Ar-40-Ar-39 ages of Allende
Journal Article
·
· Icarus; (United States)
K-Ar and/or Ar-40-Ar-39 plateau ages of Allende samples - whole rock, matrix, chondrules, white inclusions - range from 3.8 AE for matrix to greater than approximately 5 AE for some white inclusions, but cluster strongly near 4.53 AE. This age marks the dominant K-Ar resetting of Allende materials. Age spectra show disturbances due to Ar-39 recoil or some other argon redistribution processes. Possible explanations for the apparent presolar ages (greater than 4.6 AE) include: greater than approximately 20% loss of AR-39, greater than approximately 40% loss of K-40 approximately 3.8 AE ago with no loss of Ar-40, trapped argon of unique AR-40/AR-36 isotopic composition, admixture of very old presolar grains.
- Research Organization:
- Max-Planck-Institut fuer Kernphysik, Heidelberg, West Germany
- OSTI ID:
- 6864825
- Journal Information:
- Icarus; (United States), Journal Name: Icarus; (United States) Vol. 42; ISSN ICRSA
- Country of Publication:
- United States
- Language:
- English
Similar Records
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Conference
·
Sun Feb 28 23:00:00 EST 1993
· Geological Society of America, Abstracts with Programs; (United States)
·
OSTI ID:5579728
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Journal Article
·
Sat Oct 01 00:00:00 EDT 1988
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·
OSTI ID:5180533
Direct dating of weathering phenomena by [sup 40]Ar/[sup 39]Ar and K-Ar analysis of supergene K-Mn oxides
Journal Article
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Mon Feb 28 23:00:00 EST 1994
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·
OSTI ID:7181219
Related Subjects
58 GEOSCIENCES
580100 -- Geology & Hydrology-- (-1989)
640107* -- Astrophysics & Cosmology-- Planetary Phenomena
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
AGE ESTIMATION
ALKALI METAL ISOTOPES
ARGON 36
ARGON 39
ARGON 40
ARGON ISOTOPES
BETA DECAY RADIOISOTOPES
BETA-MINUS DECAY RADIOISOTOPES
BETA-PLUS DECAY RADIOISOTOPES
CHEMICAL COMPOSITION
CHONDRITES
COHERENT SCATTERING
DIFFRACTION
ELECTRON CAPTURE RADIOISOTOPES
ELECTRON MICROSCOPY
EVEN-EVEN NUCLEI
EVEN-ODD NUCLEI
ISOTOPE DATING
ISOTOPES
LIGHT NUCLEI
MASS SPECTROSCOPY
METEORITES
MICROANALYSIS
MICROSCOPY
MINERALOGY
NUCLEI
ODD-ODD NUCLEI
POTASSIUM 40
POTASSIUM ISOTOPES
RADIOISOTOPES
SCATTERING
SPECTROSCOPY
STABLE ISOTOPES
STONE METEORITES
TABLES
X-RAY DIFFRACTION
YEARS LIVING RADIOISOTOPES
580100 -- Geology & Hydrology-- (-1989)
640107* -- Astrophysics & Cosmology-- Planetary Phenomena
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
AGE ESTIMATION
ALKALI METAL ISOTOPES
ARGON 36
ARGON 39
ARGON 40
ARGON ISOTOPES
BETA DECAY RADIOISOTOPES
BETA-MINUS DECAY RADIOISOTOPES
BETA-PLUS DECAY RADIOISOTOPES
CHEMICAL COMPOSITION
CHONDRITES
COHERENT SCATTERING
DIFFRACTION
ELECTRON CAPTURE RADIOISOTOPES
ELECTRON MICROSCOPY
EVEN-EVEN NUCLEI
EVEN-ODD NUCLEI
ISOTOPE DATING
ISOTOPES
LIGHT NUCLEI
MASS SPECTROSCOPY
METEORITES
MICROANALYSIS
MICROSCOPY
MINERALOGY
NUCLEI
ODD-ODD NUCLEI
POTASSIUM 40
POTASSIUM ISOTOPES
RADIOISOTOPES
SCATTERING
SPECTROSCOPY
STABLE ISOTOPES
STONE METEORITES
TABLES
X-RAY DIFFRACTION
YEARS LIVING RADIOISOTOPES