Heavy noble gases in solar wind delivered by Genesis mission

Meshik, A. P.; Hohenberg, C. M.; Pravdivtseva, O. V.; Burnett, D. S.

doi:10.1016/j.gca.2013.11.030

Cited by 97 publications

(107 citation statements)

References 51 publications

Supporting

Mentioning

100

Contrasting

Order By: Relevance

“…In agreement with previous studies (e.g., Garrison and Bogard, 1998;Mathew et al, 1998;Conrad et al, 2016), Martian atmospheric Xe measured in sample Glass 3 is related by mass-dependent isotope fractionation (Pepin, 1991) to Solar Wind Xe (SW-Xe, Meshik et al, 2014). This initial isotope composition does not leave space for a contribution of 244 Pu-derived fissiogenic Xe (Ozima and Podosek, 2002) to the Martian atmosphere (Conrad et al, 2016) since the mass-fractionation of SW-Xe already matches the isotope composition of Martian atmospheric Xe.…”

Section: Origin and Evolution Of The Martian Atmospheric Xesupporting

confidence: 90%

“…Krypton extracted at higher temperature (1225 °C and 1700 ºC) is enriched in light isotopes and depleted in heavy isotopes compared to the solar composition (Meshik et al, 2014) (Fig. 3b).…”

Section: Resultsmentioning

confidence: 95%

“…(Ozima and Podosek, 2002) and Martian atmospheres (Mathew et al, 1998). Chassigny is from Ott (1988) and is comparable to SW-Xe (Meshik et al, 2014). Chondritic (Q-Xe) from Busemann et al (2000).…”

Section: Resultsmentioning

confidence: 96%

“…Interestingly, Conrad et al (2016) pointed out the presence of hydrocarbons preventing interpretations of 78 Kr data. These could also have interfered with 80 Kr (m/z = 80) measurements as well as "change-of-charge" effects involving energetic 40 Ar + ions (Meshik et al, 2014). (Conrad et al, 2016) and in other Martian meteorites (Mathew et al, 1998) are also displayed.…”

Section: Origin and Evolution Of The Martian Atmospheric Xementioning

confidence: 99%

“…(Conrad et al, 2016) and in other Martian meteorites (Mathew et al, 1998) are also displayed. All data are normalised to 132 Xe and to SW-Xe (Meshik et al, 2014) 129 Xe excesses relative to SW-Xe are shown in the top-right sub-panel. Xe isotope spectra corrected for terrestrial Xe, for 1 Myr and 0.7 Myr of cosmic-ray exposure are also shown.…”

Section: Origin and Evolution Of The Martian Atmospheric Xementioning

confidence: 99%

See 4 more Smart Citations

Noble gases and nitrogen in Tissint reveal the composition of the Mars atmosphere

Avice¹,

Bekaert²,

Aoudjehane³

et al. 2018

Geochem. Persp. Let.

View full text Add to dashboard Cite

Comparative planetology is crucial to unravel the origin and evolution of volatile elements on terrestrial planets. We report precise measurements of the elemental and isotopic composition of nitrogen and noble gases in the Martian meteorite Tissint. Ar-N 2 correlations confirm discrepancies between results from Viking and Martian meteorites and those from the Mars Science Laboratory (MSL) mission. The Martian atmospheric 40 Ar/ 36 Ar ratio is estimated to be 1714 ± 170 (1σ), lower than the value determined by Viking but in agreement with, and with higher precision than, data from MSL. We confirm a solar wind-like origin for Martian Kr and Xe. Excesses on light Kr isotopes are lower than those measured by MSL. Cosmogenic excesses in the Xe isotopic spectrum could have been produced in space during exposure of the Tissint parent body to cosmic rays.

show abstract

Section: Origin and Evolution Of The Martian Atmospheric Xesupporting

confidence: 90%

Section: Resultsmentioning

confidence: 95%

Section: Resultsmentioning

confidence: 96%

Section: Origin and Evolution Of The Martian Atmospheric Xementioning

confidence: 99%

Section: Origin and Evolution Of The Martian Atmospheric Xementioning

confidence: 99%

See 3 more Smart Citations

Noble gases and nitrogen in Tissint reveal the composition of the Mars atmosphere

Avice¹,

Bekaert²,

Aoudjehane³

et al. 2018

Geochem. Persp. Let.

View full text Add to dashboard Cite

show abstract

Multiple carriers of Q noble gases in primitive meteorites

Marrocchi

Avice

Estrade

2015

Geophysical Research Letters

View full text Add to dashboard Cite

The main carrier of primordial heavy noble gases in chondrites is thought to be an organic phase, known as phase Q, whose precise characterization has resisted decades of investigation. Indirect techniques have revealed that phase Q might be composed of two subphases, one of them associated with sulfide. Here we provide experimental evidence that noble gases trapped within meteoritic sulfides present chemically and thermally driven behavior patterns that are similar to Q gases. We therefore suggest that phase Q is likely composed of two subcomponents: carbonaceous phases and sulfides. In situ decay of iodine at concentration levels consistent with those reported for meteoritic sulfides can reproduce the 129Xe excess observed for Q gases relative to fractionated solar wind. We suggest that the Q‐bearing sulfides formed at high temperature and could have recorded the conditions that prevailed in the chondrule‐forming region(s).

show abstract

Xenon isotopes in the MORB source, not distinctive of early global degassing

Boehnke

Caffee

Harrison

2015

Geophysical Research Letters

View full text Add to dashboard Cite

Although fissiogenic Xe in mid‐ocean ridge basalt (MORB) has long been used inferred to infer an early (>4 Ga) catastrophic mantle degassing, decomposition of the analyzed gas in terms of its constituents requires several assumptions. The canonical interpretation has not been tested using the full spectrum of possible initial components and radiogenic inputs. We use a Markov chain Monte Carlo approach that examines a broad range of Xe isotopic components present during Earth formation and evolution. Our best fit simulations are consistent with the preservation of much higher Pu/U in MORB source Xe than previously recognized but are equally supportive of both limited and early catastrophic loss. We show that an initially Xe depleted upper mantle that becomes progressively ingassed through both radiogenic ingrowth and subduction of evolving atmospheric Xe is equally consistent with all evidence, underscoring the need for improvements to our knowledge of fission Xe spectra, MORB Xe measurements, and Pu geochemistry.

show abstract

Heavy noble gases in solar wind delivered by Genesis mission

Cited by 97 publications

References 51 publications

Noble gases and nitrogen in Tissint reveal the composition of the Mars atmosphere

Noble gases and nitrogen in Tissint reveal the composition of the Mars atmosphere

Multiple carriers of Q noble gases in primitive meteorites

Xenon isotopes in the MORB source, not distinctive of early global degassing

Contact Info

Product

Resources

About