Noble gas magmatic signature of the Andean Northern Volcanic Zone from fluid inclusions in minerals

Alessandro Aiuppa, Joao Pedro Nogueira Lages, Bani, Silvana Hidalgo, C. Ian Schipper, Andrea Rizzo, Moussallam, Samaniego, Ceballos, Narváez, Aiuppa, Le Pennec, Andrea Luca Rizzo

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Trace volatile elements like He are key for understanding the mantle source signature of magmas and to better constrain the relative roles of subduction and crustal processes to the variability of along-arc chemical and isotopic signatures of magmatic fluids. Here we report on noble gas abundances and isotopic data of Fluid Inclusions (FIs) in eruptive products and/or fumarolic gases from the Colombia-Ecuador segment of Andean Northern Volcanic Zone (NVZ). FIs in olivine phenocrysts from Ecuador (El Reventador, Cotopaxi and Tungurahua) yield air-normalized corrected 3He/4He ratios of 7.0–7.4 RA, within the MORB range (8 ± 1 RA). With exception of the Cotopaxi lavas (opx <
Original languageEnglish
Pages (from-to)119966-
Number of pages16
JournalChemical Geology
Publication statusPublished - 2021

All Science Journal Classification (ASJC) codes

  • Geology
  • Geochemistry and Petrology

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