Subduction-like fluids in the genesis of Mt. Etna magmas: evidence from boron isotopes and fluid mobile elements
作者: Sonia TonariniPietro ArmientiMassimo D’OrazioFabrizio Innocenti
作者单位: 1Istituto di Geocronologia e Geochimica Isotopica, C.N.R., Via Moruzzi 1, 56124 Pisa, Italy
2Dipartimento di Scienze della Terra, Università di Pisa, Via S. Maria 53, 56126 Pisa, Italy
3Centro di Studio per la Geologia Strutturale e Dinamica dell’Appennino, C.N.R., Via S. Maria 53, 56126 Pisa, Italy
刊名: Earth and Planetary Science Letters, 2001, Vol.192 (4), pp.471-483
来源数据库: Elsevier Journal
DOI: 10.1016/S0012-821X(01)00487-3
关键词: Mount EtnaB-11/B-10subductionfluid phaseisotope ratiosborongeodynamics
原始语种摘要: Abstract(#br)New whole-rock B, Sr, Nd isotope ratios and 87 Sr/ 86 Sr on clinopyroxenes have been collected to study the enrichment of fluid mobile elements (FMEs) observed in Mt. Etna volcanics. Etna volcano, one of the most active in the world, is located in an extremely complex tectonic context at the boundary between colliding African and European plates. The analytical work focuses on current (1974–1998) and historic (1851–1971) eruptive activity, including some key prehistoric lavas, in order to interpret the secular shift of its geochemical signature to more alkaline compositions. Boron is used as a tool to unravel the role of fluids in the genesis of magmas, revealing far-reaching consequences, beyond the case study of Mt. Etna. Small variations are observed in δ 11 B (−3.5 to...
全文获取路径: Elsevier  (合作)
影响因子:4.349 (2012)

  • subduction 俯冲
  • fluid 
  • magma 岩浆
  • genesis 发生
  • ratios 遗传比率
  • isotopic 同位素置换
  • geochemical 地球化学的
  • mobile 可动的
  • clinopyroxene 斜辉石
  • enrichment 富集