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GEOREF RECORD

Evidence of temperature increase of CO (sub 2) -bearing fluids from Aluto-Langano geothermal field (Ethiopia); a fluid inclusions study of deep wells LA-3 and LA-6

Aldo Valori, Meseret Teklemariam and Giovanni Gianelli
Evidence of temperature increase of CO (sub 2) -bearing fluids from Aluto-Langano geothermal field (Ethiopia); a fluid inclusions study of deep wells LA-3 and LA-6 (in Proceedings of the Eleventh European symposium on Fluid inclusions research (ECROFI XI), Benedetto De Vivo (editor) and Pierfranco Lattanzi (editor))
European Journal of Mineralogy (October 1992) 4 (5): 907-919

Abstract

This geothermal field is located within one of the most active volcanic areas of the main Ethiopian rift system. Exploratory drilling has revealed the existence of high T (approx 335 degrees C) two-phase fluids at Aluto. This study is focused on two wells situated on the main upflow zone of the geothermal system. The presence of minerals such as calcite, chlorite, hematite, illite, quartz, sphene, epidote, garnet, prehnite, biotite and actinolite indicate a water-rock interaction of high intensity. Seven samples were selected from different depths for petrographic observation, microthermometry and crushing experiments. The evidence from the study demonstrates heating up of the system from approx 250 degrees C to the present-day T of 320-335 degrees C. This heating could be explained by an intake of high enthalpy fluid in the upflow of the system.


ISSN: 0935-1221
Serial Title: European Journal of Mineralogy
Serial Volume: 4
Serial Issue: 5
Title: Evidence of temperature increase of CO (sub 2) -bearing fluids from Aluto-Langano geothermal field (Ethiopia); a fluid inclusions study of deep wells LA-3 and LA-6
Title: Proceedings of the Eleventh European symposium on Fluid inclusions research (ECROFI XI)
Author(s): Valori, AldoTeklemariam, MeseretGianelli, Giovanni
Author(s): De Vivo, Benedettoeditor
Author(s): Lattanzi, Pierfrancoeditor
Affiliation: CNR, Istituto Internazionale per le Ricerche Geotermiche, Pisa, Italy
Affiliation: Dipartimento di Geofisica e Vulcanologia, Naples, Italy
Pages: 907-919
Published: 199210
Text Language: English
Publisher: Schweizerbart'sche Verlagsbuchhandlung (Naegele u. Obermiller), Stuttgart, Federal Republic of Germany
Meeting name: Eleventh European symposium on Fluid inclusion research
Meeting location: Florence, ITA, Italy
Meeting date: 19910410April 10-12, 1991
References: 25
Accession Number: 1995-056271
Categories: Economic geology, geology of energy sources
Document Type: Serial Conference document
Bibliographic Level: Analytic
Illustration Description: illus. incl. 2 tables, geol. sketch maps
N03°25'00" - N18°00'00", E33°00'00" - E48°00'00"
Secondary Affiliation: Universita di Firenze, ITA, ItalyEthiopian Institute of Geological Survey, ETH, Ethiopia
Country of Publication: Germany
Secondary Affiliation: GeoRef, Copyright 2017, American Geosciences Institute. Reference includes data from Mineralogical Abstracts, United KingdomTwickenhamUKUnited Kingdom
Update Code: 199520
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