Dissolution-reprecipitation zoning in dolomite crystals partially resorbed by calcite, from an UHP marble of the western Alps.

Origin, transfer, fixation and outgassing of carbon in active orogenic systems

PRODUZIONE, TRASPORTO, FISSAZIONE E DEGASSAMENTO DI CARBONIO IN SISTEMI OROGENICI ATTIVI

Petrography, Petrology e Metallogenesis

Staff

Rolfo Franco (Member)
Groppo Chiara Teresa (Manager)
Ferrando Simona (Member)
Castelli Daniele (Member)

Contacts

ERC Sectors

PE10_10 - Mineralogy, petrology, igneous petrology, metamorphic petrology

PE10_11 - Geochemistry, cosmochemistry, crystal chemistry, isotope geochemistry, thermodynamics

Activity

Active orogenic belts (such as the Himalaya, the Alps and the Appennines) are able to produce significant amounts of CO2, similar to those measured at surface in volcanic systems. However, the processes controlling the production, transfer, fixation and outgassing of these carbon-bearing fluids from the Earth’s crust to the surface are still poorly understood. This research aims at investigating the processes of carbon production, transfer, fixation and outgassing in different active collisional settings, and correlate the estimated carbon fluxes with those measured at surface from springs and/or gaseous discharges. The study focuses on two different orogenic belts: the “small and cold” Alpine orogen and the “large and hot” Himalayan orogen.

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Main Collaboration

Maria Luce Frezzotti (Università Milano Bicocca)
Frédéric Girault, Frèdéric Perrier (IPGP, Parigi)

Publications

Ferrando S., Petrelli M., Frezzotti M.L. (2019). Gradual and selective trace-element enrichments in slab-released fluids at sub-arc depths. Scientific Reports, 9, 16393. DOI: 10.1038/s41598-019-52755-9
Girault F., Adhikari L.B., France-Lanord C., Agrinier P., Koirala B., Bhattarai M., Mahat S., Groppo C., Rolfo F., Bollinger L., Perrier F. (2018): Persistent CO2 emissions and hydrothermal unrest following the 2015 earthquake in Nepal. Nature Communications, 9, 2956.
Rapa G. Groppo C., Rolfo F., Petrelli M., Mosca P. Perugini D. (2017). Titanite-bearing calc-silicate rocks constrain timing, duration and magnitude of metamorphic CO2 degassing in the Himalayan belt. Lithos, 292–293, 364–378.
Groppo C., Rolfo F., Castelli D., Mosca P. (2017). Metamorphic CO2 production in collisional orogens: petrologic constraints from phase diagram modeling of Himalayan, scapolite-bearing, calc-silicate rocks in the NKC(F)MAS(T)-HC system. Journal of Petrology, 58, 53-83.
Ferrando S., Groppo C., Frezzotti M.L., Castelli D., Proyer A. (2017). Dissolving dolomite in a stable UHP mineral assemblage: evidence from Cal-Dol marbles of the Dora-Maira Massif (Italian Western Alps). American Mineralogist, 102, 42-60.

Progetti legati alla ricerca

PRIN2017 Project - n.2017LMNLAW: "Carbon cycling and Earth control on the livable planet: connecting deep key carbon sources to surface CO2 degassing by transfer processes"

https://prin2017.wixsite.com/connectforcarbon

Tag: Origin, transfer and outgassing of carbon; Collisional orogens; carbon fluxes