911爆料网

New 911爆料网 research has uncovered a striking link between the structure of our galaxy and the evolution of Earth鈥檚 crust, showing its development was shaped by the impact of meteorites during its journey through the Milky Way and not solely through internal processes as was previously widely considered.

The study, published in journal 鈥楶hysical Review Research鈥�, reveals that the chemistry of tiny ancient crystals in Earth鈥檚 crust may capture the rhythm of meteorite impacts during our solar system鈥檚 passage through the Milky Way鈥檚 vast spiral arms.

Lead researcher Professor Chris Kirkland, from the within 911爆料网鈥檚 Frontier Institute for Geoscience Solutions in the School of Earth and Planetary Sciences, said the work provides new evidence linking Earth鈥檚 ancient geological record with the large-scale structure of the Milky Way.

鈥淭iny, durable minerals called zircon crystals provided a unique archive of Earth鈥檚 interaction with the galaxy,鈥� Professor Kirkland said.

鈥淏y looking at chemical changes in zircon crystals and comparing them with maps of gas in the Milky Way, we saw the changes line up with times that our Solar System passed through the galaxy鈥檚 spiral arms, which are densely packed with stars and gas.

鈥淚n these crowded regions, extra gravitational forces may have disturbed icy comets at the edge of our Solar System, knocking some onto paths that sent them crashing into Earth.

鈥淭he resulting impacts released enormous energy, melting parts of Earth鈥檚 surface and producing more complex magmas, especially when interacting with water-rich environments.鈥�

Professor Kirkland said the study鈥檚 findings open the door to an exciting new frontier, where geology can be directly connected with discoveries in astronomy.

鈥淥ur research reveals that Earth鈥檚 geological evolution cannot be understood in isolation from the broader galactic environment,鈥� Professor Kirkland said.

鈥淚t suggests that astrophysical processes on the scale of the Milky Way may have directly influenced the continents beneath our feet and the conditions that made life possible, ushering in a new era of astro-geological science.鈥�

The full research paper, titled 鈥楩rom the grain to galactic scale; Milky Way neutral hydrogen and terrestrial zircon oxygen support coupling of astrophysical and geological processes over deep time鈥�, can be found online here: