Noble gases in a new meteorite, the Omolon pallasite
Abstract
The Omolon meteorite was observed to reach the earth's surface in May 1981 over a large area of the Magadan region, USSR; samples of the pallasite were collected in 1982 near the Omolon river, 64 deg 01 min N, 161 deg 48 min E. The objective of the study was to investigate the isotope composition and noble gas concentration of olivine from the Omolon pallasite in order to identify various genetic components of the gases, estimate the radiation age of the meteorite, and determine the time of olivine crystallization. Data on the isotope composition and contents of He, Ne, Ar, Kr, and Xe are presented, and some characteristic features of the isotope composition are discussed. The radiation age of the pallasite is estimated at 94 +/- 18 million years.
- Publication:
-
Akademiia Nauk SSSR Doklady
- Pub Date:
- 1991
- Bibcode:
- 1991DoSSR.321..825S
- Keywords:
-
- Iron Meteorites;
- Meteoritic Composition;
- Olivine;
- Rare Gases;
- Stony Meteorites;
- Chemical Composition;
- Isotope Separation;
- Radioactive Age Determination;
- Trace Elements;
- Lunar and Planetary Exploration