The helium contents of metallic meteorites
Journal Article
·
· Journal of Geophysical Research
The He/sup 3/ and He/sup 4/ concentrations were measured in 53 samples taken from 34 different metallic meteorites. Two meteorites were identified, Deep Springs and Clark County, that have considerably higher helium concentrations than any previously measured. The hexahedrites Edmonton and Braunau probably have the lowest He/sup 3//He/sup 4/ ratio yet found, with the possible exception of selected samples from Washington County. The exposure ages relative to Grant were estimated for 25 of the meteorites. The estimates for the 3 oldest are: Deep Springs, 1550; Pinon, 1140; and Clark County, 1050 m.y. The lowest age found in this study was 40 m.y. for Monahans. The helium concentrations in the meteorites of low nickel content are lower than those in the medium octahedrites. The hexahedrites, as a class, have especially low helium concentrations and low ratios, but this study did reveal two hexahedrites, Iredell and Cedartown, that have higher helium concentrations and normal ratios. It is suggested that the anomalous helium concentrations of the hexahedrites are attributable to the presence of a small concentration of background helium that contains little, if any, He/sup 3/.
- Research Organization:
- Pennsylvania State Univ., University Park
- Sponsoring Organization:
- USDOE
- NSA Number:
- NSA-17-041685
- OSTI ID:
- 4627654
- Journal Information:
- Journal of Geophysical Research, Journal Name: Journal of Geophysical Research Journal Issue: 21 Vol. 68; ISSN 0148-0227
- Publisher:
- American Geophysical Union
- Country of Publication:
- Country unknown/Code not available
- Language:
- English
Similar Records
CHLORINE 36 AND ARGON 39 IN METEORITES AND THE EXPOSURE AND TERRESTRIAL AGES OF IRON METEORITES
THE FREQUENCY OF THE HELIUM AND NEON ISOTOPES PRODUCED BY COSMIC RADIATION IN SOME IRON METEORITES
MASS SPECTROMETRIC MEASUREMENT OF THE ISOTOPIC FREQUENCY OF POTASSIUM FROM IRON METEORITES AND THE PROBLEMS OF THE DETERMINATION OF THE K$sup 41$ -K$sup 40$ RADIATION AGE
Technical Report
·
Sun Dec 31 23:00:00 EST 1961
·
OSTI ID:4632046
THE FREQUENCY OF THE HELIUM AND NEON ISOTOPES PRODUCED BY COSMIC RADIATION IN SOME IRON METEORITES
Journal Article
·
Tue Aug 01 00:00:00 EDT 1961
· Zeitschrift fuer Naturforschung (West Germany) Divided into Z. Nautrforsch., A, and Z. Naturforsch., B: Anorg. Chem., Org. Chem., Biochem., Biophys.,
·
OSTI ID:4825576
MASS SPECTROMETRIC MEASUREMENT OF THE ISOTOPIC FREQUENCY OF POTASSIUM FROM IRON METEORITES AND THE PROBLEMS OF THE DETERMINATION OF THE K$sup 41$ -K$sup 40$ RADIATION AGE
Journal Article
·
Sun Oct 01 00:00:00 EDT 1961
· Zeitschrift fuer Naturforschung (West Germany) Divided into Z. Nautrforsch., A, and Z. Naturforsch., B: Anorg. Chem., Org. Chem., Biochem., Biophys.,
·
OSTI ID:4802034