Geothermal Resource Mapping in Northern Botswana Inferred from Three-Dimensional Magnetotelluric Inversion
A set of magnetotelluric (MT) data collected from 28 stations at the Kasane Hot Spring in northern Botswana was used to derive a 3-D model of the electrical resistivity distribution around deep geologic structures that we associated with geothermal resources. The dimensionality analysis results reve...
| Main Authors: | , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
MDPI AG
2023-10-01
|
| Series: | Applied Sciences |
| Subjects: | |
| Online Access: | https://www.mdpi.com/2076-3417/13/20/11236 |
| _version_ | 1827629433580683264 |
|---|---|
| author | Calistus Ramotoroko Anneke Thiede Andreas Junge Elisha Shemang |
| author_facet | Calistus Ramotoroko Anneke Thiede Andreas Junge Elisha Shemang |
| author_sort | Calistus Ramotoroko |
| collection | DOAJ |
| description | A set of magnetotelluric (MT) data collected from 28 stations at the Kasane Hot Spring in northern Botswana was used to derive a 3-D model of the electrical resistivity distribution around deep geologic structures that we associated with geothermal resources. The dimensionality analysis results revealed that 3-D modeling should be used to determine the electrical structure. The resistivity models revealed a conductive layer with an average thickness of 200 m, representing the overlying sediments of the Proterozoic volcanic rocks. The thick high-resistivity zone (>100 Ωm) below the conductive layer can be associated with Mesoproterozoic bedrock. The MT measurements in this area show a tube-shaped conductive anomaly that could serve as a fluid pathway feeding the hot spring. A fracture-controlled meteoric fluid circulation presumably determines the existence of the Kasane Hot Spring system. |
| first_indexed | 2024-03-09T13:50:24Z |
| format | Article |
| id | doaj.art-b5c49677eec44cecbb43e3e2c65e7c93 |
| institution | Directory Open Access Journal |
| issn | 2076-3417 |
| language | English |
| last_indexed | 2024-03-09T13:50:24Z |
| publishDate | 2023-10-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Applied Sciences |
| spelling | doaj.art-b5c49677eec44cecbb43e3e2c65e7c932023-11-30T20:51:13ZengMDPI AGApplied Sciences2076-34172023-10-0113201123610.3390/app132011236Geothermal Resource Mapping in Northern Botswana Inferred from Three-Dimensional Magnetotelluric InversionCalistus Ramotoroko0Anneke Thiede1Andreas Junge2Elisha Shemang3Department of Earth and Environmental Sciences, Faculty of Science, Botswana International University of Science and Technology, Private Bag 16, Palapye 10071, BotswanaInstitute of Geophysics, University of Münster, Corrensstrasse 24, 48149 Munster, GermanyInstitute of Geoscience, Goethe University Frankfurt am Main, 60438 Frankfurt, GermanyDepartment of Earth and Environmental Sciences, Faculty of Science, Botswana International University of Science and Technology, Private Bag 16, Palapye 10071, BotswanaA set of magnetotelluric (MT) data collected from 28 stations at the Kasane Hot Spring in northern Botswana was used to derive a 3-D model of the electrical resistivity distribution around deep geologic structures that we associated with geothermal resources. The dimensionality analysis results revealed that 3-D modeling should be used to determine the electrical structure. The resistivity models revealed a conductive layer with an average thickness of 200 m, representing the overlying sediments of the Proterozoic volcanic rocks. The thick high-resistivity zone (>100 Ωm) below the conductive layer can be associated with Mesoproterozoic bedrock. The MT measurements in this area show a tube-shaped conductive anomaly that could serve as a fluid pathway feeding the hot spring. A fracture-controlled meteoric fluid circulation presumably determines the existence of the Kasane Hot Spring system.https://www.mdpi.com/2076-3417/13/20/11236magnetotelluricGhanzi-Chobe Belt3-D MT inversionresistivitygeothermalKasane |
| spellingShingle | Calistus Ramotoroko Anneke Thiede Andreas Junge Elisha Shemang Geothermal Resource Mapping in Northern Botswana Inferred from Three-Dimensional Magnetotelluric Inversion Applied Sciences magnetotelluric Ghanzi-Chobe Belt 3-D MT inversion resistivity geothermal Kasane |
| title | Geothermal Resource Mapping in Northern Botswana Inferred from Three-Dimensional Magnetotelluric Inversion |
| title_full | Geothermal Resource Mapping in Northern Botswana Inferred from Three-Dimensional Magnetotelluric Inversion |
| title_fullStr | Geothermal Resource Mapping in Northern Botswana Inferred from Three-Dimensional Magnetotelluric Inversion |
| title_full_unstemmed | Geothermal Resource Mapping in Northern Botswana Inferred from Three-Dimensional Magnetotelluric Inversion |
| title_short | Geothermal Resource Mapping in Northern Botswana Inferred from Three-Dimensional Magnetotelluric Inversion |
| title_sort | geothermal resource mapping in northern botswana inferred from three dimensional magnetotelluric inversion |
| topic | magnetotelluric Ghanzi-Chobe Belt 3-D MT inversion resistivity geothermal Kasane |
| url | https://www.mdpi.com/2076-3417/13/20/11236 |
| work_keys_str_mv | AT calistusramotoroko geothermalresourcemappinginnorthernbotswanainferredfromthreedimensionalmagnetotelluricinversion AT annekethiede geothermalresourcemappinginnorthernbotswanainferredfromthreedimensionalmagnetotelluricinversion AT andreasjunge geothermalresourcemappinginnorthernbotswanainferredfromthreedimensionalmagnetotelluricinversion AT elishashemang geothermalresourcemappinginnorthernbotswanainferredfromthreedimensionalmagnetotelluricinversion |