| Title: |
Investigating hydrothermal alteration in Copahue volcano (Argentina/Chile) using muography and laboratory measurements on rock samples |
| Authors: |
Tramontini, Matias; Rosas-Carbajal, Marina; Zyserman, Fabio; Besson, Pascale; Marteau, Jacques; Heap, Michael |
| Contributors: |
Institut de Physique des 2 Infinis de Lyon (IP2I Lyon); Université Claude Bernard Lyon 1 (UCBL); Université de Lyon-Université de Lyon-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS); Institut de Physique du Globe de Paris (IPGP - UMR_7154); Institut national des sciences de l'Univers (INSU - CNRS)-Institut National de l'Information Géographique et Forestière IGN (IGN)-Université de La Réunion (UR)-Institut de Physique du Globe de Paris (IPG Paris)-Centre National de la Recherche Scientifique (CNRS)-Université Paris Cité (UPCité); Centre National de la Recherche Scientifique (CNRS); CONICET, Facultad de Ciencias Astronómicas y Geofı́sicas, Universidad Nacional de La Plata; Consejo Nacional de Investigaciones Científicas y Técnicas Buenos Aires (CONICET); Institut Terre Environnement Strasbourg (ITES); École Nationale du Génie de l'Eau et de l'Environnement de Strasbourg (ENGEES)-Université de Strasbourg (UNISTRA)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS); ANR-24-CE01-5839,COPHRE,Caractérisation et modélisation du déclenchement d'éruptions phréatiques récurrentes(2024) |
| Source: |
EGU Vienna ; https://hal.science/hal-05397600 ; EGU Vienna, Apr 2025, Vienna (Austria), Austria. ⟨10.5194/egusphere-egu24-6565⟩ |
| Publisher Information: |
CCSD |
| Publication Year: |
2025 |
| Subject Terms: |
[SDE]Environmental Sciences |
| Subject Geographic: |
Vienna (Austria); Austria |
| Description: |
International audience ; Muography is a non-invasive geophysical method that relies on the detection of muons, which are subatomic particles generated by the interaction of cosmic rays with the Earth's atmosphere. The physical quantity estimated by this method is the opacity, which represents the amount of matter traversed by muons along their trajectories, resulting in energy loss and scattering for the particles. Thus, absorption muography consists of deploying a muon detector targeting the volcano and registering the muons traversing it per unit of time and trajectory. From these data, radiographs of average density of extensive rock volumes can be obtained using a single measuring instrument and from a singular measurement position.Copahue volcano is located in the Andes mountain range and is considered the highest-risk volcano in Argentina due to its proximity to two towns situated within an 8 km radius of the volcano's crater. Additionally, the region attracts a significant number of tourists, leading to a substantial increase in the population of both localities. The latest eruptive cycle, initiated in 2012, has maintained a near-continuous state of activity, marked by ash emissions, crater explosions, and seismic activity. In this work, we study the hydrothermal alteration at Copahue volcano through a combination of muography and laboratory measurements of the chemical and physical properties of rock samples.The muography dataset was acquired by installing a muon detector on the eastern flank of Copahue volcano, situated at an altitude of approximately 2500 meters above sea level. For the laboratory analyses, we collected rock blocks with the objective of representing a diverse spectrum of alteration stages within Copahue volcano. Through this selection process, we captured variations in mineralogical composition, geochemical signatures, and physical properties that correspond to different stages of hydrothermal alteration. We carried out a series of examinations on the rock samples extracted from the ... |
| Document Type: |
conference object |
| Language: |
English |
| DOI: |
10.5194/egusphere-egu24-6565 |
| Availability: |
https://hal.science/hal-05397600; https://doi.org/10.5194/egusphere-egu24-6565 |
| Accession Number: |
edsbas.3F9B66F4 |
| Database: |
BASE |