Flux of volatiles and ore-forming metals from the magmatic-hydrothermal system of Satsuma Iwojima volcano

Hedenquist, Jeffrey W.; Aoki, Masahiro; Shinohara, Hiroshi

doi:10.1130/0091-7613(1994)022<0585:fovaof>2.3.co;2

Cited by 141 publications

(63 citation statements)

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“…Alteration zones within thermal fields with discharging fumaroles and acid SO 4 -Cl waters are similar to other well-described crater zones like Vulcano (e.g., Fulignati et al, 1999) or Satsuma Iwojima (Hedenquist et al, 1994). It is mainly silicic alteration within fumarolic fields, the result of almost complete leaching by ultra-acid fluids.…”

Section: Volcanology Hydrogeology and Thermal Manifestationssupporting

confidence: 48%

“…The hydrothermal flux from a volcano-hydrothermal system may arise from the discharge of fluids formed at depth over the magma body and/or by acid waters which are formed by the absorption of the ascending volcanic vapor by shallow ground water (Giggenbach et al, 1990;Hedenquist et al, 1994;Rowe et al, 1995;Giggenbach, 1996;Taran and Peiffer, 2009, among others). The part of the anion composition (mainly Cl and SO 4 ) of the discharging thermal waters from a volcano-hydrothermal system that originates from the volcanic vapor should be taken into account in estimations of the magmatic volatile output and volatile recycling in subduction zones (Hedenquist et al, 1994;Taran, 2009;Shinohara, 2013). Another important application of the hydrothermal solute fluxes from volcanoes is a knowledge about the amount of the leached rock that is estimated from the cation components and silica in the discharging thermal waters.…”

Section: Introductionmentioning

confidence: 99%

“…The rate of the leaching (chemical erosion) is directly related to the stability of volcanic edifices (Lopez and Williams, 1993;Reid et al, 2001) and also plays an important role in the chemical balance of the ocean (Rad et al, 2007 and references therein). The metal volcano-hydrothermal flux also has implications for ore-forming processes (Hedenquist et al, 1994).…”

Section: Introductionmentioning

confidence: 99%

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Geochemistry and solute fluxes of volcano-hydrothermal systems of Shiashkotan, Kuril Islands

Kalacheva

Taran

Котенко

2015

Journal of Volcanology and Geothermal Research

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Shiashkotan Island belongs to the Northern Kuril island arc and consists of two joined volcanoes, Sinarka and Kuntomintar, with about 18 km of distance between the summits. Both volcanoes are active, with historic eruptions, and both emit fumarolic gases. Sinarka volcano is degassing through the extrusive dome with inaccessible strong and hot (N400°C) fumaroles. A large fumarolic field of the Kuntomintar volcano situated in a wide eroded caldera-like crater hosts many fumarolic vents with temperatures from boiling point to 480°C. Both volcanoes are characterized by intense hydrothermal activity discharging acid SO 4 -Cl waters, which are drained to the Sea of Okhotsk by streams. At least 4 groups of near-neutral Na-Mg-Ca-Cl-SO 4 springs with temperatures in the range of 50-80°C are located at the sea level, within tide zones and discharge slightly altered diluted seawater. Volcanic gas of Kuntomintar as well as all types of hydrothermal manifestations of both volcanoes were collected and analyzed for major and trace elements and water isotopes. Volcanic gases are typical for arc volcanoes with 3 He/ 4 He corrected for air contamination up to 6.4 R a (R a = 1.4 × 10 −6 , the air ratio) and δ 13 C (CO 2 ) within −10‰ to −8 ‰ VPDB. Using a saturation indices approach it is shown that acid volcanic waters are formed at a shallow level, whereas waters of the coastal springs are partially equilibrated with rocks at~180°C. Trace element distribution and concentrations and the total REE depend on the water type, acidity and Al + Fe concentration. The REE pattern for acidic waters is unusual but similar to that found in some acidic crater lake waters. The total hydrothermal discharge of Cl and S from the island associated with volcanic activity is estimated at ca. 20 t/d and 40 t/d, respectively, based on the measurements of flow rates of the draining streams and their chemistry. The chemical erosion of the island by surface and thermal waters is estimated at 27 and 140 ton/km 2 /year, respectively, which is 2-3 times lower than chemical erosion of tropical volcanic islands.

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Section: Volcanology Hydrogeology and Thermal Manifestationssupporting

confidence: 48%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Geochemistry and solute fluxes of volcano-hydrothermal systems of Shiashkotan, Kuril Islands

Kalacheva

Taran

Котенко

2015

Journal of Volcanology and Geothermal Research

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“…If κ = 2 × 10 −13 m 2 , an upper limit of macroscopic permeability at 1 km depth (e.g., Manning and Ingebritsen, 1999), is used, the liquid-phase flux is calculated to be 1 ∼ 6×10 3 ton/day that is one order smaller than H 2 O flux as the volcanic gases (2.2 × 10 4 ton/day; Hedenquist et al, 1994). If the permeability is ∼10 −14 (which may be more realistic), contribution of the flux J of meteoric water origin would be even smaller.…”

Section: Discussionmentioning

confidence: 99%

Self-potential anomaly of Satsuma-Iwojima volcano

Kanda

Mori

2014

Earth Planet Sp

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We conducted self-potential (SP) surveys twice at Satsuma-Iwojima volcano where an intense fumarolic activity continued for more than 1000 years from a summit crater of Iwodake, a lava dome of rhyolite. A positive anomaly of 200 ∼ 250 mV was detected on the Iwodake edifice, although the survey area was limited because of the steep topography and existence of high temperature fumaroles. The anomaly seems to be centered at the summit crater of Iwodake and can roughly be explained by a pair of conduction current source and sink located around the sea level beneath the summit crater. Depth of the current source might indicate the upper end of a liquid-phase water upflow zone, where the liquid-phase water vaporizes due to heat and depressurization. The above model does not explain the additional positive SP anomaly around the summit crater and on the western flank. The anomaly around the summit might be caused by suppression of meteoric water downflow by high temperature volcanic gases. The positive anomaly on the western flank might be caused by local fluid upflows associated with fumaroles on the flank.

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“…Iwodake is the high temperature over 880 • C (Shinohara et al, 1993). The chemical and isotopic compositions and fluxes of Satsuma-Iwojima's fumarolic gases and hot spring waters have been studied by many researchers (Iwasaki et al, 1962;Kamada, 1964;Matsuo et al, 1974;Shinohara et al, 1993;Hedenquist et al, 1994). The measurements at Satsuma-Iwojima were carried out on October 16, 1996.…”

Section: Measurements At Satsuma-iwojima Volcano Japanmentioning

confidence: 99%

High SiF4/HF ratio detected in Satsuma-Iwojima volcano’s plume by remote FT-IR observation

et al. 2014

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Remote FT-IR measurements of volcanic plume of Mt. Iwodake, Satsuma-Iwojima volcano, Japan, were carried out in October 1996 to understand plume chemistry of the volcano, especially characteristics of fluorine-bearing species in the plume. The SO 2 /HCl molar ratio in the plume was about 4, that is larger than the ratio in hightemperature gases. The high content of SO 2 is suggested to be caused by sulfur combustion in the crater. An average SiF 4 /HF molar ratio of 0.57 was observed for the plume, which is about one order of magnitude higher than the previously reported ratio. The result shows that SiF 4 is an important species and has similar to even larger contribution for fluorine output from Satsuma-Iwojima volcano than HF. The SiF 4 flux of Satsuma-Iwojima volcano is about 13 t/d, that is the largest SiF 4 flux from volcanoes in the world. The observed SiF 4 /HF ratio cannot be explained only by the high-temperature fumarolic composition of the volcano according to the thermodynamic calculations. The ratio can be explained if contribution of F-rich low-temperature fumaroles to the total gas flux of the volcano is as high as 40%.

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Flux of volatiles and ore-forming metals from the magmatic-hydrothermal system of Satsuma Iwojima volcano

Cited by 141 publications

References 0 publications

Geochemistry and solute fluxes of volcano-hydrothermal systems of Shiashkotan, Kuril Islands

Geochemistry and solute fluxes of volcano-hydrothermal systems of Shiashkotan, Kuril Islands

Self-potential anomaly of Satsuma-Iwojima volcano

High SiF4/HF ratio detected in Satsuma-Iwojima volcano’s plume by remote FT-IR observation

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