Helium and argon isotope systematics of the central Lau Basin and Valu Fa Ridge: Evidence of crust/mantle interactions in a back-arc basin

Hilton, David R.; Hammerschmidt, Konrad; Loock, G.; Friedrichsen, Hans

doi:10.1016/0016-7037(93)90392-a

Cited by 148 publications

(107 citation statements)

References 71 publications

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“…He is more soluble in basaltic magma than Ar (S He /S Ar ~ 9.5; Jambon et al, 1986) (Fig. 6a), suggesting that crustal contamination had a negligible effect on He (Hilton et al, 1993;Hilton et al, 1995;Macpherson et al, 1998;Macpherson et al, 2005). Therefore, in the Kolbeinsey and Tjörnes glasses, 4 He/ 40 Ar * should reflect only the effects of degassing.…”

Section: Evolution Of Vesicle Gasmentioning

confidence: 96%

Sources, degassing, and contamination of CO2, H2O, He, Ne, and Ar in basaltic glasses from Kolbeinsey Ridge, North Atlantic

Macpherson

Hilton

Mertz

et al. 2005

Geochimica et Cosmochimica Acta

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The full-text may be used and/or reproduced, and given to third parties in any format or medium, without prior permission or charge, for personal research or study, educational, or not-for-pro t purposes provided that:• a full bibliographic reference is made to the original source • a link is made to the metadata record in DRO • the full-text is not changed in any way The full-text must not be sold in any format or medium without the formal permission of the copyright holders.Please consult the full DRO policy for further details.

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Section: Evolution Of Vesicle Gasmentioning

confidence: 96%

Sources, degassing, and contamination of CO2, H2O, He, Ne, and Ar in basaltic glasses from Kolbeinsey Ridge, North Atlantic

Macpherson

Hilton

Mertz

et al. 2005

Geochimica et Cosmochimica Acta

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“…Short crush times were employed to help avoid the release of extraneous He contained in crystal lattice sites [14]. Gas liberated by crushing was expanded into a stainless steel preparation line.…”

Section: Analytical Techniquesmentioning

confidence: 99%

“…He loss renders residual He in melts more susceptible to recording contamination [14,32,49]. Since Icelandic crust is a significant reservoir of radiogenic helium [42] it is important to constrain the effect that degassing/contamination may have had on the primary 3 He/ 4 He of melts before determining the origin of 3 He/ 4 He variation in the mantle.…”

Section: Helium -Oxygen Isotope Relationships and Early (Pre-eruptivementioning

confidence: 99%

High-3He/4He, depleted mantle and low-δ18O, recycled oceanic lithosphere in the source of central Iceland magmatism

Macpherson

Hilton

Day

et al. 2005

Earth and Planetary Science Letters

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'High-3He/4He, depleted mantle and low-18O, recycled oceanic lithosphere in the source of central Iceland magmatism.', Earth and planetary science letters., 233 (3-4). pp. 411-427. Further information on publisher's website:http://dx.doi.org/10. 1016/j.epsl.2005.02.037 Publisher's copyright statement:Additional information: Use policyThe full-text may be used and/or reproduced, and given to third parties in any format or medium, without prior permission or charge, for personal research or study, educational, or not-for-pro t purposes provided that:• a full bibliographic reference is made to the original source • a link is made to the metadata record in DRO • the full-text is not changed in any way The full-text must not be sold in any format or medium without the formal permission of the copyright holders.Please consult the full DRO policy for further details.

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“…We measured high 3 He/ 4 He ratios for high temperature fumaroles (>800°C), slightly above 8 Ra which coincides with the widely accepted MORB value of 8 ± 1 Ra (Hilton et al, 1993a;Ozima, 1994;Farley and Neroda, 1998 and references included). Compared to other Japanese volcanic systems, they correspond to the upper range of the values measured for this subduction-related volcanic zone (Nagao et al, 1981;Sano and Wakita, 1985;Marty et al, 1989).…”

Section: Resultsmentioning

confidence: 82%

Helium isotopes at Satsuma-Iwojima volcano, Japan.

2002

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We present isotopic analyses of helium in fluids collected during two field trips at Satsuma-Iwojima and Shin-Iwojima islands in November 1998 and October 2000. These are the first reported helium measurements at Shin-Iwojima. Copper tubes tightly closed by clamps at both ends were used to sample 1) gases from high and low temperature fumaroles in the summit area of Iwodake cone, 2) gases from a fumarole on Shin-Iwojima, 3) gas bubbling from the sea-floor along Shin-Iwojima where an increasing bubbling intensity was observed between 1998 and 2000, 4) waters from Sakamoto and Higashi hot springs. For gas samples, two types of correction for atmospheric contamination are discussed, using either the neon concentration or just the partial pressure of condensable gases at liquid nitrogen temperature; this latter method turned out to be very efficient for many samples. For all gas samples, we found 3 He/ 4 He isotopic ratios between 7.1 and 8.2 times the atmospheric ratio, pointing to a magmatic origin for fumaroles both at Iwodake crater and at Shin-Iwojima island. Our measurements show a decrease of the isotopic ratios at Iwodake with decreasing temperature of the fumarole. Comparing the results of both field trips and those published in previous studies, we suggest this volcanic system is undergoing a recent increase of activity.served both on and off-shore, including high (>800°C) and low temperature fumaroles, hot springs and gas bubbling, which provide a good opportunity to sample and study this volcanic system. In this aim, helium has interesting properties: a gaseous state, inertness, and above all, its isotopes show contrasting ratios in the continental crust (<0

show abstract

Helium and argon isotope systematics of the central Lau Basin and Valu Fa Ridge: Evidence of crust/mantle interactions in a back-arc basin

Cited by 148 publications

References 71 publications

Sources, degassing, and contamination of CO2, H2O, He, Ne, and Ar in basaltic glasses from Kolbeinsey Ridge, North Atlantic

Sources, degassing, and contamination of CO2, H2O, He, Ne, and Ar in basaltic glasses from Kolbeinsey Ridge, North Atlantic

High-3He/4He, depleted mantle and low-δ18O, recycled oceanic lithosphere in the source of central Iceland magmatism

Helium isotopes at Satsuma-Iwojima volcano, Japan.

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