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RESEARCH PRODUCT
An overview of the geochemical characteristics of oceanic carbonatites: New insights from Fuerteventura carbonatites (Canary islands)
Alessandra CorrealeGabriele CarnevaleSilvio G. RotoloAntonio CaracausiLaura Italianosubject
CalciteCape Verdelcsh:Mineralogylcsh:QE351-399.2010504 meteorology & atmospheric sciencesCape Verde Fuerteventura Noble gases isotopes Oceanic carbonatites Trace elementsnoble gases isotopesGeochemistrytrace elementsGeology010502 geochemistry & geophysicsGeotechnical Engineering and Engineering Geology01 natural sciencesLithospheric mantleMantle (geology)Cape verdeFuerteventurachemistry.chemical_compoundchemistryCarbonatiteoceanic carbonatitesGeology0105 earth and related environmental sciencesPetrogenesisdescription
The occurrence of carbonatites in oceanic settings is very rare if compared with their continental counterpart, having been reported only in Cape Verde and Canary Islands. This paper provides an overview of the main geochemical characteristics of oceanic carbonatites, around which many debates still exist regarding their petrogenesis. We present new data on trace elements in minerals and whole-rock, together with the first noble gases isotopic study (He, Ne, Ar) in apatite, calcite, and clinopyroxene from Fuerteventura carbonatites (Canary Islands). Trace elements show a similar trend as Cape Verde carbonatites, almost tracing the same patterns on multi-element and REE abundance diagrams. 3He/4He isotopic ratios of Fuerteventura carbonatites reflect a shallow (sub-continental lithospheric mantle, SCLM) He signature in their petrogenesis, and they clearly differ from Cape Verde carbonatites, i.e., fluids from a deep and low degassed mantle with a primitive plume-derived He signature are involved in their petrogenesis.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2021-02-15 |