Appraising Mahallat Geothermal Region using thermal surveying data accompanied by the geological, geochemical and gravity analyses

Abstract Mahallat Geothermal Region, located in the central part of Iran, is known as one of the largest low-temperature geothermal fields. In this study, Mahallat geothermal resource has been evaluated based on integrated geological, geochemical and geophysical analyses. Gravity data revealed three...

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Autores principales:	Javad Nouraliee, Davar Ebrahimi, Ali Dashti, Maziar Gholami Korzani, Sepehr Sangin
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2021
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/48f37373664c44e3818e19e2a846119d
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spelling	oai:doaj.org-article:48f37373664c44e3818e19e2a846119d2021-12-02T17:47:18ZAppraising Mahallat Geothermal Region using thermal surveying data accompanied by the geological, geochemical and gravity analyses10.1038/s41598-021-90866-42045-2322https://doaj.org/article/48f37373664c44e3818e19e2a846119d2021-06-01T00:00:00Zhttps://doi.org/10.1038/s41598-021-90866-4https://doaj.org/toc/2045-2322Abstract Mahallat Geothermal Region, located in the central part of Iran, is known as one of the largest low-temperature geothermal fields. In this study, Mahallat geothermal resource has been evaluated based on integrated geological, geochemical and geophysical analyses. Gravity data revealed three major negative anomaly zones. Based on the geochemical analyses, quartz geothermometers are more reliable than others and confirmed that the reservoir is about 90 °C. Lithological properties of Jurassic layers and high sulphate content observed in geochemical data showed traces of the coal-rich layers on the hot fluids. Measured temperatures in 7 boreholes with the depths ranging from 50 to 100 m, have proposed that expected geothermal gradient will be about 81.5 °C/km. Among all drilled boreholes, the data coming from only one resulted in this almost reliable gradient. Other boreholes are clearly too shallow or affected by upflow or downflow of water along existing faults. Geological, geochemical, gravity and measurements of drilled boreholes suggested the existence of a shallow reservoir with an approximate temperature of 90 °C. Regarding gravity and observed faults, geothermal reservoir is elongated parallel to one of the main faults of the region with NE-SW strike.Javad NouralieeDavar EbrahimiAli DashtiMaziar Gholami KorzaniSepehr SanginNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 11, Iss 1, Pp 1-14 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Javad Nouraliee Davar Ebrahimi Ali Dashti Maziar Gholami Korzani Sepehr Sangin Appraising Mahallat Geothermal Region using thermal surveying data accompanied by the geological, geochemical and gravity analyses
description	Abstract Mahallat Geothermal Region, located in the central part of Iran, is known as one of the largest low-temperature geothermal fields. In this study, Mahallat geothermal resource has been evaluated based on integrated geological, geochemical and geophysical analyses. Gravity data revealed three major negative anomaly zones. Based on the geochemical analyses, quartz geothermometers are more reliable than others and confirmed that the reservoir is about 90 °C. Lithological properties of Jurassic layers and high sulphate content observed in geochemical data showed traces of the coal-rich layers on the hot fluids. Measured temperatures in 7 boreholes with the depths ranging from 50 to 100 m, have proposed that expected geothermal gradient will be about 81.5 °C/km. Among all drilled boreholes, the data coming from only one resulted in this almost reliable gradient. Other boreholes are clearly too shallow or affected by upflow or downflow of water along existing faults. Geological, geochemical, gravity and measurements of drilled boreholes suggested the existence of a shallow reservoir with an approximate temperature of 90 °C. Regarding gravity and observed faults, geothermal reservoir is elongated parallel to one of the main faults of the region with NE-SW strike.
format	article
author	Javad Nouraliee Davar Ebrahimi Ali Dashti Maziar Gholami Korzani Sepehr Sangin
author_facet	Javad Nouraliee Davar Ebrahimi Ali Dashti Maziar Gholami Korzani Sepehr Sangin
author_sort	Javad Nouraliee
title	Appraising Mahallat Geothermal Region using thermal surveying data accompanied by the geological, geochemical and gravity analyses
title_short	Appraising Mahallat Geothermal Region using thermal surveying data accompanied by the geological, geochemical and gravity analyses
title_full	Appraising Mahallat Geothermal Region using thermal surveying data accompanied by the geological, geochemical and gravity analyses
title_fullStr	Appraising Mahallat Geothermal Region using thermal surveying data accompanied by the geological, geochemical and gravity analyses
title_full_unstemmed	Appraising Mahallat Geothermal Region using thermal surveying data accompanied by the geological, geochemical and gravity analyses
title_sort	appraising mahallat geothermal region using thermal surveying data accompanied by the geological, geochemical and gravity analyses
publisher	Nature Portfolio
publishDate	2021
url	https://doaj.org/article/48f37373664c44e3818e19e2a846119d
work_keys_str_mv	AT javadnouraliee appraisingmahallatgeothermalregionusingthermalsurveyingdataaccompaniedbythegeologicalgeochemicalandgravityanalyses AT davarebrahimi appraisingmahallatgeothermalregionusingthermalsurveyingdataaccompaniedbythegeologicalgeochemicalandgravityanalyses AT alidashti appraisingmahallatgeothermalregionusingthermalsurveyingdataaccompaniedbythegeologicalgeochemicalandgravityanalyses AT maziargholamikorzani appraisingmahallatgeothermalregionusingthermalsurveyingdataaccompaniedbythegeologicalgeochemicalandgravityanalyses AT sepehrsangin appraisingmahallatgeothermalregionusingthermalsurveyingdataaccompaniedbythegeologicalgeochemicalandgravityanalyses
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Appraising Mahallat Geothermal Region using thermal surveying data accompanied by the geological, geochemical and gravity analyses

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