Recreating the Extreme Forces of an Asteroid Impact in the Lab - by spacewriter
“For more than 60 years, these lamellar structures have served as an indicator of an asteroid impact, but no one knew until now how this structure was formed in the first place,” Liermann said, discussing a set of techniques that allowed them to study these shocked grains. “We have now solved this decades-old mystery.”
The impact simulated at the Jena lab creates tiny glass lamellae in quartz crystald. These structures are only tens of nanometers wide, so they had to be studied using an electron microscope. Courtesy: Falko Langenhorst, Christoph Otzen . “We observed that at a pressure of about 180,000 atmospheres, the quartz structure suddenly transformed into a more tightly packed transition structure, which we call rosiaite-like,” reported team member Christoph Otzen, who is writing his doctoral thesis on these studies. .)
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