Sentences with phrase «tungsten isotopes»
The tungsten isotopes also showed that both groups existed at the same time.
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The tungsten isotopes also showed that both groups existed at the same time, between about 1 million and 4 million years after the start of the solar system about 4.57 billion years ago (SN Online: 8/23/10).
Willbold found that Isua rocks carry a different ratio of tungsten isotopes to both modern terrestrial rocks and meteorites (Nature, DOI: 10.1038 / nature10399).
Not exact matches
The problem had been that the hafnium - tungsten dating technique depends not only on measuring the relevant isotopes in meteorites long ago blasted off Mars but also on knowing the relative proportion of hafnium and tungsten in the deep martian mantle.
Exploring why Earth and its moon both contain the same isotopes of the rare metal tungsten — something that couldn't be explained by the Theia collision theory — the researchers» model showed that after the moon formed, other nearby collisions blasted tungsten - containing debris onto both Earth and the newborn moon.
By looking at tungsten and molybdenum isotopes on iron meteorites, the team, made up of scientists from Lawrence Livermore National Laboratory and Institut für Planetologie at the University of Münsterin Germany, found that meteorites are made up from two genetically distinct nebular reservoirs that coexisted but remained separated between 1 million and 3 - 4 million years after the solar system formed.
Tungsten contains one isotope of mass 182 that is created when an isotope of the element hafnium undergoes radioactive decay, meaning its elemental composition changes as it gives off radiation.
They measured variations in these rocks of the abundance of an isotope of tungsten — the same element used to make filaments of incandescent light bulbs.