Muon imaging and monitoring at the Mont Terri underground rock laboratory, Switzerland. - INSU - Institut national des sciences de l'Univers Access content directly
Conference Poster Year : 2018

Muon imaging and monitoring at the Mont Terri underground rock laboratory, Switzerland.

Abstract

Imaging geological objects by quantifying the screening effect they have on the natural flux of cosmic muons is a powerful method that complements standard geophysical tools in the understanding of the Earth's subsurface. Radiographies of the average density of geological bodies along the muon paths can be retrieved from muon measurements, allowing to image large volumes of rock from a single observation point. Furthermore, continuous muon measurements allow us to monitor density variations in a geological object, by tracking the time changes in the outgoing flux of muons. The Mont Terri underground rock laboratory is located in the Jura Mountains range, at a depth of around 300 meters below the Earth's surface in north-western Switzerland. Its structural setting is dominated by an anticline of Triassic-Jurassic formations, whose spatial distribution is finely characterized given the numerous boreholes and outcrops studied inside and outside the tunnel. In this work we analyze 5 muon imaging experiences performed from inside the rock laboratory from 2013 to 2017. From this dataset we obtain corresponding muon radiographies of the average density between the tunnel and the surface of the Mont Terri site at extensive directions. Moreover, at one site the muon detector continuously recorded data for a whole year. We use these data to study the density variations due to changes on the rock's fluid saturation over time in different regions of the mountain. Finally, we perform a joint interpretation with complementary geological, meteorological and geophysical data from the site.

Domains

Earth Sciences
No file

Dates and versions

insu-01927794 , version 1 (20-11-2018)

Identifiers

  • HAL Id : insu-01927794 , version 1

Cite

Matias Tramontini, Marina Rosas-Carbajal, Jacques Marteau, Fabio Zyzerman, Bruno Carlus, et al.. Muon imaging and monitoring at the Mont Terri underground rock laboratory, Switzerland.. American Geophysical Union 2018, Fall Meeting, Dec 2018, Washington, United States. , pp.NS23B-0707, 2018. ⟨insu-01927794⟩
100 View
0 Download

Share

Gmail Facebook X LinkedIn More