Possible solar noble-gas component in Hawaiian basalts

Honda, Masahiko; McDougall, Ian; Patterson, Desmond B; Doulgeris, Anthony P.; Clague, David A.

doi:10.1038/349149a0

Cited by 300 publications

(163 citation statements)

References 14 publications

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“…Honda et al (1991) were able to show that the resolved 3 He/ 22 Ne, assuming an accretionary origin, was similar to solar values. This interpretation was reinforced by Patterson et al (1990), who successfully argued against any fractionation of a shallow air contaminant.…”

Section: Neon: a Trapped Meteorite Origin For Terrestrial Mantle Volamentioning

confidence: 66%

What CO ₂ well gases tell us about the origin of noble gases in the mantle and their relationship to the atmosphere

Ballentine

Holland²

2008

Phil. Trans. R. Soc. A.

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Study of commercially produced volcanic CO 2 gas associated with the Colorado Plateau, USA, has revealed substantial new information about the noble gas isotopic composition and elemental abundance pattern of the mantle. Combined with published data from midocean ridge basalts, it is now clear that the convecting mantle has a maximum 20 Ne/ 22 Ne isotopic composition, indistinguishable from that attributed to solar wind-implanted (SWI) neon in meteorites. This is distinct from the higher 20 Ne/ 22 Ne isotopic value expected for solar nebula gases. The non-radiogenic xenon isotopic composition of the well gases shows that 20 per cent of the mantle Xe is 'solar-like' in origin, but cannot resolve the small isotopic difference between the trapped meteorite 'Q'-component and solar Xe. The mantle primordial 20 Ne/ 132 Xe is approximately 1400 and is comparable with the upper end of that observed in meteorites. Previous work using the terrestrial 129 I-129 Xe mass balance demands that almost 99 per cent of the Xe (and therefore other noble gases) has been lost from the accreting solids and that Pu-I closure age models have shown this to have occurred in the first ca 100 Ma of the Earth's history. The highest concentrations of Q-Xe and solar wind-implanted (SWI)-Ne measured in meteorites allow for this loss and these high-abundance samples have a Ne/Xe ratio range compatible with the 'recycled-aircorrected' terrestrial mantle. These observations do not support models in which the terrestrial mantle acquired its volatiles from the primary capture of solar nebula gases and, in turn, strongly suggest that the primary terrestrial atmosphere, before isotopic fractionation, is most probably derived from degassed trapped volatiles in accreting material.By contrast, the non-radiogenic argon, krypton and 80 per cent of the xenon in the convecting mantle have the same isotopic composition and elemental abundance pattern as that found in seawater with a small sedimentary Kr and Xe admix. These mantle heavy noble gases are dominated by recycling of air dissolved in seawater back into the mantle. Numerical simulations suggest that plumes sampling the core-mantle boundary would be enriched in seawater-derived noble gases compared with the convecting mantle, and therefore have substantially lower 40 Ar/ 36 Ar. This is compatible with observation. The subduction process is not a complete barrier to volatile return to the mantle.

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Section: Neon: a Trapped Meteorite Origin For Terrestrial Mantle Volamentioning

confidence: 66%

What CO ₂ well gases tell us about the origin of noble gases in the mantle and their relationship to the atmosphere

Ballentine

Holland²

2008

Phil. Trans. R. Soc. A.

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“…Measurements of Ar and Kr isotopes in ice cores can lead to estimation of firn thickness and temperature (Craig and Wiens, 1996;Severinghaus et al, 2001Severinghaus et al, , 2003. Noble gases in mantle-derived rocks have been used to infer properties of the early history of the earth (Honda et al, 1991;Hiyagon et al, 1992;Farley and Neroda, 1998). Noble gas isotopes produced by cosmic rays yield surface exposure ages for terrestrial rocks (Lal, 1991;Bierman, 1994;Schafer et al, 1999).…”

Section: Introductionmentioning

confidence: 99%

A determination of air-sea gas exchange and upper ocean biological production from five noble gases and tritiugenic helium-3

Stanley¹

2007

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The five noble gases (helium, neon, argon, krypton, and xenon) are biologically and chemically inert, making them ideal oceanographic tracers. Additionally, the noble gases have a wide range of solubilities and molecular diffusivities, and thus respond differently to physical forcing. Tritium, an isotope of hydrogen, is useful in tandem with its daughter helium-3 as a tracer for water mass ages. In this thesis, a fourteen month time-series of the five noble gases, helium-3 and tritium was measured at the Bermuda Atlantic Time-series Study (BATS) site. The time-series of five noble gases was used to develop a parameterization of air-sea gas exchange for oligotrophic waters and wind speeds between 0 and 13 m s −1 that explicitly includes bubble processes and that constrains diffusive gas exchange to ± 6% and complete and partial air injection processes to ± 15%. Additionally, the parameterization is based on weeks to seasonal time scales, matching the time scales of many relevant biogeochemical cycles. The time-series of helium isotopes, tritium, argon, and oxygen was used to constrain upper ocean biological production. Specifically, the helium flux gauge technique was used to estimate new production, apparent oxygen utilization rates were used to quantify export production, and euphotic zone seasonal cycles of oxygen and argon were used to determine net community production. The concurrent use of these three methods allows examination of the relationship between the types of production and begins to address a number of apparent inconsistencies in the elemental budgets of carbon, oxygen, and nitrogen.

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“…Later, a gas mass spectrometer was acquired and Masahiko Honda was appointed to develop a research program in noble gas analysis. 129 Malcolm McCulloch was recruited in 1979 to establish the Sm-Nd geochronological technique, and a then state-ofthe-art automated multi-collector Finnigan MAT 261 was acquired to enable a range of isotope studies including geochemical tracing and modelling using the Sm-Nd system, the K-Ca system for petrogenic work and a search for fission products in U deposits to be pursued. The RSES then acquired an inductively coupled plasma mass spectrometer (ICP-MS) in 1992 and the group became involved in trace element studies.…”

Section: Early Geoscience Ms At the Australian National Universitymentioning

confidence: 99%

A history of mass spectrometry in Australia

Downard

Laeter

2005

J. Mass Spectrom.

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This article traces the history of mass spectrometry in its many guises and applications in the island continent of Australia. An article such as this can never be complete. It instead focuses on contributions of scientists who played a major role in the early establishment of mass spectrometry in Australia. In general, those who are presently active in the field, and whose histories are incomplete, have been mentioned at best only briefly despite their important contributions to the field.

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Possible solar noble-gas component in Hawaiian basalts

Cited by 300 publications

References 14 publications

What CO ₂ well gases tell us about the origin of noble gases in the mantle and their relationship to the atmosphere

What CO ₂ well gases tell us about the origin of noble gases in the mantle and their relationship to the atmosphere

A determination of air-sea gas exchange and upper ocean biological production from five noble gases and tritiugenic helium-3

A history of mass spectrometry in Australia

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Possible solar noble-gas component in Hawaiian basalts

Cited by 300 publications

References 14 publications

What CO 2 well gases tell us about the origin of noble gases in the mantle and their relationship to the atmosphere

What CO 2 well gases tell us about the origin of noble gases in the mantle and their relationship to the atmosphere

A determination of air-sea gas exchange and upper ocean biological production from five noble gases and tritiugenic helium-3

A history of mass spectrometry in Australia

Contact Info

Product

Resources

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What CO ₂ well gases tell us about the origin of noble gases in the mantle and their relationship to the atmosphere

What CO ₂ well gases tell us about the origin of noble gases in the mantle and their relationship to the atmosphere