Universität zu Köln

Bragagni, Alessandro, Mastroianni, Filippo ORCID: 0000-0002-3707-309X, Muenker, Carsten, Conticelli, Sandro ORCID: 0000-0002-9204-0522 and Avanzinelli, Riccardo (2022). A carbon-rich lithospheric mantle as a source for the large CO2 emissions of Etna volcano (Italy). Geology, 50 (4). S. 486 - 491. BOULDER: GEOLOGICAL SOC AMER, INC. ISSN 1943-2682

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Abstract

Etna volcano in Italy releases an exceptional amount of CO2 (9083 t/day) and contributes to 10% of global volcanic emission. The reasons for its extreme CO2 degassing are not yet understood. Using high-precision high field strength element (HFSE) concentrations in magmas from volcanoes in southern Italy, we show that the high Nb/Ta of Etna (up to 26) reveals a mantle source affected by carbonatite metasomatism, which is likely responsible for the large CO2 fluxes. As observed at Etna, carbon-rich mantle domains influence CO2 degassing also outside of continental rifts and therefore play a fundamental role in explaining volcanic CO2 fluxes in different geodynamic settings. Collectively, our study demonstrates that HFSE ratios in magmatic rocks are viable tracers for volcanic carbon degassing that can be used to study present-day settings and, possibly, past emissions.

Item Type:	Journal Article
Creators:	Creators Email ORCID ORCID Put Code Bragagni, Alessandro UNSPECIFIED UNSPECIFIED UNSPECIFIED Mastroianni, Filippo UNSPECIFIED orcid.org/0000-0002-3707-309X UNSPECIFIED Muenker, Carsten UNSPECIFIED UNSPECIFIED UNSPECIFIED Conticelli, Sandro UNSPECIFIED orcid.org/0000-0002-9204-0522 UNSPECIFIED Avanzinelli, Riccardo UNSPECIFIED UNSPECIFIED UNSPECIFIED
URN:	urn:nbn:de:hbz:38-683184
DOI:	10.1130/G49510.1
Journal or Publication Title:	Geology
Volume:	50
Number:	4
Page Range:	S. 486 - 491
Date:	2022
Publisher:	GEOLOGICAL SOC AMER, INC
Place of Publication:	BOULDER
ISSN:	1943-2682
Language:	English
Faculty:	Unspecified
Divisions:	Unspecified
Subjects:	no entry
Uncontrolled Keywords:	Keywords Language MOUNT-ETNA; INTEGRATED MODEL; HYBLEAN PLATEAU; TRACE-ELEMENT; DEEP CARBON; METASOMATISM; CONSTRAINTS; BASALTS; NB/TA; ROCKS Multiple languages Geology Multiple languages
URI:	http://kups.ub.uni-koeln.de/id/eprint/68318