Magnetotelluric imaging of the shallow-seated magma reservoir beneath the Karadağ stratovolcano, Central Anatolia, Turkey

The central Anatolian Volcanic Province encompasses many volcanoes elongated in a northeast-southwest direction. Karadağ is one of the dormant Quaternary stratovolcanoes of the region at the southern end of the province. We acquired broadband magnetotelluric (MT) data in the period range 0.0001–251 ...

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Bibliographic Details
Published in:Journal of volcanology and geothermal research 2022-07, Vol.427, p.107567, Article 107567
Main Authors: Başokur, Ahmet T., Koçyiğit, Ali, Hacıoğlu, Özlem, Arslan, Halil İbrahim, Meqbel, Naser
Format: Article
Language:English
Subjects:
Central Anatolia
Electrical resistivity
Hydrothermal system
Karadağ stratovolcano
Magma reservoir
Magnetotellurics
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Summary:The central Anatolian Volcanic Province encompasses many volcanoes elongated in a northeast-southwest direction. Karadağ is one of the dormant Quaternary stratovolcanoes of the region at the southern end of the province. We acquired broadband magnetotelluric (MT) data in the period range 0.0001–251 s at 124 locations to obtain a three-dimensional electrical resistivity model to identify the associated magmatic-hydrothermal system beneath the Karadağ stratovolcano. The resistivity model provides evidence for low resistivity anomalies that include (1) a near-surface localised low resistivity (~ 20 Ωm) zone situated directly beneath the crater centre that is interpreted to be lacustrine sediments of an extinct crater lake, (2) a shallow low resistivity (~ 10 Ωm) zone of probable hydrothermal alteration in the eastern part of the stratovolcano and (3) a deep and large zone of low resistivity (
ISSN:0377-0273
1872-6097
DOI:10.1016/j.jvolgeores.2022.107567