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Exploring High Temperature reservoirs: new challenges for geothermal energy - Volterra, Italy, Workshop2
Exploring High Temperature reservoirs: new challenges for geothermal energy - Volterra, Italy, Workshop2
1-4 April 2007 Volterra, Tuscany, Italy
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The geothermal potential of continental Yemen: new geochemical and isotopic insights from thermal water and gas discharges
 
Most thermal springs of continental Yemen, fumaroles and boiling water pools have
been sampled and analyzed for chemical and isotopic compositions in liquid and
associated free-gas phases. Whatever the emergence, all the water discharges have an
isotopic signature of meteoric origin. Springs discharging in the central volcanic
plateau show a prevalent Na-HCO3-composition, clearly affected by an anomalous flux
of CO2 likely related to active hydrothermal systems located in the Jurassic Amran
Group limestone sequence that underlies the 2000-3000 m thick volcanic suite and/or
the Cretaceous Tawilah Group sandstone. Although organic CO2 contribution from
meteoric recharge waters, at least at limited extent, cannot be ruled out, all the
CO2-rich gas samples have a 13C-CO2 signature that falls in the range of mantle CO2
(-3<13C<-7 ‰ V-PDB). The relatively high 3He/4He (1
                                        
 
Id: 24
Place: Volterra, Tuscany, Italy
Campus SIAF, SP del Monte Volterrano
Localita' Il Cipresso
Volterra, Italy
Starting date:
02-Apr-2007   14:56
Duration: 03'
Primary Authors: Prof. MINISSALE, Angelo (CNR - Institute of Geosciences & Earth Resources, Via La Pira 4 – 50121 Firenze (Italy))
Co-Authors: Dr. MATTASH, M.A. (Ministry of Oil and Mineral Resources Board, Geological Survey & Minerals Resources Board, P.O. Box 297, Sana’a (Yemen))
Dr. HAZZAE, M.K. (Ministry of Oil and Mineral Resources Board, Geological Survey & Minerals Resources Board, P.O. Box 297, Sana’a (Yemen))
Prof. VASELLI, Orlando (Dept. Earth Sciences, Via La Pira 4 – 50121 Firenze (Italy))
Dr. TASSI, Franco (Dept. Earth Sciences, Via La Pira 4 – 50121 Firenze (Italy))
Dr. AL-GANAD, I.N. (Ministry of Oil and Mineral Resources Board, Geological Survey & Minerals Resources Board, P.O. Box 297, Sana’a (Yemen))
Dr. SELMO, E. (Dept. Earth Sciences, Parco Area delle Scienze 157A – 43100 Parma (Italy))
Dr. SHAWKI, M.N. (Dept. Geology, University of Ta’iz, P.O. Box 5679, Ta’iz (Yemen))
Prof. TEDESCO, Dario (Dept. Environmental Sciences, Via Vivaldi 43 - 81100 Caserta (Italy))
Prof. POREDA, Robert (Dept. Earth & Environmental Sciences, 227 Hutchinson Hall, Rochester, NY 14627 (U.S.A.))
Dr. AD-DUKHAIN, A.M. (Ministry of Oil and Mineral Resources Board, Geological Survey & Minerals Resources Board, P.O. Box 297, Sana’a (Yemen))
Presenters: Dr. TASSI, Franco
Material: slides Slides
poster Poster
 




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