Sentences with phrase «zircon samples»

Linking the year to the event was impossible prior to the recent breakthrough in the processing of zircon samples.

Then in 2004, geochronologists at Berkeley — Ludwig, Renne, and Roland Mundil, working with Australian geologist Ian Metcalfe — improved the pretreatment of volcanic zircon samples gathered in China.

Not exact matches

A research team led by John Tarduno of the University of Rochester in New York went to Australia's Jack Hills and collected ancient samples of rock containing the crystallized mineral zircon.

Professor Luca Caricchi adds: «When we determine the age of a family of zircons from a small sample of solidified magmatic rock, using results from the mathematical model we have developed, we can tell what the size of the entire magma chamber was, as well as how fast the magma reservoir grew.»

Last year, Humayun's team correctly determined that the zircons in its Black Beauty sample were an astonishing 4.4 billion years old.

Instead of being randomly distributed in the sample, as predicted, lead atoms in the zircon were clumped together, like «raisins in a pudding,» notes Valley.

The zircons analyzed by Humayun's team were from Black Beauty samples kept in Paris.

Utilizing a new instrument that takes 3D images of individual atoms within a crystal, an international team of investigators has proved a rare sample of zircon is the oldest piece...

For the study, they looked at data for roughly 120,000 zircon grains from thousands of samples across the globe.

Our sampling sites in Zircon and rutile can grow under or near peak ultrahigh - temperature conditions.