The December 2018 eruption at Etna volcano: a geochemical study on melt and fluid inclusions
This study focus on the Mt Etna December 2018 eruption with the aim of investigating the geochemical characteristics of the feeding magma. New data on major and trace element geochemistry of olivine-hosted melt inclusions (MI) in volcanic products are presented together with the noble gas geochemist...
| Main Authors: | , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Frontiers Media S.A.
2024-01-01
|
| Series: | Frontiers in Earth Science |
| Subjects: | |
| Online Access: | https://www.frontiersin.org/articles/10.3389/feart.2023.1122132/full |
| _version_ | 1797367686041174016 |
|---|---|
| author | Alessandra Correale Rosa Anna Corsaro Lucia Miraglia Antonio Paonita Silvio G. Rotolo Silvio G. Rotolo |
| author_facet | Alessandra Correale Rosa Anna Corsaro Lucia Miraglia Antonio Paonita Silvio G. Rotolo Silvio G. Rotolo |
| author_sort | Alessandra Correale |
| collection | DOAJ |
| description | This study focus on the Mt Etna December 2018 eruption with the aim of investigating the geochemical characteristics of the feeding magma. New data on major and trace element geochemistry of olivine-hosted melt inclusions (MI) in volcanic products are presented together with the noble gas geochemistry of fluid inclusions (FI) in olivines. The noble gas geochemistry of fluid inclusions (FIs) in olivines was also investigated. The major element composition of MIs is variable from tephrite/trachybasalt to phonotephrite/basaltic trachyandesite, with SiO2 = 45.51–52.72 wt%, MgO = 4.01–6.02 wt%, and CaO/Al2O3 = 0.34–0.72. Trace element patterns of MIs present a typical enrichment in LILE and LREE, depletion in HFSE, and relatively fractionated REE patterns: (La/Lu) N= 18.8–41.08, with Eu/Eu* = (0.5–1.8). Positive anomalies in Sr (Sr/Sr* = 0.8–2.3) and Ba can be ascribed to the assimilation of plagioclase-rich cumulates in the magmatic reservoir. The variable Ba/La (9.8–15.8), K/Nb (260–1037), Ce/Nb (1.9–3.4), Rb/La (0.4–1.6), and Ba/Nb (10.8–25.8) ratios reveal mixing between two types of end-member magmas comparable to those emitted from 1) the 2001 Upper Vents and 2002–03 Northern Fissures (Type-1) and 2) the 2001 Lower Vents and 2002–03 Southern Fissures (Type-2), respectively. Type-2 represents a magma that was under the influence of a crustal component, whereas Type-1 is compatible with a HIMU–MORB-type heterogeneous mantle source. It appears that the 2018 MIs have captured the two different types of magmas, and the lack of homogenization may imply a very fast ascent (a few months). Compatible with the contemporary presence of primordial HIMU–MORB and crust-contaminated end-members are the data on noble gases from FI that highlighted an 3He/4He value of 6.5–6.6Ra. The hypothesis of two different types of magmas, identified by the trace element geochemistry in MIs, is, thus, reinforced by helium isotopic data on FI of the 2018 eruption together with data from other Etnean eruptions and allows the inference of a bicomponent magma mixing. |
| first_indexed | 2024-03-08T17:21:45Z |
| format | Article |
| id | doaj.art-6640b626d5c845ca8447475408fc2bb1 |
| institution | Directory Open Access Journal |
| issn | 2296-6463 |
| language | English |
| last_indexed | 2024-03-08T17:21:45Z |
| publishDate | 2024-01-01 |
| publisher | Frontiers Media S.A. |
| record_format | Article |
| series | Frontiers in Earth Science |
| spelling | doaj.art-6640b626d5c845ca8447475408fc2bb12024-01-03T04:42:35ZengFrontiers Media S.A.Frontiers in Earth Science2296-64632024-01-011110.3389/feart.2023.11221321122132The December 2018 eruption at Etna volcano: a geochemical study on melt and fluid inclusionsAlessandra Correale0Rosa Anna Corsaro1Lucia Miraglia2Antonio Paonita3Silvio G. Rotolo4Silvio G. Rotolo5Istituto Nazionale di Geofisica e Vulcanologia, Sezione di Palermo, Palermo, ItalyIstituto Nazionale di Geofisica e Vulcanologia, Sezione di Catania, Catania, ItalyIstituto Nazionale di Geofisica e Vulcanologia, Sezione di Catania, Catania, ItalyIstituto Nazionale di Geofisica e Vulcanologia, Sezione di Palermo, Palermo, ItalyIstituto Nazionale di Geofisica e Vulcanologia, Sezione di Palermo, Palermo, ItalyDipartimento di Scienze della Terra e del Mare (DiSTeM), Università degli Studi di Palermo, Palermo, ItalyThis study focus on the Mt Etna December 2018 eruption with the aim of investigating the geochemical characteristics of the feeding magma. New data on major and trace element geochemistry of olivine-hosted melt inclusions (MI) in volcanic products are presented together with the noble gas geochemistry of fluid inclusions (FI) in olivines. The noble gas geochemistry of fluid inclusions (FIs) in olivines was also investigated. The major element composition of MIs is variable from tephrite/trachybasalt to phonotephrite/basaltic trachyandesite, with SiO2 = 45.51–52.72 wt%, MgO = 4.01–6.02 wt%, and CaO/Al2O3 = 0.34–0.72. Trace element patterns of MIs present a typical enrichment in LILE and LREE, depletion in HFSE, and relatively fractionated REE patterns: (La/Lu) N= 18.8–41.08, with Eu/Eu* = (0.5–1.8). Positive anomalies in Sr (Sr/Sr* = 0.8–2.3) and Ba can be ascribed to the assimilation of plagioclase-rich cumulates in the magmatic reservoir. The variable Ba/La (9.8–15.8), K/Nb (260–1037), Ce/Nb (1.9–3.4), Rb/La (0.4–1.6), and Ba/Nb (10.8–25.8) ratios reveal mixing between two types of end-member magmas comparable to those emitted from 1) the 2001 Upper Vents and 2002–03 Northern Fissures (Type-1) and 2) the 2001 Lower Vents and 2002–03 Southern Fissures (Type-2), respectively. Type-2 represents a magma that was under the influence of a crustal component, whereas Type-1 is compatible with a HIMU–MORB-type heterogeneous mantle source. It appears that the 2018 MIs have captured the two different types of magmas, and the lack of homogenization may imply a very fast ascent (a few months). Compatible with the contemporary presence of primordial HIMU–MORB and crust-contaminated end-members are the data on noble gases from FI that highlighted an 3He/4He value of 6.5–6.6Ra. The hypothesis of two different types of magmas, identified by the trace element geochemistry in MIs, is, thus, reinforced by helium isotopic data on FI of the 2018 eruption together with data from other Etnean eruptions and allows the inference of a bicomponent magma mixing.https://www.frontiersin.org/articles/10.3389/feart.2023.1122132/fullmelt inclusionsfluid inclusionstrace elementsnoble gasesMt. Etna |
| spellingShingle | Alessandra Correale Rosa Anna Corsaro Lucia Miraglia Antonio Paonita Silvio G. Rotolo Silvio G. Rotolo The December 2018 eruption at Etna volcano: a geochemical study on melt and fluid inclusions Frontiers in Earth Science melt inclusions fluid inclusions trace elements noble gases Mt. Etna |
| title | The December 2018 eruption at Etna volcano: a geochemical study on melt and fluid inclusions |
| title_full | The December 2018 eruption at Etna volcano: a geochemical study on melt and fluid inclusions |
| title_fullStr | The December 2018 eruption at Etna volcano: a geochemical study on melt and fluid inclusions |
| title_full_unstemmed | The December 2018 eruption at Etna volcano: a geochemical study on melt and fluid inclusions |
| title_short | The December 2018 eruption at Etna volcano: a geochemical study on melt and fluid inclusions |
| title_sort | december 2018 eruption at etna volcano a geochemical study on melt and fluid inclusions |
| topic | melt inclusions fluid inclusions trace elements noble gases Mt. Etna |
| url | https://www.frontiersin.org/articles/10.3389/feart.2023.1122132/full |
| work_keys_str_mv | AT alessandracorreale thedecember2018eruptionatetnavolcanoageochemicalstudyonmeltandfluidinclusions AT rosaannacorsaro thedecember2018eruptionatetnavolcanoageochemicalstudyonmeltandfluidinclusions AT luciamiraglia thedecember2018eruptionatetnavolcanoageochemicalstudyonmeltandfluidinclusions AT antoniopaonita thedecember2018eruptionatetnavolcanoageochemicalstudyonmeltandfluidinclusions AT silviogrotolo thedecember2018eruptionatetnavolcanoageochemicalstudyonmeltandfluidinclusions AT silviogrotolo thedecember2018eruptionatetnavolcanoageochemicalstudyonmeltandfluidinclusions AT alessandracorreale december2018eruptionatetnavolcanoageochemicalstudyonmeltandfluidinclusions AT rosaannacorsaro december2018eruptionatetnavolcanoageochemicalstudyonmeltandfluidinclusions AT luciamiraglia december2018eruptionatetnavolcanoageochemicalstudyonmeltandfluidinclusions AT antoniopaonita december2018eruptionatetnavolcanoageochemicalstudyonmeltandfluidinclusions AT silviogrotolo december2018eruptionatetnavolcanoageochemicalstudyonmeltandfluidinclusions AT silviogrotolo december2018eruptionatetnavolcanoageochemicalstudyonmeltandfluidinclusions |