the CKD were released at a depth between 100 and 200 km due to dehydration of lawsonite and phengite and probably were poorer in water and richer in silica. Fluids released at high pressure conditions below the back arc (SR) probably were much denser and dissolved significant amounts of silicate minerals, and potentially carried high amounts of LILE and HFSE. Text Kamchatka Institute of Volcanology and Seismology, Petropavlovsk-Kamchatsky: IVS FEB RAS Repository Contributions to Mineralogy and Petrology 154 2 217 239 |
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Institute of Volcanology and Seismology, Petropavlovsk-Kamchatsky: IVS FEB RAS Repository |
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ftinstvs |
language |
English |
topic |
38.37.19 Магматизм и магматические горные породы 38.37.25 Вулканология Ахтанг Гамчен Ичинский Камень Ключевской |
spellingShingle |
38.37.19 Магматизм и магматические горные породы 38.37.25 Вулканология Ахтанг Гамчен Ичинский Камень Ключевской Churikova Tatiana Wörner Gerhard Mironov Nikita Kronz Andreas Volatile (S, Cl and F) and fluid mobile trace element compositions in melt inclusions: implications for variable fluid sources across the Kamchatka arc |
topic_facet |
38.37.19 Магматизм и магматические горные породы 38.37.25 Вулканология Ахтанг Гамчен Ичинский Камень Ключевской |
description |
Volatile element, major and trace element compositions were measured in glass inclusions in olivine from samples across the Kamchatka arc. Glasses were analyzed in reheated melt inclusions by electron microprobe for major elements, S and Cl, trace elements and F were determined by SIMS. Volatile element–trace element ratios correlated with fluid-mobile elements (B, Li) suggesting successive changes and three distinct fluid compositions with increasing slab depth. The Eastern Volcanic arc Front (EVF) was dominated by fluid highly enriched in B, Cl and chalcophile elements and also LILE (U, Th, Ba, Pb), F, S and LREE (La, Ce). This arc-front fluid contributed less to magmas from the central volcanic zone and was not involved in back arc magmatism. The Central Kamchatka Depression (CKD) was dominated by a second fluid enriched in S and U, showing the highest S/K2O and U/Th ratios. Additionally this fluid was unusually enriched in 87Sr and 18O. In the back arc Sredinny Ridge (SR) a third fluid was observed, highly enriched in F, Li, and Be as well as LILE and LREE. We argue from the decoupling of B and Li that dehydration of different water-rich minerals at different depths explains the presence of different fluids across the Kamchatka arc. In the arc front, fluids were derived from amphibole and serpentine dehydration and probably were water-rich, low in silica and high in B, LILE, sulfur and chlorine. Large amounts of water produced high degrees of melting below the EVF and CKD. Fluids below the CKD were released at a depth between 100 and 200 km due to dehydration of lawsonite and phengite and probably were poorer in water and richer in silica. Fluids released at high pressure conditions below the back arc (SR) probably were much denser and dissolved significant amounts of silicate minerals, and potentially carried high amounts of LILE and HFSE. |
format |
Text |
author |
Churikova Tatiana Wörner Gerhard Mironov Nikita Kronz Andreas |
author_facet |
Churikova Tatiana Wörner Gerhard Mironov Nikita Kronz Andreas |
author_sort |
Churikova Tatiana |
title |
Volatile (S, Cl and F) and fluid mobile trace element compositions in melt inclusions: implications for variable fluid sources across the Kamchatka arc |
title_short |
Volatile (S, Cl and F) and fluid mobile trace element compositions in melt inclusions: implications for variable fluid sources across the Kamchatka arc |
title_full |
Volatile (S, Cl and F) and fluid mobile trace element compositions in melt inclusions: implications for variable fluid sources across the Kamchatka arc |
title_fullStr |
Volatile (S, Cl and F) and fluid mobile trace element compositions in melt inclusions: implications for variable fluid sources across the Kamchatka arc |
title_full_unstemmed |
Volatile (S, Cl and F) and fluid mobile trace element compositions in melt inclusions: implications for variable fluid sources across the Kamchatka arc |
title_sort |
volatile (s, cl and f) and fluid mobile trace element compositions in melt inclusions: implications for variable fluid sources across the kamchatka arc |
publishDate |
2007 |
url |
http://repo.kscnet.ru/3050/ http://repo.kscnet.ru/3050/1/Churikova_2007_Volatile.pdf https://doi.org/10.1007/s00410-007-0190-z |
genre |
Kamchatka |
genre_facet |
Kamchatka |
op_relation |
http://repo.kscnet.ru/3050/1/Churikova_2007_Volatile.pdf Churikova Tatiana </view/creators/Churikova=3ATatiana=3A=3A.html>, Wörner Gerhard </view/creators/W=F6rner=3AGerhard=3A=3A.html>, Mironov Nikita </view/creators/Mironov=3ANikita=3A=3A.html>, Kronz Andreas </view/creators/Kronz=3AAndreas=3A=3A.html> (2007) Volatile (S, Cl and F) and fluid mobile trace element compositions in melt inclusions: implications for variable fluid sources across the Kamchatka arc // Contributions to Mineralogy and Petrology. Vol. 154, No. 2. pp. 217-239. doi:10.1007/s00410-007-0190-z <https://doi.org/10.1007/s00410-007-0190-z>. doi:10.1007/s00410-007-0190-z |
op_doi |
https://doi.org/10.1007/s00410-007-0190-z |
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Contributions to Mineralogy and Petrology |
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154 |
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container_start_page |
217 |
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