DOI: 10.1016/j.earscirev.2018.12.008
论文题名: Long and short-term magma differentiation at Mt. Etna as revealed by Sr-Nd isotopes and geochemical data
作者: Di Renzo V. ; Corsaro R.A. ; Miraglia L. ; Pompilio M. ; Civetta L.
刊名: Earth Science Reviews
ISSN: 00128252
出版年: 2019
卷: 190 起始页码: 112
结束页码: 130
语种: 英语
中文关键词: Bulk rocks composition
; Magma differentiation
; Magma mixing
; Mt. Etna
; Sr-Nd isotopes
; Volcano plumbing system
英文关键词: geochemical method
; isotopic analysis
; magma assimilation
; neodymium isotope
; strontium isotope
; volcano
; Catania [Sicily]
; Etna
; Italy
; Sicily
英文摘要: Mt. Etna, in Sicily (Italy), produces effusive and explosive eruptions from summit craters and flanks. Petrology of erupted products has proved fundamental to explore the relationship between magma dynamics within the plumbing system and eruptive styles. Data of Sr–Nd isotopes are quite scarce if compared with the great number of chemical analyses carried out in products of last decades. We measure Sr–Nd isotopes, major and trace elements in products emitted from 2001 to 2012, and consider also published analyses of the 1995–2001 eruptions, because carried out in the same laboratories of 2001–2012 ones. Furthermore, we take into account other published analyses extending back to the 14th century, even if performed by different facilities. Based on this dataset, magma dynamics operating at different timescales inside the volcano's plumbing system have been explored. Our analyses evidence that, from 2001–2012, three magma types are present in the volcano's plumbing system: (i) a deep and poorly evolved basaltic and K-trachybasaltic magma, enriched in radiogenic Sr and LILE, erupted during the 2001 and 2002–03 flank activity; (ii) a shallower more evolved K-trachybasaltic magma, less enriched in radiogenic Sr, feeding both summit and flank eruptions and (iii) an uncommon, and scarcely radiogenic hawaiitic magma, LILE poor, emitted exclusively from a small sector of the 2002–03 eruptive fissures. By considering a broader time scale, from 14th to 21st century, we conclude that: (i) different magmatic components are present in the deep volcano's plumbing system, at about 10–12 km b.s.l; (ii) a decoupling of geochemical and isotopic features in magmas stored at different depths is observed after the 1974 flank eruption up to date; (iii) mixing between different magmas is an efficient magmatic process to produce magma differentiation at Mt. Etna, regardless of the investigated temporal scale. © 2018 Elsevier B.V. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/165792
Appears in Collections: 气候变化与战略
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作者单位: Dipartimento di Ingegneria Civile, Design, Edilizia e Ambiente, Università degli Studi della Campania Luigi Vanvitelli, via Roma 29, Aversa, CE 81031, Italy; INGV, Sezione di Catania – Osservatorio Etneo, piazza Roma 2, Catania, 95125, Italy; INGV, Sezione di Pisa, via della Faggiola 32, Pisa, 56126, Italy; Dipartimento di Scienze della Terra, dell'Ambiente e delle Risorse, Università di Napoli Federico II, Largo San Marcellino 10, Napoli, 80138, Italy
Recommended Citation:
Di Renzo V.,Corsaro R.A.,Miraglia L.,et al. Long and short-term magma differentiation at Mt. Etna as revealed by Sr-Nd isotopes and geochemical data[J]. Earth Science Reviews,2019-01-01,190