Light noble gas records and cosmic ray exposure histories of recent ordinary chondrite falls

2021 ◽  
Author(s):  
Thomas Smith ◽  
Huaiyu He ◽  
Shijie Li ◽  
P. M. Ranjith ◽  
Fei Su ◽  
...  
Keyword(s):  
Noble Gas ◽  
Cosmic Ray ◽  
Ordinary Chondrite

scholarly journals A Petrologic and Noble Gas Isotopic Study of New Basaltic Eucrite Grove Mountains 13001 from Antarctica

Minerals ◽  
2021 ◽  
Vol 11 (3) ◽  
pp. 279
Author(s):  
Chuantong Zhang ◽  
Bingkui Miao ◽  
Huaiyu He ◽  
Hongyi Chen ◽  
P. M. Ranjith ◽  
...  
Keyword(s):  
Noble Gas ◽  
Research Work ◽  
Cosmic Ray ◽  
Parent Body ◽  
Chemical Compositions ◽  
Isotopic Study ◽  
Impact Processes ◽  
Antarctic Research ◽  
Formation And Evolution ◽  
Grove Mountains

Howardite-Eucrite-Diogenite (HED) meteorite clan is a potential group of planetary materials which provides significant clues to understand the formation and evolution of the solar system. Grove Mountains (GRV) 13001 is a new member of HED meteorite, recovered from the Grove Mountains of Antarctica by the Chinese National Antarctic Research Expedition. This research work presents a comprehensive study of the petrology and mineralogy, chemical composition, noble gas isotopes, cosmic-ray exposure (CRE) age and nominal gas retention age for the meteorite GRV 13001. The output data indicate that GRV 13001 is a monomict basaltic eucrite with typical ophitic/subophitic texture, and it consists mainly of low-Ca pyroxene and plagioclase with normal eucritic chemical compositions. The noble gas based CRE age of the GRV 13001 is approximately 29.9 ± 3.0 Ma, which deviates from the major impact events or periods on the HED parent body. Additionally, the U,Th-4He and 40K-40Ar gas retention ages of this meteorite are ~2.5 to 4.0 Ga and ~3.6 to 4.1 Ga, respectively. Based on the noble gases isotopes and the corresponding ages, GRV 13001 may have experienced intense impact processes during brecciation, and weak thermal event after the ejection event at approximately 30 Ma.

scholarly journals Noble Gas Record of Japanese Chondrites

1989 ◽  
Vol 44 (10) ◽  
pp. 935-944
Author(s):  
Nobuo Takaoka ◽  
Masako Shima ◽  
Fumitaka Wakabayashi
Keyword(s):  
Noble Gas ◽  
Cosmic Ray ◽  
Ordinary Chondrites ◽  
Isotopic Signatures ◽  
Shock Heating ◽  
H Chondrites ◽  
Gas Loss ◽  
Exposure Ages ◽  
Cosmic Ray Exposure Ages ◽  
Gas Component

Abstract Concentrations and isotopic ratios of noble gases are reported for nineteen Japanese chondrites. Among those, Nio (H3-4) is a solar-gas-rich meteorite.U/Th - He ages are younger than K - Ar ages for all meteorites studied. Six of the nine L-chondrites give significantly young K-Ar ages, suggesting gas loss by impact shock heating. The remaining three L-chondrites and seven of the ten H-chondrites have K-Ar ages older than 4 Ga. The L-chondrite Nogata and the H-chondrites Numakai, Ogi and Higashi-Koen have concordant ages.Cosmic-ray exposure ages for six of the H-chondrites show clustering around the 6-Myr peak in the distribution of exposure ages, while those for the L-chondrites, ranging from 8.2 to 64 Myr, do not show clustering.Fukutomi (L4) contains trapped 36Ar in excess, 3.5 times enriched compared to the highest value so far reported for type-4 ordinary chondrites except solar-gas-rich chondrites. The 36Ar/132Xe and 84Kr/132Xe ratios fit along a mixing line between a planetary and a sub-solar (or argon-rich) component found in separates of E-chondrites [43], The Xe isotopic composition is identical with that in Abee and Kenna. The isotopic signatures suggest that this meteorite may contain mineral fragments bearing the noble gas component found in E-chondrites or ureilites. Fukutomi also contains 80Kr, 82Kr and 128Xe produced by epithermal neutron captures on 79Kr, 81Kr and 127I, respectively. From the neutron-produced Kr, the preatmospheric minimum radius is estimated to be 20 cm with an assumption of a spherical meteoroid.

scholarly journals Noble gas record and cosmic-ray exposure history of the new CO3 chondrite Moss--Comparison with Lancé and other CO chondrite falls

2010 ◽  
Vol 45 (8) ◽  
pp. 1380-1391 ◽  
Author(s):  
Rainer BARTOSCHEWITZ ◽  
Ulrich OTT ◽  
Luitgard FRANKE ◽  
Siegfried HERRMANN ◽  
Yukio YAMAMOTO ◽  
...  
Keyword(s):  
Noble Gas ◽  
Cosmic Ray ◽  
History Of ◽  
Exposure History

Relationships among lodranites and acapulcoites: noble gas isotopic abundances, chemical composition, cosmic-ray exposure ages, and solar cosmic ray effects

1999 ◽  
Vol 63 (2) ◽  
pp. 175-192 ◽  
Author(s):  
Andreas Weigel ◽  
Otto Eugster ◽  
Christian Koeberl ◽  
Rolf Michel ◽  
Urs Kr̈ahenb̈uhl ◽  
...  
Keyword(s):  
Chemical Composition ◽  
Noble Gas ◽  
Cosmic Ray ◽  
Isotopic Abundances ◽  
Ray Effects ◽  
Exposure Ages ◽  
Cosmic Ray Effects ◽  
Cosmic Ray Exposure Ages

Noble gas and cosmic-ray exposure age of Juancheng chondrite

1999 ◽  
Vol 44 (12) ◽  
pp. 1142-1143 ◽  
Author(s):  
Daode Wang ◽  
Ruitian Wang
Keyword(s):  
Noble Gas ◽  
Cosmic Ray ◽  
Exposure Age ◽  
Cosmic Ray Exposure Age

Noble gas, nitrogen composition and cosmic ray exposure history of two eucrites Vissannapeta, Piplia Kalan and one howardite Lohawat

2019 ◽  
Vol 165 ◽  
pp. 23-30
Author(s):  
Ramakant R. Mahajan ◽  
Amit Basu Sarbadhikari ◽  
M.S. Sisodia
Keyword(s):  
Noble Gas ◽  
Cosmic Ray ◽  
History Of ◽  
Exposure History

Über die leichten Edelgase in dem Chondriten Kirin / About the Light-weight Noble Gases in the Kirin H-chondrites

1980 ◽  
Vol 35 (1) ◽  
pp. 37-43
Author(s):  
F. Begemann ◽  
O. Braun ◽  
H. W. Weber
Keyword(s):  
Noble Gas ◽  
Cosmic Ray ◽  
Parent Body ◽  
Cosmogenic Nuclides ◽  
Gas Release ◽  
Catastrophic Event ◽  
H Chondrites ◽  
Release Curve ◽  
The Difference ◽  
Strong Diffusion

Results are reported for the contents of He, Ne, and Ar of three different specimens from the Kirin H-chondrite which, with a recovered weight of about 4000 kg, is the largest known stone meteorite. The concentrations of spallogenic gases cover a range of more than a factor of two; bulk samples with ratios 3He/21Ne ≲ 2 and a FeNi nugget with 3He/38Ar = 8.8 ± 0.6 indicate strong diffusion losses of 3He from the silicates and of tritium from the metal. - Radiogenic 4He and 40Ar have been affected by diffusion, too, resulting in discordant U/Th-4He- and 40K-40Argas retention ages as well as distinctly different ages for different samples. Stepwise heating experiments show the main release of 4He and 40Ar to occur at around 800 °C and the difference in the gas contents to be due to differences in the low-temperature part of the gas release curve. - An attempt is made to account for the observed positive correlation between the concentrations of spallogenic and radiogenic noble gas nuclides. Either the diffusion losses of both have occured at the same time which requires a (quasi-)continuous loss due to a small perihelion distance or a catastrophic event late during the cosmic ray exposure history, but more than about 105 years before the fall of the meteorite. As an alternative model it is suggested that the Kirin meteoroid was hot upon the ejection from its parent body. As the subsequent cooling rate of the meteoroid is smallest in the interior the diffusion losses of radiogenic 4He and 40Ar will be largest where the production rate of the cosmogenic nuclides is smallest.

Noble gas concentrations and cosmic ray exposure ages of eight recently fallen chondrites

1973 ◽  
Vol 37 (11) ◽  
pp. 2417-2433 ◽  
Author(s):  
D.D Bogard ◽  
M.A Reynolds ◽  
L.A Simms
Keyword(s):  
Noble Gas ◽  
Cosmic Ray ◽  
Exposure Ages ◽  
Cosmic Ray Exposure Ages

Cosmogenic Nuclides

2020 ◽  
Author(s):  
Rainer Wieler
Keyword(s):  
Noble Gas ◽  
Cosmic Ray ◽  
Parent Body ◽  
Cosmogenic Nuclides ◽  
Cosmogenic Nuclide ◽  
Production Models ◽  
History Of ◽  
Noble Gas Isotopes ◽  
Exposure Ages

Cosmogenic nuclides are produced by the interaction of energetic elementary particles of galactic (or solar) cosmic radiation and their secondaries with atomic nuclei in extraterrestrial or terrestrial material. Cosmogenic nuclides usually are observable only for some noble gas isotopes, whose natural abundances in the targets of interest are exceedingly low; some radioactive isotopes with half-lives mostly in the million-year range; and a few stable nuclides of elements, such as Gd and Sm, whose abundance is sizably modified by reactions with low energy secondary cosmic ray neutrons. In solid matter, the mean attenuation length of galactic cosmic ray protons is on the order of 50 cm. Therefore, cosmogenic nuclides are a major tool in studying the history of small objects in space and of matter near the surfaces of larger parent bodies. A classical application is to measure “exposure ages” of meteorites, namely the time they spent as a small body in interplanetary space. In some cases, also the previous history of the future meteorite in its parent-body regolith can be constrained. Such information helps to understand delivery mechanisms of meteorites from their parent asteroids or parent planets and to constrain the number of ejection events responsible for the collected meteorites. Cosmogenic nuclides in lunar samples from known depths of up to ~2 m serve to study the deposition and mixing history of the lunar regolith over hundreds of millions of years, as well as to calibrate nuclide production models. Present and future sample return missions rely on cosmogenic nuclide measurements as important tools to constrain the sample’s exposure history or loss rates of their parent body surfaces to space. The first data from cosmogenic noble gas isotopes measured on the surface of Mars demonstrate that the exposure and erosional history of planetary bodies can be obtained by in-situ analyses. For the foreseeable future, exposure ages of presolar grains in meteorites are presumably the only means to quantitatively constrain their presolar history. In some cases, irradiation effects of energetic particles from the early sun can be detected in early solar system condensates, confirming that the early sun was likely much more active than today, as expected from observations of young stars. The ever-increasing precision of isotope analyses also reveals tiny isotopic anomalies induced by cosmic-ray effects in several elements of interest in cosmochemistry, which need to be recognized and corrected for. Cosmogenic nuclide studies rely on the knowledge of their production rates, which depend on the elemental composition of a sample and its “shielding” during irradiation, that is, its position within an irradiated object and for meteorites their preatmospheric size. The physics of cosmogenic nuclide production is basically well understood and has led to sophisticated production models. They are most successful if a sample’s shielding can be constrained by the analyses of several cosmogenic nuclides with different depth dependencies of their production rates. Cosmogenic nuclides are also an important tool in Earth Sciences. The foremost example is 14C produced in the atmosphere and incorporated into organic material, which is used for dating. Cosmogenic radionuclides and noble gases produced in-situ in near surface samples, mostly by secondary cosmic-ray neutrons, are an important tool in quantitative geomorphology and related fields.

The Noble Gas Record in Antarctic and Other Meteorites

1983 ◽  
Vol 38 (2) ◽  
pp. 267-272 ◽  
Author(s):  
H. W. Weber ◽  
O. Braun ◽  
L. Schultz ◽  
F. Begemann
Keyword(s):  
Isotopic Composition ◽  
Noble Gas ◽  
Cosmic Ray ◽  
Retention Model ◽  
Meteorite Fall ◽  
Exposure Ages ◽  
Cosmic Ray Exposure Ages ◽  
Independent Individual

Abstract Data are reported for the concentration and isotopic composition of He, Ne, and Ar in 11 Antarctic and 8 other stone meteorites. Cosmic ray exposure ages and whole rock gas retention model ages are given. The noble gas record suggests that all three ALLAN HILLS eucrites analysed so far belong to the same meteorite fall while the three eucrites from the ELEPHANT MORAINE area appear to be three independent individual falls.

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