HR: 1340h
AN: V43E-1466    [Abstracts]
TI: ROBOVOLC: The Geochemical Package
AU: * Gurrieri, S
EM: s.gurrieri@pa.ingv.it
AF: Istituto Nazionale di Geofisica e Vulcanologia - Sezione di Palermo, Via Ugo La Malfa 153, Palermo, 90146 Italy
AU: Giudice, G
EM: g.giudice@pa.ingv.it
AF: Istituto Nazionale di Geofisica e Vulcanologia - Sezione di Palermo, Via Ugo La Malfa 153, Palermo, 90146 Italy
AU: Giammanco, S
EM: s.giammanco@pa.ingv.it
AF: Istituto Nazionale di Geofisica e Vulcanologia - Sezione di Palermo, Via Ugo La Malfa 153, Palermo, 90146 Italy
AU: Coltelli, M
AF: Istituto Nazionale di Geofisica e Vulcanologia - Sezione di Catania, Piazza Roma 2, Catania, 95123 Italy
AU: Muscato, G
AF: DIEES Universit… degli studi di Catania, Via A. Doria 6, Catania, 95125 Italy
AB: ROBOVOLC is a special designed robot equipped with different scientific packages to collect solid, liquid and gas samples and make several measurements. This project was developed to reduce the risks to researchers working in volcanic areas (Muscato G. et al., 2003). In particular, the geochemical package allows to collect some different typology of gas samples (dray gases, NaOH flask, acid condense) and perform some direct measurements (gas temperature, mass and energy release, dry gas/steam ratio). The gases from fumaroles are collected by a 1.2m heated probe in order to keep the robot away from the fumaroles. The gas temperature is measured by several thermocouples located in different part of the probe (on the top to measure the fumarolic temperature) and along the gas canalization in order to check the temperature decreasing. The first step in the sampling procedure consists of the thermal stabilization of the equipment. In this phase, the fumarolic gases flow inside the system for a variable period of time depending on the temperature and flux of the fumaroles. Dray gases and acid condense (Capasso et al., 1992) are collected after the fumarolic gas is cooled by a pyrex glass steam condenser. This stage allows to measure the volumes of both liquid and gas phase and, therefore, to calculate the gas/steam ratio. NaOH flask (Giggenbach, 1975) can be collected excluding the condensed by some electro valves. The gas flux inside the flask can be regulated by a motorized system and a video camera. All the gas canalization is made in pyrex glass and PTFE.
DE: 8419 Eruption monitoring (7280)
DE: 8494 Instruments and techniques
DE: 9805 Instruments useful in three or more fields
SC: Volcanology, Geochemistry, Petrology [V]
MN: 2004 AGU Fall Meeting