Chemical and isotopic composition of geothermal discharges from the Puyehue-Cordón Caulle area (40.5°S), Southern Chile

Sepúlveda, Fabián; Dorsch, Klaus; Lahsen, Alfredo; Bender, Steffen; Palacios, Carlos

doi:10.1016/j.geothermics.2003.10.005

Cited by 31 publications

(20 citation statements)

References 15 publications

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“…The 2012-2015 inverted source depths are significantly deeper than the~3 km predicted for the volcano hydrothermal system [Sepulveda et al, 2004]; therefore, we suggest that much of the observed ground is of magmatic origin. In the absence of chemistry of gas/water discharges and microgravity measurements which provide constraints on density changes, directly related to either hydrothermal or magmatic processes, we solely rely on the source depth and unrest timescale to infer the deformation mechanism.…”

Section: Discussionmentioning

confidence: 47%

Rapid reinflation following the 2011–2012 rhyodacite eruption at Cordón Caulle volcano (Southern Andes) imaged by InSAR: Evidence for magma reservoir refill

Delgado

Pritchard

Basualto³

et al. 2016

Geophysical Research Letters

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Cordón Caulle is a large fissural volcano that has erupted rhyodacitic magma of the same composition in its past three historical eruptions in 1921, 1960, and 2011–2012. There was significant ground deformation observed before and during the 2011–2012 eruption—here we use C and X band interferometric synthetic aperture radar (InSAR) time series results to document posteruptive uplift up to 0.8 m between March 2012 and May 2015, with line‐of‐sight rates up to 45 cm/yr that have been largely aseismic, along with subsidence in the 2011–2012 lava flow. The 2012 uplift rate is one of the largest for silicic systems and was likely produced by the intrusion of ~0.125 km3 of magma in the same tectonically controlled plumbing system that has been active during the historical eruptions. Nevertheless, the uplift ended before the reservoir refilled with the erupted volume, maybe due to a change in the pressure gradient produced by the 2011–2012 eruption.

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Section: Discussionmentioning

confidence: 47%

Rapid reinflation following the 2011–2012 rhyodacite eruption at Cordón Caulle volcano (Southern Andes) imaged by InSAR: Evidence for magma reservoir refill

Delgado

Pritchard

Basualto³

et al. 2016

Geophysical Research Letters

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show abstract

“…they are high in SiO 2 , Na, and K). On the other hand, the acid water of the Zhenzhuquan spring is rich in SO 4 2− ; other studies (Aiuppa et al, 1997;Sepúlveda et al, 2004) have also revealed that low-pH geothermal waters usually present high concentrations of dissolved sulfates.…”

Section: Main Chemical Characteristics Of the Thermal Spring Watersmentioning

confidence: 94%

Geochemistry of the Rehai and Ruidian geothermal waters, Yunnan Province, China

Zhang

Liu

et al. 2008

Geothermics

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“…Mahon and Cusicanqui (1980) described a small geothermal field in northern Chile. Sepúlveda et al (2004) and Sepúlveda et al (2007) examined one of the largest active geothermal systems of Southern Chile.…”

Section: Previous Studiesmentioning

confidence: 99%