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European Laboratory Volcanoes : Piton de la Fournaise. Definition of the fine structure and the plumbing system aimed at eruption prediction, hazard assessment and eruptive mechanism understandings

Objective

The main purpose of the project is the definition of the volcano
internal structure and the feeding system aimed at a better
understanding of the eruptive mechanism in order to provide a
substantial improvement in the eruption prediction.


To provide information concerning reconstruction of eruptive
history of Piton de la Fournaise radioisotopic datations,
isotopic geochemistry, and geophysical analysis will be carried
out.

The study of volatiles in magma will be carried through analyses
of abundance and degassing of S, Cl, F, H2O, using nuclear and
electron microprobe, concentration and degassing of CO2 and
H2O using mass spectrometry and infrared spectrometry, optic
microthermometry; isotopic ratio of C.

Volatile emissions during and after the eruption will be analyzed
in terms of SO2 flux (UV spectrometry), radioactive and non
radioactive aerosol; He concentration and 3He/4He
evolution, degassing of CO2, He, Rn in the fractures

Interaction between volatiles and phreatic system will be studied
in tems of water and melt gases physical and chemical parameters,
chemical and isotopic contents of thermal water.

Magmatic intrusions, soil deformation and instability will be
studied by microgravimetry and geotechnical measurements.

Tectonic structures and hydrodynamic model they will be
established out by analysis of electric and geomagnetic
measurements.

This project is expected to result in a reconstruction of last
30.000 years of the volcano, a description of the feeding system,
the determination of the geochemical budget of the total output
of volatile emissions, and the definition of fine structures and
eruption mechanism of the plumbing system.

The findings will be applied not only at Piton de la Fournaise
but also at other volcanoes of the same type.

Funding Scheme

CSC - Cost-sharing contracts

Coordinator

Institut de Physique du Globe de Paris
Address
4 Place Jussieu
75252 Paris
France

Participants (4)

UNIVERSITA DEGLI STUDI DI NAPOLI FEDERICO II
Italy
Address
20,Complesso Universitario Di Monte Sangelo, Via Cint
80126 Napoli
UNIVERSITY OF EDINBURGH
United Kingdom
Address
West Mains Road Kings Buildings
EH9 3JW Edinburgh
Universidade de Lisboa
Portugal
Address
58,Rua Da Escola Politecnica
1200 Lisboa
Université de Paris VI (Université Pierre et Marie Curie)
France
Address
4 Place Jussieu
75252 Paris