40Ar39Ar ages of Allende

Elmar K. Jessberger; Bogna Dominik; Thomas Staudacher; Gregory F. Herzog

doi:10.1016/0019-1035(80)90103-7

⁴⁰Ar³⁹Ar ages of Allende

Elmar K. Jessberger, Bogna Dominik, Thomas Staudacher, Gregory F. Herzog

Research output: Contribution to journal › Article › peer-review

39 Scopus citations

Abstract

KAr and/or ⁴⁰Ar³⁹Ar plateau ages of Allende samples-whole rock, matrix, chondrules, white inclusions-range from 3.8 AE for matrix of ≳5 AE for some white inclusions, but cluster strongly near 4.53 AE. This age marks the dominant KAr resetting of Allende materials. Age spectra show disturbances due to ³⁹Ar recoil or some other argon redistribution processes. Possible explanations for the apparent presolar ages (>4.6 AE) include: ≳20% loss of ³⁹Ar; ≳40% loss of ⁴⁰K ∼3.8 AE ago with no loss of ⁴⁰Arl trapped argon of unique ⁴⁰Ar/³⁶Ar isotopic composition; admixture of "very old" presolar grains.

Original language	English (US)
Pages (from-to)	380-405
Number of pages	26
Journal	Icarus
Volume	42
Issue number	3
DOIs	https://doi.org/10.1016/0019-1035(80)90103-7
State	Published - Jun 1980
Externally published	Yes

All Science Journal Classification (ASJC) codes

Astronomy and Astrophysics
Space and Planetary Science

Access to Document

10.1016/0019-1035(80)90103-7

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@article{860b82bffbdc48589ebd7067574431a5,

title = "40Ar39Ar ages of Allende",

abstract = "KAr and/or 40Ar39Ar plateau ages of Allende samples-whole rock, matrix, chondrules, white inclusions-range from 3.8 AE for matrix of ≳5 AE for some white inclusions, but cluster strongly near 4.53 AE. This age marks the dominant KAr resetting of Allende materials. Age spectra show disturbances due to 39Ar recoil or some other argon redistribution processes. Possible explanations for the apparent presolar ages (>4.6 AE) include: ≳20% loss of 39Ar; ≳40% loss of 40K ∼3.8 AE ago with no loss of 40Arl trapped argon of unique 40Ar/36Ar isotopic composition; admixture of {"}very old{"} presolar grains.",

author = "Jessberger, {Elmar K.} and Bogna Dominik and Thomas Staudacher and Herzog, {Gregory F.}",

year = "1980",

month = jun,

doi = "10.1016/0019-1035(80)90103-7",

language = "English (US)",

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pages = "380--405",

journal = "Icarus",

issn = "0019-1035",

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TY - JOUR

T1 - 40Ar39Ar ages of Allende

AU - Jessberger, Elmar K.

AU - Dominik, Bogna

AU - Staudacher, Thomas

AU - Herzog, Gregory F.

PY - 1980/6

Y1 - 1980/6

N2 - KAr and/or 40Ar39Ar plateau ages of Allende samples-whole rock, matrix, chondrules, white inclusions-range from 3.8 AE for matrix of ≳5 AE for some white inclusions, but cluster strongly near 4.53 AE. This age marks the dominant KAr resetting of Allende materials. Age spectra show disturbances due to 39Ar recoil or some other argon redistribution processes. Possible explanations for the apparent presolar ages (>4.6 AE) include: ≳20% loss of 39Ar; ≳40% loss of 40K ∼3.8 AE ago with no loss of 40Arl trapped argon of unique 40Ar/36Ar isotopic composition; admixture of "very old" presolar grains.

AB - KAr and/or 40Ar39Ar plateau ages of Allende samples-whole rock, matrix, chondrules, white inclusions-range from 3.8 AE for matrix of ≳5 AE for some white inclusions, but cluster strongly near 4.53 AE. This age marks the dominant KAr resetting of Allende materials. Age spectra show disturbances due to 39Ar recoil or some other argon redistribution processes. Possible explanations for the apparent presolar ages (>4.6 AE) include: ≳20% loss of 39Ar; ≳40% loss of 40K ∼3.8 AE ago with no loss of 40Arl trapped argon of unique 40Ar/36Ar isotopic composition; admixture of "very old" presolar grains.

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