SYDNEY, Aug. 11 (Xinhua) — Australian scientists believe they have found strong evidence that Earth’s continents were formed by a massive meteorite impact more than three billion years ago. increase.
Their discovery, published in the Nature Journal, is based on a survey of small zircon crystals in rocks in an area known as the Pilbara Craton, in the northwestern part of Western Australia (WA).
The Pilbara Craton has long been a geological interested in academics.
Dr. Tim Johnson, Associate Professor of Earth and Planetary Sciences at Curtin University, explained the latest research, saying that oxygen isotopes in zircon crystals are “prevalent in near-surface rocks, consistent with the geological effects of giant meteorite impacts.” reveals a deeper process that begins with the melting of the
Johnson said zircon can survive billions of years unscathed.
“Additionally, measuring the relative proportions of the oxygen isotopes involved can tell us about the environment in which the zircons were formed,” he wrote in an article published Thursday on The Conversation’s website. increase.
Johnson said the study provided the first solid evidence that the process that eventually formed the continents began with the impact of a giant meteorite.
“Data relating to other regions of ancient continental crust on Earth seem to point to patterns similar to those recognized in Western Australia,” he said. “So we want to test our findings on these ancient rocks to see if our model can be applied more broadly.”
Australian researchers believe giant meteorites created Earth’s continents
Source link Australian researchers believe giant meteorites created Earth’s continents