Structure of the Nemrut caldera (Eastern Anatolia, Turkey) and associated hydrothermal fluid circulation

Ulusoy, İ̇̇nan; Labazuy, Philippe; Aydar, Erkan; Ersoy, Orkun; Çubukçu, H. Evren

doi:10.1016/j.jvolgeores.2008.02.012

Cited by 28 publications

(25 citation statements)

References 28 publications

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“…This conceptual scheme serves to interpret the self-potential signal encountered in a wide variety of volcanic systems, where it is very usual to find W-shaped anomalies centered at volcanic edifices which sustain active hydrothermal systems (Nishida and Tomiya, 1987;Matsushima et al, 1990;Nishida et al, 1996;Michel and Zlotnicki, 1998;Zlotnicki et al, 1998Zlotnicki et al, , 2008Ishido and Pritchett, 1999;Finizola et al, 2002Finizola et al, , 2003Finizola et al, , 2006Kanda and Mori, 2002;Ishido, 2004;Aizawa et al, 2005;Hase et al, 2005;Ulusoy et al, 2008;Richards et al, 2010;Bennati et al, 2011). The positive anomalies over the edifices are created by the ascending hydrothermal hot fluids, while far away from the volcano summit a negative correlation between topography and selfpotential is observed in the hydrogeological zone.…”

Section: Self-potential Methodsmentioning

confidence: 99%

Hydrothermal system of Central Tenerife Volcanic Complex, Canary Islands (Spain), inferred from self-potential measurements

Villasante-Marcos¹,

Finizola²,

Abella³

et al. 2014

Journal of Volcanology and Geothermal Research

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a b s t r a c tAn extensive self-potential survey was carried out in the central volcanic complex of Tenerife Island (Canary Islands, Spain). A total amount of ~237 km of profiles with 20 m spacing between measurements was completed, including radial profiles extending from the summits of Teide and Pico Viejo, and circular profiles inside and around Las Cañadas caldera and the northern slopes of Teide and Pico Viejo. One of the main results of this map-ping is the detection of well-developed hydrothermal systems within the edifices of Teide and Pico Viejo, and also associated with the flank satellite M. Blanca and M. Rajada volcanoes. A strong structural control of the surface manifestation of these hydrothermal systems is deduced from the data, pointing to the subdivision of Teide and Pico Viejo hydrothermal systems in three zones: summit crater, upper and lower hydrothermal systems. Self-potential maxima related to hydrothermal activity are absent from the proximal parts of the NE and NW rift zones as well as from at least two of the mafic historical eruptions (Chinyero and Siete Fuentes), indicating that long-lived hydrothermal systems have developed exclusively over relatively shallow felsic magma reser-voirs. Towards Las Cañadas caldera floor and walls, the influence of the central hydrothermal systems disappears and the self-potential signal is controlled by the topography, the distance to the water table of Las Cañadas aqui-fer and its geometry. Nevertheless, fossil or remanent hydrothermal activity at some points along the Caldera wall, especially around the Roques de García area, is also suggested by the data. Self-potential data indicate the existence of independent groundwater systems in the three calderas of Ucanca, Guajara and Diego Hernández, with a funnel shaped negative anomaly in the Diego Hernández caldera floor related to the subsurface topogra-phy of the caldera bottom. Two other important self-potential features are detected: positive values towards the northwestern Santiago rift, possibly due to the relatively high altitude of the water-table in this area; and a linear set of minima to the west of Pico Viejo, aligned with the northwestern rift and related to meteoric water infiltra-tion along its fracture system.

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Section: Self-potential Methodsmentioning

confidence: 99%

Hydrothermal system of Central Tenerife Volcanic Complex, Canary Islands (Spain), inferred from self-potential measurements

Villasante-Marcos¹,

Finizola²,

Abella³

et al. 2014

Journal of Volcanology and Geothermal Research

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show abstract

“…En outre, des témoignages d'archives indiquent que le Nemrut a été actif jusqu'à la période historique (Oswald, 1912 ;Karakhanian et al, 2002 ;Aydar et al, 2003). Cependant, à l'exception du Nemrut qui a été relativement bien étudié ces dernières années (Aydar et al, 2003;Karaoğlu et al, 2005;Özdemir et al, 2006;Çubukçu, 2008;Ulusoy et al, 2008), les autres volcans sont beaucoup moins connus.…”

Section: Activité Volcaniqueunclassified

The pyroclastites around southwestern part of Van Lake (eastern Anatolia, Turquey): implications on the regional palaeohydrography

Mouralis¹,

Kuzucuoğlu²,

Akköprü³

et al. 2010

quaternaire

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“…Near the northern rim there is another lake with hot springs (~60°C, Ulusoy et al, 2008) and fumarolic activity (Fig. 1: Ilığ lake, Nagao et al, 1989;Kipfer et al, 1994;Güleç et al 2002;Ulusoy et al, 2008;Mutlu et al, 2012); the maximum depth of this lake is 11 m. The eastern half of the caldera is filled by pyroclastic deposits associated with maars, lava domes and flows. Ulusoy et al (2008) proposed that the caldera consists of three main blocks and has collapsed in a piecemeal manner.…”

Section: Introductionmentioning

confidence: 99%

“…1: Ilığ lake, Nagao et al, 1989;Kipfer et al, 1994;Güleç et al 2002;Ulusoy et al, 2008;Mutlu et al, 2012); the maximum depth of this lake is 11 m. The eastern half of the caldera is filled by pyroclastic deposits associated with maars, lava domes and flows. Ulusoy et al (2008) proposed that the caldera consists of three main blocks and has collapsed in a piecemeal manner. One of these three blocks -the one forming the western floor of the caldera -is 140 m lower in altitude than the two eastern blocks and this depression is filled with Nemrut Lake.…”

Section: Introductionmentioning

confidence: 99%

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Volcanological evolution and caldera forming eruptions of Mt. Nemrut (Eastern Turkey)

Ulusoy

Çubukçu

Aydar

et al. 2012

Journal of Volcanology and Geothermal Research

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Structure of the Nemrut caldera (Eastern Anatolia, Turkey) and associated hydrothermal fluid circulation

Cited by 28 publications

References 28 publications

Hydrothermal system of Central Tenerife Volcanic Complex, Canary Islands (Spain), inferred from self-potential measurements

Hydrothermal system of Central Tenerife Volcanic Complex, Canary Islands (Spain), inferred from self-potential measurements

The pyroclastites around southwestern part of Van Lake (eastern Anatolia, Turquey): implications on the regional palaeohydrography

Volcanological evolution and caldera forming eruptions of Mt. Nemrut (Eastern Turkey)

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