Volcanic lakes of the Azores archipelago (Portugal): Geological setting and geochemical characterization

Cruz, J. Virgílio; Antunes, P.; Amaral, C.; França, Zilda; Nunes, João Carlos

doi:10.1016/j.jvolgeores.2006.03.008

Cited by 50 publications

(31 citation statements)

References 29 publications

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“…The absence of melt under the Fogo edifice is confirmed by the lack of evidence of magmatic activity from geophysical and geochemical surveys [Cruz et al, 2006]. For example there is a general subsidence in the area [Jǿnsson A c c e p t e d M a n u s c r i p t et al, 1999] and a decrease of the fumarolic system intensity [Cruz , 2003].…”

Section: High Velocity Regionsmentioning

confidence: 97%

Seismic tomography of Central São Miguel, Azores

Zandomeneghi

Almendros

Ibáñez

et al. 2008

Physics of the Earth and Planetary Interiors

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Section: High Velocity Regionsmentioning

confidence: 97%

Seismic tomography of Central São Miguel, Azores

Zandomeneghi

Almendros

Ibáñez

et al. 2008

Physics of the Earth and Planetary Interiors

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“…Estimates of global CO 2 emission from volcanic lakes imply the need for a revision of the number of volcanic lakes on Earth for the following reasons: (1) the numbers listed in the literature (Delmelle and Bernard, 2000) differ signifi cantly from the real numbers in several volcanic regions (e.g., there are ~22 volcanic lakes in the Azores, but only three of these were listed by Delmelle and Bernard [2006]; see Cruz et al [2006]); (2) the lack of volcanic lakes in other volcanic regions listed by Delmelle and Bernard (2006) (e.g., the East African Rift Zone); and (3) the fact that many volcanoes host more than one volcanic lake (i.e., Rotorua in New Zealand). Therefore, a more complete revision of the potential number of volcanic lakes in the world has been done in this study.…”

Section: Introductionmentioning

confidence: 99%

Global CO2 emission from volcanic lakes

Pérez

Hernández

Padilla

et al. 2011

Geology

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The global CO 2 discharge from subaerial volcanism has been estimated at ~300 Mt yr -1 . However, estimates of CO 2 emissions from volcanic lakes have not been considered. In order to improve this information, extensive research on CO 2 emissions of volcanic lakes worldwide has been performed. The observed normalized average CO 2 emission rates increase from alkaline (5.5 t km -2 d -1 ), to neutral (201.2 t km -2 d -1 ), to acid (614.2 t km -2 d -1 ) in volcanic lakes. Taking into account (1) normalized CO 2 emission rates, (2) the number of volcanic lakes in the world (~769), and (3) the fraction and average areas of the investigated alkaline, neutral, and acid volcanic lakes, the estimated global CO 2 emission from volcanic lakes is 117 ± 19 Mt yr -1 , with 94 ± 17 Mt yr -1 as deep-seated CO 2 . This study highlights the importance of a revision of the actual global CO 2 discharge from subaerial volcanism. Printed in USAFigure 4. Probability plot of normalized CO 2 emission rates from studied volcanic lakes. P-population.on June 3, 2015 geology.gsapubs.org Downloaded from

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“…As well as eutrophication-oriented research, other studies have been completed regarding water chemistry in lakes all over the Azores islands focusing on the interaction with the active volcanic environment (Martini et al, 1994;Cruz et al, 2006;Antunes, 2008;Antunes et al, 2010;Andrade, 2014). Despite their volcanic origin and the fact that the referred water bodies are mainly located in active volcanoes they can be considered as no active lakes, generally presenting neutraldiluted waters and belonging to class 6 according to the classification scheme provided by Pasternak and Varekamp (1997) and adapted by Rouwet et al (2014).…”

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confidence: 99%